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Oinktube/node_modules/p2p-media-loader-core/build/p2p-media-loader-core.js
DanieL 3c001dd8e3 Updates node modules
2023-02-17 15:04:26 -03:00

10937 lines
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require=(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
"use strict";
/**
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const SMOOTH_INTERVAL = 1 * 1000;
const MEASURE_INTERVAL = 60 * 1000;
class NumberWithTime {
constructor(value, timeStamp) {
this.value = value;
this.timeStamp = timeStamp;
}
}
class BandwidthApproximator {
constructor() {
this.lastBytes = [];
this.currentBytesSum = 0;
this.lastBandwidth = [];
}
addBytes(bytes, timeStamp) {
this.lastBytes.push(new NumberWithTime(bytes, timeStamp));
this.currentBytesSum += bytes;
while (timeStamp - this.lastBytes[0].timeStamp > SMOOTH_INTERVAL) {
this.currentBytesSum -= this.lastBytes.shift().value;
}
this.lastBandwidth.push(new NumberWithTime(this.currentBytesSum / SMOOTH_INTERVAL, timeStamp));
}
// in bytes per millisecond
getBandwidth(timeStamp) {
while (this.lastBandwidth.length != 0 && timeStamp - this.lastBandwidth[0].timeStamp > MEASURE_INTERVAL) {
this.lastBandwidth.shift();
}
let maxBandwidth = 0;
for (const bandwidth of this.lastBandwidth) {
if (bandwidth.value > maxBandwidth) {
maxBandwidth = bandwidth.value;
}
}
return maxBandwidth;
}
getSmoothInterval() {
return SMOOTH_INTERVAL;
}
getMeasureInterval() {
return MEASURE_INTERVAL;
}
}
exports.BandwidthApproximator = BandwidthApproximator;
},{}],2:[function(require,module,exports){
/**
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
if (!window.p2pml) {
window.p2pml = {};
}
window.p2pml.core = require("./index");
},{"./index":"p2p-media-loader-core"}],3:[function(require,module,exports){
"use strict";
/**
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const Debug = require("debug");
const stringly_typed_event_emitter_1 = require("./stringly-typed-event-emitter");
class HttpMediaManager extends stringly_typed_event_emitter_1.STEEmitter {
constructor(settings) {
super();
this.settings = settings;
this.xhrRequests = new Map();
this.failedSegments = new Map();
this.debug = Debug("p2pml:http-media-manager");
this.now = () => performance.now();
}
download(segment, downloadedPieces) {
if (this.isDownloading(segment)) {
return;
}
this.cleanTimedOutFailedSegments();
const segmentUrl = this.settings.segmentUrlBuilder
? this.settings.segmentUrlBuilder(segment)
: segment.url;
this.debug("http segment download", segmentUrl);
segment.requestUrl = segmentUrl;
const xhr = new XMLHttpRequest();
xhr.open("GET", segmentUrl, true);
xhr.responseType = "arraybuffer";
if (segment.range) {
xhr.setRequestHeader("Range", segment.range);
downloadedPieces = undefined; // TODO: process downloadedPieces for segments with range headers too
}
else if ((downloadedPieces !== undefined) && this.settings.httpUseRanges) {
let bytesDownloaded = 0;
for (const piece of downloadedPieces) {
bytesDownloaded += piece.byteLength;
}
xhr.setRequestHeader("Range", `bytes=${bytesDownloaded}-`);
this.debug("continue download from", bytesDownloaded);
}
else {
downloadedPieces = undefined;
}
this.setupXhrEvents(xhr, segment, downloadedPieces);
if (this.settings.xhrSetup) {
this.settings.xhrSetup(xhr, segmentUrl);
}
this.xhrRequests.set(segment.id, { xhr, segment });
xhr.send();
}
abort(segment) {
const request = this.xhrRequests.get(segment.id);
if (request) {
request.xhr.abort();
this.xhrRequests.delete(segment.id);
this.debug("http segment abort", segment.id);
}
}
isDownloading(segment) {
return this.xhrRequests.has(segment.id);
}
isFailed(segment) {
const time = this.failedSegments.get(segment.id);
return time !== undefined && time > this.now();
}
getActiveDownloads() {
return this.xhrRequests;
}
getActiveDownloadsCount() {
return this.xhrRequests.size;
}
destroy() {
this.xhrRequests.forEach(request => request.xhr.abort());
this.xhrRequests.clear();
}
setupXhrEvents(xhr, segment, downloadedPieces) {
let prevBytesLoaded = 0;
xhr.addEventListener("progress", (event) => {
const bytesLoaded = event.loaded - prevBytesLoaded;
this.emit("bytes-downloaded", bytesLoaded);
prevBytesLoaded = event.loaded;
});
xhr.addEventListener("load", async (event) => {
if ((event.target.status < 200) || (event.target.status >= 300)) {
this.segmentFailure(segment, event, xhr);
return;
}
let data = event.target.response;
if ((downloadedPieces !== undefined) && (event.target.status === 206)) {
let bytesDownloaded = 0;
for (const piece of downloadedPieces) {
bytesDownloaded += piece.byteLength;
}
const segmentData = new Uint8Array(bytesDownloaded + data.byteLength);
let offset = 0;
for (const piece of downloadedPieces) {
segmentData.set(new Uint8Array(piece), offset);
offset += piece.byteLength;
}
segmentData.set(new Uint8Array(data), offset);
data = segmentData.buffer;
}
await this.segmentDownloadFinished(segment, data, xhr);
});
xhr.addEventListener("error", (event) => {
this.segmentFailure(segment, event, xhr);
});
xhr.addEventListener("timeout", (event) => {
this.segmentFailure(segment, event, xhr);
});
}
async segmentDownloadFinished(segment, data, xhr) {
segment.responseUrl = xhr.responseURL === null ? undefined : xhr.responseURL;
if (this.settings.segmentValidator) {
try {
await this.settings.segmentValidator(Object.assign(Object.assign({}, segment), { data: data }), "http");
}
catch (error) {
this.debug("segment validator failed", error);
this.segmentFailure(segment, error, xhr);
return;
}
}
this.xhrRequests.delete(segment.id);
this.emit("segment-loaded", segment, data);
}
segmentFailure(segment, error, xhr) {
segment.responseUrl = xhr.responseURL === null ? undefined : xhr.responseURL;
this.xhrRequests.delete(segment.id);
this.failedSegments.set(segment.id, this.now() + this.settings.httpFailedSegmentTimeout);
this.emit("segment-error", segment, error);
}
cleanTimedOutFailedSegments() {
const now = this.now();
const candidates = [];
this.failedSegments.forEach((time, id) => {
if (time < now) {
candidates.push(id);
}
});
candidates.forEach(id => this.failedSegments.delete(id));
}
}
exports.HttpMediaManager = HttpMediaManager;
},{"./stringly-typed-event-emitter":9,"debug":"debug"}],4:[function(require,module,exports){
"use strict";
/**
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const Debug = require("debug");
const loader_interface_1 = require("./loader-interface");
const events_1 = require("events");
const http_media_manager_1 = require("./http-media-manager");
const p2p_media_manager_1 = require("./p2p-media-manager");
const media_peer_1 = require("./media-peer");
const bandwidth_approximator_1 = require("./bandwidth-approximator");
const segments_memory_storage_1 = require("./segments-memory-storage");
const getBrowserRTC = require("get-browser-rtc");
const Peer = require("simple-peer");
const defaultSettings = {
cachedSegmentExpiration: 5 * 60 * 1000,
cachedSegmentsCount: 30,
useP2P: true,
consumeOnly: false,
requiredSegmentsPriority: 1,
simultaneousHttpDownloads: 2,
httpDownloadProbability: 0.1,
httpDownloadProbabilityInterval: 1000,
httpDownloadProbabilitySkipIfNoPeers: false,
httpFailedSegmentTimeout: 10000,
httpDownloadMaxPriority: 20,
httpDownloadInitialTimeout: 0,
httpDownloadInitialTimeoutPerSegment: 4000,
httpUseRanges: false,
simultaneousP2PDownloads: 3,
p2pDownloadMaxPriority: 20,
p2pSegmentDownloadTimeout: 60000,
webRtcMaxMessageSize: 64 * 1024 - 1,
trackerAnnounce: ["wss://tracker.novage.com.ua", "wss://tracker.openwebtorrent.com"],
peerRequestsPerAnnounce: 10,
rtcConfig: Peer.config
};
class HybridLoader extends events_1.EventEmitter {
constructor(settings = {}) {
super();
this.debug = Debug("p2pml:hybrid-loader");
this.debugSegments = Debug("p2pml:hybrid-loader-segments");
this.segmentsQueue = [];
this.bandwidthApproximator = new bandwidth_approximator_1.BandwidthApproximator();
this.httpDownloadInitialTimeoutTimestamp = -Infinity;
this.processInitialSegmentTimeout = async () => {
if (this.httpRandomDownloadInterval === undefined) {
return; // Instance destroyed
}
if (this.masterSwarmId !== undefined) {
const storageSegments = await this.segmentsStorage.getSegmentsMap(this.masterSwarmId);
if (this.processSegmentsQueue(storageSegments) && !this.settings.consumeOnly) {
this.p2pManager.sendSegmentsMapToAll(this.createSegmentsMap(storageSegments));
}
}
if (this.httpDownloadInitialTimeoutTimestamp !== -Infinity) {
// Set one more timeout for a next segment
setTimeout(this.processInitialSegmentTimeout, this.settings.httpDownloadInitialTimeoutPerSegment);
}
};
this.downloadRandomSegmentOverHttp = async () => {
if (this.masterSwarmId === undefined ||
this.httpRandomDownloadInterval === undefined ||
this.httpDownloadInitialTimeoutTimestamp !== -Infinity ||
this.httpManager.getActiveDownloadsCount() >= this.settings.simultaneousHttpDownloads ||
(this.settings.httpDownloadProbabilitySkipIfNoPeers && this.p2pManager.getPeers().size === 0) ||
this.settings.consumeOnly) {
return;
}
const storageSegments = await this.segmentsStorage.getSegmentsMap(this.masterSwarmId);
const segmentsMap = this.p2pManager.getOvrallSegmentsMap();
const pendingQueue = this.segmentsQueue.filter(s => !this.p2pManager.isDownloading(s) &&
!this.httpManager.isDownloading(s) &&
!segmentsMap.has(s.id) &&
!this.httpManager.isFailed(s) &&
(s.priority <= this.settings.httpDownloadMaxPriority) &&
!storageSegments.has(s.id));
if (pendingQueue.length == 0) {
return;
}
if (Math.random() > this.settings.httpDownloadProbability * pendingQueue.length) {
return;
}
const segment = pendingQueue[Math.floor(Math.random() * pendingQueue.length)];
this.debugSegments("HTTP download (random)", segment.priority, segment.url);
this.httpManager.download(segment);
this.p2pManager.sendSegmentsMapToAll(this.createSegmentsMap(storageSegments));
};
this.onPieceBytesDownloaded = (method, bytes, peerId) => {
this.bandwidthApproximator.addBytes(bytes, this.now());
this.emit(loader_interface_1.Events.PieceBytesDownloaded, method, bytes, peerId);
};
this.onPieceBytesUploaded = (method, bytes, peerId) => {
this.emit(loader_interface_1.Events.PieceBytesUploaded, method, bytes, peerId);
};
this.onSegmentLoaded = async (segment, data, peerId) => {
this.debugSegments("segment loaded", segment.id, segment.url);
if (this.masterSwarmId === undefined) {
return;
}
segment.data = data;
segment.downloadBandwidth = this.bandwidthApproximator.getBandwidth(this.now());
await this.segmentsStorage.storeSegment(segment);
this.emit(loader_interface_1.Events.SegmentLoaded, segment, peerId);
let storageSegments;
storageSegments = (storageSegments === undefined ? await this.segmentsStorage.getSegmentsMap(this.masterSwarmId) : storageSegments);
this.processSegmentsQueue(storageSegments);
if (!this.settings.consumeOnly) {
this.p2pManager.sendSegmentsMapToAll(this.createSegmentsMap(storageSegments));
}
};
this.onSegmentError = async (segment, details, peerId) => {
this.debugSegments("segment error", segment.id, segment.url, peerId, details);
this.emit(loader_interface_1.Events.SegmentError, segment, details, peerId);
if (this.masterSwarmId !== undefined) {
const storageSegments = await this.segmentsStorage.getSegmentsMap(this.masterSwarmId);
if (this.processSegmentsQueue(storageSegments) && !this.settings.consumeOnly) {
this.p2pManager.sendSegmentsMapToAll(this.createSegmentsMap(storageSegments));
}
}
};
this.onPeerConnect = async (peer) => {
this.emit(loader_interface_1.Events.PeerConnect, peer);
if (!this.settings.consumeOnly && this.masterSwarmId !== undefined) {
this.p2pManager.sendSegmentsMap(peer.id, this.createSegmentsMap(await this.segmentsStorage.getSegmentsMap(this.masterSwarmId)));
}
};
this.onPeerClose = (peerId) => {
this.emit(loader_interface_1.Events.PeerClose, peerId);
};
this.onTrackerUpdate = async (data) => {
if (this.httpDownloadInitialTimeoutTimestamp !== -Infinity &&
data.incomplete !== undefined && data.incomplete <= 1) {
this.debugSegments("cancel initial HTTP download timeout - no peers");
this.httpDownloadInitialTimeoutTimestamp = -Infinity;
if (this.masterSwarmId !== undefined) {
const storageSegments = await this.segmentsStorage.getSegmentsMap(this.masterSwarmId);
if (this.processSegmentsQueue(storageSegments) && !this.settings.consumeOnly) {
this.p2pManager.sendSegmentsMapToAll(this.createSegmentsMap(storageSegments));
}
}
}
};
this.settings = Object.assign(Object.assign({}, defaultSettings), settings);
if (settings.bufferedSegmentsCount) {
if (settings.p2pDownloadMaxPriority === undefined) {
this.settings.p2pDownloadMaxPriority = settings.bufferedSegmentsCount;
}
if (settings.httpDownloadMaxPriority === undefined) {
this.settings.p2pDownloadMaxPriority = settings.bufferedSegmentsCount;
}
delete this.settings.bufferedSegmentsCount;
}
this.segmentsStorage = (this.settings.segmentsStorage === undefined
? new segments_memory_storage_1.SegmentsMemoryStorage(this.settings)
: this.settings.segmentsStorage);
this.debug("loader settings", this.settings);
this.httpManager = this.createHttpManager();
this.httpManager.on("segment-loaded", this.onSegmentLoaded);
this.httpManager.on("segment-error", this.onSegmentError);
this.httpManager.on("bytes-downloaded", (bytes) => this.onPieceBytesDownloaded("http", bytes));
this.p2pManager = this.createP2PManager();
this.p2pManager.on("segment-loaded", this.onSegmentLoaded);
this.p2pManager.on("segment-error", this.onSegmentError);
this.p2pManager.on("peer-data-updated", async () => {
if (this.masterSwarmId === undefined) {
return;
}
const storageSegments = await this.segmentsStorage.getSegmentsMap(this.masterSwarmId);
if (this.processSegmentsQueue(storageSegments) && !this.settings.consumeOnly) {
this.p2pManager.sendSegmentsMapToAll(this.createSegmentsMap(storageSegments));
}
});
this.p2pManager.on("bytes-downloaded", (bytes, peerId) => this.onPieceBytesDownloaded("p2p", bytes, peerId));
this.p2pManager.on("bytes-uploaded", (bytes, peerId) => this.onPieceBytesUploaded("p2p", bytes, peerId));
this.p2pManager.on("peer-connected", this.onPeerConnect);
this.p2pManager.on("peer-closed", this.onPeerClose);
this.p2pManager.on("tracker-update", this.onTrackerUpdate);
}
static isSupported() {
const browserRtc = getBrowserRTC();
return (browserRtc && (browserRtc.RTCPeerConnection.prototype.createDataChannel !== undefined));
}
createHttpManager() {
return new http_media_manager_1.HttpMediaManager(this.settings);
}
createP2PManager() {
return new p2p_media_manager_1.P2PMediaManager(this.segmentsStorage, this.settings);
}
async load(segments, streamSwarmId) {
if (this.httpRandomDownloadInterval === undefined) { // Do once on first call
this.httpRandomDownloadInterval = setInterval(this.downloadRandomSegmentOverHttp, this.settings.httpDownloadProbabilityInterval);
if (this.settings.httpDownloadInitialTimeout > 0 && this.settings.httpDownloadInitialTimeoutPerSegment > 0) {
// Initialize initial HTTP download timeout (i.e. download initial segments over P2P)
this.debugSegments("enable initial HTTP download timeout", this.settings.httpDownloadInitialTimeout, "per segment", this.settings.httpDownloadInitialTimeoutPerSegment);
this.httpDownloadInitialTimeoutTimestamp = this.now();
setTimeout(this.processInitialSegmentTimeout, this.settings.httpDownloadInitialTimeoutPerSegment + 100);
}
}
if (segments.length > 0) {
this.masterSwarmId = segments[0].masterSwarmId;
}
if (this.masterSwarmId !== undefined) {
this.p2pManager.setStreamSwarmId(streamSwarmId, this.masterSwarmId);
}
this.debug("load segments");
let updateSegmentsMap = false;
// stop all http requests and p2p downloads for segments that are not in the new load
for (const segment of this.segmentsQueue) {
if (!segments.find(f => f.url == segment.url)) {
this.debug("remove segment", segment.url);
if (this.httpManager.isDownloading(segment)) {
updateSegmentsMap = true;
this.httpManager.abort(segment);
}
else {
this.p2pManager.abort(segment);
}
this.emit(loader_interface_1.Events.SegmentAbort, segment);
}
}
if (this.debug.enabled) {
for (const segment of segments) {
if (!this.segmentsQueue.find(f => f.url == segment.url)) {
this.debug("add segment", segment.url);
}
}
}
this.segmentsQueue = segments;
if (this.masterSwarmId === undefined) {
return;
}
let storageSegments = await this.segmentsStorage.getSegmentsMap(this.masterSwarmId);
updateSegmentsMap = (this.processSegmentsQueue(storageSegments) || updateSegmentsMap);
if (await this.cleanSegmentsStorage()) {
storageSegments = await this.segmentsStorage.getSegmentsMap(this.masterSwarmId);
updateSegmentsMap = true;
}
if (updateSegmentsMap && !this.settings.consumeOnly) {
this.p2pManager.sendSegmentsMapToAll(this.createSegmentsMap(storageSegments));
}
}
async getSegment(id) {
return this.masterSwarmId === undefined
? undefined
: this.segmentsStorage.getSegment(id, this.masterSwarmId);
}
getSettings() {
return this.settings;
}
getDetails() {
return {
peerId: this.p2pManager.getPeerId()
};
}
async destroy() {
if (this.httpRandomDownloadInterval !== undefined) {
clearInterval(this.httpRandomDownloadInterval);
this.httpRandomDownloadInterval = undefined;
}
this.httpDownloadInitialTimeoutTimestamp = -Infinity;
this.segmentsQueue = [];
this.httpManager.destroy();
this.p2pManager.destroy();
this.masterSwarmId = undefined;
await this.segmentsStorage.destroy();
}
processSegmentsQueue(storageSegments) {
this.debugSegments("process segments queue. priority", this.segmentsQueue.length > 0 ? this.segmentsQueue[0].priority : 0);
if (this.masterSwarmId === undefined || this.segmentsQueue.length === 0) {
return false;
}
let updateSegmentsMap = false;
let segmentsMap;
let httpAllowed = true;
if (this.httpDownloadInitialTimeoutTimestamp !== -Infinity) {
let firstNotDownloadePriority;
for (const segment of this.segmentsQueue) {
if (!storageSegments.has(segment.id)) {
firstNotDownloadePriority = segment.priority;
break;
}
}
const httpTimeout = this.now() - this.httpDownloadInitialTimeoutTimestamp;
httpAllowed = (httpTimeout >= this.settings.httpDownloadInitialTimeout)
|| ((firstNotDownloadePriority !== undefined) && (httpTimeout > this.settings.httpDownloadInitialTimeoutPerSegment) && (firstNotDownloadePriority <= 0));
if (httpAllowed) {
this.debugSegments("cancel initial HTTP download timeout - timed out");
this.httpDownloadInitialTimeoutTimestamp = -Infinity;
}
}
for (let index = 0; index < this.segmentsQueue.length; index++) {
const segment = this.segmentsQueue[index];
if (storageSegments.has(segment.id) || this.httpManager.isDownloading(segment)) {
continue;
}
if (segment.priority <= this.settings.requiredSegmentsPriority && httpAllowed && !this.httpManager.isFailed(segment)) {
// Download required segments over HTTP
if (this.httpManager.getActiveDownloadsCount() >= this.settings.simultaneousHttpDownloads) {
// Not enough HTTP download resources. Abort one of the HTTP downloads.
for (let i = this.segmentsQueue.length - 1; i > index; i--) {
const segmentToAbort = this.segmentsQueue[i];
if (this.httpManager.isDownloading(segmentToAbort)) {
this.debugSegments("cancel HTTP download", segmentToAbort.priority, segmentToAbort.url);
this.httpManager.abort(segmentToAbort);
break;
}
}
}
if (this.httpManager.getActiveDownloadsCount() < this.settings.simultaneousHttpDownloads) {
// Abort P2P download of the required segment if any and force HTTP download
const downloadedPieces = this.p2pManager.abort(segment);
this.httpManager.download(segment, downloadedPieces);
this.debugSegments("HTTP download (priority)", segment.priority, segment.url);
updateSegmentsMap = true;
continue;
}
}
if (this.p2pManager.isDownloading(segment)) {
continue;
}
if (segment.priority <= this.settings.requiredSegmentsPriority) { // Download required segments over P2P
segmentsMap = segmentsMap ? segmentsMap : this.p2pManager.getOvrallSegmentsMap();
if (segmentsMap.get(segment.id) !== media_peer_1.MediaPeerSegmentStatus.Loaded) {
continue;
}
if (this.p2pManager.getActiveDownloadsCount() >= this.settings.simultaneousP2PDownloads) {
// Not enough P2P download resources. Abort one of the P2P downloads.
for (let i = this.segmentsQueue.length - 1; i > index; i--) {
const segmentToAbort = this.segmentsQueue[i];
if (this.p2pManager.isDownloading(segmentToAbort)) {
this.debugSegments("cancel P2P download", segmentToAbort.priority, segmentToAbort.url);
this.p2pManager.abort(segmentToAbort);
break;
}
}
}
if (this.p2pManager.getActiveDownloadsCount() < this.settings.simultaneousP2PDownloads) {
if (this.p2pManager.download(segment)) {
this.debugSegments("P2P download (priority)", segment.priority, segment.url);
continue;
}
}
continue;
}
if (this.p2pManager.getActiveDownloadsCount() < this.settings.simultaneousP2PDownloads &&
segment.priority <= this.settings.p2pDownloadMaxPriority) {
if (this.p2pManager.download(segment)) {
this.debugSegments("P2P download", segment.priority, segment.url);
}
}
}
return updateSegmentsMap;
}
getStreamSwarmId(segment) {
return segment.streamId === undefined ? segment.masterSwarmId : `${segment.masterSwarmId}+${segment.streamId}`;
}
createSegmentsMap(storageSegments) {
const segmentsMap = {};
const addSegmentToMap = (segment, status) => {
const streamSwarmId = this.getStreamSwarmId(segment);
const segmentId = segment.sequence;
let segmentsIdsAndStatuses = segmentsMap[streamSwarmId];
if (segmentsIdsAndStatuses === undefined) {
segmentsIdsAndStatuses = ["", []];
segmentsMap[streamSwarmId] = segmentsIdsAndStatuses;
}
const segmentsStatuses = segmentsIdsAndStatuses[1];
segmentsIdsAndStatuses[0] += ((segmentsStatuses.length == 0) ? segmentId : `|${segmentId}`);
segmentsStatuses.push(status);
};
for (const storageSegment of storageSegments.values()) {
addSegmentToMap(storageSegment.segment, media_peer_1.MediaPeerSegmentStatus.Loaded);
}
for (const download of this.httpManager.getActiveDownloads().values()) {
addSegmentToMap(download.segment, media_peer_1.MediaPeerSegmentStatus.LoadingByHttp);
}
return segmentsMap;
}
async cleanSegmentsStorage() {
if (this.masterSwarmId === undefined) {
return false;
}
return this.segmentsStorage.clean(this.masterSwarmId, (id) => this.segmentsQueue.find(queueSegment => queueSegment.id === id) !== undefined);
}
now() {
return performance.now();
}
}
exports.HybridLoader = HybridLoader;
},{"./bandwidth-approximator":1,"./http-media-manager":3,"./loader-interface":5,"./media-peer":6,"./p2p-media-manager":7,"./segments-memory-storage":8,"debug":"debug","events":"events","get-browser-rtc":18,"simple-peer":44}],5:[function(require,module,exports){
"use strict";
/**
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
var Events;
(function (Events) {
/**
* Emitted when segment has been downloaded.
* Args: segment
*/
Events["SegmentLoaded"] = "segment_loaded";
/**
* Emitted when an error occurred while loading the segment.
* Args: segment, error
*/
Events["SegmentError"] = "segment_error";
/**
* Emitted for each segment that does not hit into a new segments queue when the load() method is called.
* Args: segment
*/
Events["SegmentAbort"] = "segment_abort";
/**
* Emitted when a peer is connected.
* Args: peer
*/
Events["PeerConnect"] = "peer_connect";
/**
* Emitted when a peer is disconnected.
* Args: peerId
*/
Events["PeerClose"] = "peer_close";
/**
* Emitted when a segment piece has been downloaded.
* Args: method (can be "http" or "p2p" only), bytes
*/
Events["PieceBytesDownloaded"] = "piece_bytes_downloaded";
/**
* Emitted when a segment piece has been uploaded.
* Args: method (can be "p2p" only), bytes
*/
Events["PieceBytesUploaded"] = "piece_bytes_uploaded";
})(Events = exports.Events || (exports.Events = {}));
},{}],6:[function(require,module,exports){
"use strict";
/**
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const Debug = require("debug");
const stringly_typed_event_emitter_1 = require("./stringly-typed-event-emitter");
const buffer_1 = require("buffer");
var MediaPeerCommands;
(function (MediaPeerCommands) {
MediaPeerCommands[MediaPeerCommands["SegmentData"] = 0] = "SegmentData";
MediaPeerCommands[MediaPeerCommands["SegmentAbsent"] = 1] = "SegmentAbsent";
MediaPeerCommands[MediaPeerCommands["SegmentsMap"] = 2] = "SegmentsMap";
MediaPeerCommands[MediaPeerCommands["SegmentRequest"] = 3] = "SegmentRequest";
MediaPeerCommands[MediaPeerCommands["CancelSegmentRequest"] = 4] = "CancelSegmentRequest";
})(MediaPeerCommands || (MediaPeerCommands = {}));
var MediaPeerSegmentStatus;
(function (MediaPeerSegmentStatus) {
MediaPeerSegmentStatus[MediaPeerSegmentStatus["Loaded"] = 0] = "Loaded";
MediaPeerSegmentStatus[MediaPeerSegmentStatus["LoadingByHttp"] = 1] = "LoadingByHttp";
})(MediaPeerSegmentStatus = exports.MediaPeerSegmentStatus || (exports.MediaPeerSegmentStatus = {}));
class DownloadingSegment {
constructor(id, size) {
this.id = id;
this.size = size;
this.bytesDownloaded = 0;
this.pieces = [];
}
}
class MediaPeer extends stringly_typed_event_emitter_1.STEEmitter {
constructor(peer, settings) {
super();
this.peer = peer;
this.settings = settings;
this.remoteAddress = "";
this.downloadingSegmentId = null;
this.downloadingSegment = null;
this.segmentsMap = new Map();
this.debug = Debug("p2pml:media-peer");
this.timer = null;
this.onPeerConnect = () => {
this.debug("peer connect", this.id, this);
this.remoteAddress = this.peer.remoteAddress;
this.emit("connect", this);
};
this.onPeerClose = () => {
this.debug("peer close", this.id, this);
this.terminateSegmentRequest();
this.emit("close", this);
};
this.onPeerError = (error) => {
this.debug("peer error", this.id, error, this);
};
this.onPeerData = (data) => {
const command = this.getJsonCommand(data);
if (command == null) {
this.receiveSegmentPiece(data);
return;
}
if (this.downloadingSegment) {
this.debug("peer segment download is interrupted by a command", this.id, this);
const segmentId = this.downloadingSegment.id;
this.terminateSegmentRequest();
this.emit("segment-error", this, segmentId, "Segment download is interrupted by a command");
return;
}
this.debug("peer receive command", this.id, command, this);
switch (command.c) {
case MediaPeerCommands.SegmentsMap:
this.segmentsMap = this.createSegmentsMap(command.m);
this.emit("data-updated");
break;
case MediaPeerCommands.SegmentRequest:
this.emit("segment-request", this, command.i);
break;
case MediaPeerCommands.SegmentData:
if (this.downloadingSegmentId === command.i) {
this.downloadingSegment = new DownloadingSegment(command.i, command.s);
this.cancelResponseTimeoutTimer();
}
break;
case MediaPeerCommands.SegmentAbsent:
if (this.downloadingSegmentId === command.i) {
this.terminateSegmentRequest();
this.segmentsMap.delete(command.i);
this.emit("segment-absent", this, command.i);
}
break;
case MediaPeerCommands.CancelSegmentRequest:
// TODO: peer stop sending buffer
break;
default:
break;
}
};
this.peer.on("connect", this.onPeerConnect);
this.peer.on("close", this.onPeerClose);
this.peer.on("error", this.onPeerError);
this.peer.on("data", this.onPeerData);
this.id = peer.id;
}
receiveSegmentPiece(data) {
if (!this.downloadingSegment) {
// The segment was not requested or canceled
this.debug("peer segment not requested", this.id, this);
return;
}
this.downloadingSegment.bytesDownloaded += data.byteLength;
this.downloadingSegment.pieces.push(data);
this.emit("bytes-downloaded", this, data.byteLength);
const segmentId = this.downloadingSegment.id;
if (this.downloadingSegment.bytesDownloaded == this.downloadingSegment.size) {
const segmentData = new Uint8Array(this.downloadingSegment.size);
let offset = 0;
for (const piece of this.downloadingSegment.pieces) {
segmentData.set(new Uint8Array(piece), offset);
offset += piece.byteLength;
}
this.debug("peer segment download done", this.id, segmentId, this);
this.terminateSegmentRequest();
this.emit("segment-loaded", this, segmentId, segmentData.buffer);
}
else if (this.downloadingSegment.bytesDownloaded > this.downloadingSegment.size) {
this.debug("peer segment download bytes mismatch", this.id, segmentId, this);
this.terminateSegmentRequest();
this.emit("segment-error", this, segmentId, "Too many bytes received for segment");
}
}
getJsonCommand(data) {
const bytes = new Uint8Array(data);
// Serialized JSON string check by first, second and last characters: '{" .... }'
if (bytes[0] == 123 && bytes[1] == 34 && bytes[data.byteLength - 1] == 125) {
try {
return JSON.parse(new TextDecoder().decode(data));
}
catch (_a) {
}
}
return null;
}
createSegmentsMap(segments) {
if (segments == undefined || !(segments instanceof Object)) {
return new Map();
}
const segmentsMap = new Map();
for (const streamSwarmId of Object.keys(segments)) {
const swarmData = segments[streamSwarmId];
if (!(swarmData instanceof Array) ||
(swarmData.length !== 2) ||
(typeof swarmData[0] !== "string") ||
!(swarmData[1] instanceof Array)) {
return new Map();
}
const segmentsIds = swarmData[0].split("|");
const segmentsStatuses = swarmData[1];
if (segmentsIds.length !== segmentsStatuses.length) {
return new Map();
}
for (let i = 0; i < segmentsIds.length; i++) {
const segmentStatus = segmentsStatuses[i];
if (typeof segmentStatus !== "number" || MediaPeerSegmentStatus[segmentStatus] === undefined) {
return new Map();
}
segmentsMap.set(`${streamSwarmId}+${segmentsIds[i]}`, segmentStatus);
}
}
return segmentsMap;
}
sendCommand(command) {
this.debug("peer send command", this.id, command, this);
this.peer.write(JSON.stringify(command));
}
destroy() {
this.debug("peer destroy", this.id, this);
this.terminateSegmentRequest();
this.peer.destroy();
}
getDownloadingSegmentId() {
return this.downloadingSegmentId;
}
getSegmentsMap() {
return this.segmentsMap;
}
sendSegmentsMap(segmentsMap) {
this.sendCommand({ c: MediaPeerCommands.SegmentsMap, m: segmentsMap });
}
sendSegmentData(segmentId, data) {
this.sendCommand({
c: MediaPeerCommands.SegmentData,
i: segmentId,
s: data.byteLength
});
let bytesLeft = data.byteLength;
while (bytesLeft > 0) {
const bytesToSend = (bytesLeft >= this.settings.webRtcMaxMessageSize ? this.settings.webRtcMaxMessageSize : bytesLeft);
const buffer = buffer_1.Buffer.from(data, data.byteLength - bytesLeft, bytesToSend);
this.peer.write(buffer);
bytesLeft -= bytesToSend;
}
this.emit("bytes-uploaded", this, data.byteLength);
}
sendSegmentAbsent(segmentId) {
this.sendCommand({ c: MediaPeerCommands.SegmentAbsent, i: segmentId });
}
requestSegment(segmentId) {
if (this.downloadingSegmentId) {
throw new Error("A segment is already downloading: " + this.downloadingSegmentId);
}
this.sendCommand({ c: MediaPeerCommands.SegmentRequest, i: segmentId });
this.downloadingSegmentId = segmentId;
this.runResponseTimeoutTimer();
}
cancelSegmentRequest() {
let downloadingSegment;
if (this.downloadingSegmentId) {
const segmentId = this.downloadingSegmentId;
downloadingSegment = this.downloadingSegment ? this.downloadingSegment.pieces : undefined;
this.terminateSegmentRequest();
this.sendCommand({ c: MediaPeerCommands.CancelSegmentRequest, i: segmentId });
}
return downloadingSegment;
}
runResponseTimeoutTimer() {
this.timer = setTimeout(() => {
this.timer = null;
if (!this.downloadingSegmentId) {
return;
}
const segmentId = this.downloadingSegmentId;
this.cancelSegmentRequest();
this.emit("segment-timeout", this, segmentId); // TODO: send peer not responding event
}, this.settings.p2pSegmentDownloadTimeout);
}
cancelResponseTimeoutTimer() {
if (this.timer) {
clearTimeout(this.timer);
this.timer = null;
}
}
terminateSegmentRequest() {
this.downloadingSegmentId = null;
this.downloadingSegment = null;
this.cancelResponseTimeoutTimer();
}
}
exports.MediaPeer = MediaPeer;
},{"./stringly-typed-event-emitter":9,"buffer":16,"debug":"debug"}],7:[function(require,module,exports){
"use strict";
/**
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const Debug = require("debug");
const Client = require("bittorrent-tracker/client");
const stringly_typed_event_emitter_1 = require("./stringly-typed-event-emitter");
const media_peer_1 = require("./media-peer");
const buffer_1 = require("buffer");
const sha1 = require("sha.js/sha1");
const index_1 = require("./index");
const PEER_PROTOCOL_VERSION = 2;
const PEER_ID_VERSION_STRING = index_1.version.replace(/\d*./g, v => `0${parseInt(v, 10) % 100}`.slice(-2)).slice(0, 4);
const PEER_ID_VERSION_PREFIX = `-WW${PEER_ID_VERSION_STRING}-`; // Using WebTorrent client ID in order to not be banned by websocket trackers
class PeerSegmentRequest {
constructor(peerId, segment) {
this.peerId = peerId;
this.segment = segment;
}
}
function generatePeerId() {
const PEER_ID_SYMBOLS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
const PEER_ID_LENGTH = 20;
let peerId = PEER_ID_VERSION_PREFIX;
for (let i = 0; i < PEER_ID_LENGTH - PEER_ID_VERSION_PREFIX.length; i++) {
peerId += PEER_ID_SYMBOLS.charAt(Math.floor(Math.random() * PEER_ID_SYMBOLS.length));
}
return new TextEncoder().encode(peerId).buffer;
}
class P2PMediaManager extends stringly_typed_event_emitter_1.STEEmitter {
constructor(sementsStorage, settings) {
super();
this.sementsStorage = sementsStorage;
this.settings = settings;
this.trackerClient = null;
this.peers = new Map();
this.peerCandidates = new Map();
this.peerSegmentRequests = new Map();
this.streamSwarmId = null;
this.debug = Debug("p2pml:p2p-media-manager");
this.pendingTrackerClient = null;
this.onTrackerError = (error) => {
this.debug("tracker error", error);
};
this.onTrackerWarning = (warning) => {
this.debug("tracker warning", warning);
};
this.onTrackerUpdate = (data) => {
this.debug("tracker update", data);
this.emit("tracker-update", data);
};
this.onTrackerPeer = (trackerPeer) => {
this.debug("tracker peer", trackerPeer.id, trackerPeer);
if (this.peers.has(trackerPeer.id)) {
this.debug("tracker peer already connected", trackerPeer.id, trackerPeer);
trackerPeer.destroy();
return;
}
const peer = new media_peer_1.MediaPeer(trackerPeer, this.settings);
peer.on("connect", this.onPeerConnect);
peer.on("close", this.onPeerClose);
peer.on("data-updated", this.onPeerDataUpdated);
peer.on("segment-request", this.onSegmentRequest);
peer.on("segment-loaded", this.onSegmentLoaded);
peer.on("segment-absent", this.onSegmentAbsent);
peer.on("segment-error", this.onSegmentError);
peer.on("segment-timeout", this.onSegmentTimeout);
peer.on("bytes-downloaded", this.onPieceBytesDownloaded);
peer.on("bytes-uploaded", this.onPieceBytesUploaded);
let peerCandidatesById = this.peerCandidates.get(peer.id);
if (!peerCandidatesById) {
peerCandidatesById = [];
this.peerCandidates.set(peer.id, peerCandidatesById);
}
peerCandidatesById.push(peer);
};
this.onPieceBytesDownloaded = (peer, bytes) => {
this.emit("bytes-downloaded", bytes, peer.id);
};
this.onPieceBytesUploaded = (peer, bytes) => {
this.emit("bytes-uploaded", bytes, peer.id);
};
this.onPeerConnect = (peer) => {
const connectedPeer = this.peers.get(peer.id);
if (connectedPeer) {
this.debug("tracker peer already connected (in peer connect)", peer.id, peer);
peer.destroy();
return;
}
// First peer with the ID connected
this.peers.set(peer.id, peer);
// Destroy all other peer candidates
const peerCandidatesById = this.peerCandidates.get(peer.id);
if (peerCandidatesById) {
for (const peerCandidate of peerCandidatesById) {
if (peerCandidate != peer) {
peerCandidate.destroy();
}
}
this.peerCandidates.delete(peer.id);
}
this.emit("peer-connected", { id: peer.id, remoteAddress: peer.remoteAddress });
};
this.onPeerClose = (peer) => {
if (this.peers.get(peer.id) != peer) {
// Try to delete the peer candidate
const peerCandidatesById = this.peerCandidates.get(peer.id);
if (!peerCandidatesById) {
return;
}
const index = peerCandidatesById.indexOf(peer);
if (index != -1) {
peerCandidatesById.splice(index, 1);
}
if (peerCandidatesById.length == 0) {
this.peerCandidates.delete(peer.id);
}
return;
}
for (const [key, value] of this.peerSegmentRequests) {
if (value.peerId == peer.id) {
this.peerSegmentRequests.delete(key);
}
}
this.peers.delete(peer.id);
this.emit("peer-data-updated");
this.emit("peer-closed", peer.id);
};
this.onPeerDataUpdated = () => {
this.emit("peer-data-updated");
};
this.onSegmentRequest = async (peer, segmentId) => {
if (this.masterSwarmId === undefined) {
return;
}
const segment = await this.sementsStorage.getSegment(segmentId, this.masterSwarmId);
if (segment) {
peer.sendSegmentData(segmentId, segment.data);
}
else {
peer.sendSegmentAbsent(segmentId);
}
};
this.onSegmentLoaded = async (peer, segmentId, data) => {
const peerSegmentRequest = this.peerSegmentRequests.get(segmentId);
if (!peerSegmentRequest) {
return;
}
const segment = peerSegmentRequest.segment;
if (this.settings.segmentValidator) {
try {
await this.settings.segmentValidator(Object.assign(Object.assign({}, segment), { data: data }), "p2p", peer.id);
}
catch (error) {
this.debug("segment validator failed", error);
this.peerSegmentRequests.delete(segmentId);
this.emit("segment-error", segment, error, peer.id);
this.onPeerClose(peer);
return;
}
}
this.peerSegmentRequests.delete(segmentId);
this.emit("segment-loaded", segment, data, peer.id);
};
this.onSegmentAbsent = (peer, segmentId) => {
this.peerSegmentRequests.delete(segmentId);
this.emit("peer-data-updated");
};
this.onSegmentError = (peer, segmentId, description) => {
const peerSegmentRequest = this.peerSegmentRequests.get(segmentId);
if (peerSegmentRequest) {
this.peerSegmentRequests.delete(segmentId);
this.emit("segment-error", peerSegmentRequest.segment, description, peer.id);
}
};
this.onSegmentTimeout = (peer, segmentId) => {
const peerSegmentRequest = this.peerSegmentRequests.get(segmentId);
if (peerSegmentRequest) {
this.peerSegmentRequests.delete(segmentId);
peer.destroy();
if (this.peers.delete(peerSegmentRequest.peerId)) {
this.emit("peer-data-updated");
}
}
};
this.peerId = settings.useP2P ? generatePeerId() : new ArrayBuffer(0);
if (this.debug.enabled) {
this.debug("peer ID", this.getPeerId(), new TextDecoder().decode(this.peerId));
}
}
getPeers() {
return this.peers;
}
getPeerId() {
return buffer_1.Buffer.from(this.peerId).toString("hex");
}
async setStreamSwarmId(streamSwarmId, masterSwarmId) {
if (this.streamSwarmId === streamSwarmId) {
return;
}
this.destroy(true);
this.streamSwarmId = streamSwarmId;
this.masterSwarmId = masterSwarmId;
this.debug("stream swarm ID", this.streamSwarmId);
this.pendingTrackerClient = {
isDestroyed: false
};
const pendingTrackerClient = this.pendingTrackerClient;
// TODO: native browser 'crypto.subtle' implementation doesn't work in Chrome in insecure pages
// TODO: Edge doesn't support SHA-1. Change to SHA-256 once Edge support is required.
// const infoHash = await crypto.subtle.digest("SHA-1", new TextEncoder().encode(PEER_PROTOCOL_VERSION + this.streamSwarmId));
const infoHash = new sha1().update(PEER_PROTOCOL_VERSION + this.streamSwarmId).digest();
// destroy may be called while waiting for the hash to be calculated
if (!pendingTrackerClient.isDestroyed) {
this.pendingTrackerClient = null;
this.createClient(infoHash);
}
else if (this.trackerClient != null) {
this.trackerClient.destroy();
this.trackerClient = null;
}
}
createClient(infoHash) {
if (!this.settings.useP2P) {
return;
}
const clientOptions = {
infoHash: buffer_1.Buffer.from(infoHash, 0, 20),
peerId: buffer_1.Buffer.from(this.peerId, 0, 20),
announce: this.settings.trackerAnnounce,
rtcConfig: this.settings.rtcConfig,
port: 6881,
getAnnounceOpts: () => {
return { numwant: this.settings.peerRequestsPerAnnounce };
}
};
let oldTrackerClient = this.trackerClient;
this.trackerClient = new Client(clientOptions);
this.trackerClient.on("error", this.onTrackerError);
this.trackerClient.on("warning", this.onTrackerWarning);
this.trackerClient.on("update", this.onTrackerUpdate);
this.trackerClient.on("peer", this.onTrackerPeer);
this.trackerClient.start();
if (oldTrackerClient != null) {
oldTrackerClient.destroy();
oldTrackerClient = null;
}
}
download(segment) {
if (this.isDownloading(segment)) {
return false;
}
const candidates = [];
for (const peer of this.peers.values()) {
if ((peer.getDownloadingSegmentId() == null) &&
(peer.getSegmentsMap().get(segment.id) === media_peer_1.MediaPeerSegmentStatus.Loaded)) {
candidates.push(peer);
}
}
if (candidates.length === 0) {
return false;
}
const peer = candidates[Math.floor(Math.random() * candidates.length)];
peer.requestSegment(segment.id);
this.peerSegmentRequests.set(segment.id, new PeerSegmentRequest(peer.id, segment));
return true;
}
abort(segment) {
let downloadingSegment;
const peerSegmentRequest = this.peerSegmentRequests.get(segment.id);
if (peerSegmentRequest) {
const peer = this.peers.get(peerSegmentRequest.peerId);
if (peer) {
downloadingSegment = peer.cancelSegmentRequest();
}
this.peerSegmentRequests.delete(segment.id);
}
return downloadingSegment;
}
isDownloading(segment) {
return this.peerSegmentRequests.has(segment.id);
}
getActiveDownloadsCount() {
return this.peerSegmentRequests.size;
}
destroy(swarmChange = false) {
this.streamSwarmId = null;
if (this.trackerClient) {
this.trackerClient.stop();
if (swarmChange) {
// Don't destroy trackerClient to reuse its WebSocket connection to the tracker server
this.trackerClient.removeAllListeners("error");
this.trackerClient.removeAllListeners("warning");
this.trackerClient.removeAllListeners("update");
this.trackerClient.removeAllListeners("peer");
}
else {
this.trackerClient.destroy();
this.trackerClient = null;
}
}
if (this.pendingTrackerClient) {
this.pendingTrackerClient.isDestroyed = true;
this.pendingTrackerClient = null;
}
this.peers.forEach(peer => peer.destroy());
this.peers.clear();
this.peerSegmentRequests.clear();
for (const peerCandidateById of this.peerCandidates.values()) {
for (const peerCandidate of peerCandidateById) {
peerCandidate.destroy();
}
}
this.peerCandidates.clear();
}
sendSegmentsMapToAll(segmentsMap) {
this.peers.forEach(peer => peer.sendSegmentsMap(segmentsMap));
}
sendSegmentsMap(peerId, segmentsMap) {
const peer = this.peers.get(peerId);
if (peer) {
peer.sendSegmentsMap(segmentsMap);
}
}
getOvrallSegmentsMap() {
const overallSegmentsMap = new Map();
for (const peer of this.peers.values()) {
for (const [segmentId, segmentStatus] of peer.getSegmentsMap()) {
if (segmentStatus === media_peer_1.MediaPeerSegmentStatus.Loaded) {
overallSegmentsMap.set(segmentId, media_peer_1.MediaPeerSegmentStatus.Loaded);
}
else if (!overallSegmentsMap.get(segmentId)) {
overallSegmentsMap.set(segmentId, media_peer_1.MediaPeerSegmentStatus.LoadingByHttp);
}
}
}
return overallSegmentsMap;
}
}
exports.P2PMediaManager = P2PMediaManager;
},{"./index":"p2p-media-loader-core","./media-peer":6,"./stringly-typed-event-emitter":9,"bittorrent-tracker/client":11,"buffer":16,"debug":"debug","sha.js/sha1":43}],8:[function(require,module,exports){
"use strict";
/**
* Copyright 2019 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
class SegmentsMemoryStorage {
constructor(settings) {
this.settings = settings;
this.cache = new Map();
}
async storeSegment(segment) {
this.cache.set(segment.id, { segment, lastAccessed: performance.now() });
}
async getSegmentsMap(masterSwarmId) {
return this.cache;
}
async getSegment(id, masterSwarmId) {
const cacheItem = this.cache.get(id);
if (cacheItem === undefined) {
return undefined;
}
cacheItem.lastAccessed = performance.now();
return cacheItem.segment;
}
async hasSegment(id, masterSwarmId) {
return this.cache.has(id);
}
async clean(masterSwarmId, lockedSementsfilter) {
const segmentsToDelete = [];
const remainingSegments = [];
// Delete old segments
const now = performance.now();
for (const cachedSegment of this.cache.values()) {
if (now - cachedSegment.lastAccessed > this.settings.cachedSegmentExpiration) {
segmentsToDelete.push(cachedSegment.segment.id);
}
else {
remainingSegments.push(cachedSegment);
}
}
// Delete segments over cached count
let countOverhead = remainingSegments.length - this.settings.cachedSegmentsCount;
if (countOverhead > 0) {
remainingSegments.sort((a, b) => a.lastAccessed - b.lastAccessed);
for (const cachedSegment of remainingSegments) {
if ((lockedSementsfilter === undefined) || !lockedSementsfilter(cachedSegment.segment.id)) {
segmentsToDelete.push(cachedSegment.segment.id);
countOverhead--;
if (countOverhead == 0) {
break;
}
}
}
}
segmentsToDelete.forEach(id => this.cache.delete(id));
return segmentsToDelete.length > 0;
}
async destroy() {
this.cache.clear();
}
}
exports.SegmentsMemoryStorage = SegmentsMemoryStorage;
},{}],9:[function(require,module,exports){
"use strict";
/**
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const events_1 = require("events");
class STEEmitter extends events_1.EventEmitter {
on(event, listener) { return super.on(event, listener); }
emit(event, ...args) { return super.emit(event, ...args); }
}
exports.STEEmitter = STEEmitter;
},{"events":"events"}],10:[function(require,module,exports){
'use strict'
exports.byteLength = byteLength
exports.toByteArray = toByteArray
exports.fromByteArray = fromByteArray
var lookup = []
var revLookup = []
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
for (var i = 0, len = code.length; i < len; ++i) {
lookup[i] = code[i]
revLookup[code.charCodeAt(i)] = i
}
// Support decoding URL-safe base64 strings, as Node.js does.
// See: https://en.wikipedia.org/wiki/Base64#URL_applications
revLookup['-'.charCodeAt(0)] = 62
revLookup['_'.charCodeAt(0)] = 63
function getLens (b64) {
var len = b64.length
if (len % 4 > 0) {
throw new Error('Invalid string. Length must be a multiple of 4')
}
// Trim off extra bytes after placeholder bytes are found
// See: https://github.com/beatgammit/base64-js/issues/42
var validLen = b64.indexOf('=')
if (validLen === -1) validLen = len
var placeHoldersLen = validLen === len
? 0
: 4 - (validLen % 4)
return [validLen, placeHoldersLen]
}
// base64 is 4/3 + up to two characters of the original data
function byteLength (b64) {
var lens = getLens(b64)
var validLen = lens[0]
var placeHoldersLen = lens[1]
return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}
function _byteLength (b64, validLen, placeHoldersLen) {
return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}
function toByteArray (b64) {
var tmp
var lens = getLens(b64)
var validLen = lens[0]
var placeHoldersLen = lens[1]
var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
var curByte = 0
// if there are placeholders, only get up to the last complete 4 chars
var len = placeHoldersLen > 0
? validLen - 4
: validLen
var i
for (i = 0; i < len; i += 4) {
tmp =
(revLookup[b64.charCodeAt(i)] << 18) |
(revLookup[b64.charCodeAt(i + 1)] << 12) |
(revLookup[b64.charCodeAt(i + 2)] << 6) |
revLookup[b64.charCodeAt(i + 3)]
arr[curByte++] = (tmp >> 16) & 0xFF
arr[curByte++] = (tmp >> 8) & 0xFF
arr[curByte++] = tmp & 0xFF
}
if (placeHoldersLen === 2) {
tmp =
(revLookup[b64.charCodeAt(i)] << 2) |
(revLookup[b64.charCodeAt(i + 1)] >> 4)
arr[curByte++] = tmp & 0xFF
}
if (placeHoldersLen === 1) {
tmp =
(revLookup[b64.charCodeAt(i)] << 10) |
(revLookup[b64.charCodeAt(i + 1)] << 4) |
(revLookup[b64.charCodeAt(i + 2)] >> 2)
arr[curByte++] = (tmp >> 8) & 0xFF
arr[curByte++] = tmp & 0xFF
}
return arr
}
function tripletToBase64 (num) {
return lookup[num >> 18 & 0x3F] +
lookup[num >> 12 & 0x3F] +
lookup[num >> 6 & 0x3F] +
lookup[num & 0x3F]
}
function encodeChunk (uint8, start, end) {
var tmp
var output = []
for (var i = start; i < end; i += 3) {
tmp =
((uint8[i] << 16) & 0xFF0000) +
((uint8[i + 1] << 8) & 0xFF00) +
(uint8[i + 2] & 0xFF)
output.push(tripletToBase64(tmp))
}
return output.join('')
}
function fromByteArray (uint8) {
var tmp
var len = uint8.length
var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
var parts = []
var maxChunkLength = 16383 // must be multiple of 3
// go through the array every three bytes, we'll deal with trailing stuff later
for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
parts.push(encodeChunk(
uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
))
}
// pad the end with zeros, but make sure to not forget the extra bytes
if (extraBytes === 1) {
tmp = uint8[len - 1]
parts.push(
lookup[tmp >> 2] +
lookup[(tmp << 4) & 0x3F] +
'=='
)
} else if (extraBytes === 2) {
tmp = (uint8[len - 2] << 8) + uint8[len - 1]
parts.push(
lookup[tmp >> 10] +
lookup[(tmp >> 4) & 0x3F] +
lookup[(tmp << 2) & 0x3F] +
'='
)
}
return parts.join('')
}
},{}],11:[function(require,module,exports){
(function (process,Buffer){
const debug = require('debug')('bittorrent-tracker:client')
const EventEmitter = require('events')
const once = require('once')
const parallel = require('run-parallel')
const Peer = require('simple-peer')
const uniq = require('uniq')
const common = require('./lib/common')
const HTTPTracker = require('./lib/client/http-tracker') // empty object in browser
const UDPTracker = require('./lib/client/udp-tracker') // empty object in browser
const WebSocketTracker = require('./lib/client/websocket-tracker')
/**
* BitTorrent tracker client.
*
* Find torrent peers, to help a torrent client participate in a torrent swarm.
*
* @param {Object} opts options object
* @param {string|Buffer} opts.infoHash torrent info hash
* @param {string|Buffer} opts.peerId peer id
* @param {string|Array.<string>} opts.announce announce
* @param {number} opts.port torrent client listening port
* @param {function} opts.getAnnounceOpts callback to provide data to tracker
* @param {number} opts.rtcConfig RTCPeerConnection configuration object
* @param {number} opts.userAgent User-Agent header for http requests
* @param {number} opts.wrtc custom webrtc impl (useful in node.js)
*/
class Client extends EventEmitter {
constructor (opts = {}) {
super()
if (!opts.peerId) throw new Error('Option `peerId` is required')
if (!opts.infoHash) throw new Error('Option `infoHash` is required')
if (!opts.announce) throw new Error('Option `announce` is required')
if (!process.browser && !opts.port) throw new Error('Option `port` is required')
this.peerId = typeof opts.peerId === 'string'
? opts.peerId
: opts.peerId.toString('hex')
this._peerIdBuffer = Buffer.from(this.peerId, 'hex')
this._peerIdBinary = this._peerIdBuffer.toString('binary')
this.infoHash = typeof opts.infoHash === 'string'
? opts.infoHash.toLowerCase()
: opts.infoHash.toString('hex')
this._infoHashBuffer = Buffer.from(this.infoHash, 'hex')
this._infoHashBinary = this._infoHashBuffer.toString('binary')
debug('new client %s', this.infoHash)
this.destroyed = false
this._port = opts.port
this._getAnnounceOpts = opts.getAnnounceOpts
this._rtcConfig = opts.rtcConfig
this._userAgent = opts.userAgent
// Support lazy 'wrtc' module initialization
// See: https://github.com/webtorrent/webtorrent-hybrid/issues/46
this._wrtc = typeof opts.wrtc === 'function' ? opts.wrtc() : opts.wrtc
let announce = typeof opts.announce === 'string'
? [opts.announce]
: opts.announce == null ? [] : opts.announce
// Remove trailing slash from trackers to catch duplicates
announce = announce.map(announceUrl => {
announceUrl = announceUrl.toString()
if (announceUrl[announceUrl.length - 1] === '/') {
announceUrl = announceUrl.substring(0, announceUrl.length - 1)
}
return announceUrl
})
announce = uniq(announce)
const webrtcSupport = this._wrtc !== false && (!!this._wrtc || Peer.WEBRTC_SUPPORT)
const nextTickWarn = err => {
process.nextTick(() => {
this.emit('warning', err)
})
}
this._trackers = announce
.map(announceUrl => {
let parsedUrl
try {
parsedUrl = new URL(announceUrl)
} catch (err) {
nextTickWarn(new Error(`Invalid tracker URL: ${announceUrl}`))
return null
}
const port = parsedUrl.port
if (port < 0 || port > 65535) {
nextTickWarn(new Error(`Invalid tracker port: ${announceUrl}`))
return null
}
const protocol = parsedUrl.protocol
if ((protocol === 'http:' || protocol === 'https:') &&
typeof HTTPTracker === 'function') {
return new HTTPTracker(this, announceUrl)
} else if (protocol === 'udp:' && typeof UDPTracker === 'function') {
return new UDPTracker(this, announceUrl)
} else if ((protocol === 'ws:' || protocol === 'wss:') && webrtcSupport) {
// Skip ws:// trackers on https:// sites because they throw SecurityError
if (protocol === 'ws:' && typeof window !== 'undefined' &&
window.location.protocol === 'https:') {
nextTickWarn(new Error(`Unsupported tracker protocol: ${announceUrl}`))
return null
}
return new WebSocketTracker(this, announceUrl)
} else {
nextTickWarn(new Error(`Unsupported tracker protocol: ${announceUrl}`))
return null
}
})
.filter(Boolean)
}
/**
* Send a `start` announce to the trackers.
* @param {Object} opts
* @param {number=} opts.uploaded
* @param {number=} opts.downloaded
* @param {number=} opts.left (if not set, calculated automatically)
*/
start (opts) {
opts = this._defaultAnnounceOpts(opts)
opts.event = 'started'
debug('send `start` %o', opts)
this._announce(opts)
// start announcing on intervals
this._trackers.forEach(tracker => {
tracker.setInterval()
})
}
/**
* Send a `stop` announce to the trackers.
* @param {Object} opts
* @param {number=} opts.uploaded
* @param {number=} opts.downloaded
* @param {number=} opts.numwant
* @param {number=} opts.left (if not set, calculated automatically)
*/
stop (opts) {
opts = this._defaultAnnounceOpts(opts)
opts.event = 'stopped'
debug('send `stop` %o', opts)
this._announce(opts)
}
/**
* Send a `complete` announce to the trackers.
* @param {Object} opts
* @param {number=} opts.uploaded
* @param {number=} opts.downloaded
* @param {number=} opts.numwant
* @param {number=} opts.left (if not set, calculated automatically)
*/
complete (opts) {
if (!opts) opts = {}
opts = this._defaultAnnounceOpts(opts)
opts.event = 'completed'
debug('send `complete` %o', opts)
this._announce(opts)
}
/**
* Send a `update` announce to the trackers.
* @param {Object} opts
* @param {number=} opts.uploaded
* @param {number=} opts.downloaded
* @param {number=} opts.numwant
* @param {number=} opts.left (if not set, calculated automatically)
*/
update (opts) {
opts = this._defaultAnnounceOpts(opts)
if (opts.event) delete opts.event
debug('send `update` %o', opts)
this._announce(opts)
}
_announce (opts) {
this._trackers.forEach(tracker => {
// tracker should not modify `opts` object, it's passed to all trackers
tracker.announce(opts)
})
}
/**
* Send a scrape request to the trackers.
* @param {Object} opts
*/
scrape (opts) {
debug('send `scrape`')
if (!opts) opts = {}
this._trackers.forEach(tracker => {
// tracker should not modify `opts` object, it's passed to all trackers
tracker.scrape(opts)
})
}
setInterval (intervalMs) {
debug('setInterval %d', intervalMs)
this._trackers.forEach(tracker => {
tracker.setInterval(intervalMs)
})
}
destroy (cb) {
if (this.destroyed) return
this.destroyed = true
debug('destroy')
const tasks = this._trackers.map(tracker => cb => {
tracker.destroy(cb)
})
parallel(tasks, cb)
this._trackers = []
this._getAnnounceOpts = null
}
_defaultAnnounceOpts (opts = {}) {
if (opts.numwant == null) opts.numwant = common.DEFAULT_ANNOUNCE_PEERS
if (opts.uploaded == null) opts.uploaded = 0
if (opts.downloaded == null) opts.downloaded = 0
if (this._getAnnounceOpts) opts = Object.assign({}, opts, this._getAnnounceOpts())
return opts
}
}
/**
* Simple convenience function to scrape a tracker for an info hash without needing to
* create a Client, pass it a parsed torrent, etc. Support scraping a tracker for multiple
* torrents at the same time.
* @params {Object} opts
* @param {string|Array.<string>} opts.infoHash
* @param {string} opts.announce
* @param {function} cb
*/
Client.scrape = (opts, cb) => {
cb = once(cb)
if (!opts.infoHash) throw new Error('Option `infoHash` is required')
if (!opts.announce) throw new Error('Option `announce` is required')
const clientOpts = Object.assign({}, opts, {
infoHash: Array.isArray(opts.infoHash) ? opts.infoHash[0] : opts.infoHash,
peerId: Buffer.from('01234567890123456789'), // dummy value
port: 6881 // dummy value
})
const client = new Client(clientOpts)
client.once('error', cb)
client.once('warning', cb)
let len = Array.isArray(opts.infoHash) ? opts.infoHash.length : 1
const results = {}
client.on('scrape', data => {
len -= 1
results[data.infoHash] = data
if (len === 0) {
client.destroy()
const keys = Object.keys(results)
if (keys.length === 1) {
cb(null, results[keys[0]])
} else {
cb(null, results)
}
}
})
opts.infoHash = Array.isArray(opts.infoHash)
? opts.infoHash.map(infoHash => {
return Buffer.from(infoHash, 'hex')
})
: Buffer.from(opts.infoHash, 'hex')
client.scrape({ infoHash: opts.infoHash })
return client
}
module.exports = Client
}).call(this,require('_process'),require("buffer").Buffer)
},{"./lib/client/http-tracker":15,"./lib/client/udp-tracker":15,"./lib/client/websocket-tracker":13,"./lib/common":14,"_process":23,"buffer":16,"debug":"debug","events":"events","once":22,"run-parallel":40,"simple-peer":44,"uniq":47}],12:[function(require,module,exports){
const EventEmitter = require('events')
class Tracker extends EventEmitter {
constructor (client, announceUrl) {
super()
this.client = client
this.announceUrl = announceUrl
this.interval = null
this.destroyed = false
}
setInterval (intervalMs) {
if (intervalMs == null) intervalMs = this.DEFAULT_ANNOUNCE_INTERVAL
clearInterval(this.interval)
if (intervalMs) {
this.interval = setInterval(() => {
this.announce(this.client._defaultAnnounceOpts())
}, intervalMs)
if (this.interval.unref) this.interval.unref()
}
}
}
module.exports = Tracker
},{"events":"events"}],13:[function(require,module,exports){
const debug = require('debug')('bittorrent-tracker:websocket-tracker')
const Peer = require('simple-peer')
const randombytes = require('randombytes')
const Socket = require('simple-websocket')
const common = require('../common')
const Tracker = require('./tracker')
// Use a socket pool, so tracker clients share WebSocket objects for the same server.
// In practice, WebSockets are pretty slow to establish, so this gives a nice performance
// boost, and saves browser resources.
const socketPool = {}
const RECONNECT_MINIMUM = 10 * 1000
const RECONNECT_MAXIMUM = 30 * 60 * 1000
const RECONNECT_VARIANCE = 2 * 60 * 1000
const OFFER_TIMEOUT = 50 * 1000
class WebSocketTracker extends Tracker {
constructor (client, announceUrl, opts) {
super(client, announceUrl)
debug('new websocket tracker %s', announceUrl)
this.peers = {} // peers (offer id -> peer)
this.socket = null
this.reconnecting = false
this.retries = 0
this.reconnectTimer = null
// Simple boolean flag to track whether the socket has received data from
// the websocket server since the last time socket.send() was called.
this.expectingResponse = false
this._openSocket()
}
announce (opts) {
if (this.destroyed || this.reconnecting) return
if (!this.socket.connected) {
this.socket.once('connect', () => {
this.announce(opts)
})
return
}
const params = Object.assign({}, opts, {
action: 'announce',
info_hash: this.client._infoHashBinary,
peer_id: this.client._peerIdBinary
})
if (this._trackerId) params.trackerid = this._trackerId
if (opts.event === 'stopped' || opts.event === 'completed') {
// Don't include offers with 'stopped' or 'completed' event
this._send(params)
} else {
// Limit the number of offers that are generated, since it can be slow
const numwant = Math.min(opts.numwant, 10)
this._generateOffers(numwant, offers => {
params.numwant = numwant
params.offers = offers
this._send(params)
})
}
}
scrape (opts) {
if (this.destroyed || this.reconnecting) return
if (!this.socket.connected) {
this.socket.once('connect', () => {
this.scrape(opts)
})
return
}
const infoHashes = (Array.isArray(opts.infoHash) && opts.infoHash.length > 0)
? opts.infoHash.map(infoHash => {
return infoHash.toString('binary')
})
: (opts.infoHash && opts.infoHash.toString('binary')) || this.client._infoHashBinary
const params = {
action: 'scrape',
info_hash: infoHashes
}
this._send(params)
}
destroy (cb = noop) {
if (this.destroyed) return cb(null)
this.destroyed = true
clearInterval(this.interval)
clearTimeout(this.reconnectTimer)
// Destroy peers
for (const peerId in this.peers) {
const peer = this.peers[peerId]
clearTimeout(peer.trackerTimeout)
peer.destroy()
}
this.peers = null
if (this.socket) {
this.socket.removeListener('connect', this._onSocketConnectBound)
this.socket.removeListener('data', this._onSocketDataBound)
this.socket.removeListener('close', this._onSocketCloseBound)
this.socket.removeListener('error', this._onSocketErrorBound)
this.socket = null
}
this._onSocketConnectBound = null
this._onSocketErrorBound = null
this._onSocketDataBound = null
this._onSocketCloseBound = null
if (socketPool[this.announceUrl]) {
socketPool[this.announceUrl].consumers -= 1
}
// Other instances are using the socket, so there's nothing left to do here
if (socketPool[this.announceUrl].consumers > 0) return cb()
let socket = socketPool[this.announceUrl]
delete socketPool[this.announceUrl]
socket.on('error', noop) // ignore all future errors
socket.once('close', cb)
// If there is no data response expected, destroy immediately.
if (!this.expectingResponse) return destroyCleanup()
// Otherwise, wait a short time for potential responses to come in from the
// server, then force close the socket.
var timeout = setTimeout(destroyCleanup, common.DESTROY_TIMEOUT)
// But, if a response comes from the server before the timeout fires, do cleanup
// right away.
socket.once('data', destroyCleanup)
function destroyCleanup () {
if (timeout) {
clearTimeout(timeout)
timeout = null
}
socket.removeListener('data', destroyCleanup)
socket.destroy()
socket = null
}
}
_openSocket () {
this.destroyed = false
if (!this.peers) this.peers = {}
this._onSocketConnectBound = () => {
this._onSocketConnect()
}
this._onSocketErrorBound = err => {
this._onSocketError(err)
}
this._onSocketDataBound = data => {
this._onSocketData(data)
}
this._onSocketCloseBound = () => {
this._onSocketClose()
}
this.socket = socketPool[this.announceUrl]
if (this.socket) {
socketPool[this.announceUrl].consumers += 1
if (this.socket.connected) {
this._onSocketConnectBound()
}
} else {
this.socket = socketPool[this.announceUrl] = new Socket(this.announceUrl)
this.socket.consumers = 1
this.socket.once('connect', this._onSocketConnectBound)
}
this.socket.on('data', this._onSocketDataBound)
this.socket.once('close', this._onSocketCloseBound)
this.socket.once('error', this._onSocketErrorBound)
}
_onSocketConnect () {
if (this.destroyed) return
if (this.reconnecting) {
this.reconnecting = false
this.retries = 0
this.announce(this.client._defaultAnnounceOpts())
}
}
_onSocketData (data) {
if (this.destroyed) return
this.expectingResponse = false
try {
data = JSON.parse(data)
} catch (err) {
this.client.emit('warning', new Error('Invalid tracker response'))
return
}
if (data.action === 'announce') {
this._onAnnounceResponse(data)
} else if (data.action === 'scrape') {
this._onScrapeResponse(data)
} else {
this._onSocketError(new Error(`invalid action in WS response: ${data.action}`))
}
}
_onAnnounceResponse (data) {
if (data.info_hash !== this.client._infoHashBinary) {
debug(
'ignoring websocket data from %s for %s (looking for %s: reused socket)',
this.announceUrl, common.binaryToHex(data.info_hash), this.client.infoHash
)
return
}
if (data.peer_id && data.peer_id === this.client._peerIdBinary) {
// ignore offers/answers from this client
return
}
debug(
'received %s from %s for %s',
JSON.stringify(data), this.announceUrl, this.client.infoHash
)
const failure = data['failure reason']
if (failure) return this.client.emit('warning', new Error(failure))
const warning = data['warning message']
if (warning) this.client.emit('warning', new Error(warning))
const interval = data.interval || data['min interval']
if (interval) this.setInterval(interval * 1000)
const trackerId = data['tracker id']
if (trackerId) {
// If absent, do not discard previous trackerId value
this._trackerId = trackerId
}
if (data.complete != null) {
const response = Object.assign({}, data, {
announce: this.announceUrl,
infoHash: common.binaryToHex(data.info_hash)
})
this.client.emit('update', response)
}
let peer
if (data.offer && data.peer_id) {
debug('creating peer (from remote offer)')
peer = this._createPeer()
peer.id = common.binaryToHex(data.peer_id)
peer.once('signal', answer => {
const params = {
action: 'announce',
info_hash: this.client._infoHashBinary,
peer_id: this.client._peerIdBinary,
to_peer_id: data.peer_id,
answer,
offer_id: data.offer_id
}
if (this._trackerId) params.trackerid = this._trackerId
this._send(params)
})
peer.signal(data.offer)
this.client.emit('peer', peer)
}
if (data.answer && data.peer_id) {
const offerId = common.binaryToHex(data.offer_id)
peer = this.peers[offerId]
if (peer) {
peer.id = common.binaryToHex(data.peer_id)
peer.signal(data.answer)
this.client.emit('peer', peer)
clearTimeout(peer.trackerTimeout)
peer.trackerTimeout = null
delete this.peers[offerId]
} else {
debug(`got unexpected answer: ${JSON.stringify(data.answer)}`)
}
}
}
_onScrapeResponse (data) {
data = data.files || {}
const keys = Object.keys(data)
if (keys.length === 0) {
this.client.emit('warning', new Error('invalid scrape response'))
return
}
keys.forEach(infoHash => {
// TODO: optionally handle data.flags.min_request_interval
// (separate from announce interval)
const response = Object.assign(data[infoHash], {
announce: this.announceUrl,
infoHash: common.binaryToHex(infoHash)
})
this.client.emit('scrape', response)
})
}
_onSocketClose () {
if (this.destroyed) return
this.destroy()
this._startReconnectTimer()
}
_onSocketError (err) {
if (this.destroyed) return
this.destroy()
// errors will often happen if a tracker is offline, so don't treat it as fatal
this.client.emit('warning', err)
this._startReconnectTimer()
}
_startReconnectTimer () {
const ms = Math.floor(Math.random() * RECONNECT_VARIANCE) + Math.min(Math.pow(2, this.retries) * RECONNECT_MINIMUM, RECONNECT_MAXIMUM)
this.reconnecting = true
clearTimeout(this.reconnectTimer)
this.reconnectTimer = setTimeout(() => {
this.retries++
this._openSocket()
}, ms)
if (this.reconnectTimer.unref) this.reconnectTimer.unref()
debug('reconnecting socket in %s ms', ms)
}
_send (params) {
if (this.destroyed) return
this.expectingResponse = true
const message = JSON.stringify(params)
debug('send %s', message)
this.socket.send(message)
}
_generateOffers (numwant, cb) {
const self = this
const offers = []
debug('generating %s offers', numwant)
for (let i = 0; i < numwant; ++i) {
generateOffer()
}
checkDone()
function generateOffer () {
const offerId = randombytes(20).toString('hex')
debug('creating peer (from _generateOffers)')
const peer = self.peers[offerId] = self._createPeer({ initiator: true })
peer.once('signal', offer => {
offers.push({
offer,
offer_id: common.hexToBinary(offerId)
})
checkDone()
})
peer.trackerTimeout = setTimeout(() => {
debug('tracker timeout: destroying peer')
peer.trackerTimeout = null
delete self.peers[offerId]
peer.destroy()
}, OFFER_TIMEOUT)
if (peer.trackerTimeout.unref) peer.trackerTimeout.unref()
}
function checkDone () {
if (offers.length === numwant) {
debug('generated %s offers', numwant)
cb(offers)
}
}
}
_createPeer (opts) {
const self = this
opts = Object.assign({
trickle: false,
config: self.client._rtcConfig,
wrtc: self.client._wrtc
}, opts)
const peer = new Peer(opts)
peer.once('error', onError)
peer.once('connect', onConnect)
return peer
// Handle peer 'error' events that are fired *before* the peer is emitted in
// a 'peer' event.
function onError (err) {
self.client.emit('warning', new Error(`Connection error: ${err.message}`))
peer.destroy()
}
// Once the peer is emitted in a 'peer' event, then it's the consumer's
// responsibility to listen for errors, so the listeners are removed here.
function onConnect () {
peer.removeListener('error', onError)
peer.removeListener('connect', onConnect)
}
}
}
WebSocketTracker.prototype.DEFAULT_ANNOUNCE_INTERVAL = 30 * 1000 // 30 seconds
// Normally this shouldn't be accessed but is occasionally useful
WebSocketTracker._socketPool = socketPool
function noop () {}
module.exports = WebSocketTracker
},{"../common":14,"./tracker":12,"debug":"debug","randombytes":24,"simple-peer":44,"simple-websocket":45}],14:[function(require,module,exports){
(function (Buffer){
/**
* Functions/constants needed by both the client and server.
*/
exports.DEFAULT_ANNOUNCE_PEERS = 50
exports.MAX_ANNOUNCE_PEERS = 82
exports.binaryToHex = function (str) {
if (typeof str !== 'string') {
str = String(str)
}
return Buffer.from(str, 'binary').toString('hex')
}
exports.hexToBinary = function (str) {
if (typeof str !== 'string') {
str = String(str)
}
return Buffer.from(str, 'hex').toString('binary')
}
var config = require('./common-node')
Object.assign(exports, config)
}).call(this,require("buffer").Buffer)
},{"./common-node":15,"buffer":16}],15:[function(require,module,exports){
},{}],16:[function(require,module,exports){
(function (Buffer){
/*!
* The buffer module from node.js, for the browser.
*
* @author Feross Aboukhadijeh <https://feross.org>
* @license MIT
*/
/* eslint-disable no-proto */
'use strict'
var base64 = require('base64-js')
var ieee754 = require('ieee754')
var customInspectSymbol =
(typeof Symbol === 'function' && typeof Symbol.for === 'function')
? Symbol.for('nodejs.util.inspect.custom')
: null
exports.Buffer = Buffer
exports.SlowBuffer = SlowBuffer
exports.INSPECT_MAX_BYTES = 50
var K_MAX_LENGTH = 0x7fffffff
exports.kMaxLength = K_MAX_LENGTH
/**
* If `Buffer.TYPED_ARRAY_SUPPORT`:
* === true Use Uint8Array implementation (fastest)
* === false Print warning and recommend using `buffer` v4.x which has an Object
* implementation (most compatible, even IE6)
*
* Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
* Opera 11.6+, iOS 4.2+.
*
* We report that the browser does not support typed arrays if the are not subclassable
* using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
* (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
* for __proto__ and has a buggy typed array implementation.
*/
Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
typeof console.error === 'function') {
console.error(
'This browser lacks typed array (Uint8Array) support which is required by ' +
'`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
)
}
function typedArraySupport () {
// Can typed array instances can be augmented?
try {
var arr = new Uint8Array(1)
var proto = { foo: function () { return 42 } }
Object.setPrototypeOf(proto, Uint8Array.prototype)
Object.setPrototypeOf(arr, proto)
return arr.foo() === 42
} catch (e) {
return false
}
}
Object.defineProperty(Buffer.prototype, 'parent', {
enumerable: true,
get: function () {
if (!Buffer.isBuffer(this)) return undefined
return this.buffer
}
})
Object.defineProperty(Buffer.prototype, 'offset', {
enumerable: true,
get: function () {
if (!Buffer.isBuffer(this)) return undefined
return this.byteOffset
}
})
function createBuffer (length) {
if (length > K_MAX_LENGTH) {
throw new RangeError('The value "' + length + '" is invalid for option "size"')
}
// Return an augmented `Uint8Array` instance
var buf = new Uint8Array(length)
Object.setPrototypeOf(buf, Buffer.prototype)
return buf
}
/**
* The Buffer constructor returns instances of `Uint8Array` that have their
* prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
* `Uint8Array`, so the returned instances will have all the node `Buffer` methods
* and the `Uint8Array` methods. Square bracket notation works as expected -- it
* returns a single octet.
*
* The `Uint8Array` prototype remains unmodified.
*/
function Buffer (arg, encodingOrOffset, length) {
// Common case.
if (typeof arg === 'number') {
if (typeof encodingOrOffset === 'string') {
throw new TypeError(
'The "string" argument must be of type string. Received type number'
)
}
return allocUnsafe(arg)
}
return from(arg, encodingOrOffset, length)
}
// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
if (typeof Symbol !== 'undefined' && Symbol.species != null &&
Buffer[Symbol.species] === Buffer) {
Object.defineProperty(Buffer, Symbol.species, {
value: null,
configurable: true,
enumerable: false,
writable: false
})
}
Buffer.poolSize = 8192 // not used by this implementation
function from (value, encodingOrOffset, length) {
if (typeof value === 'string') {
return fromString(value, encodingOrOffset)
}
if (ArrayBuffer.isView(value)) {
return fromArrayLike(value)
}
if (value == null) {
throw new TypeError(
'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
'or Array-like Object. Received type ' + (typeof value)
)
}
if (isInstance(value, ArrayBuffer) ||
(value && isInstance(value.buffer, ArrayBuffer))) {
return fromArrayBuffer(value, encodingOrOffset, length)
}
if (typeof value === 'number') {
throw new TypeError(
'The "value" argument must not be of type number. Received type number'
)
}
var valueOf = value.valueOf && value.valueOf()
if (valueOf != null && valueOf !== value) {
return Buffer.from(valueOf, encodingOrOffset, length)
}
var b = fromObject(value)
if (b) return b
if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
typeof value[Symbol.toPrimitive] === 'function') {
return Buffer.from(
value[Symbol.toPrimitive]('string'), encodingOrOffset, length
)
}
throw new TypeError(
'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
'or Array-like Object. Received type ' + (typeof value)
)
}
/**
* Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
* if value is a number.
* Buffer.from(str[, encoding])
* Buffer.from(array)
* Buffer.from(buffer)
* Buffer.from(arrayBuffer[, byteOffset[, length]])
**/
Buffer.from = function (value, encodingOrOffset, length) {
return from(value, encodingOrOffset, length)
}
// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
// https://github.com/feross/buffer/pull/148
Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype)
Object.setPrototypeOf(Buffer, Uint8Array)
function assertSize (size) {
if (typeof size !== 'number') {
throw new TypeError('"size" argument must be of type number')
} else if (size < 0) {
throw new RangeError('The value "' + size + '" is invalid for option "size"')
}
}
function alloc (size, fill, encoding) {
assertSize(size)
if (size <= 0) {
return createBuffer(size)
}
if (fill !== undefined) {
// Only pay attention to encoding if it's a string. This
// prevents accidentally sending in a number that would
// be interpretted as a start offset.
return typeof encoding === 'string'
? createBuffer(size).fill(fill, encoding)
: createBuffer(size).fill(fill)
}
return createBuffer(size)
}
/**
* Creates a new filled Buffer instance.
* alloc(size[, fill[, encoding]])
**/
Buffer.alloc = function (size, fill, encoding) {
return alloc(size, fill, encoding)
}
function allocUnsafe (size) {
assertSize(size)
return createBuffer(size < 0 ? 0 : checked(size) | 0)
}
/**
* Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
* */
Buffer.allocUnsafe = function (size) {
return allocUnsafe(size)
}
/**
* Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
*/
Buffer.allocUnsafeSlow = function (size) {
return allocUnsafe(size)
}
function fromString (string, encoding) {
if (typeof encoding !== 'string' || encoding === '') {
encoding = 'utf8'
}
if (!Buffer.isEncoding(encoding)) {
throw new TypeError('Unknown encoding: ' + encoding)
}
var length = byteLength(string, encoding) | 0
var buf = createBuffer(length)
var actual = buf.write(string, encoding)
if (actual !== length) {
// Writing a hex string, for example, that contains invalid characters will
// cause everything after the first invalid character to be ignored. (e.g.
// 'abxxcd' will be treated as 'ab')
buf = buf.slice(0, actual)
}
return buf
}
function fromArrayLike (array) {
var length = array.length < 0 ? 0 : checked(array.length) | 0
var buf = createBuffer(length)
for (var i = 0; i < length; i += 1) {
buf[i] = array[i] & 255
}
return buf
}
function fromArrayBuffer (array, byteOffset, length) {
if (byteOffset < 0 || array.byteLength < byteOffset) {
throw new RangeError('"offset" is outside of buffer bounds')
}
if (array.byteLength < byteOffset + (length || 0)) {
throw new RangeError('"length" is outside of buffer bounds')
}
var buf
if (byteOffset === undefined && length === undefined) {
buf = new Uint8Array(array)
} else if (length === undefined) {
buf = new Uint8Array(array, byteOffset)
} else {
buf = new Uint8Array(array, byteOffset, length)
}
// Return an augmented `Uint8Array` instance
Object.setPrototypeOf(buf, Buffer.prototype)
return buf
}
function fromObject (obj) {
if (Buffer.isBuffer(obj)) {
var len = checked(obj.length) | 0
var buf = createBuffer(len)
if (buf.length === 0) {
return buf
}
obj.copy(buf, 0, 0, len)
return buf
}
if (obj.length !== undefined) {
if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
return createBuffer(0)
}
return fromArrayLike(obj)
}
if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
return fromArrayLike(obj.data)
}
}
function checked (length) {
// Note: cannot use `length < K_MAX_LENGTH` here because that fails when
// length is NaN (which is otherwise coerced to zero.)
if (length >= K_MAX_LENGTH) {
throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
}
return length | 0
}
function SlowBuffer (length) {
if (+length != length) { // eslint-disable-line eqeqeq
length = 0
}
return Buffer.alloc(+length)
}
Buffer.isBuffer = function isBuffer (b) {
return b != null && b._isBuffer === true &&
b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
}
Buffer.compare = function compare (a, b) {
if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
throw new TypeError(
'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
)
}
if (a === b) return 0
var x = a.length
var y = b.length
for (var i = 0, len = Math.min(x, y); i < len; ++i) {
if (a[i] !== b[i]) {
x = a[i]
y = b[i]
break
}
}
if (x < y) return -1
if (y < x) return 1
return 0
}
Buffer.isEncoding = function isEncoding (encoding) {
switch (String(encoding).toLowerCase()) {
case 'hex':
case 'utf8':
case 'utf-8':
case 'ascii':
case 'latin1':
case 'binary':
case 'base64':
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return true
default:
return false
}
}
Buffer.concat = function concat (list, length) {
if (!Array.isArray(list)) {
throw new TypeError('"list" argument must be an Array of Buffers')
}
if (list.length === 0) {
return Buffer.alloc(0)
}
var i
if (length === undefined) {
length = 0
for (i = 0; i < list.length; ++i) {
length += list[i].length
}
}
var buffer = Buffer.allocUnsafe(length)
var pos = 0
for (i = 0; i < list.length; ++i) {
var buf = list[i]
if (isInstance(buf, Uint8Array)) {
buf = Buffer.from(buf)
}
if (!Buffer.isBuffer(buf)) {
throw new TypeError('"list" argument must be an Array of Buffers')
}
buf.copy(buffer, pos)
pos += buf.length
}
return buffer
}
function byteLength (string, encoding) {
if (Buffer.isBuffer(string)) {
return string.length
}
if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
return string.byteLength
}
if (typeof string !== 'string') {
throw new TypeError(
'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
'Received type ' + typeof string
)
}
var len = string.length
var mustMatch = (arguments.length > 2 && arguments[2] === true)
if (!mustMatch && len === 0) return 0
// Use a for loop to avoid recursion
var loweredCase = false
for (;;) {
switch (encoding) {
case 'ascii':
case 'latin1':
case 'binary':
return len
case 'utf8':
case 'utf-8':
return utf8ToBytes(string).length
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return len * 2
case 'hex':
return len >>> 1
case 'base64':
return base64ToBytes(string).length
default:
if (loweredCase) {
return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
}
encoding = ('' + encoding).toLowerCase()
loweredCase = true
}
}
}
Buffer.byteLength = byteLength
function slowToString (encoding, start, end) {
var loweredCase = false
// No need to verify that "this.length <= MAX_UINT32" since it's a read-only
// property of a typed array.
// This behaves neither like String nor Uint8Array in that we set start/end
// to their upper/lower bounds if the value passed is out of range.
// undefined is handled specially as per ECMA-262 6th Edition,
// Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
if (start === undefined || start < 0) {
start = 0
}
// Return early if start > this.length. Done here to prevent potential uint32
// coercion fail below.
if (start > this.length) {
return ''
}
if (end === undefined || end > this.length) {
end = this.length
}
if (end <= 0) {
return ''
}
// Force coersion to uint32. This will also coerce falsey/NaN values to 0.
end >>>= 0
start >>>= 0
if (end <= start) {
return ''
}
if (!encoding) encoding = 'utf8'
while (true) {
switch (encoding) {
case 'hex':
return hexSlice(this, start, end)
case 'utf8':
case 'utf-8':
return utf8Slice(this, start, end)
case 'ascii':
return asciiSlice(this, start, end)
case 'latin1':
case 'binary':
return latin1Slice(this, start, end)
case 'base64':
return base64Slice(this, start, end)
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return utf16leSlice(this, start, end)
default:
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
encoding = (encoding + '').toLowerCase()
loweredCase = true
}
}
}
// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
// reliably in a browserify context because there could be multiple different
// copies of the 'buffer' package in use. This method works even for Buffer
// instances that were created from another copy of the `buffer` package.
// See: https://github.com/feross/buffer/issues/154
Buffer.prototype._isBuffer = true
function swap (b, n, m) {
var i = b[n]
b[n] = b[m]
b[m] = i
}
Buffer.prototype.swap16 = function swap16 () {
var len = this.length
if (len % 2 !== 0) {
throw new RangeError('Buffer size must be a multiple of 16-bits')
}
for (var i = 0; i < len; i += 2) {
swap(this, i, i + 1)
}
return this
}
Buffer.prototype.swap32 = function swap32 () {
var len = this.length
if (len % 4 !== 0) {
throw new RangeError('Buffer size must be a multiple of 32-bits')
}
for (var i = 0; i < len; i += 4) {
swap(this, i, i + 3)
swap(this, i + 1, i + 2)
}
return this
}
Buffer.prototype.swap64 = function swap64 () {
var len = this.length
if (len % 8 !== 0) {
throw new RangeError('Buffer size must be a multiple of 64-bits')
}
for (var i = 0; i < len; i += 8) {
swap(this, i, i + 7)
swap(this, i + 1, i + 6)
swap(this, i + 2, i + 5)
swap(this, i + 3, i + 4)
}
return this
}
Buffer.prototype.toString = function toString () {
var length = this.length
if (length === 0) return ''
if (arguments.length === 0) return utf8Slice(this, 0, length)
return slowToString.apply(this, arguments)
}
Buffer.prototype.toLocaleString = Buffer.prototype.toString
Buffer.prototype.equals = function equals (b) {
if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
if (this === b) return true
return Buffer.compare(this, b) === 0
}
Buffer.prototype.inspect = function inspect () {
var str = ''
var max = exports.INSPECT_MAX_BYTES
str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
if (this.length > max) str += ' ... '
return '<Buffer ' + str + '>'
}
if (customInspectSymbol) {
Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect
}
Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
if (isInstance(target, Uint8Array)) {
target = Buffer.from(target, target.offset, target.byteLength)
}
if (!Buffer.isBuffer(target)) {
throw new TypeError(
'The "target" argument must be one of type Buffer or Uint8Array. ' +
'Received type ' + (typeof target)
)
}
if (start === undefined) {
start = 0
}
if (end === undefined) {
end = target ? target.length : 0
}
if (thisStart === undefined) {
thisStart = 0
}
if (thisEnd === undefined) {
thisEnd = this.length
}
if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
throw new RangeError('out of range index')
}
if (thisStart >= thisEnd && start >= end) {
return 0
}
if (thisStart >= thisEnd) {
return -1
}
if (start >= end) {
return 1
}
start >>>= 0
end >>>= 0
thisStart >>>= 0
thisEnd >>>= 0
if (this === target) return 0
var x = thisEnd - thisStart
var y = end - start
var len = Math.min(x, y)
var thisCopy = this.slice(thisStart, thisEnd)
var targetCopy = target.slice(start, end)
for (var i = 0; i < len; ++i) {
if (thisCopy[i] !== targetCopy[i]) {
x = thisCopy[i]
y = targetCopy[i]
break
}
}
if (x < y) return -1
if (y < x) return 1
return 0
}
// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
//
// Arguments:
// - buffer - a Buffer to search
// - val - a string, Buffer, or number
// - byteOffset - an index into `buffer`; will be clamped to an int32
// - encoding - an optional encoding, relevant is val is a string
// - dir - true for indexOf, false for lastIndexOf
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
// Empty buffer means no match
if (buffer.length === 0) return -1
// Normalize byteOffset
if (typeof byteOffset === 'string') {
encoding = byteOffset
byteOffset = 0
} else if (byteOffset > 0x7fffffff) {
byteOffset = 0x7fffffff
} else if (byteOffset < -0x80000000) {
byteOffset = -0x80000000
}
byteOffset = +byteOffset // Coerce to Number.
if (numberIsNaN(byteOffset)) {
// byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
byteOffset = dir ? 0 : (buffer.length - 1)
}
// Normalize byteOffset: negative offsets start from the end of the buffer
if (byteOffset < 0) byteOffset = buffer.length + byteOffset
if (byteOffset >= buffer.length) {
if (dir) return -1
else byteOffset = buffer.length - 1
} else if (byteOffset < 0) {
if (dir) byteOffset = 0
else return -1
}
// Normalize val
if (typeof val === 'string') {
val = Buffer.from(val, encoding)
}
// Finally, search either indexOf (if dir is true) or lastIndexOf
if (Buffer.isBuffer(val)) {
// Special case: looking for empty string/buffer always fails
if (val.length === 0) {
return -1
}
return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
} else if (typeof val === 'number') {
val = val & 0xFF // Search for a byte value [0-255]
if (typeof Uint8Array.prototype.indexOf === 'function') {
if (dir) {
return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
} else {
return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
}
}
return arrayIndexOf(buffer, [val], byteOffset, encoding, dir)
}
throw new TypeError('val must be string, number or Buffer')
}
function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
var indexSize = 1
var arrLength = arr.length
var valLength = val.length
if (encoding !== undefined) {
encoding = String(encoding).toLowerCase()
if (encoding === 'ucs2' || encoding === 'ucs-2' ||
encoding === 'utf16le' || encoding === 'utf-16le') {
if (arr.length < 2 || val.length < 2) {
return -1
}
indexSize = 2
arrLength /= 2
valLength /= 2
byteOffset /= 2
}
}
function read (buf, i) {
if (indexSize === 1) {
return buf[i]
} else {
return buf.readUInt16BE(i * indexSize)
}
}
var i
if (dir) {
var foundIndex = -1
for (i = byteOffset; i < arrLength; i++) {
if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
if (foundIndex === -1) foundIndex = i
if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
} else {
if (foundIndex !== -1) i -= i - foundIndex
foundIndex = -1
}
}
} else {
if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
for (i = byteOffset; i >= 0; i--) {
var found = true
for (var j = 0; j < valLength; j++) {
if (read(arr, i + j) !== read(val, j)) {
found = false
break
}
}
if (found) return i
}
}
return -1
}
Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
return this.indexOf(val, byteOffset, encoding) !== -1
}
Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
}
Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
}
function hexWrite (buf, string, offset, length) {
offset = Number(offset) || 0
var remaining = buf.length - offset
if (!length) {
length = remaining
} else {
length = Number(length)
if (length > remaining) {
length = remaining
}
}
var strLen = string.length
if (length > strLen / 2) {
length = strLen / 2
}
for (var i = 0; i < length; ++i) {
var parsed = parseInt(string.substr(i * 2, 2), 16)
if (numberIsNaN(parsed)) return i
buf[offset + i] = parsed
}
return i
}
function utf8Write (buf, string, offset, length) {
return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}
function asciiWrite (buf, string, offset, length) {
return blitBuffer(asciiToBytes(string), buf, offset, length)
}
function latin1Write (buf, string, offset, length) {
return asciiWrite(buf, string, offset, length)
}
function base64Write (buf, string, offset, length) {
return blitBuffer(base64ToBytes(string), buf, offset, length)
}
function ucs2Write (buf, string, offset, length) {
return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}
Buffer.prototype.write = function write (string, offset, length, encoding) {
// Buffer#write(string)
if (offset === undefined) {
encoding = 'utf8'
length = this.length
offset = 0
// Buffer#write(string, encoding)
} else if (length === undefined && typeof offset === 'string') {
encoding = offset
length = this.length
offset = 0
// Buffer#write(string, offset[, length][, encoding])
} else if (isFinite(offset)) {
offset = offset >>> 0
if (isFinite(length)) {
length = length >>> 0
if (encoding === undefined) encoding = 'utf8'
} else {
encoding = length
length = undefined
}
} else {
throw new Error(
'Buffer.write(string, encoding, offset[, length]) is no longer supported'
)
}
var remaining = this.length - offset
if (length === undefined || length > remaining) length = remaining
if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
throw new RangeError('Attempt to write outside buffer bounds')
}
if (!encoding) encoding = 'utf8'
var loweredCase = false
for (;;) {
switch (encoding) {
case 'hex':
return hexWrite(this, string, offset, length)
case 'utf8':
case 'utf-8':
return utf8Write(this, string, offset, length)
case 'ascii':
return asciiWrite(this, string, offset, length)
case 'latin1':
case 'binary':
return latin1Write(this, string, offset, length)
case 'base64':
// Warning: maxLength not taken into account in base64Write
return base64Write(this, string, offset, length)
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return ucs2Write(this, string, offset, length)
default:
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
encoding = ('' + encoding).toLowerCase()
loweredCase = true
}
}
}
Buffer.prototype.toJSON = function toJSON () {
return {
type: 'Buffer',
data: Array.prototype.slice.call(this._arr || this, 0)
}
}
function base64Slice (buf, start, end) {
if (start === 0 && end === buf.length) {
return base64.fromByteArray(buf)
} else {
return base64.fromByteArray(buf.slice(start, end))
}
}
function utf8Slice (buf, start, end) {
end = Math.min(buf.length, end)
var res = []
var i = start
while (i < end) {
var firstByte = buf[i]
var codePoint = null
var bytesPerSequence = (firstByte > 0xEF) ? 4
: (firstByte > 0xDF) ? 3
: (firstByte > 0xBF) ? 2
: 1
if (i + bytesPerSequence <= end) {
var secondByte, thirdByte, fourthByte, tempCodePoint
switch (bytesPerSequence) {
case 1:
if (firstByte < 0x80) {
codePoint = firstByte
}
break
case 2:
secondByte = buf[i + 1]
if ((secondByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
if (tempCodePoint > 0x7F) {
codePoint = tempCodePoint
}
}
break
case 3:
secondByte = buf[i + 1]
thirdByte = buf[i + 2]
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
codePoint = tempCodePoint
}
}
break
case 4:
secondByte = buf[i + 1]
thirdByte = buf[i + 2]
fourthByte = buf[i + 3]
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
codePoint = tempCodePoint
}
}
}
}
if (codePoint === null) {
// we did not generate a valid codePoint so insert a
// replacement char (U+FFFD) and advance only 1 byte
codePoint = 0xFFFD
bytesPerSequence = 1
} else if (codePoint > 0xFFFF) {
// encode to utf16 (surrogate pair dance)
codePoint -= 0x10000
res.push(codePoint >>> 10 & 0x3FF | 0xD800)
codePoint = 0xDC00 | codePoint & 0x3FF
}
res.push(codePoint)
i += bytesPerSequence
}
return decodeCodePointsArray(res)
}
// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000
function decodeCodePointsArray (codePoints) {
var len = codePoints.length
if (len <= MAX_ARGUMENTS_LENGTH) {
return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
}
// Decode in chunks to avoid "call stack size exceeded".
var res = ''
var i = 0
while (i < len) {
res += String.fromCharCode.apply(
String,
codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
)
}
return res
}
function asciiSlice (buf, start, end) {
var ret = ''
end = Math.min(buf.length, end)
for (var i = start; i < end; ++i) {
ret += String.fromCharCode(buf[i] & 0x7F)
}
return ret
}
function latin1Slice (buf, start, end) {
var ret = ''
end = Math.min(buf.length, end)
for (var i = start; i < end; ++i) {
ret += String.fromCharCode(buf[i])
}
return ret
}
function hexSlice (buf, start, end) {
var len = buf.length
if (!start || start < 0) start = 0
if (!end || end < 0 || end > len) end = len
var out = ''
for (var i = start; i < end; ++i) {
out += toHex(buf[i])
}
return out
}
function utf16leSlice (buf, start, end) {
var bytes = buf.slice(start, end)
var res = ''
for (var i = 0; i < bytes.length; i += 2) {
res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
}
return res
}
Buffer.prototype.slice = function slice (start, end) {
var len = this.length
start = ~~start
end = end === undefined ? len : ~~end
if (start < 0) {
start += len
if (start < 0) start = 0
} else if (start > len) {
start = len
}
if (end < 0) {
end += len
if (end < 0) end = 0
} else if (end > len) {
end = len
}
if (end < start) end = start
var newBuf = this.subarray(start, end)
// Return an augmented `Uint8Array` instance
Object.setPrototypeOf(newBuf, Buffer.prototype)
return newBuf
}
/*
* Need to make sure that buffer isn't trying to write out of bounds.
*/
function checkOffset (offset, ext, length) {
if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}
Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
offset = offset >>> 0
byteLength = byteLength >>> 0
if (!noAssert) checkOffset(offset, byteLength, this.length)
var val = this[offset]
var mul = 1
var i = 0
while (++i < byteLength && (mul *= 0x100)) {
val += this[offset + i] * mul
}
return val
}
Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
offset = offset >>> 0
byteLength = byteLength >>> 0
if (!noAssert) {
checkOffset(offset, byteLength, this.length)
}
var val = this[offset + --byteLength]
var mul = 1
while (byteLength > 0 && (mul *= 0x100)) {
val += this[offset + --byteLength] * mul
}
return val
}
Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 1, this.length)
return this[offset]
}
Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 2, this.length)
return this[offset] | (this[offset + 1] << 8)
}
Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 2, this.length)
return (this[offset] << 8) | this[offset + 1]
}
Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 4, this.length)
return ((this[offset]) |
(this[offset + 1] << 8) |
(this[offset + 2] << 16)) +
(this[offset + 3] * 0x1000000)
}
Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 4, this.length)
return (this[offset] * 0x1000000) +
((this[offset + 1] << 16) |
(this[offset + 2] << 8) |
this[offset + 3])
}
Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
offset = offset >>> 0
byteLength = byteLength >>> 0
if (!noAssert) checkOffset(offset, byteLength, this.length)
var val = this[offset]
var mul = 1
var i = 0
while (++i < byteLength && (mul *= 0x100)) {
val += this[offset + i] * mul
}
mul *= 0x80
if (val >= mul) val -= Math.pow(2, 8 * byteLength)
return val
}
Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
offset = offset >>> 0
byteLength = byteLength >>> 0
if (!noAssert) checkOffset(offset, byteLength, this.length)
var i = byteLength
var mul = 1
var val = this[offset + --i]
while (i > 0 && (mul *= 0x100)) {
val += this[offset + --i] * mul
}
mul *= 0x80
if (val >= mul) val -= Math.pow(2, 8 * byteLength)
return val
}
Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 1, this.length)
if (!(this[offset] & 0x80)) return (this[offset])
return ((0xff - this[offset] + 1) * -1)
}
Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 2, this.length)
var val = this[offset] | (this[offset + 1] << 8)
return (val & 0x8000) ? val | 0xFFFF0000 : val
}
Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 2, this.length)
var val = this[offset + 1] | (this[offset] << 8)
return (val & 0x8000) ? val | 0xFFFF0000 : val
}
Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 4, this.length)
return (this[offset]) |
(this[offset + 1] << 8) |
(this[offset + 2] << 16) |
(this[offset + 3] << 24)
}
Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 4, this.length)
return (this[offset] << 24) |
(this[offset + 1] << 16) |
(this[offset + 2] << 8) |
(this[offset + 3])
}
Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 4, this.length)
return ieee754.read(this, offset, true, 23, 4)
}
Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 4, this.length)
return ieee754.read(this, offset, false, 23, 4)
}
Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 8, this.length)
return ieee754.read(this, offset, true, 52, 8)
}
Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
offset = offset >>> 0
if (!noAssert) checkOffset(offset, 8, this.length)
return ieee754.read(this, offset, false, 52, 8)
}
function checkInt (buf, value, offset, ext, max, min) {
if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
if (offset + ext > buf.length) throw new RangeError('Index out of range')
}
Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
value = +value
offset = offset >>> 0
byteLength = byteLength >>> 0
if (!noAssert) {
var maxBytes = Math.pow(2, 8 * byteLength) - 1
checkInt(this, value, offset, byteLength, maxBytes, 0)
}
var mul = 1
var i = 0
this[offset] = value & 0xFF
while (++i < byteLength && (mul *= 0x100)) {
this[offset + i] = (value / mul) & 0xFF
}
return offset + byteLength
}
Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
value = +value
offset = offset >>> 0
byteLength = byteLength >>> 0
if (!noAssert) {
var maxBytes = Math.pow(2, 8 * byteLength) - 1
checkInt(this, value, offset, byteLength, maxBytes, 0)
}
var i = byteLength - 1
var mul = 1
this[offset + i] = value & 0xFF
while (--i >= 0 && (mul *= 0x100)) {
this[offset + i] = (value / mul) & 0xFF
}
return offset + byteLength
}
Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
this[offset] = (value & 0xff)
return offset + 1
}
Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
this[offset] = (value & 0xff)
this[offset + 1] = (value >>> 8)
return offset + 2
}
Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
this[offset] = (value >>> 8)
this[offset + 1] = (value & 0xff)
return offset + 2
}
Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
this[offset + 3] = (value >>> 24)
this[offset + 2] = (value >>> 16)
this[offset + 1] = (value >>> 8)
this[offset] = (value & 0xff)
return offset + 4
}
Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
this[offset] = (value >>> 24)
this[offset + 1] = (value >>> 16)
this[offset + 2] = (value >>> 8)
this[offset + 3] = (value & 0xff)
return offset + 4
}
Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) {
var limit = Math.pow(2, (8 * byteLength) - 1)
checkInt(this, value, offset, byteLength, limit - 1, -limit)
}
var i = 0
var mul = 1
var sub = 0
this[offset] = value & 0xFF
while (++i < byteLength && (mul *= 0x100)) {
if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
sub = 1
}
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
}
return offset + byteLength
}
Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) {
var limit = Math.pow(2, (8 * byteLength) - 1)
checkInt(this, value, offset, byteLength, limit - 1, -limit)
}
var i = byteLength - 1
var mul = 1
var sub = 0
this[offset + i] = value & 0xFF
while (--i >= 0 && (mul *= 0x100)) {
if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
sub = 1
}
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
}
return offset + byteLength
}
Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
if (value < 0) value = 0xff + value + 1
this[offset] = (value & 0xff)
return offset + 1
}
Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
this[offset] = (value & 0xff)
this[offset + 1] = (value >>> 8)
return offset + 2
}
Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
this[offset] = (value >>> 8)
this[offset + 1] = (value & 0xff)
return offset + 2
}
Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
this[offset] = (value & 0xff)
this[offset + 1] = (value >>> 8)
this[offset + 2] = (value >>> 16)
this[offset + 3] = (value >>> 24)
return offset + 4
}
Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
if (value < 0) value = 0xffffffff + value + 1
this[offset] = (value >>> 24)
this[offset + 1] = (value >>> 16)
this[offset + 2] = (value >>> 8)
this[offset + 3] = (value & 0xff)
return offset + 4
}
function checkIEEE754 (buf, value, offset, ext, max, min) {
if (offset + ext > buf.length) throw new RangeError('Index out of range')
if (offset < 0) throw new RangeError('Index out of range')
}
function writeFloat (buf, value, offset, littleEndian, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) {
checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
}
ieee754.write(buf, value, offset, littleEndian, 23, 4)
return offset + 4
}
Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
return writeFloat(this, value, offset, true, noAssert)
}
Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
return writeFloat(this, value, offset, false, noAssert)
}
function writeDouble (buf, value, offset, littleEndian, noAssert) {
value = +value
offset = offset >>> 0
if (!noAssert) {
checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
}
ieee754.write(buf, value, offset, littleEndian, 52, 8)
return offset + 8
}
Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
return writeDouble(this, value, offset, true, noAssert)
}
Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
return writeDouble(this, value, offset, false, noAssert)
}
// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
if (!start) start = 0
if (!end && end !== 0) end = this.length
if (targetStart >= target.length) targetStart = target.length
if (!targetStart) targetStart = 0
if (end > 0 && end < start) end = start
// Copy 0 bytes; we're done
if (end === start) return 0
if (target.length === 0 || this.length === 0) return 0
// Fatal error conditions
if (targetStart < 0) {
throw new RangeError('targetStart out of bounds')
}
if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
if (end < 0) throw new RangeError('sourceEnd out of bounds')
// Are we oob?
if (end > this.length) end = this.length
if (target.length - targetStart < end - start) {
end = target.length - targetStart + start
}
var len = end - start
if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
// Use built-in when available, missing from IE11
this.copyWithin(targetStart, start, end)
} else if (this === target && start < targetStart && targetStart < end) {
// descending copy from end
for (var i = len - 1; i >= 0; --i) {
target[i + targetStart] = this[i + start]
}
} else {
Uint8Array.prototype.set.call(
target,
this.subarray(start, end),
targetStart
)
}
return len
}
// Usage:
// buffer.fill(number[, offset[, end]])
// buffer.fill(buffer[, offset[, end]])
// buffer.fill(string[, offset[, end]][, encoding])
Buffer.prototype.fill = function fill (val, start, end, encoding) {
// Handle string cases:
if (typeof val === 'string') {
if (typeof start === 'string') {
encoding = start
start = 0
end = this.length
} else if (typeof end === 'string') {
encoding = end
end = this.length
}
if (encoding !== undefined && typeof encoding !== 'string') {
throw new TypeError('encoding must be a string')
}
if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
throw new TypeError('Unknown encoding: ' + encoding)
}
if (val.length === 1) {
var code = val.charCodeAt(0)
if ((encoding === 'utf8' && code < 128) ||
encoding === 'latin1') {
// Fast path: If `val` fits into a single byte, use that numeric value.
val = code
}
}
} else if (typeof val === 'number') {
val = val & 255
} else if (typeof val === 'boolean') {
val = Number(val)
}
// Invalid ranges are not set to a default, so can range check early.
if (start < 0 || this.length < start || this.length < end) {
throw new RangeError('Out of range index')
}
if (end <= start) {
return this
}
start = start >>> 0
end = end === undefined ? this.length : end >>> 0
if (!val) val = 0
var i
if (typeof val === 'number') {
for (i = start; i < end; ++i) {
this[i] = val
}
} else {
var bytes = Buffer.isBuffer(val)
? val
: Buffer.from(val, encoding)
var len = bytes.length
if (len === 0) {
throw new TypeError('The value "' + val +
'" is invalid for argument "value"')
}
for (i = 0; i < end - start; ++i) {
this[i + start] = bytes[i % len]
}
}
return this
}
// HELPER FUNCTIONS
// ================
var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
function base64clean (str) {
// Node takes equal signs as end of the Base64 encoding
str = str.split('=')[0]
// Node strips out invalid characters like \n and \t from the string, base64-js does not
str = str.trim().replace(INVALID_BASE64_RE, '')
// Node converts strings with length < 2 to ''
if (str.length < 2) return ''
// Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
while (str.length % 4 !== 0) {
str = str + '='
}
return str
}
function toHex (n) {
if (n < 16) return '0' + n.toString(16)
return n.toString(16)
}
function utf8ToBytes (string, units) {
units = units || Infinity
var codePoint
var length = string.length
var leadSurrogate = null
var bytes = []
for (var i = 0; i < length; ++i) {
codePoint = string.charCodeAt(i)
// is surrogate component
if (codePoint > 0xD7FF && codePoint < 0xE000) {
// last char was a lead
if (!leadSurrogate) {
// no lead yet
if (codePoint > 0xDBFF) {
// unexpected trail
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
continue
} else if (i + 1 === length) {
// unpaired lead
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
continue
}
// valid lead
leadSurrogate = codePoint
continue
}
// 2 leads in a row
if (codePoint < 0xDC00) {
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
leadSurrogate = codePoint
continue
}
// valid surrogate pair
codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
} else if (leadSurrogate) {
// valid bmp char, but last char was a lead
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
}
leadSurrogate = null
// encode utf8
if (codePoint < 0x80) {
if ((units -= 1) < 0) break
bytes.push(codePoint)
} else if (codePoint < 0x800) {
if ((units -= 2) < 0) break
bytes.push(
codePoint >> 0x6 | 0xC0,
codePoint & 0x3F | 0x80
)
} else if (codePoint < 0x10000) {
if ((units -= 3) < 0) break
bytes.push(
codePoint >> 0xC | 0xE0,
codePoint >> 0x6 & 0x3F | 0x80,
codePoint & 0x3F | 0x80
)
} else if (codePoint < 0x110000) {
if ((units -= 4) < 0) break
bytes.push(
codePoint >> 0x12 | 0xF0,
codePoint >> 0xC & 0x3F | 0x80,
codePoint >> 0x6 & 0x3F | 0x80,
codePoint & 0x3F | 0x80
)
} else {
throw new Error('Invalid code point')
}
}
return bytes
}
function asciiToBytes (str) {
var byteArray = []
for (var i = 0; i < str.length; ++i) {
// Node's code seems to be doing this and not & 0x7F..
byteArray.push(str.charCodeAt(i) & 0xFF)
}
return byteArray
}
function utf16leToBytes (str, units) {
var c, hi, lo
var byteArray = []
for (var i = 0; i < str.length; ++i) {
if ((units -= 2) < 0) break
c = str.charCodeAt(i)
hi = c >> 8
lo = c % 256
byteArray.push(lo)
byteArray.push(hi)
}
return byteArray
}
function base64ToBytes (str) {
return base64.toByteArray(base64clean(str))
}
function blitBuffer (src, dst, offset, length) {
for (var i = 0; i < length; ++i) {
if ((i + offset >= dst.length) || (i >= src.length)) break
dst[i + offset] = src[i]
}
return i
}
// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
// the `instanceof` check but they should be treated as of that type.
// See: https://github.com/feross/buffer/issues/166
function isInstance (obj, type) {
return obj instanceof type ||
(obj != null && obj.constructor != null && obj.constructor.name != null &&
obj.constructor.name === type.name)
}
function numberIsNaN (obj) {
// For IE11 support
return obj !== obj // eslint-disable-line no-self-compare
}
}).call(this,require("buffer").Buffer)
},{"base64-js":10,"buffer":16,"ieee754":19}],17:[function(require,module,exports){
/**
* This is the common logic for both the Node.js and web browser
* implementations of `debug()`.
*/
function setup(env) {
createDebug.debug = createDebug;
createDebug.default = createDebug;
createDebug.coerce = coerce;
createDebug.disable = disable;
createDebug.enable = enable;
createDebug.enabled = enabled;
createDebug.humanize = require('ms');
Object.keys(env).forEach(key => {
createDebug[key] = env[key];
});
/**
* Active `debug` instances.
*/
createDebug.instances = [];
/**
* The currently active debug mode names, and names to skip.
*/
createDebug.names = [];
createDebug.skips = [];
/**
* Map of special "%n" handling functions, for the debug "format" argument.
*
* Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
*/
createDebug.formatters = {};
/**
* Selects a color for a debug namespace
* @param {String} namespace The namespace string for the for the debug instance to be colored
* @return {Number|String} An ANSI color code for the given namespace
* @api private
*/
function selectColor(namespace) {
let hash = 0;
for (let i = 0; i < namespace.length; i++) {
hash = ((hash << 5) - hash) + namespace.charCodeAt(i);
hash |= 0; // Convert to 32bit integer
}
return createDebug.colors[Math.abs(hash) % createDebug.colors.length];
}
createDebug.selectColor = selectColor;
/**
* Create a debugger with the given `namespace`.
*
* @param {String} namespace
* @return {Function}
* @api public
*/
function createDebug(namespace) {
let prevTime;
function debug(...args) {
// Disabled?
if (!debug.enabled) {
return;
}
const self = debug;
// Set `diff` timestamp
const curr = Number(new Date());
const ms = curr - (prevTime || curr);
self.diff = ms;
self.prev = prevTime;
self.curr = curr;
prevTime = curr;
args[0] = createDebug.coerce(args[0]);
if (typeof args[0] !== 'string') {
// Anything else let's inspect with %O
args.unshift('%O');
}
// Apply any `formatters` transformations
let index = 0;
args[0] = args[0].replace(/%([a-zA-Z%])/g, (match, format) => {
// If we encounter an escaped % then don't increase the array index
if (match === '%%') {
return match;
}
index++;
const formatter = createDebug.formatters[format];
if (typeof formatter === 'function') {
const val = args[index];
match = formatter.call(self, val);
// Now we need to remove `args[index]` since it's inlined in the `format`
args.splice(index, 1);
index--;
}
return match;
});
// Apply env-specific formatting (colors, etc.)
createDebug.formatArgs.call(self, args);
const logFn = self.log || createDebug.log;
logFn.apply(self, args);
}
debug.namespace = namespace;
debug.enabled = createDebug.enabled(namespace);
debug.useColors = createDebug.useColors();
debug.color = selectColor(namespace);
debug.destroy = destroy;
debug.extend = extend;
// Debug.formatArgs = formatArgs;
// debug.rawLog = rawLog;
// env-specific initialization logic for debug instances
if (typeof createDebug.init === 'function') {
createDebug.init(debug);
}
createDebug.instances.push(debug);
return debug;
}
function destroy() {
const index = createDebug.instances.indexOf(this);
if (index !== -1) {
createDebug.instances.splice(index, 1);
return true;
}
return false;
}
function extend(namespace, delimiter) {
const newDebug = createDebug(this.namespace + (typeof delimiter === 'undefined' ? ':' : delimiter) + namespace);
newDebug.log = this.log;
return newDebug;
}
/**
* Enables a debug mode by namespaces. This can include modes
* separated by a colon and wildcards.
*
* @param {String} namespaces
* @api public
*/
function enable(namespaces) {
createDebug.save(namespaces);
createDebug.names = [];
createDebug.skips = [];
let i;
const split = (typeof namespaces === 'string' ? namespaces : '').split(/[\s,]+/);
const len = split.length;
for (i = 0; i < len; i++) {
if (!split[i]) {
// ignore empty strings
continue;
}
namespaces = split[i].replace(/\*/g, '.*?');
if (namespaces[0] === '-') {
createDebug.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
} else {
createDebug.names.push(new RegExp('^' + namespaces + '$'));
}
}
for (i = 0; i < createDebug.instances.length; i++) {
const instance = createDebug.instances[i];
instance.enabled = createDebug.enabled(instance.namespace);
}
}
/**
* Disable debug output.
*
* @return {String} namespaces
* @api public
*/
function disable() {
const namespaces = [
...createDebug.names.map(toNamespace),
...createDebug.skips.map(toNamespace).map(namespace => '-' + namespace)
].join(',');
createDebug.enable('');
return namespaces;
}
/**
* Returns true if the given mode name is enabled, false otherwise.
*
* @param {String} name
* @return {Boolean}
* @api public
*/
function enabled(name) {
if (name[name.length - 1] === '*') {
return true;
}
let i;
let len;
for (i = 0, len = createDebug.skips.length; i < len; i++) {
if (createDebug.skips[i].test(name)) {
return false;
}
}
for (i = 0, len = createDebug.names.length; i < len; i++) {
if (createDebug.names[i].test(name)) {
return true;
}
}
return false;
}
/**
* Convert regexp to namespace
*
* @param {RegExp} regxep
* @return {String} namespace
* @api private
*/
function toNamespace(regexp) {
return regexp.toString()
.substring(2, regexp.toString().length - 2)
.replace(/\.\*\?$/, '*');
}
/**
* Coerce `val`.
*
* @param {Mixed} val
* @return {Mixed}
* @api private
*/
function coerce(val) {
if (val instanceof Error) {
return val.stack || val.message;
}
return val;
}
createDebug.enable(createDebug.load());
return createDebug;
}
module.exports = setup;
},{"ms":21}],18:[function(require,module,exports){
// originally pulled out of simple-peer
module.exports = function getBrowserRTC () {
if (typeof window === 'undefined') return null
var wrtc = {
RTCPeerConnection: window.RTCPeerConnection || window.mozRTCPeerConnection ||
window.webkitRTCPeerConnection,
RTCSessionDescription: window.RTCSessionDescription ||
window.mozRTCSessionDescription || window.webkitRTCSessionDescription,
RTCIceCandidate: window.RTCIceCandidate || window.mozRTCIceCandidate ||
window.webkitRTCIceCandidate
}
if (!wrtc.RTCPeerConnection) return null
return wrtc
}
},{}],19:[function(require,module,exports){
exports.read = function (buffer, offset, isLE, mLen, nBytes) {
var e, m
var eLen = (nBytes * 8) - mLen - 1
var eMax = (1 << eLen) - 1
var eBias = eMax >> 1
var nBits = -7
var i = isLE ? (nBytes - 1) : 0
var d = isLE ? -1 : 1
var s = buffer[offset + i]
i += d
e = s & ((1 << (-nBits)) - 1)
s >>= (-nBits)
nBits += eLen
for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
m = e & ((1 << (-nBits)) - 1)
e >>= (-nBits)
nBits += mLen
for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
if (e === 0) {
e = 1 - eBias
} else if (e === eMax) {
return m ? NaN : ((s ? -1 : 1) * Infinity)
} else {
m = m + Math.pow(2, mLen)
e = e - eBias
}
return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}
exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
var e, m, c
var eLen = (nBytes * 8) - mLen - 1
var eMax = (1 << eLen) - 1
var eBias = eMax >> 1
var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
var i = isLE ? 0 : (nBytes - 1)
var d = isLE ? 1 : -1
var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
value = Math.abs(value)
if (isNaN(value) || value === Infinity) {
m = isNaN(value) ? 1 : 0
e = eMax
} else {
e = Math.floor(Math.log(value) / Math.LN2)
if (value * (c = Math.pow(2, -e)) < 1) {
e--
c *= 2
}
if (e + eBias >= 1) {
value += rt / c
} else {
value += rt * Math.pow(2, 1 - eBias)
}
if (value * c >= 2) {
e++
c /= 2
}
if (e + eBias >= eMax) {
m = 0
e = eMax
} else if (e + eBias >= 1) {
m = ((value * c) - 1) * Math.pow(2, mLen)
e = e + eBias
} else {
m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
e = 0
}
}
for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
e = (e << mLen) | m
eLen += mLen
for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
buffer[offset + i - d] |= s * 128
}
},{}],20:[function(require,module,exports){
if (typeof Object.create === 'function') {
// implementation from standard node.js 'util' module
module.exports = function inherits(ctor, superCtor) {
if (superCtor) {
ctor.super_ = superCtor
ctor.prototype = Object.create(superCtor.prototype, {
constructor: {
value: ctor,
enumerable: false,
writable: true,
configurable: true
}
})
}
};
} else {
// old school shim for old browsers
module.exports = function inherits(ctor, superCtor) {
if (superCtor) {
ctor.super_ = superCtor
var TempCtor = function () {}
TempCtor.prototype = superCtor.prototype
ctor.prototype = new TempCtor()
ctor.prototype.constructor = ctor
}
}
}
},{}],21:[function(require,module,exports){
/**
* Helpers.
*/
var s = 1000;
var m = s * 60;
var h = m * 60;
var d = h * 24;
var w = d * 7;
var y = d * 365.25;
/**
* Parse or format the given `val`.
*
* Options:
*
* - `long` verbose formatting [false]
*
* @param {String|Number} val
* @param {Object} [options]
* @throws {Error} throw an error if val is not a non-empty string or a number
* @return {String|Number}
* @api public
*/
module.exports = function(val, options) {
options = options || {};
var type = typeof val;
if (type === 'string' && val.length > 0) {
return parse(val);
} else if (type === 'number' && isFinite(val)) {
return options.long ? fmtLong(val) : fmtShort(val);
}
throw new Error(
'val is not a non-empty string or a valid number. val=' +
JSON.stringify(val)
);
};
/**
* Parse the given `str` and return milliseconds.
*
* @param {String} str
* @return {Number}
* @api private
*/
function parse(str) {
str = String(str);
if (str.length > 100) {
return;
}
var match = /^(-?(?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(
str
);
if (!match) {
return;
}
var n = parseFloat(match[1]);
var type = (match[2] || 'ms').toLowerCase();
switch (type) {
case 'years':
case 'year':
case 'yrs':
case 'yr':
case 'y':
return n * y;
case 'weeks':
case 'week':
case 'w':
return n * w;
case 'days':
case 'day':
case 'd':
return n * d;
case 'hours':
case 'hour':
case 'hrs':
case 'hr':
case 'h':
return n * h;
case 'minutes':
case 'minute':
case 'mins':
case 'min':
case 'm':
return n * m;
case 'seconds':
case 'second':
case 'secs':
case 'sec':
case 's':
return n * s;
case 'milliseconds':
case 'millisecond':
case 'msecs':
case 'msec':
case 'ms':
return n;
default:
return undefined;
}
}
/**
* Short format for `ms`.
*
* @param {Number} ms
* @return {String}
* @api private
*/
function fmtShort(ms) {
var msAbs = Math.abs(ms);
if (msAbs >= d) {
return Math.round(ms / d) + 'd';
}
if (msAbs >= h) {
return Math.round(ms / h) + 'h';
}
if (msAbs >= m) {
return Math.round(ms / m) + 'm';
}
if (msAbs >= s) {
return Math.round(ms / s) + 's';
}
return ms + 'ms';
}
/**
* Long format for `ms`.
*
* @param {Number} ms
* @return {String}
* @api private
*/
function fmtLong(ms) {
var msAbs = Math.abs(ms);
if (msAbs >= d) {
return plural(ms, msAbs, d, 'day');
}
if (msAbs >= h) {
return plural(ms, msAbs, h, 'hour');
}
if (msAbs >= m) {
return plural(ms, msAbs, m, 'minute');
}
if (msAbs >= s) {
return plural(ms, msAbs, s, 'second');
}
return ms + ' ms';
}
/**
* Pluralization helper.
*/
function plural(ms, msAbs, n, name) {
var isPlural = msAbs >= n * 1.5;
return Math.round(ms / n) + ' ' + name + (isPlural ? 's' : '');
}
},{}],22:[function(require,module,exports){
var wrappy = require('wrappy')
module.exports = wrappy(once)
module.exports.strict = wrappy(onceStrict)
once.proto = once(function () {
Object.defineProperty(Function.prototype, 'once', {
value: function () {
return once(this)
},
configurable: true
})
Object.defineProperty(Function.prototype, 'onceStrict', {
value: function () {
return onceStrict(this)
},
configurable: true
})
})
function once (fn) {
var f = function () {
if (f.called) return f.value
f.called = true
return f.value = fn.apply(this, arguments)
}
f.called = false
return f
}
function onceStrict (fn) {
var f = function () {
if (f.called)
throw new Error(f.onceError)
f.called = true
return f.value = fn.apply(this, arguments)
}
var name = fn.name || 'Function wrapped with `once`'
f.onceError = name + " shouldn't be called more than once"
f.called = false
return f
}
},{"wrappy":49}],23:[function(require,module,exports){
// shim for using process in browser
var process = module.exports = {};
// cached from whatever global is present so that test runners that stub it
// don't break things. But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals. It's inside a
// function because try/catches deoptimize in certain engines.
var cachedSetTimeout;
var cachedClearTimeout;
function defaultSetTimout() {
throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
throw new Error('clearTimeout has not been defined');
}
(function () {
try {
if (typeof setTimeout === 'function') {
cachedSetTimeout = setTimeout;
} else {
cachedSetTimeout = defaultSetTimout;
}
} catch (e) {
cachedSetTimeout = defaultSetTimout;
}
try {
if (typeof clearTimeout === 'function') {
cachedClearTimeout = clearTimeout;
} else {
cachedClearTimeout = defaultClearTimeout;
}
} catch (e) {
cachedClearTimeout = defaultClearTimeout;
}
} ())
function runTimeout(fun) {
if (cachedSetTimeout === setTimeout) {
//normal enviroments in sane situations
return setTimeout(fun, 0);
}
// if setTimeout wasn't available but was latter defined
if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
cachedSetTimeout = setTimeout;
return setTimeout(fun, 0);
}
try {
// when when somebody has screwed with setTimeout but no I.E. maddness
return cachedSetTimeout(fun, 0);
} catch(e){
try {
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
return cachedSetTimeout.call(null, fun, 0);
} catch(e){
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
return cachedSetTimeout.call(this, fun, 0);
}
}
}
function runClearTimeout(marker) {
if (cachedClearTimeout === clearTimeout) {
//normal enviroments in sane situations
return clearTimeout(marker);
}
// if clearTimeout wasn't available but was latter defined
if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
cachedClearTimeout = clearTimeout;
return clearTimeout(marker);
}
try {
// when when somebody has screwed with setTimeout but no I.E. maddness
return cachedClearTimeout(marker);
} catch (e){
try {
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
return cachedClearTimeout.call(null, marker);
} catch (e){
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
// Some versions of I.E. have different rules for clearTimeout vs setTimeout
return cachedClearTimeout.call(this, marker);
}
}
}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;
function cleanUpNextTick() {
if (!draining || !currentQueue) {
return;
}
draining = false;
if (currentQueue.length) {
queue = currentQueue.concat(queue);
} else {
queueIndex = -1;
}
if (queue.length) {
drainQueue();
}
}
function drainQueue() {
if (draining) {
return;
}
var timeout = runTimeout(cleanUpNextTick);
draining = true;
var len = queue.length;
while(len) {
currentQueue = queue;
queue = [];
while (++queueIndex < len) {
if (currentQueue) {
currentQueue[queueIndex].run();
}
}
queueIndex = -1;
len = queue.length;
}
currentQueue = null;
draining = false;
runClearTimeout(timeout);
}
process.nextTick = function (fun) {
var args = new Array(arguments.length - 1);
if (arguments.length > 1) {
for (var i = 1; i < arguments.length; i++) {
args[i - 1] = arguments[i];
}
}
queue.push(new Item(fun, args));
if (queue.length === 1 && !draining) {
runTimeout(drainQueue);
}
};
// v8 likes predictible objects
function Item(fun, array) {
this.fun = fun;
this.array = array;
}
Item.prototype.run = function () {
this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};
function noop() {}
process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;
process.listeners = function (name) { return [] }
process.binding = function (name) {
throw new Error('process.binding is not supported');
};
process.cwd = function () { return '/' };
process.chdir = function (dir) {
throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };
},{}],24:[function(require,module,exports){
(function (process,global){
'use strict'
// limit of Crypto.getRandomValues()
// https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues
var MAX_BYTES = 65536
// Node supports requesting up to this number of bytes
// https://github.com/nodejs/node/blob/master/lib/internal/crypto/random.js#L48
var MAX_UINT32 = 4294967295
function oldBrowser () {
throw new Error('Secure random number generation is not supported by this browser.\nUse Chrome, Firefox or Internet Explorer 11')
}
var Buffer = require('safe-buffer').Buffer
var crypto = global.crypto || global.msCrypto
if (crypto && crypto.getRandomValues) {
module.exports = randomBytes
} else {
module.exports = oldBrowser
}
function randomBytes (size, cb) {
// phantomjs needs to throw
if (size > MAX_UINT32) throw new RangeError('requested too many random bytes')
var bytes = Buffer.allocUnsafe(size)
if (size > 0) { // getRandomValues fails on IE if size == 0
if (size > MAX_BYTES) { // this is the max bytes crypto.getRandomValues
// can do at once see https://developer.mozilla.org/en-US/docs/Web/API/window.crypto.getRandomValues
for (var generated = 0; generated < size; generated += MAX_BYTES) {
// buffer.slice automatically checks if the end is past the end of
// the buffer so we don't have to here
crypto.getRandomValues(bytes.slice(generated, generated + MAX_BYTES))
}
} else {
crypto.getRandomValues(bytes)
}
}
if (typeof cb === 'function') {
return process.nextTick(function () {
cb(null, bytes)
})
}
return bytes
}
}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"_process":23,"safe-buffer":41}],25:[function(require,module,exports){
'use strict';
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
var codes = {};
function createErrorType(code, message, Base) {
if (!Base) {
Base = Error;
}
function getMessage(arg1, arg2, arg3) {
if (typeof message === 'string') {
return message;
} else {
return message(arg1, arg2, arg3);
}
}
var NodeError =
/*#__PURE__*/
function (_Base) {
_inheritsLoose(NodeError, _Base);
function NodeError(arg1, arg2, arg3) {
return _Base.call(this, getMessage(arg1, arg2, arg3)) || this;
}
return NodeError;
}(Base);
NodeError.prototype.name = Base.name;
NodeError.prototype.code = code;
codes[code] = NodeError;
} // https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
function oneOf(expected, thing) {
if (Array.isArray(expected)) {
var len = expected.length;
expected = expected.map(function (i) {
return String(i);
});
if (len > 2) {
return "one of ".concat(thing, " ").concat(expected.slice(0, len - 1).join(', '), ", or ") + expected[len - 1];
} else if (len === 2) {
return "one of ".concat(thing, " ").concat(expected[0], " or ").concat(expected[1]);
} else {
return "of ".concat(thing, " ").concat(expected[0]);
}
} else {
return "of ".concat(thing, " ").concat(String(expected));
}
} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
function startsWith(str, search, pos) {
return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
function endsWith(str, search, this_len) {
if (this_len === undefined || this_len > str.length) {
this_len = str.length;
}
return str.substring(this_len - search.length, this_len) === search;
} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
function includes(str, search, start) {
if (typeof start !== 'number') {
start = 0;
}
if (start + search.length > str.length) {
return false;
} else {
return str.indexOf(search, start) !== -1;
}
}
createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
return 'The value "' + value + '" is invalid for option "' + name + '"';
}, TypeError);
createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
// determiner: 'must be' or 'must not be'
var determiner;
if (typeof expected === 'string' && startsWith(expected, 'not ')) {
determiner = 'must not be';
expected = expected.replace(/^not /, '');
} else {
determiner = 'must be';
}
var msg;
if (endsWith(name, ' argument')) {
// For cases like 'first argument'
msg = "The ".concat(name, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
} else {
var type = includes(name, '.') ? 'property' : 'argument';
msg = "The \"".concat(name, "\" ").concat(type, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
}
msg += ". Received type ".concat(typeof actual);
return msg;
}, TypeError);
createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
return 'The ' + name + ' method is not implemented';
});
createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
createErrorType('ERR_STREAM_DESTROYED', function (name) {
return 'Cannot call ' + name + ' after a stream was destroyed';
});
createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
return 'Unknown encoding: ' + arg;
}, TypeError);
createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
module.exports.codes = codes;
},{}],26:[function(require,module,exports){
(function (process){
'use strict'
var experimentalWarnings = new Set();
function emitExperimentalWarning(feature) {
if (experimentalWarnings.has(feature)) return;
var msg = feature + ' is an experimental feature. This feature could ' +
'change at any time';
experimentalWarnings.add(feature);
process.emitWarning(msg, 'ExperimentalWarning');
}
function noop() {}
module.exports.emitExperimentalWarning = process.emitWarning
? emitExperimentalWarning
: noop;
}).call(this,require('_process'))
},{"_process":23}],27:[function(require,module,exports){
(function (process){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a duplex stream is just a stream that is both readable and writable.
// Since JS doesn't have multiple prototypal inheritance, this class
// prototypally inherits from Readable, and then parasitically from
// Writable.
'use strict';
/*<replacement>*/
var objectKeys = Object.keys || function (obj) {
var keys = [];
for (var key in obj) {
keys.push(key);
}
return keys;
};
/*</replacement>*/
module.exports = Duplex;
var Readable = require('./_stream_readable');
var Writable = require('./_stream_writable');
require('inherits')(Duplex, Readable);
{
// Allow the keys array to be GC'ed.
var keys = objectKeys(Writable.prototype);
for (var v = 0; v < keys.length; v++) {
var method = keys[v];
if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
}
}
function Duplex(options) {
if (!(this instanceof Duplex)) return new Duplex(options);
Readable.call(this, options);
Writable.call(this, options);
this.allowHalfOpen = true;
if (options) {
if (options.readable === false) this.readable = false;
if (options.writable === false) this.writable = false;
if (options.allowHalfOpen === false) {
this.allowHalfOpen = false;
this.once('end', onend);
}
}
}
Object.defineProperty(Duplex.prototype, 'writableHighWaterMark', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._writableState.highWaterMark;
}
});
Object.defineProperty(Duplex.prototype, 'writableBuffer', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._writableState && this._writableState.getBuffer();
}
});
Object.defineProperty(Duplex.prototype, 'writableLength', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._writableState.length;
}
}); // the no-half-open enforcer
function onend() {
// If the writable side ended, then we're ok.
if (this._writableState.ended) return; // no more data can be written.
// But allow more writes to happen in this tick.
process.nextTick(onEndNT, this);
}
function onEndNT(self) {
self.end();
}
Object.defineProperty(Duplex.prototype, 'destroyed', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
if (this._readableState === undefined || this._writableState === undefined) {
return false;
}
return this._readableState.destroyed && this._writableState.destroyed;
},
set: function set(value) {
// we ignore the value if the stream
// has not been initialized yet
if (this._readableState === undefined || this._writableState === undefined) {
return;
} // backward compatibility, the user is explicitly
// managing destroyed
this._readableState.destroyed = value;
this._writableState.destroyed = value;
}
});
}).call(this,require('_process'))
},{"./_stream_readable":29,"./_stream_writable":31,"_process":23,"inherits":20}],28:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a passthrough stream.
// basically just the most minimal sort of Transform stream.
// Every written chunk gets output as-is.
'use strict';
module.exports = PassThrough;
var Transform = require('./_stream_transform');
require('inherits')(PassThrough, Transform);
function PassThrough(options) {
if (!(this instanceof PassThrough)) return new PassThrough(options);
Transform.call(this, options);
}
PassThrough.prototype._transform = function (chunk, encoding, cb) {
cb(null, chunk);
};
},{"./_stream_transform":30,"inherits":20}],29:[function(require,module,exports){
(function (process,global){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
module.exports = Readable;
/*<replacement>*/
var Duplex;
/*</replacement>*/
Readable.ReadableState = ReadableState;
/*<replacement>*/
var EE = require('events').EventEmitter;
var EElistenerCount = function EElistenerCount(emitter, type) {
return emitter.listeners(type).length;
};
/*</replacement>*/
/*<replacement>*/
var Stream = require('./internal/streams/stream');
/*</replacement>*/
var Buffer = require('buffer').Buffer;
var OurUint8Array = global.Uint8Array || function () {};
function _uint8ArrayToBuffer(chunk) {
return Buffer.from(chunk);
}
function _isUint8Array(obj) {
return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}
/*<replacement>*/
var debugUtil = require('util');
var debug;
if (debugUtil && debugUtil.debuglog) {
debug = debugUtil.debuglog('stream');
} else {
debug = function debug() {};
}
/*</replacement>*/
var BufferList = require('./internal/streams/buffer_list');
var destroyImpl = require('./internal/streams/destroy');
var _require = require('./internal/streams/state'),
getHighWaterMark = _require.getHighWaterMark;
var _require$codes = require('../errors').codes,
ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
ERR_STREAM_PUSH_AFTER_EOF = _require$codes.ERR_STREAM_PUSH_AFTER_EOF,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_STREAM_UNSHIFT_AFTER_END_EVENT = _require$codes.ERR_STREAM_UNSHIFT_AFTER_END_EVENT;
var _require2 = require('../experimentalWarning'),
emitExperimentalWarning = _require2.emitExperimentalWarning; // Lazy loaded to improve the startup performance.
var StringDecoder;
var createReadableStreamAsyncIterator;
require('inherits')(Readable, Stream);
var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];
function prependListener(emitter, event, fn) {
// Sadly this is not cacheable as some libraries bundle their own
// event emitter implementation with them.
if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn); // This is a hack to make sure that our error handler is attached before any
// userland ones. NEVER DO THIS. This is here only because this code needs
// to continue to work with older versions of Node.js that do not include
// the prependListener() method. The goal is to eventually remove this hack.
if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (Array.isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
}
function ReadableState(options, stream, isDuplex) {
Duplex = Duplex || require('./_stream_duplex');
options = options || {}; // Duplex streams are both readable and writable, but share
// the same options object.
// However, some cases require setting options to different
// values for the readable and the writable sides of the duplex stream.
// These options can be provided separately as readableXXX and writableXXX.
if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag. Used to make read(n) ignore n and to
// make all the buffer merging and length checks go away
this.objectMode = !!options.objectMode;
if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode; // the point at which it stops calling _read() to fill the buffer
// Note: 0 is a valid value, means "don't call _read preemptively ever"
this.highWaterMark = getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex); // A linked list is used to store data chunks instead of an array because the
// linked list can remove elements from the beginning faster than
// array.shift()
this.buffer = new BufferList();
this.length = 0;
this.pipes = null;
this.pipesCount = 0;
this.flowing = null;
this.ended = false;
this.endEmitted = false;
this.reading = false; // a flag to be able to tell if the event 'readable'/'data' is emitted
// immediately, or on a later tick. We set this to true at first, because
// any actions that shouldn't happen until "later" should generally also
// not happen before the first read call.
this.sync = true; // whenever we return null, then we set a flag to say
// that we're awaiting a 'readable' event emission.
this.needReadable = false;
this.emittedReadable = false;
this.readableListening = false;
this.resumeScheduled = false;
this.paused = true; // Should close be emitted on destroy. Defaults to true.
this.emitClose = options.emitClose !== false; // has it been destroyed
this.destroyed = false; // Crypto is kind of old and crusty. Historically, its default string
// encoding is 'binary' so we have to make this configurable.
// Everything else in the universe uses 'utf8', though.
this.defaultEncoding = options.defaultEncoding || 'utf8'; // the number of writers that are awaiting a drain event in .pipe()s
this.awaitDrain = 0; // if true, a maybeReadMore has been scheduled
this.readingMore = false;
this.decoder = null;
this.encoding = null;
if (options.encoding) {
if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
this.decoder = new StringDecoder(options.encoding);
this.encoding = options.encoding;
}
}
function Readable(options) {
Duplex = Duplex || require('./_stream_duplex');
if (!(this instanceof Readable)) return new Readable(options); // Checking for a Stream.Duplex instance is faster here instead of inside
// the ReadableState constructor, at least with V8 6.5
var isDuplex = this instanceof Duplex;
this._readableState = new ReadableState(options, this, isDuplex); // legacy
this.readable = true;
if (options) {
if (typeof options.read === 'function') this._read = options.read;
if (typeof options.destroy === 'function') this._destroy = options.destroy;
}
Stream.call(this);
}
Object.defineProperty(Readable.prototype, 'destroyed', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
if (this._readableState === undefined) {
return false;
}
return this._readableState.destroyed;
},
set: function set(value) {
// we ignore the value if the stream
// has not been initialized yet
if (!this._readableState) {
return;
} // backward compatibility, the user is explicitly
// managing destroyed
this._readableState.destroyed = value;
}
});
Readable.prototype.destroy = destroyImpl.destroy;
Readable.prototype._undestroy = destroyImpl.undestroy;
Readable.prototype._destroy = function (err, cb) {
cb(err);
}; // Manually shove something into the read() buffer.
// This returns true if the highWaterMark has not been hit yet,
// similar to how Writable.write() returns true if you should
// write() some more.
Readable.prototype.push = function (chunk, encoding) {
var state = this._readableState;
var skipChunkCheck;
if (!state.objectMode) {
if (typeof chunk === 'string') {
encoding = encoding || state.defaultEncoding;
if (encoding !== state.encoding) {
chunk = Buffer.from(chunk, encoding);
encoding = '';
}
skipChunkCheck = true;
}
} else {
skipChunkCheck = true;
}
return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
}; // Unshift should *always* be something directly out of read()
Readable.prototype.unshift = function (chunk) {
return readableAddChunk(this, chunk, null, true, false);
};
function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
debug('readableAddChunk', chunk);
var state = stream._readableState;
if (chunk === null) {
state.reading = false;
onEofChunk(stream, state);
} else {
var er;
if (!skipChunkCheck) er = chunkInvalid(state, chunk);
if (er) {
stream.emit('error', er);
} else if (state.objectMode || chunk && chunk.length > 0) {
if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {
chunk = _uint8ArrayToBuffer(chunk);
}
if (addToFront) {
if (state.endEmitted) stream.emit('error', new ERR_STREAM_UNSHIFT_AFTER_END_EVENT());else addChunk(stream, state, chunk, true);
} else if (state.ended) {
stream.emit('error', new ERR_STREAM_PUSH_AFTER_EOF());
} else if (state.destroyed) {
return false;
} else {
state.reading = false;
if (state.decoder && !encoding) {
chunk = state.decoder.write(chunk);
if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);
} else {
addChunk(stream, state, chunk, false);
}
}
} else if (!addToFront) {
state.reading = false;
maybeReadMore(stream, state);
}
} // We can push more data if we are below the highWaterMark.
// Also, if we have no data yet, we can stand some more bytes.
// This is to work around cases where hwm=0, such as the repl.
return !state.ended && (state.length < state.highWaterMark || state.length === 0);
}
function addChunk(stream, state, chunk, addToFront) {
if (state.flowing && state.length === 0 && !state.sync) {
state.awaitDrain = 0;
stream.emit('data', chunk);
} else {
// update the buffer info.
state.length += state.objectMode ? 1 : chunk.length;
if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);
if (state.needReadable) emitReadable(stream);
}
maybeReadMore(stream, state);
}
function chunkInvalid(state, chunk) {
var er;
if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk);
}
return er;
}
Readable.prototype.isPaused = function () {
return this._readableState.flowing === false;
}; // backwards compatibility.
Readable.prototype.setEncoding = function (enc) {
if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
this._readableState.decoder = new StringDecoder(enc); // if setEncoding(null), decoder.encoding equals utf8
this._readableState.encoding = this._readableState.decoder.encoding;
return this;
}; // Don't raise the hwm > 8MB
var MAX_HWM = 0x800000;
function computeNewHighWaterMark(n) {
if (n >= MAX_HWM) {
n = MAX_HWM;
} else {
// Get the next highest power of 2 to prevent increasing hwm excessively in
// tiny amounts
n--;
n |= n >>> 1;
n |= n >>> 2;
n |= n >>> 4;
n |= n >>> 8;
n |= n >>> 16;
n++;
}
return n;
} // This function is designed to be inlinable, so please take care when making
// changes to the function body.
function howMuchToRead(n, state) {
if (n <= 0 || state.length === 0 && state.ended) return 0;
if (state.objectMode) return 1;
if (n !== n) {
// Only flow one buffer at a time
if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
} // If we're asking for more than the current hwm, then raise the hwm.
if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
if (n <= state.length) return n; // Don't have enough
if (!state.ended) {
state.needReadable = true;
return 0;
}
return state.length;
} // you can override either this method, or the async _read(n) below.
Readable.prototype.read = function (n) {
debug('read', n);
n = parseInt(n, 10);
var state = this._readableState;
var nOrig = n;
if (n !== 0) state.emittedReadable = false; // if we're doing read(0) to trigger a readable event, but we
// already have a bunch of data in the buffer, then just trigger
// the 'readable' event and move on.
if (n === 0 && state.needReadable && ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)) {
debug('read: emitReadable', state.length, state.ended);
if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
return null;
}
n = howMuchToRead(n, state); // if we've ended, and we're now clear, then finish it up.
if (n === 0 && state.ended) {
if (state.length === 0) endReadable(this);
return null;
} // All the actual chunk generation logic needs to be
// *below* the call to _read. The reason is that in certain
// synthetic stream cases, such as passthrough streams, _read
// may be a completely synchronous operation which may change
// the state of the read buffer, providing enough data when
// before there was *not* enough.
//
// So, the steps are:
// 1. Figure out what the state of things will be after we do
// a read from the buffer.
//
// 2. If that resulting state will trigger a _read, then call _read.
// Note that this may be asynchronous, or synchronous. Yes, it is
// deeply ugly to write APIs this way, but that still doesn't mean
// that the Readable class should behave improperly, as streams are
// designed to be sync/async agnostic.
// Take note if the _read call is sync or async (ie, if the read call
// has returned yet), so that we know whether or not it's safe to emit
// 'readable' etc.
//
// 3. Actually pull the requested chunks out of the buffer and return.
// if we need a readable event, then we need to do some reading.
var doRead = state.needReadable;
debug('need readable', doRead); // if we currently have less than the highWaterMark, then also read some
if (state.length === 0 || state.length - n < state.highWaterMark) {
doRead = true;
debug('length less than watermark', doRead);
} // however, if we've ended, then there's no point, and if we're already
// reading, then it's unnecessary.
if (state.ended || state.reading) {
doRead = false;
debug('reading or ended', doRead);
} else if (doRead) {
debug('do read');
state.reading = true;
state.sync = true; // if the length is currently zero, then we *need* a readable event.
if (state.length === 0) state.needReadable = true; // call internal read method
this._read(state.highWaterMark);
state.sync = false; // If _read pushed data synchronously, then `reading` will be false,
// and we need to re-evaluate how much data we can return to the user.
if (!state.reading) n = howMuchToRead(nOrig, state);
}
var ret;
if (n > 0) ret = fromList(n, state);else ret = null;
if (ret === null) {
state.needReadable = true;
n = 0;
} else {
state.length -= n;
state.awaitDrain = 0;
}
if (state.length === 0) {
// If we have nothing in the buffer, then we want to know
// as soon as we *do* get something into the buffer.
if (!state.ended) state.needReadable = true; // If we tried to read() past the EOF, then emit end on the next tick.
if (nOrig !== n && state.ended) endReadable(this);
}
if (ret !== null) this.emit('data', ret);
return ret;
};
function onEofChunk(stream, state) {
if (state.ended) return;
if (state.decoder) {
var chunk = state.decoder.end();
if (chunk && chunk.length) {
state.buffer.push(chunk);
state.length += state.objectMode ? 1 : chunk.length;
}
}
state.ended = true;
if (state.sync) {
// if we are sync, wait until next tick to emit the data.
// Otherwise we risk emitting data in the flow()
// the readable code triggers during a read() call
emitReadable(stream);
} else {
// emit 'readable' now to make sure it gets picked up.
state.needReadable = false;
if (!state.emittedReadable) {
state.emittedReadable = true;
emitReadable_(stream);
}
}
} // Don't emit readable right away in sync mode, because this can trigger
// another read() call => stack overflow. This way, it might trigger
// a nextTick recursion warning, but that's not so bad.
function emitReadable(stream) {
var state = stream._readableState;
state.needReadable = false;
if (!state.emittedReadable) {
debug('emitReadable', state.flowing);
state.emittedReadable = true;
process.nextTick(emitReadable_, stream);
}
}
function emitReadable_(stream) {
var state = stream._readableState;
debug('emitReadable_', state.destroyed, state.length, state.ended);
if (!state.destroyed && (state.length || state.ended)) {
stream.emit('readable');
} // The stream needs another readable event if
// 1. It is not flowing, as the flow mechanism will take
// care of it.
// 2. It is not ended.
// 3. It is below the highWaterMark, so we can schedule
// another readable later.
state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark;
flow(stream);
} // at this point, the user has presumably seen the 'readable' event,
// and called read() to consume some data. that may have triggered
// in turn another _read(n) call, in which case reading = true if
// it's in progress.
// However, if we're not ended, or reading, and the length < hwm,
// then go ahead and try to read some more preemptively.
function maybeReadMore(stream, state) {
if (!state.readingMore) {
state.readingMore = true;
process.nextTick(maybeReadMore_, stream, state);
}
}
function maybeReadMore_(stream, state) {
// Attempt to read more data if we should.
//
// The conditions for reading more data are (one of):
// - Not enough data buffered (state.length < state.highWaterMark). The loop
// is responsible for filling the buffer with enough data if such data
// is available. If highWaterMark is 0 and we are not in the flowing mode
// we should _not_ attempt to buffer any extra data. We'll get more data
// when the stream consumer calls read() instead.
// - No data in the buffer, and the stream is in flowing mode. In this mode
// the loop below is responsible for ensuring read() is called. Failing to
// call read here would abort the flow and there's no other mechanism for
// continuing the flow if the stream consumer has just subscribed to the
// 'data' event.
//
// In addition to the above conditions to keep reading data, the following
// conditions prevent the data from being read:
// - The stream has ended (state.ended).
// - There is already a pending 'read' operation (state.reading). This is a
// case where the the stream has called the implementation defined _read()
// method, but they are processing the call asynchronously and have _not_
// called push() with new data. In this case we skip performing more
// read()s. The execution ends in this method again after the _read() ends
// up calling push() with more data.
while (!state.reading && !state.ended && (state.length < state.highWaterMark || state.flowing && state.length === 0)) {
var len = state.length;
debug('maybeReadMore read 0');
stream.read(0);
if (len === state.length) // didn't get any data, stop spinning.
break;
}
state.readingMore = false;
} // abstract method. to be overridden in specific implementation classes.
// call cb(er, data) where data is <= n in length.
// for virtual (non-string, non-buffer) streams, "length" is somewhat
// arbitrary, and perhaps not very meaningful.
Readable.prototype._read = function (n) {
this.emit('error', new ERR_METHOD_NOT_IMPLEMENTED('_read()'));
};
Readable.prototype.pipe = function (dest, pipeOpts) {
var src = this;
var state = this._readableState;
switch (state.pipesCount) {
case 0:
state.pipes = dest;
break;
case 1:
state.pipes = [state.pipes, dest];
break;
default:
state.pipes.push(dest);
break;
}
state.pipesCount += 1;
debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;
var endFn = doEnd ? onend : unpipe;
if (state.endEmitted) process.nextTick(endFn);else src.once('end', endFn);
dest.on('unpipe', onunpipe);
function onunpipe(readable, unpipeInfo) {
debug('onunpipe');
if (readable === src) {
if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
unpipeInfo.hasUnpiped = true;
cleanup();
}
}
}
function onend() {
debug('onend');
dest.end();
} // when the dest drains, it reduces the awaitDrain counter
// on the source. This would be more elegant with a .once()
// handler in flow(), but adding and removing repeatedly is
// too slow.
var ondrain = pipeOnDrain(src);
dest.on('drain', ondrain);
var cleanedUp = false;
function cleanup() {
debug('cleanup'); // cleanup event handlers once the pipe is broken
dest.removeListener('close', onclose);
dest.removeListener('finish', onfinish);
dest.removeListener('drain', ondrain);
dest.removeListener('error', onerror);
dest.removeListener('unpipe', onunpipe);
src.removeListener('end', onend);
src.removeListener('end', unpipe);
src.removeListener('data', ondata);
cleanedUp = true; // if the reader is waiting for a drain event from this
// specific writer, then it would cause it to never start
// flowing again.
// So, if this is awaiting a drain, then we just call it now.
// If we don't know, then assume that we are waiting for one.
if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
}
src.on('data', ondata);
function ondata(chunk) {
debug('ondata');
var ret = dest.write(chunk);
debug('dest.write', ret);
if (ret === false) {
// If the user unpiped during `dest.write()`, it is possible
// to get stuck in a permanently paused state if that write
// also returned false.
// => Check whether `dest` is still a piping destination.
if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
debug('false write response, pause', state.awaitDrain);
state.awaitDrain++;
}
src.pause();
}
} // if the dest has an error, then stop piping into it.
// however, don't suppress the throwing behavior for this.
function onerror(er) {
debug('onerror', er);
unpipe();
dest.removeListener('error', onerror);
if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er);
} // Make sure our error handler is attached before userland ones.
prependListener(dest, 'error', onerror); // Both close and finish should trigger unpipe, but only once.
function onclose() {
dest.removeListener('finish', onfinish);
unpipe();
}
dest.once('close', onclose);
function onfinish() {
debug('onfinish');
dest.removeListener('close', onclose);
unpipe();
}
dest.once('finish', onfinish);
function unpipe() {
debug('unpipe');
src.unpipe(dest);
} // tell the dest that it's being piped to
dest.emit('pipe', src); // start the flow if it hasn't been started already.
if (!state.flowing) {
debug('pipe resume');
src.resume();
}
return dest;
};
function pipeOnDrain(src) {
return function pipeOnDrainFunctionResult() {
var state = src._readableState;
debug('pipeOnDrain', state.awaitDrain);
if (state.awaitDrain) state.awaitDrain--;
if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
state.flowing = true;
flow(src);
}
};
}
Readable.prototype.unpipe = function (dest) {
var state = this._readableState;
var unpipeInfo = {
hasUnpiped: false
}; // if we're not piping anywhere, then do nothing.
if (state.pipesCount === 0) return this; // just one destination. most common case.
if (state.pipesCount === 1) {
// passed in one, but it's not the right one.
if (dest && dest !== state.pipes) return this;
if (!dest) dest = state.pipes; // got a match.
state.pipes = null;
state.pipesCount = 0;
state.flowing = false;
if (dest) dest.emit('unpipe', this, unpipeInfo);
return this;
} // slow case. multiple pipe destinations.
if (!dest) {
// remove all.
var dests = state.pipes;
var len = state.pipesCount;
state.pipes = null;
state.pipesCount = 0;
state.flowing = false;
for (var i = 0; i < len; i++) {
dests[i].emit('unpipe', this, {
hasUnpiped: false
});
}
return this;
} // try to find the right one.
var index = indexOf(state.pipes, dest);
if (index === -1) return this;
state.pipes.splice(index, 1);
state.pipesCount -= 1;
if (state.pipesCount === 1) state.pipes = state.pipes[0];
dest.emit('unpipe', this, unpipeInfo);
return this;
}; // set up data events if they are asked for
// Ensure readable listeners eventually get something
Readable.prototype.on = function (ev, fn) {
var res = Stream.prototype.on.call(this, ev, fn);
var state = this._readableState;
if (ev === 'data') {
// update readableListening so that resume() may be a no-op
// a few lines down. This is needed to support once('readable').
state.readableListening = this.listenerCount('readable') > 0; // Try start flowing on next tick if stream isn't explicitly paused
if (state.flowing !== false) this.resume();
} else if (ev === 'readable') {
if (!state.endEmitted && !state.readableListening) {
state.readableListening = state.needReadable = true;
state.flowing = false;
state.emittedReadable = false;
debug('on readable', state.length, state.reading);
if (state.length) {
emitReadable(this);
} else if (!state.reading) {
process.nextTick(nReadingNextTick, this);
}
}
}
return res;
};
Readable.prototype.addListener = Readable.prototype.on;
Readable.prototype.removeListener = function (ev, fn) {
var res = Stream.prototype.removeListener.call(this, ev, fn);
if (ev === 'readable') {
// We need to check if there is someone still listening to
// readable and reset the state. However this needs to happen
// after readable has been emitted but before I/O (nextTick) to
// support once('readable', fn) cycles. This means that calling
// resume within the same tick will have no
// effect.
process.nextTick(updateReadableListening, this);
}
return res;
};
Readable.prototype.removeAllListeners = function (ev) {
var res = Stream.prototype.removeAllListeners.apply(this, arguments);
if (ev === 'readable' || ev === undefined) {
// We need to check if there is someone still listening to
// readable and reset the state. However this needs to happen
// after readable has been emitted but before I/O (nextTick) to
// support once('readable', fn) cycles. This means that calling
// resume within the same tick will have no
// effect.
process.nextTick(updateReadableListening, this);
}
return res;
};
function updateReadableListening(self) {
var state = self._readableState;
state.readableListening = self.listenerCount('readable') > 0;
if (state.resumeScheduled && !state.paused) {
// flowing needs to be set to true now, otherwise
// the upcoming resume will not flow.
state.flowing = true; // crude way to check if we should resume
} else if (self.listenerCount('data') > 0) {
self.resume();
}
}
function nReadingNextTick(self) {
debug('readable nexttick read 0');
self.read(0);
} // pause() and resume() are remnants of the legacy readable stream API
// If the user uses them, then switch into old mode.
Readable.prototype.resume = function () {
var state = this._readableState;
if (!state.flowing) {
debug('resume'); // we flow only if there is no one listening
// for readable, but we still have to call
// resume()
state.flowing = !state.readableListening;
resume(this, state);
}
state.paused = false;
return this;
};
function resume(stream, state) {
if (!state.resumeScheduled) {
state.resumeScheduled = true;
process.nextTick(resume_, stream, state);
}
}
function resume_(stream, state) {
debug('resume', state.reading);
if (!state.reading) {
stream.read(0);
}
state.resumeScheduled = false;
stream.emit('resume');
flow(stream);
if (state.flowing && !state.reading) stream.read(0);
}
Readable.prototype.pause = function () {
debug('call pause flowing=%j', this._readableState.flowing);
if (this._readableState.flowing !== false) {
debug('pause');
this._readableState.flowing = false;
this.emit('pause');
}
this._readableState.paused = true;
return this;
};
function flow(stream) {
var state = stream._readableState;
debug('flow', state.flowing);
while (state.flowing && stream.read() !== null) {
;
}
} // wrap an old-style stream as the async data source.
// This is *not* part of the readable stream interface.
// It is an ugly unfortunate mess of history.
Readable.prototype.wrap = function (stream) {
var _this = this;
var state = this._readableState;
var paused = false;
stream.on('end', function () {
debug('wrapped end');
if (state.decoder && !state.ended) {
var chunk = state.decoder.end();
if (chunk && chunk.length) _this.push(chunk);
}
_this.push(null);
});
stream.on('data', function (chunk) {
debug('wrapped data');
if (state.decoder) chunk = state.decoder.write(chunk); // don't skip over falsy values in objectMode
if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;
var ret = _this.push(chunk);
if (!ret) {
paused = true;
stream.pause();
}
}); // proxy all the other methods.
// important when wrapping filters and duplexes.
for (var i in stream) {
if (this[i] === undefined && typeof stream[i] === 'function') {
this[i] = function methodWrap(method) {
return function methodWrapReturnFunction() {
return stream[method].apply(stream, arguments);
};
}(i);
}
} // proxy certain important events.
for (var n = 0; n < kProxyEvents.length; n++) {
stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));
} // when we try to consume some more bytes, simply unpause the
// underlying stream.
this._read = function (n) {
debug('wrapped _read', n);
if (paused) {
paused = false;
stream.resume();
}
};
return this;
};
if (typeof Symbol === 'function') {
Readable.prototype[Symbol.asyncIterator] = function () {
emitExperimentalWarning('Readable[Symbol.asyncIterator]');
if (createReadableStreamAsyncIterator === undefined) {
createReadableStreamAsyncIterator = require('./internal/streams/async_iterator');
}
return createReadableStreamAsyncIterator(this);
};
}
Object.defineProperty(Readable.prototype, 'readableHighWaterMark', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._readableState.highWaterMark;
}
});
Object.defineProperty(Readable.prototype, 'readableBuffer', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._readableState && this._readableState.buffer;
}
});
Object.defineProperty(Readable.prototype, 'readableFlowing', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._readableState.flowing;
},
set: function set(state) {
if (this._readableState) {
this._readableState.flowing = state;
}
}
}); // exposed for testing purposes only.
Readable._fromList = fromList;
Object.defineProperty(Readable.prototype, 'readableLength', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._readableState.length;
}
}); // Pluck off n bytes from an array of buffers.
// Length is the combined lengths of all the buffers in the list.
// This function is designed to be inlinable, so please take care when making
// changes to the function body.
function fromList(n, state) {
// nothing buffered
if (state.length === 0) return null;
var ret;
if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
// read it all, truncate the list
if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.first();else ret = state.buffer.concat(state.length);
state.buffer.clear();
} else {
// read part of list
ret = state.buffer.consume(n, state.decoder);
}
return ret;
}
function endReadable(stream) {
var state = stream._readableState;
debug('endReadable', state.endEmitted);
if (!state.endEmitted) {
state.ended = true;
process.nextTick(endReadableNT, state, stream);
}
}
function endReadableNT(state, stream) {
debug('endReadableNT', state.endEmitted, state.length); // Check that we didn't get one last unshift.
if (!state.endEmitted && state.length === 0) {
state.endEmitted = true;
stream.readable = false;
stream.emit('end');
}
}
function indexOf(xs, x) {
for (var i = 0, l = xs.length; i < l; i++) {
if (xs[i] === x) return i;
}
return -1;
}
}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"../errors":25,"../experimentalWarning":26,"./_stream_duplex":27,"./internal/streams/async_iterator":32,"./internal/streams/buffer_list":33,"./internal/streams/destroy":34,"./internal/streams/state":37,"./internal/streams/stream":38,"_process":23,"buffer":16,"events":"events","inherits":20,"string_decoder/":46,"util":15}],30:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a transform stream is a readable/writable stream where you do
// something with the data. Sometimes it's called a "filter",
// but that's not a great name for it, since that implies a thing where
// some bits pass through, and others are simply ignored. (That would
// be a valid example of a transform, of course.)
//
// While the output is causally related to the input, it's not a
// necessarily symmetric or synchronous transformation. For example,
// a zlib stream might take multiple plain-text writes(), and then
// emit a single compressed chunk some time in the future.
//
// Here's how this works:
//
// The Transform stream has all the aspects of the readable and writable
// stream classes. When you write(chunk), that calls _write(chunk,cb)
// internally, and returns false if there's a lot of pending writes
// buffered up. When you call read(), that calls _read(n) until
// there's enough pending readable data buffered up.
//
// In a transform stream, the written data is placed in a buffer. When
// _read(n) is called, it transforms the queued up data, calling the
// buffered _write cb's as it consumes chunks. If consuming a single
// written chunk would result in multiple output chunks, then the first
// outputted bit calls the readcb, and subsequent chunks just go into
// the read buffer, and will cause it to emit 'readable' if necessary.
//
// This way, back-pressure is actually determined by the reading side,
// since _read has to be called to start processing a new chunk. However,
// a pathological inflate type of transform can cause excessive buffering
// here. For example, imagine a stream where every byte of input is
// interpreted as an integer from 0-255, and then results in that many
// bytes of output. Writing the 4 bytes {ff,ff,ff,ff} would result in
// 1kb of data being output. In this case, you could write a very small
// amount of input, and end up with a very large amount of output. In
// such a pathological inflating mechanism, there'd be no way to tell
// the system to stop doing the transform. A single 4MB write could
// cause the system to run out of memory.
//
// However, even in such a pathological case, only a single written chunk
// would be consumed, and then the rest would wait (un-transformed) until
// the results of the previous transformed chunk were consumed.
'use strict';
module.exports = Transform;
var _require$codes = require('../errors').codes,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
ERR_TRANSFORM_ALREADY_TRANSFORMING = _require$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,
ERR_TRANSFORM_WITH_LENGTH_0 = _require$codes.ERR_TRANSFORM_WITH_LENGTH_0;
var Duplex = require('./_stream_duplex');
require('inherits')(Transform, Duplex);
function afterTransform(er, data) {
var ts = this._transformState;
ts.transforming = false;
var cb = ts.writecb;
if (cb === null) {
return this.emit('error', new ERR_MULTIPLE_CALLBACK());
}
ts.writechunk = null;
ts.writecb = null;
if (data != null) // single equals check for both `null` and `undefined`
this.push(data);
cb(er);
var rs = this._readableState;
rs.reading = false;
if (rs.needReadable || rs.length < rs.highWaterMark) {
this._read(rs.highWaterMark);
}
}
function Transform(options) {
if (!(this instanceof Transform)) return new Transform(options);
Duplex.call(this, options);
this._transformState = {
afterTransform: afterTransform.bind(this),
needTransform: false,
transforming: false,
writecb: null,
writechunk: null,
writeencoding: null
}; // start out asking for a readable event once data is transformed.
this._readableState.needReadable = true; // we have implemented the _read method, and done the other things
// that Readable wants before the first _read call, so unset the
// sync guard flag.
this._readableState.sync = false;
if (options) {
if (typeof options.transform === 'function') this._transform = options.transform;
if (typeof options.flush === 'function') this._flush = options.flush;
} // When the writable side finishes, then flush out anything remaining.
this.on('prefinish', prefinish);
}
function prefinish() {
var _this = this;
if (typeof this._flush === 'function' && !this._readableState.destroyed) {
this._flush(function (er, data) {
done(_this, er, data);
});
} else {
done(this, null, null);
}
}
Transform.prototype.push = function (chunk, encoding) {
this._transformState.needTransform = false;
return Duplex.prototype.push.call(this, chunk, encoding);
}; // This is the part where you do stuff!
// override this function in implementation classes.
// 'chunk' is an input chunk.
//
// Call `push(newChunk)` to pass along transformed output
// to the readable side. You may call 'push' zero or more times.
//
// Call `cb(err)` when you are done with this chunk. If you pass
// an error, then that'll put the hurt on the whole operation. If you
// never call cb(), then you'll never get another chunk.
Transform.prototype._transform = function (chunk, encoding, cb) {
cb(new ERR_METHOD_NOT_IMPLEMENTED('_transform()'));
};
Transform.prototype._write = function (chunk, encoding, cb) {
var ts = this._transformState;
ts.writecb = cb;
ts.writechunk = chunk;
ts.writeencoding = encoding;
if (!ts.transforming) {
var rs = this._readableState;
if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
}
}; // Doesn't matter what the args are here.
// _transform does all the work.
// That we got here means that the readable side wants more data.
Transform.prototype._read = function (n) {
var ts = this._transformState;
if (ts.writechunk !== null && !ts.transforming) {
ts.transforming = true;
this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
} else {
// mark that we need a transform, so that any data that comes in
// will get processed, now that we've asked for it.
ts.needTransform = true;
}
};
Transform.prototype._destroy = function (err, cb) {
Duplex.prototype._destroy.call(this, err, function (err2) {
cb(err2);
});
};
function done(stream, er, data) {
if (er) return stream.emit('error', er);
if (data != null) // single equals check for both `null` and `undefined`
stream.push(data); // TODO(BridgeAR): Write a test for these two error cases
// if there's nothing in the write buffer, then that means
// that nothing more will ever be provided
if (stream._writableState.length) throw new ERR_TRANSFORM_WITH_LENGTH_0();
if (stream._transformState.transforming) throw new ERR_TRANSFORM_ALREADY_TRANSFORMING();
return stream.push(null);
}
},{"../errors":25,"./_stream_duplex":27,"inherits":20}],31:[function(require,module,exports){
(function (process,global){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// A bit simpler than readable streams.
// Implement an async ._write(chunk, encoding, cb), and it'll handle all
// the drain event emission and buffering.
'use strict';
module.exports = Writable;
/* <replacement> */
function WriteReq(chunk, encoding, cb) {
this.chunk = chunk;
this.encoding = encoding;
this.callback = cb;
this.next = null;
} // It seems a linked list but it is not
// there will be only 2 of these for each stream
function CorkedRequest(state) {
var _this = this;
this.next = null;
this.entry = null;
this.finish = function () {
onCorkedFinish(_this, state);
};
}
/* </replacement> */
/*<replacement>*/
var Duplex;
/*</replacement>*/
Writable.WritableState = WritableState;
/*<replacement>*/
var internalUtil = {
deprecate: require('util-deprecate')
};
/*</replacement>*/
/*<replacement>*/
var Stream = require('./internal/streams/stream');
/*</replacement>*/
var Buffer = require('buffer').Buffer;
var OurUint8Array = global.Uint8Array || function () {};
function _uint8ArrayToBuffer(chunk) {
return Buffer.from(chunk);
}
function _isUint8Array(obj) {
return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}
var destroyImpl = require('./internal/streams/destroy');
var _require = require('./internal/streams/state'),
getHighWaterMark = _require.getHighWaterMark;
var _require$codes = require('../errors').codes,
ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
ERR_STREAM_CANNOT_PIPE = _require$codes.ERR_STREAM_CANNOT_PIPE,
ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED,
ERR_STREAM_NULL_VALUES = _require$codes.ERR_STREAM_NULL_VALUES,
ERR_STREAM_WRITE_AFTER_END = _require$codes.ERR_STREAM_WRITE_AFTER_END,
ERR_UNKNOWN_ENCODING = _require$codes.ERR_UNKNOWN_ENCODING;
require('inherits')(Writable, Stream);
function nop() {}
function WritableState(options, stream, isDuplex) {
Duplex = Duplex || require('./_stream_duplex');
options = options || {}; // Duplex streams are both readable and writable, but share
// the same options object.
// However, some cases require setting options to different
// values for the readable and the writable sides of the duplex stream,
// e.g. options.readableObjectMode vs. options.writableObjectMode, etc.
if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag to indicate whether or not this stream
// contains buffers or objects.
this.objectMode = !!options.objectMode;
if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode; // the point at which write() starts returning false
// Note: 0 is a valid value, means that we always return false if
// the entire buffer is not flushed immediately on write()
this.highWaterMark = getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex); // if _final has been called
this.finalCalled = false; // drain event flag.
this.needDrain = false; // at the start of calling end()
this.ending = false; // when end() has been called, and returned
this.ended = false; // when 'finish' is emitted
this.finished = false; // has it been destroyed
this.destroyed = false; // should we decode strings into buffers before passing to _write?
// this is here so that some node-core streams can optimize string
// handling at a lower level.
var noDecode = options.decodeStrings === false;
this.decodeStrings = !noDecode; // Crypto is kind of old and crusty. Historically, its default string
// encoding is 'binary' so we have to make this configurable.
// Everything else in the universe uses 'utf8', though.
this.defaultEncoding = options.defaultEncoding || 'utf8'; // not an actual buffer we keep track of, but a measurement
// of how much we're waiting to get pushed to some underlying
// socket or file.
this.length = 0; // a flag to see when we're in the middle of a write.
this.writing = false; // when true all writes will be buffered until .uncork() call
this.corked = 0; // a flag to be able to tell if the onwrite cb is called immediately,
// or on a later tick. We set this to true at first, because any
// actions that shouldn't happen until "later" should generally also
// not happen before the first write call.
this.sync = true; // a flag to know if we're processing previously buffered items, which
// may call the _write() callback in the same tick, so that we don't
// end up in an overlapped onwrite situation.
this.bufferProcessing = false; // the callback that's passed to _write(chunk,cb)
this.onwrite = function (er) {
onwrite(stream, er);
}; // the callback that the user supplies to write(chunk,encoding,cb)
this.writecb = null; // the amount that is being written when _write is called.
this.writelen = 0;
this.bufferedRequest = null;
this.lastBufferedRequest = null; // number of pending user-supplied write callbacks
// this must be 0 before 'finish' can be emitted
this.pendingcb = 0; // emit prefinish if the only thing we're waiting for is _write cbs
// This is relevant for synchronous Transform streams
this.prefinished = false; // True if the error was already emitted and should not be thrown again
this.errorEmitted = false; // Should close be emitted on destroy. Defaults to true.
this.emitClose = options.emitClose !== false; // count buffered requests
this.bufferedRequestCount = 0; // allocate the first CorkedRequest, there is always
// one allocated and free to use, and we maintain at most two
this.corkedRequestsFree = new CorkedRequest(this);
}
WritableState.prototype.getBuffer = function getBuffer() {
var current = this.bufferedRequest;
var out = [];
while (current) {
out.push(current);
current = current.next;
}
return out;
};
(function () {
try {
Object.defineProperty(WritableState.prototype, 'buffer', {
get: internalUtil.deprecate(function writableStateBufferGetter() {
return this.getBuffer();
}, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')
});
} catch (_) {}
})(); // Test _writableState for inheritance to account for Duplex streams,
// whose prototype chain only points to Readable.
var realHasInstance;
if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {
realHasInstance = Function.prototype[Symbol.hasInstance];
Object.defineProperty(Writable, Symbol.hasInstance, {
value: function value(object) {
if (realHasInstance.call(this, object)) return true;
if (this !== Writable) return false;
return object && object._writableState instanceof WritableState;
}
});
} else {
realHasInstance = function realHasInstance(object) {
return object instanceof this;
};
}
function Writable(options) {
Duplex = Duplex || require('./_stream_duplex'); // Writable ctor is applied to Duplexes, too.
// `realHasInstance` is necessary because using plain `instanceof`
// would return false, as no `_writableState` property is attached.
// Trying to use the custom `instanceof` for Writable here will also break the
// Node.js LazyTransform implementation, which has a non-trivial getter for
// `_writableState` that would lead to infinite recursion.
// Checking for a Stream.Duplex instance is faster here instead of inside
// the WritableState constructor, at least with V8 6.5
var isDuplex = this instanceof Duplex;
if (!isDuplex && !realHasInstance.call(Writable, this)) return new Writable(options);
this._writableState = new WritableState(options, this, isDuplex); // legacy.
this.writable = true;
if (options) {
if (typeof options.write === 'function') this._write = options.write;
if (typeof options.writev === 'function') this._writev = options.writev;
if (typeof options.destroy === 'function') this._destroy = options.destroy;
if (typeof options.final === 'function') this._final = options.final;
}
Stream.call(this);
} // Otherwise people can pipe Writable streams, which is just wrong.
Writable.prototype.pipe = function () {
this.emit('error', new ERR_STREAM_CANNOT_PIPE());
};
function writeAfterEnd(stream, cb) {
var er = new ERR_STREAM_WRITE_AFTER_END(); // TODO: defer error events consistently everywhere, not just the cb
stream.emit('error', er);
process.nextTick(cb, er);
} // Checks that a user-supplied chunk is valid, especially for the particular
// mode the stream is in. Currently this means that `null` is never accepted
// and undefined/non-string values are only allowed in object mode.
function validChunk(stream, state, chunk, cb) {
var er;
if (chunk === null) {
er = new ERR_STREAM_NULL_VALUES();
} else if (typeof chunk !== 'string' && !state.objectMode) {
er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer'], chunk);
}
if (er) {
stream.emit('error', er);
process.nextTick(cb, er);
return false;
}
return true;
}
Writable.prototype.write = function (chunk, encoding, cb) {
var state = this._writableState;
var ret = false;
var isBuf = !state.objectMode && _isUint8Array(chunk);
if (isBuf && !Buffer.isBuffer(chunk)) {
chunk = _uint8ArrayToBuffer(chunk);
}
if (typeof encoding === 'function') {
cb = encoding;
encoding = null;
}
if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
if (typeof cb !== 'function') cb = nop;
if (state.ending) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {
state.pendingcb++;
ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);
}
return ret;
};
Writable.prototype.cork = function () {
this._writableState.corked++;
};
Writable.prototype.uncork = function () {
var state = this._writableState;
if (state.corked) {
state.corked--;
if (!state.writing && !state.corked && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
}
};
Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
// node::ParseEncoding() requires lower case.
if (typeof encoding === 'string') encoding = encoding.toLowerCase();
if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new ERR_UNKNOWN_ENCODING(encoding);
this._writableState.defaultEncoding = encoding;
return this;
};
Object.defineProperty(Writable.prototype, 'writableBuffer', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._writableState && this._writableState.getBuffer();
}
});
function decodeChunk(state, chunk, encoding) {
if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
chunk = Buffer.from(chunk, encoding);
}
return chunk;
}
Object.defineProperty(Writable.prototype, 'writableHighWaterMark', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._writableState.highWaterMark;
}
}); // if we're already writing something, then just put this
// in the queue, and wait our turn. Otherwise, call _write
// If we return false, then we need a drain event, so set that flag.
function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {
if (!isBuf) {
var newChunk = decodeChunk(state, chunk, encoding);
if (chunk !== newChunk) {
isBuf = true;
encoding = 'buffer';
chunk = newChunk;
}
}
var len = state.objectMode ? 1 : chunk.length;
state.length += len;
var ret = state.length < state.highWaterMark; // we must ensure that previous needDrain will not be reset to false.
if (!ret) state.needDrain = true;
if (state.writing || state.corked) {
var last = state.lastBufferedRequest;
state.lastBufferedRequest = {
chunk: chunk,
encoding: encoding,
isBuf: isBuf,
callback: cb,
next: null
};
if (last) {
last.next = state.lastBufferedRequest;
} else {
state.bufferedRequest = state.lastBufferedRequest;
}
state.bufferedRequestCount += 1;
} else {
doWrite(stream, state, false, len, chunk, encoding, cb);
}
return ret;
}
function doWrite(stream, state, writev, len, chunk, encoding, cb) {
state.writelen = len;
state.writecb = cb;
state.writing = true;
state.sync = true;
if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED('write'));else if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
state.sync = false;
}
function onwriteError(stream, state, sync, er, cb) {
--state.pendingcb;
if (sync) {
// defer the callback if we are being called synchronously
// to avoid piling up things on the stack
process.nextTick(cb, er); // this can emit finish, and it will always happen
// after error
process.nextTick(finishMaybe, stream, state);
stream._writableState.errorEmitted = true;
stream.emit('error', er);
} else {
// the caller expect this to happen before if
// it is async
cb(er);
stream._writableState.errorEmitted = true;
stream.emit('error', er); // this can emit finish, but finish must
// always follow error
finishMaybe(stream, state);
}
}
function onwriteStateUpdate(state) {
state.writing = false;
state.writecb = null;
state.length -= state.writelen;
state.writelen = 0;
}
function onwrite(stream, er) {
var state = stream._writableState;
var sync = state.sync;
var cb = state.writecb;
if (typeof cb !== 'function') throw new ERR_MULTIPLE_CALLBACK();
onwriteStateUpdate(state);
if (er) onwriteError(stream, state, sync, er, cb);else {
// Check if we're actually ready to finish, but don't emit yet
var finished = needFinish(state) || stream.destroyed;
if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
clearBuffer(stream, state);
}
if (sync) {
process.nextTick(afterWrite, stream, state, finished, cb);
} else {
afterWrite(stream, state, finished, cb);
}
}
}
function afterWrite(stream, state, finished, cb) {
if (!finished) onwriteDrain(stream, state);
state.pendingcb--;
cb();
finishMaybe(stream, state);
} // Must force callback to be called on nextTick, so that we don't
// emit 'drain' before the write() consumer gets the 'false' return
// value, and has a chance to attach a 'drain' listener.
function onwriteDrain(stream, state) {
if (state.length === 0 && state.needDrain) {
state.needDrain = false;
stream.emit('drain');
}
} // if there's something in the buffer waiting, then process it
function clearBuffer(stream, state) {
state.bufferProcessing = true;
var entry = state.bufferedRequest;
if (stream._writev && entry && entry.next) {
// Fast case, write everything using _writev()
var l = state.bufferedRequestCount;
var buffer = new Array(l);
var holder = state.corkedRequestsFree;
holder.entry = entry;
var count = 0;
var allBuffers = true;
while (entry) {
buffer[count] = entry;
if (!entry.isBuf) allBuffers = false;
entry = entry.next;
count += 1;
}
buffer.allBuffers = allBuffers;
doWrite(stream, state, true, state.length, buffer, '', holder.finish); // doWrite is almost always async, defer these to save a bit of time
// as the hot path ends with doWrite
state.pendingcb++;
state.lastBufferedRequest = null;
if (holder.next) {
state.corkedRequestsFree = holder.next;
holder.next = null;
} else {
state.corkedRequestsFree = new CorkedRequest(state);
}
state.bufferedRequestCount = 0;
} else {
// Slow case, write chunks one-by-one
while (entry) {
var chunk = entry.chunk;
var encoding = entry.encoding;
var cb = entry.callback;
var len = state.objectMode ? 1 : chunk.length;
doWrite(stream, state, false, len, chunk, encoding, cb);
entry = entry.next;
state.bufferedRequestCount--; // if we didn't call the onwrite immediately, then
// it means that we need to wait until it does.
// also, that means that the chunk and cb are currently
// being processed, so move the buffer counter past them.
if (state.writing) {
break;
}
}
if (entry === null) state.lastBufferedRequest = null;
}
state.bufferedRequest = entry;
state.bufferProcessing = false;
}
Writable.prototype._write = function (chunk, encoding, cb) {
cb(new ERR_METHOD_NOT_IMPLEMENTED('_write()'));
};
Writable.prototype._writev = null;
Writable.prototype.end = function (chunk, encoding, cb) {
var state = this._writableState;
if (typeof chunk === 'function') {
cb = chunk;
chunk = null;
encoding = null;
} else if (typeof encoding === 'function') {
cb = encoding;
encoding = null;
}
if (chunk !== null && chunk !== undefined) this.write(chunk, encoding); // .end() fully uncorks
if (state.corked) {
state.corked = 1;
this.uncork();
} // ignore unnecessary end() calls.
if (!state.ending) endWritable(this, state, cb);
return this;
};
Object.defineProperty(Writable.prototype, 'writableLength', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
return this._writableState.length;
}
});
function needFinish(state) {
return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
}
function callFinal(stream, state) {
stream._final(function (err) {
state.pendingcb--;
if (err) {
stream.emit('error', err);
}
state.prefinished = true;
stream.emit('prefinish');
finishMaybe(stream, state);
});
}
function prefinish(stream, state) {
if (!state.prefinished && !state.finalCalled) {
if (typeof stream._final === 'function' && !state.destroyed) {
state.pendingcb++;
state.finalCalled = true;
process.nextTick(callFinal, stream, state);
} else {
state.prefinished = true;
stream.emit('prefinish');
}
}
}
function finishMaybe(stream, state) {
var need = needFinish(state);
if (need) {
prefinish(stream, state);
if (state.pendingcb === 0) {
state.finished = true;
stream.emit('finish');
}
}
return need;
}
function endWritable(stream, state, cb) {
state.ending = true;
finishMaybe(stream, state);
if (cb) {
if (state.finished) process.nextTick(cb);else stream.once('finish', cb);
}
state.ended = true;
stream.writable = false;
}
function onCorkedFinish(corkReq, state, err) {
var entry = corkReq.entry;
corkReq.entry = null;
while (entry) {
var cb = entry.callback;
state.pendingcb--;
cb(err);
entry = entry.next;
} // reuse the free corkReq.
state.corkedRequestsFree.next = corkReq;
}
Object.defineProperty(Writable.prototype, 'destroyed', {
// making it explicit this property is not enumerable
// because otherwise some prototype manipulation in
// userland will fail
enumerable: false,
get: function get() {
if (this._writableState === undefined) {
return false;
}
return this._writableState.destroyed;
},
set: function set(value) {
// we ignore the value if the stream
// has not been initialized yet
if (!this._writableState) {
return;
} // backward compatibility, the user is explicitly
// managing destroyed
this._writableState.destroyed = value;
}
});
Writable.prototype.destroy = destroyImpl.destroy;
Writable.prototype._undestroy = destroyImpl.undestroy;
Writable.prototype._destroy = function (err, cb) {
cb(err);
};
}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"../errors":25,"./_stream_duplex":27,"./internal/streams/destroy":34,"./internal/streams/state":37,"./internal/streams/stream":38,"_process":23,"buffer":16,"inherits":20,"util-deprecate":48}],32:[function(require,module,exports){
(function (process){
'use strict';
var _Object$setPrototypeO;
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
var finished = require('./end-of-stream');
var kLastResolve = Symbol('lastResolve');
var kLastReject = Symbol('lastReject');
var kError = Symbol('error');
var kEnded = Symbol('ended');
var kLastPromise = Symbol('lastPromise');
var kHandlePromise = Symbol('handlePromise');
var kStream = Symbol('stream');
function createIterResult(value, done) {
return {
value: value,
done: done
};
}
function readAndResolve(iter) {
var resolve = iter[kLastResolve];
if (resolve !== null) {
var data = iter[kStream].read(); // we defer if data is null
// we can be expecting either 'end' or
// 'error'
if (data !== null) {
iter[kLastPromise] = null;
iter[kLastResolve] = null;
iter[kLastReject] = null;
resolve(createIterResult(data, false));
}
}
}
function onReadable(iter) {
// we wait for the next tick, because it might
// emit an error with process.nextTick
process.nextTick(readAndResolve, iter);
}
function wrapForNext(lastPromise, iter) {
return function (resolve, reject) {
lastPromise.then(function () {
if (iter[kEnded]) {
resolve(createIterResult(undefined, true));
return;
}
iter[kHandlePromise](resolve, reject);
}, reject);
};
}
var AsyncIteratorPrototype = Object.getPrototypeOf(function () {});
var ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf((_Object$setPrototypeO = {
get stream() {
return this[kStream];
},
next: function next() {
var _this = this;
// if we have detected an error in the meanwhile
// reject straight away
var error = this[kError];
if (error !== null) {
return Promise.reject(error);
}
if (this[kEnded]) {
return Promise.resolve(createIterResult(undefined, true));
}
if (this[kStream].destroyed) {
// We need to defer via nextTick because if .destroy(err) is
// called, the error will be emitted via nextTick, and
// we cannot guarantee that there is no error lingering around
// waiting to be emitted.
return new Promise(function (resolve, reject) {
process.nextTick(function () {
if (_this[kError]) {
reject(_this[kError]);
} else {
resolve(createIterResult(undefined, true));
}
});
});
} // if we have multiple next() calls
// we will wait for the previous Promise to finish
// this logic is optimized to support for await loops,
// where next() is only called once at a time
var lastPromise = this[kLastPromise];
var promise;
if (lastPromise) {
promise = new Promise(wrapForNext(lastPromise, this));
} else {
// fast path needed to support multiple this.push()
// without triggering the next() queue
var data = this[kStream].read();
if (data !== null) {
return Promise.resolve(createIterResult(data, false));
}
promise = new Promise(this[kHandlePromise]);
}
this[kLastPromise] = promise;
return promise;
}
}, _defineProperty(_Object$setPrototypeO, Symbol.asyncIterator, function () {
return this;
}), _defineProperty(_Object$setPrototypeO, "return", function _return() {
var _this2 = this;
// destroy(err, cb) is a private API
// we can guarantee we have that here, because we control the
// Readable class this is attached to
return new Promise(function (resolve, reject) {
_this2[kStream].destroy(null, function (err) {
if (err) {
reject(err);
return;
}
resolve(createIterResult(undefined, true));
});
});
}), _Object$setPrototypeO), AsyncIteratorPrototype);
var createReadableStreamAsyncIterator = function createReadableStreamAsyncIterator(stream) {
var _Object$create;
var iterator = Object.create(ReadableStreamAsyncIteratorPrototype, (_Object$create = {}, _defineProperty(_Object$create, kStream, {
value: stream,
writable: true
}), _defineProperty(_Object$create, kLastResolve, {
value: null,
writable: true
}), _defineProperty(_Object$create, kLastReject, {
value: null,
writable: true
}), _defineProperty(_Object$create, kError, {
value: null,
writable: true
}), _defineProperty(_Object$create, kEnded, {
value: stream._readableState.endEmitted,
writable: true
}), _defineProperty(_Object$create, kHandlePromise, {
value: function value(resolve, reject) {
var data = iterator[kStream].read();
if (data) {
iterator[kLastPromise] = null;
iterator[kLastResolve] = null;
iterator[kLastReject] = null;
resolve(createIterResult(data, false));
} else {
iterator[kLastResolve] = resolve;
iterator[kLastReject] = reject;
}
},
writable: true
}), _Object$create));
iterator[kLastPromise] = null;
finished(stream, function (err) {
if (err && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {
var reject = iterator[kLastReject]; // reject if we are waiting for data in the Promise
// returned by next() and store the error
if (reject !== null) {
iterator[kLastPromise] = null;
iterator[kLastResolve] = null;
iterator[kLastReject] = null;
reject(err);
}
iterator[kError] = err;
return;
}
var resolve = iterator[kLastResolve];
if (resolve !== null) {
iterator[kLastPromise] = null;
iterator[kLastResolve] = null;
iterator[kLastReject] = null;
resolve(createIterResult(undefined, true));
}
iterator[kEnded] = true;
});
stream.on('readable', onReadable.bind(null, iterator));
return iterator;
};
module.exports = createReadableStreamAsyncIterator;
}).call(this,require('_process'))
},{"./end-of-stream":35,"_process":23}],33:[function(require,module,exports){
'use strict';
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
var _require = require('buffer'),
Buffer = _require.Buffer;
var _require2 = require('util'),
inspect = _require2.inspect;
var custom = inspect && inspect.custom || 'inspect';
function copyBuffer(src, target, offset) {
Buffer.prototype.copy.call(src, target, offset);
}
module.exports =
/*#__PURE__*/
function () {
function BufferList() {
this.head = null;
this.tail = null;
this.length = 0;
}
var _proto = BufferList.prototype;
_proto.push = function push(v) {
var entry = {
data: v,
next: null
};
if (this.length > 0) this.tail.next = entry;else this.head = entry;
this.tail = entry;
++this.length;
};
_proto.unshift = function unshift(v) {
var entry = {
data: v,
next: this.head
};
if (this.length === 0) this.tail = entry;
this.head = entry;
++this.length;
};
_proto.shift = function shift() {
if (this.length === 0) return;
var ret = this.head.data;
if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
--this.length;
return ret;
};
_proto.clear = function clear() {
this.head = this.tail = null;
this.length = 0;
};
_proto.join = function join(s) {
if (this.length === 0) return '';
var p = this.head;
var ret = '' + p.data;
while (p = p.next) {
ret += s + p.data;
}
return ret;
};
_proto.concat = function concat(n) {
if (this.length === 0) return Buffer.alloc(0);
var ret = Buffer.allocUnsafe(n >>> 0);
var p = this.head;
var i = 0;
while (p) {
copyBuffer(p.data, ret, i);
i += p.data.length;
p = p.next;
}
return ret;
} // Consumes a specified amount of bytes or characters from the buffered data.
;
_proto.consume = function consume(n, hasStrings) {
var ret;
if (n < this.head.data.length) {
// `slice` is the same for buffers and strings.
ret = this.head.data.slice(0, n);
this.head.data = this.head.data.slice(n);
} else if (n === this.head.data.length) {
// First chunk is a perfect match.
ret = this.shift();
} else {
// Result spans more than one buffer.
ret = hasStrings ? this._getString(n) : this._getBuffer(n);
}
return ret;
};
_proto.first = function first() {
return this.head.data;
} // Consumes a specified amount of characters from the buffered data.
;
_proto._getString = function _getString(n) {
var p = this.head;
var c = 1;
var ret = p.data;
n -= ret.length;
while (p = p.next) {
var str = p.data;
var nb = n > str.length ? str.length : n;
if (nb === str.length) ret += str;else ret += str.slice(0, n);
n -= nb;
if (n === 0) {
if (nb === str.length) {
++c;
if (p.next) this.head = p.next;else this.head = this.tail = null;
} else {
this.head = p;
p.data = str.slice(nb);
}
break;
}
++c;
}
this.length -= c;
return ret;
} // Consumes a specified amount of bytes from the buffered data.
;
_proto._getBuffer = function _getBuffer(n) {
var ret = Buffer.allocUnsafe(n);
var p = this.head;
var c = 1;
p.data.copy(ret);
n -= p.data.length;
while (p = p.next) {
var buf = p.data;
var nb = n > buf.length ? buf.length : n;
buf.copy(ret, ret.length - n, 0, nb);
n -= nb;
if (n === 0) {
if (nb === buf.length) {
++c;
if (p.next) this.head = p.next;else this.head = this.tail = null;
} else {
this.head = p;
p.data = buf.slice(nb);
}
break;
}
++c;
}
this.length -= c;
return ret;
} // Make sure the linked list only shows the minimal necessary information.
;
_proto[custom] = function (_, options) {
return inspect(this, _objectSpread({}, options, {
// Only inspect one level.
depth: 0,
// It should not recurse.
customInspect: false
}));
};
return BufferList;
}();
},{"buffer":16,"util":15}],34:[function(require,module,exports){
(function (process){
'use strict'; // undocumented cb() API, needed for core, not for public API
function destroy(err, cb) {
var _this = this;
var readableDestroyed = this._readableState && this._readableState.destroyed;
var writableDestroyed = this._writableState && this._writableState.destroyed;
if (readableDestroyed || writableDestroyed) {
if (cb) {
cb(err);
} else if (err && (!this._writableState || !this._writableState.errorEmitted)) {
process.nextTick(emitErrorNT, this, err);
}
return this;
} // we set destroyed to true before firing error callbacks in order
// to make it re-entrance safe in case destroy() is called within callbacks
if (this._readableState) {
this._readableState.destroyed = true;
} // if this is a duplex stream mark the writable part as destroyed as well
if (this._writableState) {
this._writableState.destroyed = true;
}
this._destroy(err || null, function (err) {
if (!cb && err) {
process.nextTick(emitErrorAndCloseNT, _this, err);
if (_this._writableState) {
_this._writableState.errorEmitted = true;
}
} else if (cb) {
process.nextTick(emitCloseNT, _this);
cb(err);
} else {
process.nextTick(emitCloseNT, _this);
}
});
return this;
}
function emitErrorAndCloseNT(self, err) {
emitErrorNT(self, err);
emitCloseNT(self);
}
function emitCloseNT(self) {
if (self._writableState && !self._writableState.emitClose) return;
if (self._readableState && !self._readableState.emitClose) return;
self.emit('close');
}
function undestroy() {
if (this._readableState) {
this._readableState.destroyed = false;
this._readableState.reading = false;
this._readableState.ended = false;
this._readableState.endEmitted = false;
}
if (this._writableState) {
this._writableState.destroyed = false;
this._writableState.ended = false;
this._writableState.ending = false;
this._writableState.finalCalled = false;
this._writableState.prefinished = false;
this._writableState.finished = false;
this._writableState.errorEmitted = false;
}
}
function emitErrorNT(self, err) {
self.emit('error', err);
}
module.exports = {
destroy: destroy,
undestroy: undestroy
};
}).call(this,require('_process'))
},{"_process":23}],35:[function(require,module,exports){
// Ported from https://github.com/mafintosh/end-of-stream with
// permission from the author, Mathias Buus (@mafintosh).
'use strict';
var ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;
function once(callback) {
var called = false;
return function () {
if (called) return;
called = true;
for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
callback.apply(this, args);
};
}
function noop() {}
function isRequest(stream) {
return stream.setHeader && typeof stream.abort === 'function';
}
function eos(stream, opts, callback) {
if (typeof opts === 'function') return eos(stream, null, opts);
if (!opts) opts = {};
callback = once(callback || noop);
var readable = opts.readable || opts.readable !== false && stream.readable;
var writable = opts.writable || opts.writable !== false && stream.writable;
var onlegacyfinish = function onlegacyfinish() {
if (!stream.writable) onfinish();
};
var writableEnded = stream._writableState && stream._writableState.finished;
var onfinish = function onfinish() {
writable = false;
writableEnded = true;
if (!readable) callback.call(stream);
};
var readableEnded = stream._readableState && stream._readableState.endEmitted;
var onend = function onend() {
readable = false;
readableEnded = true;
if (!writable) callback.call(stream);
};
var onerror = function onerror(err) {
callback.call(stream, err);
};
var onclose = function onclose() {
var err;
if (readable && !readableEnded) {
if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
return callback.call(stream, err);
}
if (writable && !writableEnded) {
if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
return callback.call(stream, err);
}
};
var onrequest = function onrequest() {
stream.req.on('finish', onfinish);
};
if (isRequest(stream)) {
stream.on('complete', onfinish);
stream.on('abort', onclose);
if (stream.req) onrequest();else stream.on('request', onrequest);
} else if (writable && !stream._writableState) {
// legacy streams
stream.on('end', onlegacyfinish);
stream.on('close', onlegacyfinish);
}
stream.on('end', onend);
stream.on('finish', onfinish);
if (opts.error !== false) stream.on('error', onerror);
stream.on('close', onclose);
return function () {
stream.removeListener('complete', onfinish);
stream.removeListener('abort', onclose);
stream.removeListener('request', onrequest);
if (stream.req) stream.req.removeListener('finish', onfinish);
stream.removeListener('end', onlegacyfinish);
stream.removeListener('close', onlegacyfinish);
stream.removeListener('finish', onfinish);
stream.removeListener('end', onend);
stream.removeListener('error', onerror);
stream.removeListener('close', onclose);
};
}
module.exports = eos;
},{"../../../errors":25}],36:[function(require,module,exports){
// Ported from https://github.com/mafintosh/pump with
// permission from the author, Mathias Buus (@mafintosh).
'use strict';
var eos;
function once(callback) {
var called = false;
return function () {
if (called) return;
called = true;
callback.apply(void 0, arguments);
};
}
var _require$codes = require('../../../errors').codes,
ERR_MISSING_ARGS = _require$codes.ERR_MISSING_ARGS,
ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED;
function noop(err) {
// Rethrow the error if it exists to avoid swallowing it
if (err) throw err;
}
function isRequest(stream) {
return stream.setHeader && typeof stream.abort === 'function';
}
function destroyer(stream, reading, writing, callback) {
callback = once(callback);
var closed = false;
stream.on('close', function () {
closed = true;
});
if (eos === undefined) eos = require('./end-of-stream');
eos(stream, {
readable: reading,
writable: writing
}, function (err) {
if (err) return callback(err);
closed = true;
callback();
});
var destroyed = false;
return function (err) {
if (closed) return;
if (destroyed) return;
destroyed = true; // request.destroy just do .end - .abort is what we want
if (isRequest(stream)) return stream.abort();
if (typeof stream.destroy === 'function') return stream.destroy();
callback(err || new ERR_STREAM_DESTROYED('pipe'));
};
}
function call(fn) {
fn();
}
function pipe(from, to) {
return from.pipe(to);
}
function popCallback(streams) {
if (!streams.length) return noop;
if (typeof streams[streams.length - 1] !== 'function') return noop;
return streams.pop();
}
function pipeline() {
for (var _len = arguments.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {
streams[_key] = arguments[_key];
}
var callback = popCallback(streams);
if (Array.isArray(streams[0])) streams = streams[0];
if (streams.length < 2) {
throw new ERR_MISSING_ARGS('streams');
}
var error;
var destroys = streams.map(function (stream, i) {
var reading = i < streams.length - 1;
var writing = i > 0;
return destroyer(stream, reading, writing, function (err) {
if (!error) error = err;
if (err) destroys.forEach(call);
if (reading) return;
destroys.forEach(call);
callback(error);
});
});
return streams.reduce(pipe);
}
module.exports = pipeline;
},{"../../../errors":25,"./end-of-stream":35}],37:[function(require,module,exports){
'use strict';
var ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;
function highWaterMarkFrom(options, isDuplex, duplexKey) {
return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
}
function getHighWaterMark(state, options, duplexKey, isDuplex) {
var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
if (hwm != null) {
if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {
var name = isDuplex ? duplexKey : 'highWaterMark';
throw new ERR_INVALID_OPT_VALUE(name, hwm);
}
return Math.floor(hwm);
} // Default value
return state.objectMode ? 16 : 16 * 1024;
}
module.exports = {
getHighWaterMark: getHighWaterMark
};
},{"../../../errors":25}],38:[function(require,module,exports){
module.exports = require('events').EventEmitter;
},{"events":"events"}],39:[function(require,module,exports){
exports = module.exports = require('./lib/_stream_readable.js');
exports.Stream = exports;
exports.Readable = exports;
exports.Writable = require('./lib/_stream_writable.js');
exports.Duplex = require('./lib/_stream_duplex.js');
exports.Transform = require('./lib/_stream_transform.js');
exports.PassThrough = require('./lib/_stream_passthrough.js');
exports.finished = require('./lib/internal/streams/end-of-stream.js');
exports.pipeline = require('./lib/internal/streams/pipeline.js');
},{"./lib/_stream_duplex.js":27,"./lib/_stream_passthrough.js":28,"./lib/_stream_readable.js":29,"./lib/_stream_transform.js":30,"./lib/_stream_writable.js":31,"./lib/internal/streams/end-of-stream.js":35,"./lib/internal/streams/pipeline.js":36}],40:[function(require,module,exports){
(function (process){
module.exports = runParallel
function runParallel (tasks, cb) {
var results, pending, keys
var isSync = true
if (Array.isArray(tasks)) {
results = []
pending = tasks.length
} else {
keys = Object.keys(tasks)
results = {}
pending = keys.length
}
function done (err) {
function end () {
if (cb) cb(err, results)
cb = null
}
if (isSync) process.nextTick(end)
else end()
}
function each (i, err, result) {
results[i] = result
if (--pending === 0 || err) {
done(err)
}
}
if (!pending) {
// empty
done(null)
} else if (keys) {
// object
keys.forEach(function (key) {
tasks[key](function (err, result) { each(key, err, result) })
})
} else {
// array
tasks.forEach(function (task, i) {
task(function (err, result) { each(i, err, result) })
})
}
isSync = false
}
}).call(this,require('_process'))
},{"_process":23}],41:[function(require,module,exports){
/* eslint-disable node/no-deprecated-api */
var buffer = require('buffer')
var Buffer = buffer.Buffer
// alternative to using Object.keys for old browsers
function copyProps (src, dst) {
for (var key in src) {
dst[key] = src[key]
}
}
if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
module.exports = buffer
} else {
// Copy properties from require('buffer')
copyProps(buffer, exports)
exports.Buffer = SafeBuffer
}
function SafeBuffer (arg, encodingOrOffset, length) {
return Buffer(arg, encodingOrOffset, length)
}
SafeBuffer.prototype = Object.create(Buffer.prototype)
// Copy static methods from Buffer
copyProps(Buffer, SafeBuffer)
SafeBuffer.from = function (arg, encodingOrOffset, length) {
if (typeof arg === 'number') {
throw new TypeError('Argument must not be a number')
}
return Buffer(arg, encodingOrOffset, length)
}
SafeBuffer.alloc = function (size, fill, encoding) {
if (typeof size !== 'number') {
throw new TypeError('Argument must be a number')
}
var buf = Buffer(size)
if (fill !== undefined) {
if (typeof encoding === 'string') {
buf.fill(fill, encoding)
} else {
buf.fill(fill)
}
} else {
buf.fill(0)
}
return buf
}
SafeBuffer.allocUnsafe = function (size) {
if (typeof size !== 'number') {
throw new TypeError('Argument must be a number')
}
return Buffer(size)
}
SafeBuffer.allocUnsafeSlow = function (size) {
if (typeof size !== 'number') {
throw new TypeError('Argument must be a number')
}
return buffer.SlowBuffer(size)
}
},{"buffer":16}],42:[function(require,module,exports){
var Buffer = require('safe-buffer').Buffer
// prototype class for hash functions
function Hash (blockSize, finalSize) {
this._block = Buffer.alloc(blockSize)
this._finalSize = finalSize
this._blockSize = blockSize
this._len = 0
}
Hash.prototype.update = function (data, enc) {
if (typeof data === 'string') {
enc = enc || 'utf8'
data = Buffer.from(data, enc)
}
var block = this._block
var blockSize = this._blockSize
var length = data.length
var accum = this._len
for (var offset = 0; offset < length;) {
var assigned = accum % blockSize
var remainder = Math.min(length - offset, blockSize - assigned)
for (var i = 0; i < remainder; i++) {
block[assigned + i] = data[offset + i]
}
accum += remainder
offset += remainder
if ((accum % blockSize) === 0) {
this._update(block)
}
}
this._len += length
return this
}
Hash.prototype.digest = function (enc) {
var rem = this._len % this._blockSize
this._block[rem] = 0x80
// zero (rem + 1) trailing bits, where (rem + 1) is the smallest
// non-negative solution to the equation (length + 1 + (rem + 1)) === finalSize mod blockSize
this._block.fill(0, rem + 1)
if (rem >= this._finalSize) {
this._update(this._block)
this._block.fill(0)
}
var bits = this._len * 8
// uint32
if (bits <= 0xffffffff) {
this._block.writeUInt32BE(bits, this._blockSize - 4)
// uint64
} else {
var lowBits = (bits & 0xffffffff) >>> 0
var highBits = (bits - lowBits) / 0x100000000
this._block.writeUInt32BE(highBits, this._blockSize - 8)
this._block.writeUInt32BE(lowBits, this._blockSize - 4)
}
this._update(this._block)
var hash = this._hash()
return enc ? hash.toString(enc) : hash
}
Hash.prototype._update = function () {
throw new Error('_update must be implemented by subclass')
}
module.exports = Hash
},{"safe-buffer":41}],43:[function(require,module,exports){
/*
* A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
* in FIPS PUB 180-1
* Version 2.1a Copyright Paul Johnston 2000 - 2002.
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
* Distributed under the BSD License
* See http://pajhome.org.uk/crypt/md5 for details.
*/
var inherits = require('inherits')
var Hash = require('./hash')
var Buffer = require('safe-buffer').Buffer
var K = [
0x5a827999, 0x6ed9eba1, 0x8f1bbcdc | 0, 0xca62c1d6 | 0
]
var W = new Array(80)
function Sha1 () {
this.init()
this._w = W
Hash.call(this, 64, 56)
}
inherits(Sha1, Hash)
Sha1.prototype.init = function () {
this._a = 0x67452301
this._b = 0xefcdab89
this._c = 0x98badcfe
this._d = 0x10325476
this._e = 0xc3d2e1f0
return this
}
function rotl1 (num) {
return (num << 1) | (num >>> 31)
}
function rotl5 (num) {
return (num << 5) | (num >>> 27)
}
function rotl30 (num) {
return (num << 30) | (num >>> 2)
}
function ft (s, b, c, d) {
if (s === 0) return (b & c) | ((~b) & d)
if (s === 2) return (b & c) | (b & d) | (c & d)
return b ^ c ^ d
}
Sha1.prototype._update = function (M) {
var W = this._w
var a = this._a | 0
var b = this._b | 0
var c = this._c | 0
var d = this._d | 0
var e = this._e | 0
for (var i = 0; i < 16; ++i) W[i] = M.readInt32BE(i * 4)
for (; i < 80; ++i) W[i] = rotl1(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16])
for (var j = 0; j < 80; ++j) {
var s = ~~(j / 20)
var t = (rotl5(a) + ft(s, b, c, d) + e + W[j] + K[s]) | 0
e = d
d = c
c = rotl30(b)
b = a
a = t
}
this._a = (a + this._a) | 0
this._b = (b + this._b) | 0
this._c = (c + this._c) | 0
this._d = (d + this._d) | 0
this._e = (e + this._e) | 0
}
Sha1.prototype._hash = function () {
var H = Buffer.allocUnsafe(20)
H.writeInt32BE(this._a | 0, 0)
H.writeInt32BE(this._b | 0, 4)
H.writeInt32BE(this._c | 0, 8)
H.writeInt32BE(this._d | 0, 12)
H.writeInt32BE(this._e | 0, 16)
return H
}
module.exports = Sha1
},{"./hash":42,"inherits":20,"safe-buffer":41}],44:[function(require,module,exports){
(function (Buffer){
module.exports = Peer
var debug = require('debug')('simple-peer')
var getBrowserRTC = require('get-browser-rtc')
var inherits = require('inherits')
var randombytes = require('randombytes')
var stream = require('readable-stream')
var MAX_BUFFERED_AMOUNT = 64 * 1024
var ICECOMPLETE_TIMEOUT = 5 * 1000
var CHANNEL_CLOSING_TIMEOUT = 5 * 1000
inherits(Peer, stream.Duplex)
/**
* WebRTC peer connection. Same API as node core `net.Socket`, plus a few extra methods.
* Duplex stream.
* @param {Object} opts
*/
function Peer (opts) {
var self = this
if (!(self instanceof Peer)) return new Peer(opts)
self._id = randombytes(4).toString('hex').slice(0, 7)
self._debug('new peer %o', opts)
opts = Object.assign({
allowHalfOpen: false
}, opts)
stream.Duplex.call(self, opts)
self.channelName = opts.initiator
? opts.channelName || randombytes(20).toString('hex')
: null
self.initiator = opts.initiator || false
self.channelConfig = opts.channelConfig || Peer.channelConfig
self.config = Object.assign({}, Peer.config, opts.config)
self.offerOptions = opts.offerOptions || {}
self.answerOptions = opts.answerOptions || {}
self.sdpTransform = opts.sdpTransform || function (sdp) { return sdp }
self.streams = opts.streams || (opts.stream ? [opts.stream] : []) // support old "stream" option
self.trickle = opts.trickle !== undefined ? opts.trickle : true
self.allowHalfTrickle = opts.allowHalfTrickle !== undefined ? opts.allowHalfTrickle : false
self.iceCompleteTimeout = opts.iceCompleteTimeout || ICECOMPLETE_TIMEOUT
self.destroyed = false
self._connected = false
self.remoteAddress = undefined
self.remoteFamily = undefined
self.remotePort = undefined
self.localAddress = undefined
self.localFamily = undefined
self.localPort = undefined
self._wrtc = (opts.wrtc && typeof opts.wrtc === 'object')
? opts.wrtc
: getBrowserRTC()
if (!self._wrtc) {
if (typeof window === 'undefined') {
throw makeError('No WebRTC support: Specify `opts.wrtc` option in this environment', 'ERR_WEBRTC_SUPPORT')
} else {
throw makeError('No WebRTC support: Not a supported browser', 'ERR_WEBRTC_SUPPORT')
}
}
self._pcReady = false
self._channelReady = false
self._iceComplete = false // ice candidate trickle done (got null candidate)
self._iceCompleteTimer = null // send an offer/answer anyway after some timeout
self._channel = null
self._pendingCandidates = []
self._isNegotiating = !self.initiator // is this peer waiting for negotiation to complete?
self._batchedNegotiation = false // batch synchronous negotiations
self._queuedNegotiation = false // is there a queued negotiation request?
self._sendersAwaitingStable = []
self._senderMap = new Map()
self._firstStable = true
self._closingInterval = null
self._remoteTracks = []
self._remoteStreams = []
self._chunk = null
self._cb = null
self._interval = null
try {
self._pc = new (self._wrtc.RTCPeerConnection)(self.config)
} catch (err) {
setTimeout(() => self.destroy(err), 0)
return
}
// We prefer feature detection whenever possible, but sometimes that's not
// possible for certain implementations.
self._isReactNativeWebrtc = typeof self._pc._peerConnectionId === 'number'
self._pc.oniceconnectionstatechange = function () {
self._onIceStateChange()
}
self._pc.onicegatheringstatechange = function () {
self._onIceStateChange()
}
self._pc.onsignalingstatechange = function () {
self._onSignalingStateChange()
}
self._pc.onicecandidate = function (event) {
self._onIceCandidate(event)
}
// Other spec events, unused by this implementation:
// - onconnectionstatechange
// - onicecandidateerror
// - onfingerprintfailure
// - onnegotiationneeded
if (self.initiator) {
self._setupData({
channel: self._pc.createDataChannel(self.channelName, self.channelConfig)
})
} else {
self._pc.ondatachannel = function (event) {
self._setupData(event)
}
}
if (self.streams) {
self.streams.forEach(function (stream) {
self.addStream(stream)
})
}
self._pc.ontrack = function (event) {
self._onTrack(event)
}
if (self.initiator) {
self._needsNegotiation()
}
self._onFinishBound = function () {
self._onFinish()
}
self.once('finish', self._onFinishBound)
}
Peer.WEBRTC_SUPPORT = !!getBrowserRTC()
/**
* Expose peer and data channel config for overriding all Peer
* instances. Otherwise, just set opts.config or opts.channelConfig
* when constructing a Peer.
*/
Peer.config = {
iceServers: [
{
urls: 'stun:stun.l.google.com:19302'
},
{
urls: 'stun:global.stun.twilio.com:3478?transport=udp'
}
],
sdpSemantics: 'unified-plan'
}
Peer.channelConfig = {}
Object.defineProperty(Peer.prototype, 'bufferSize', {
get: function () {
var self = this
return (self._channel && self._channel.bufferedAmount) || 0
}
})
// HACK: it's possible channel.readyState is "closing" before peer.destroy() fires
// https://bugs.chromium.org/p/chromium/issues/detail?id=882743
Object.defineProperty(Peer.prototype, 'connected', {
get: function () {
var self = this
return (self._connected && self._channel.readyState === 'open')
}
})
Peer.prototype.address = function () {
var self = this
return { port: self.localPort, family: self.localFamily, address: self.localAddress }
}
Peer.prototype.signal = function (data) {
var self = this
if (self.destroyed) throw makeError('cannot signal after peer is destroyed', 'ERR_SIGNALING')
if (typeof data === 'string') {
try {
data = JSON.parse(data)
} catch (err) {
data = {}
}
}
self._debug('signal()')
if (data.renegotiate && self.initiator) {
self._debug('got request to renegotiate')
self._needsNegotiation()
}
if (data.transceiverRequest && self.initiator) {
self._debug('got request for transceiver')
self.addTransceiver(data.transceiverRequest.kind, data.transceiverRequest.init)
}
if (data.candidate) {
if (self._pc.localDescription && self._pc.localDescription.type && self._pc.remoteDescription && self._pc.remoteDescription.type) {
self._addIceCandidate(data.candidate)
} else {
self._pendingCandidates.push(data.candidate)
}
}
if (data.sdp) {
self._pc.setRemoteDescription(new (self._wrtc.RTCSessionDescription)(data)).then(function () {
if (self.destroyed) return
self._pendingCandidates.forEach(function (candidate) {
self._addIceCandidate(candidate)
})
self._pendingCandidates = []
if (self._pc.remoteDescription.type === 'offer') self._createAnswer()
}).catch(function (err) { self.destroy(makeError(err, 'ERR_SET_REMOTE_DESCRIPTION')) })
}
if (!data.sdp && !data.candidate && !data.renegotiate && !data.transceiverRequest) {
self.destroy(makeError('signal() called with invalid signal data', 'ERR_SIGNALING'))
}
}
Peer.prototype._addIceCandidate = function (candidate) {
var self = this
var iceCandidateObj = new self._wrtc.RTCIceCandidate(candidate)
self._pc.addIceCandidate(iceCandidateObj).catch(function (err) {
if (!iceCandidateObj.address || iceCandidateObj.address.endsWith('.local')) {
warn('Ignoring unsupported ICE candidate.')
} else {
self.destroy(makeError(err, 'ERR_ADD_ICE_CANDIDATE'))
}
})
}
/**
* Send text/binary data to the remote peer.
* @param {ArrayBufferView|ArrayBuffer|Buffer|string|Blob} chunk
*/
Peer.prototype.send = function (chunk) {
var self = this
self._channel.send(chunk)
}
/**
* Add a Transceiver to the connection.
* @param {String} kind
* @param {Object} init
*/
Peer.prototype.addTransceiver = function (kind, init) {
var self = this
self._debug('addTransceiver()')
if (self.initiator) {
try {
self._pc.addTransceiver(kind, init)
self._needsNegotiation()
} catch (err) {
self.destroy(err)
}
} else {
self.emit('signal', { // request initiator to renegotiate
transceiverRequest: { kind, init }
})
}
}
/**
* Add a MediaStream to the connection.
* @param {MediaStream} stream
*/
Peer.prototype.addStream = function (stream) {
var self = this
self._debug('addStream()')
stream.getTracks().forEach(function (track) {
self.addTrack(track, stream)
})
}
/**
* Add a MediaStreamTrack to the connection.
* @param {MediaStreamTrack} track
* @param {MediaStream} stream
*/
Peer.prototype.addTrack = function (track, stream) {
var self = this
self._debug('addTrack()')
var submap = self._senderMap.get(track) || new Map() // nested Maps map [track, stream] to sender
var sender = submap.get(stream)
if (!sender) {
sender = self._pc.addTrack(track, stream)
submap.set(stream, sender)
self._senderMap.set(track, submap)
self._needsNegotiation()
} else if (sender.removed) {
self.destroy(makeError('Track has been removed. You should enable/disable tracks that you want to re-add.', 'ERR_SENDER_REMOVED'))
} else {
self.destroy(makeError('Track has already been added to that stream.', 'ERR_SENDER_ALREADY_ADDED'))
}
}
/**
* Replace a MediaStreamTrack by another in the connection.
* @param {MediaStreamTrack} oldTrack
* @param {MediaStreamTrack} newTrack
* @param {MediaStream} stream
*/
Peer.prototype.replaceTrack = function (oldTrack, newTrack, stream) {
var self = this
self._debug('replaceTrack()')
var submap = self._senderMap.get(oldTrack)
var sender = submap ? submap.get(stream) : null
if (!sender) {
self.destroy(makeError('Cannot replace track that was never added.', 'ERR_TRACK_NOT_ADDED'))
}
if (newTrack) self._senderMap.set(newTrack, submap)
if (sender.replaceTrack != null) {
sender.replaceTrack(newTrack)
} else {
self.destroy(makeError('replaceTrack is not supported in this browser', 'ERR_UNSUPPORTED_REPLACETRACK'))
}
}
/**
* Remove a MediaStreamTrack from the connection.
* @param {MediaStreamTrack} track
* @param {MediaStream} stream
*/
Peer.prototype.removeTrack = function (track, stream) {
var self = this
self._debug('removeSender()')
var submap = self._senderMap.get(track)
var sender = submap ? submap.get(stream) : null
if (!sender) {
self.destroy(makeError('Cannot remove track that was never added.', 'ERR_TRACK_NOT_ADDED'))
}
try {
sender.removed = true
self._pc.removeTrack(sender)
} catch (err) {
if (err.name === 'NS_ERROR_UNEXPECTED') {
self._sendersAwaitingStable.push(sender) // HACK: Firefox must wait until (signalingState === stable) https://bugzilla.mozilla.org/show_bug.cgi?id=1133874
} else {
self.destroy(err)
}
}
self._needsNegotiation()
}
/**
* Remove a MediaStream from the connection.
* @param {MediaStream} stream
*/
Peer.prototype.removeStream = function (stream) {
var self = this
self._debug('removeSenders()')
stream.getTracks().forEach(function (track) {
self.removeTrack(track, stream)
})
}
Peer.prototype._needsNegotiation = function () {
var self = this
self._debug('_needsNegotiation')
if (self._batchedNegotiation) return // batch synchronous renegotiations
self._batchedNegotiation = true
setTimeout(function () {
self._batchedNegotiation = false
self._debug('starting batched negotiation')
self.negotiate()
}, 0)
}
Peer.prototype.negotiate = function () {
var self = this
if (self.initiator) {
if (self._isNegotiating) {
self._queuedNegotiation = true
self._debug('already negotiating, queueing')
} else {
self._debug('start negotiation')
setTimeout(() => { // HACK: Chrome crashes if we immediately call createOffer
self._createOffer()
}, 0)
}
} else {
if (!self._isNegotiating) {
self._debug('requesting negotiation from initiator')
self.emit('signal', { // request initiator to renegotiate
renegotiate: true
})
}
}
self._isNegotiating = true
}
// TODO: Delete this method once readable-stream is updated to contain a default
// implementation of destroy() that automatically calls _destroy()
// See: https://github.com/nodejs/readable-stream/issues/283
Peer.prototype.destroy = function (err) {
var self = this
self._destroy(err, function () {})
}
Peer.prototype._destroy = function (err, cb) {
var self = this
if (self.destroyed) return
self._debug('destroy (error: %s)', err && (err.message || err))
self.readable = self.writable = false
if (!self._readableState.ended) self.push(null)
if (!self._writableState.finished) self.end()
self.destroyed = true
self._connected = false
self._pcReady = false
self._channelReady = false
self._remoteTracks = null
self._remoteStreams = null
self._senderMap = null
clearInterval(self._closingInterval)
self._closingInterval = null
clearInterval(self._interval)
self._interval = null
self._chunk = null
self._cb = null
if (self._onFinishBound) self.removeListener('finish', self._onFinishBound)
self._onFinishBound = null
if (self._channel) {
try {
self._channel.close()
} catch (err) {}
self._channel.onmessage = null
self._channel.onopen = null
self._channel.onclose = null
self._channel.onerror = null
}
if (self._pc) {
try {
self._pc.close()
} catch (err) {}
self._pc.oniceconnectionstatechange = null
self._pc.onicegatheringstatechange = null
self._pc.onsignalingstatechange = null
self._pc.onicecandidate = null
self._pc.ontrack = null
self._pc.ondatachannel = null
}
self._pc = null
self._channel = null
if (err) self.emit('error', err)
self.emit('close')
cb()
}
Peer.prototype._setupData = function (event) {
var self = this
if (!event.channel) {
// In some situations `pc.createDataChannel()` returns `undefined` (in wrtc),
// which is invalid behavior. Handle it gracefully.
// See: https://github.com/feross/simple-peer/issues/163
return self.destroy(makeError('Data channel event is missing `channel` property', 'ERR_DATA_CHANNEL'))
}
self._channel = event.channel
self._channel.binaryType = 'arraybuffer'
if (typeof self._channel.bufferedAmountLowThreshold === 'number') {
self._channel.bufferedAmountLowThreshold = MAX_BUFFERED_AMOUNT
}
self.channelName = self._channel.label
self._channel.onmessage = function (event) {
self._onChannelMessage(event)
}
self._channel.onbufferedamountlow = function () {
self._onChannelBufferedAmountLow()
}
self._channel.onopen = function () {
self._onChannelOpen()
}
self._channel.onclose = function () {
self._onChannelClose()
}
self._channel.onerror = function (err) {
self.destroy(makeError(err, 'ERR_DATA_CHANNEL'))
}
// HACK: Chrome will sometimes get stuck in readyState "closing", let's check for this condition
// https://bugs.chromium.org/p/chromium/issues/detail?id=882743
var isClosing = false
self._closingInterval = setInterval(function () { // No "onclosing" event
if (self._channel && self._channel.readyState === 'closing') {
if (isClosing) self._onChannelClose() // closing timed out: equivalent to onclose firing
isClosing = true
} else {
isClosing = false
}
}, CHANNEL_CLOSING_TIMEOUT)
}
Peer.prototype._read = function () {}
Peer.prototype._write = function (chunk, encoding, cb) {
var self = this
if (self.destroyed) return cb(makeError('cannot write after peer is destroyed', 'ERR_DATA_CHANNEL'))
if (self._connected) {
try {
self.send(chunk)
} catch (err) {
return self.destroy(makeError(err, 'ERR_DATA_CHANNEL'))
}
if (self._channel.bufferedAmount > MAX_BUFFERED_AMOUNT) {
self._debug('start backpressure: bufferedAmount %d', self._channel.bufferedAmount)
self._cb = cb
} else {
cb(null)
}
} else {
self._debug('write before connect')
self._chunk = chunk
self._cb = cb
}
}
// When stream finishes writing, close socket. Half open connections are not
// supported.
Peer.prototype._onFinish = function () {
var self = this
if (self.destroyed) return
if (self._connected) {
destroySoon()
} else {
self.once('connect', destroySoon)
}
// Wait a bit before destroying so the socket flushes.
// TODO: is there a more reliable way to accomplish this?
function destroySoon () {
setTimeout(function () {
self.destroy()
}, 1000)
}
}
Peer.prototype._startIceCompleteTimeout = function () {
var self = this
if (self.destroyed) return
if (self._iceCompleteTimer) return
self._debug('started iceComplete timeout')
self._iceCompleteTimer = setTimeout(function () {
if (!self._iceComplete) {
self._iceComplete = true
self._debug('iceComplete timeout completed')
self.emit('iceTimeout')
self.emit('_iceComplete')
}
}, self.iceCompleteTimeout)
}
Peer.prototype._createOffer = function () {
var self = this
if (self.destroyed) return
self._pc.createOffer(self.offerOptions).then(function (offer) {
if (self.destroyed) return
if (!self.trickle && !self.allowHalfTrickle) offer.sdp = filterTrickle(offer.sdp)
offer.sdp = self.sdpTransform(offer.sdp)
self._pc.setLocalDescription(offer).then(onSuccess).catch(onError)
function onSuccess () {
self._debug('createOffer success')
if (self.destroyed) return
if (self.trickle || self._iceComplete) sendOffer()
else self.once('_iceComplete', sendOffer) // wait for candidates
}
function onError (err) {
self.destroy(makeError(err, 'ERR_SET_LOCAL_DESCRIPTION'))
}
function sendOffer () {
if (self.destroyed) return
var signal = self._pc.localDescription || offer
self._debug('signal')
self.emit('signal', {
type: signal.type,
sdp: signal.sdp
})
}
}).catch(function (err) { self.destroy(makeError(err, 'ERR_CREATE_OFFER')) })
}
Peer.prototype._requestMissingTransceivers = function () {
var self = this
if (self._pc.getTransceivers) {
self._pc.getTransceivers().forEach(transceiver => {
if (!transceiver.mid && transceiver.sender.track && !transceiver.requested) {
transceiver.requested = true // HACK: Safari returns negotiated transceivers with a null mid
self.addTransceiver(transceiver.sender.track.kind)
}
})
}
}
Peer.prototype._createAnswer = function () {
var self = this
if (self.destroyed) return
self._pc.createAnswer(self.answerOptions).then(function (answer) {
if (self.destroyed) return
if (!self.trickle && !self.allowHalfTrickle) answer.sdp = filterTrickle(answer.sdp)
answer.sdp = self.sdpTransform(answer.sdp)
self._pc.setLocalDescription(answer).then(onSuccess).catch(onError)
function onSuccess () {
if (self.destroyed) return
if (self.trickle || self._iceComplete) sendAnswer()
else self.once('_iceComplete', sendAnswer)
}
function onError (err) {
self.destroy(makeError(err, 'ERR_SET_LOCAL_DESCRIPTION'))
}
function sendAnswer () {
if (self.destroyed) return
var signal = self._pc.localDescription || answer
self._debug('signal')
self.emit('signal', {
type: signal.type,
sdp: signal.sdp
})
if (!self.initiator) self._requestMissingTransceivers()
}
}).catch(function (err) { self.destroy(makeError(err, 'ERR_CREATE_ANSWER')) })
}
Peer.prototype._onIceStateChange = function () {
var self = this
if (self.destroyed) return
var iceConnectionState = self._pc.iceConnectionState
var iceGatheringState = self._pc.iceGatheringState
self._debug(
'iceStateChange (connection: %s) (gathering: %s)',
iceConnectionState,
iceGatheringState
)
self.emit('iceStateChange', iceConnectionState, iceGatheringState)
if (iceConnectionState === 'connected' || iceConnectionState === 'completed') {
self._pcReady = true
self._maybeReady()
}
if (iceConnectionState === 'failed') {
self.destroy(makeError('Ice connection failed.', 'ERR_ICE_CONNECTION_FAILURE'))
}
if (iceConnectionState === 'closed') {
self.destroy(makeError('Ice connection closed.', 'ERR_ICE_CONNECTION_CLOSED'))
}
}
Peer.prototype.getStats = function (cb) {
var self = this
// Promise-based getStats() (standard)
if (self._pc.getStats.length === 0) {
self._pc.getStats().then(function (res) {
var reports = []
res.forEach(function (report) {
reports.push(flattenValues(report))
})
cb(null, reports)
}, function (err) { cb(err) })
// Two-parameter callback-based getStats() (deprecated, former standard)
} else if (self._isReactNativeWebrtc) {
self._pc.getStats(null, function (res) {
var reports = []
res.forEach(function (report) {
reports.push(flattenValues(report))
})
cb(null, reports)
}, function (err) { cb(err) })
// Single-parameter callback-based getStats() (non-standard)
} else if (self._pc.getStats.length > 0) {
self._pc.getStats(function (res) {
// If we destroy connection in `connect` callback this code might happen to run when actual connection is already closed
if (self.destroyed) return
var reports = []
res.result().forEach(function (result) {
var report = {}
result.names().forEach(function (name) {
report[name] = result.stat(name)
})
report.id = result.id
report.type = result.type
report.timestamp = result.timestamp
reports.push(flattenValues(report))
})
cb(null, reports)
}, function (err) { cb(err) })
// Unknown browser, skip getStats() since it's anyone's guess which style of
// getStats() they implement.
} else {
cb(null, [])
}
// statreports can come with a value array instead of properties
function flattenValues (report) {
if (Object.prototype.toString.call(report.values) === '[object Array]') {
report.values.forEach(function (value) {
Object.assign(report, value)
})
}
return report
}
}
Peer.prototype._maybeReady = function () {
var self = this
self._debug('maybeReady pc %s channel %s', self._pcReady, self._channelReady)
if (self._connected || self._connecting || !self._pcReady || !self._channelReady) return
self._connecting = true
// HACK: We can't rely on order here, for details see https://github.com/js-platform/node-webrtc/issues/339
function findCandidatePair () {
if (self.destroyed) return
self.getStats(function (err, items) {
if (self.destroyed) return
// Treat getStats error as non-fatal. It's not essential.
if (err) items = []
var remoteCandidates = {}
var localCandidates = {}
var candidatePairs = {}
var foundSelectedCandidatePair = false
items.forEach(function (item) {
// TODO: Once all browsers support the hyphenated stats report types, remove
// the non-hypenated ones
if (item.type === 'remotecandidate' || item.type === 'remote-candidate') {
remoteCandidates[item.id] = item
}
if (item.type === 'localcandidate' || item.type === 'local-candidate') {
localCandidates[item.id] = item
}
if (item.type === 'candidatepair' || item.type === 'candidate-pair') {
candidatePairs[item.id] = item
}
})
items.forEach(function (item) {
// Spec-compliant
if (item.type === 'transport' && item.selectedCandidatePairId) {
setSelectedCandidatePair(candidatePairs[item.selectedCandidatePairId])
}
// Old implementations
if (
(item.type === 'googCandidatePair' && item.googActiveConnection === 'true') ||
((item.type === 'candidatepair' || item.type === 'candidate-pair') && item.selected)
) {
setSelectedCandidatePair(item)
}
})
function setSelectedCandidatePair (selectedCandidatePair) {
foundSelectedCandidatePair = true
var local = localCandidates[selectedCandidatePair.localCandidateId]
if (local && (local.ip || local.address)) {
// Spec
self.localAddress = local.ip || local.address
self.localPort = Number(local.port)
} else if (local && local.ipAddress) {
// Firefox
self.localAddress = local.ipAddress
self.localPort = Number(local.portNumber)
} else if (typeof selectedCandidatePair.googLocalAddress === 'string') {
// TODO: remove this once Chrome 58 is released
local = selectedCandidatePair.googLocalAddress.split(':')
self.localAddress = local[0]
self.localPort = Number(local[1])
}
if (self.localAddress) {
self.localFamily = self.localAddress.includes(':') ? 'IPv6' : 'IPv4'
}
var remote = remoteCandidates[selectedCandidatePair.remoteCandidateId]
if (remote && (remote.ip || remote.address)) {
// Spec
self.remoteAddress = remote.ip || remote.address
self.remotePort = Number(remote.port)
} else if (remote && remote.ipAddress) {
// Firefox
self.remoteAddress = remote.ipAddress
self.remotePort = Number(remote.portNumber)
} else if (typeof selectedCandidatePair.googRemoteAddress === 'string') {
// TODO: remove this once Chrome 58 is released
remote = selectedCandidatePair.googRemoteAddress.split(':')
self.remoteAddress = remote[0]
self.remotePort = Number(remote[1])
}
if (self.remoteAddress) {
self.remoteFamily = self.remoteAddress.includes(':') ? 'IPv6' : 'IPv4'
}
self._debug(
'connect local: %s:%s remote: %s:%s',
self.localAddress, self.localPort, self.remoteAddress, self.remotePort
)
}
// Ignore candidate pair selection in browsers like Safari 11 that do not have any local or remote candidates
// But wait until at least 1 candidate pair is available
if (!foundSelectedCandidatePair && (!Object.keys(candidatePairs).length || Object.keys(localCandidates).length)) {
setTimeout(findCandidatePair, 100)
return
} else {
self._connecting = false
self._connected = true
}
if (self._chunk) {
try {
self.send(self._chunk)
} catch (err) {
return self.destroy(makeError(err, 'ERR_DATA_CHANNEL'))
}
self._chunk = null
self._debug('sent chunk from "write before connect"')
var cb = self._cb
self._cb = null
cb(null)
}
// If `bufferedAmountLowThreshold` and 'onbufferedamountlow' are unsupported,
// fallback to using setInterval to implement backpressure.
if (typeof self._channel.bufferedAmountLowThreshold !== 'number') {
self._interval = setInterval(function () { self._onInterval() }, 150)
if (self._interval.unref) self._interval.unref()
}
self._debug('connect')
self.emit('connect')
})
}
findCandidatePair()
}
Peer.prototype._onInterval = function () {
var self = this
if (!self._cb || !self._channel || self._channel.bufferedAmount > MAX_BUFFERED_AMOUNT) {
return
}
self._onChannelBufferedAmountLow()
}
Peer.prototype._onSignalingStateChange = function () {
var self = this
if (self.destroyed) return
if (self._pc.signalingState === 'stable' && !self._firstStable) {
self._isNegotiating = false
// HACK: Firefox doesn't yet support removing tracks when signalingState !== 'stable'
self._debug('flushing sender queue', self._sendersAwaitingStable)
self._sendersAwaitingStable.forEach(function (sender) {
self._pc.removeTrack(sender)
self._queuedNegotiation = true
})
self._sendersAwaitingStable = []
if (self._queuedNegotiation) {
self._debug('flushing negotiation queue')
self._queuedNegotiation = false
self._needsNegotiation() // negotiate again
}
self._debug('negotiate')
self.emit('negotiate')
}
self._firstStable = false
self._debug('signalingStateChange %s', self._pc.signalingState)
self.emit('signalingStateChange', self._pc.signalingState)
}
Peer.prototype._onIceCandidate = function (event) {
var self = this
if (self.destroyed) return
if (event.candidate && self.trickle) {
self.emit('signal', {
candidate: {
candidate: event.candidate.candidate,
sdpMLineIndex: event.candidate.sdpMLineIndex,
sdpMid: event.candidate.sdpMid
}
})
} else if (!event.candidate && !self._iceComplete) {
self._iceComplete = true
self.emit('_iceComplete')
}
// as soon as we've received one valid candidate start timeout
if (event.candidate) {
self._startIceCompleteTimeout()
}
}
Peer.prototype._onChannelMessage = function (event) {
var self = this
if (self.destroyed) return
var data = event.data
if (data instanceof ArrayBuffer) data = Buffer.from(data)
self.push(data)
}
Peer.prototype._onChannelBufferedAmountLow = function () {
var self = this
if (self.destroyed || !self._cb) return
self._debug('ending backpressure: bufferedAmount %d', self._channel.bufferedAmount)
var cb = self._cb
self._cb = null
cb(null)
}
Peer.prototype._onChannelOpen = function () {
var self = this
if (self._connected || self.destroyed) return
self._debug('on channel open')
self._channelReady = true
self._maybeReady()
}
Peer.prototype._onChannelClose = function () {
var self = this
if (self.destroyed) return
self._debug('on channel close')
self.destroy()
}
Peer.prototype._onTrack = function (event) {
var self = this
if (self.destroyed) return
event.streams.forEach(function (eventStream) {
self._debug('on track')
self.emit('track', event.track, eventStream)
self._remoteTracks.push({
track: event.track,
stream: eventStream
})
if (self._remoteStreams.some(function (remoteStream) {
return remoteStream.id === eventStream.id
})) return // Only fire one 'stream' event, even though there may be multiple tracks per stream
self._remoteStreams.push(eventStream)
setTimeout(function () {
self.emit('stream', eventStream) // ensure all tracks have been added
}, 0)
})
}
Peer.prototype._debug = function () {
var self = this
var args = [].slice.call(arguments)
args[0] = '[' + self._id + '] ' + args[0]
debug.apply(null, args)
}
// HACK: Filter trickle lines when trickle is disabled #354
function filterTrickle (sdp) {
return sdp.replace(/a=ice-options:trickle\s\n/g, '')
}
function makeError (message, code) {
var err = new Error(message)
err.code = code
return err
}
function warn (message) {
console.warn(message)
}
}).call(this,require("buffer").Buffer)
},{"buffer":16,"debug":"debug","get-browser-rtc":18,"inherits":20,"randombytes":24,"readable-stream":39}],45:[function(require,module,exports){
(function (process,Buffer){
/* global WebSocket, DOMException */
const debug = require('debug')('simple-websocket')
const randombytes = require('randombytes')
const stream = require('readable-stream')
const ws = require('ws') // websockets in node - will be empty object in browser
const _WebSocket = typeof ws !== 'function' ? WebSocket : ws
const MAX_BUFFERED_AMOUNT = 64 * 1024
/**
* WebSocket. Same API as node core `net.Socket`. Duplex stream.
* @param {Object} opts
* @param {string=} opts.url websocket server url
* @param {string=} opts.socket raw websocket instance to wrap
*/
class Socket extends stream.Duplex {
constructor (opts = {}) {
// Support simple usage: `new Socket(url)`
if (typeof opts === 'string') {
opts = { url: opts }
}
opts = Object.assign({
allowHalfOpen: false
}, opts)
super(opts)
if (opts.url == null && opts.socket == null) {
throw new Error('Missing required `url` or `socket` option')
}
if (opts.url != null && opts.socket != null) {
throw new Error('Must specify either `url` or `socket` option, not both')
}
this._id = randombytes(4).toString('hex').slice(0, 7)
this._debug('new websocket: %o', opts)
this.connected = false
this.destroyed = false
this._chunk = null
this._cb = null
this._interval = null
if (opts.socket) {
this.url = opts.socket.url
this._ws = opts.socket
this.connected = opts.socket.readyState === _WebSocket.OPEN
} else {
this.url = opts.url
try {
if (typeof ws === 'function') {
// `ws` package accepts options
this._ws = new _WebSocket(opts.url, opts)
} else {
this._ws = new _WebSocket(opts.url)
}
} catch (err) {
process.nextTick(() => this.destroy(err))
return
}
}
this._ws.binaryType = 'arraybuffer'
this._ws.onopen = () => {
this._onOpen()
}
this._ws.onmessage = event => {
this._onMessage(event)
}
this._ws.onclose = () => {
this._onClose()
}
this._ws.onerror = () => {
this.destroy(new Error('connection error to ' + this.url))
}
this._onFinishBound = () => {
this._onFinish()
}
this.once('finish', this._onFinishBound)
}
/**
* Send text/binary data to the WebSocket server.
* @param {TypedArrayView|ArrayBuffer|Buffer|string|Blob|Object} chunk
*/
send (chunk) {
this._ws.send(chunk)
}
// TODO: Delete this method once readable-stream is updated to contain a default
// implementation of destroy() that automatically calls _destroy()
// See: https://github.com/nodejs/readable-stream/issues/283
destroy (err) {
this._destroy(err, () => {})
}
_destroy (err, cb) {
if (this.destroyed) return
this._debug('destroy (error: %s)', err && (err.message || err))
this.readable = this.writable = false
if (!this._readableState.ended) this.push(null)
if (!this._writableState.finished) this.end()
this.connected = false
this.destroyed = true
clearInterval(this._interval)
this._interval = null
this._chunk = null
this._cb = null
if (this._onFinishBound) this.removeListener('finish', this._onFinishBound)
this._onFinishBound = null
if (this._ws) {
const ws = this._ws
const onClose = () => {
ws.onclose = null
}
if (ws.readyState === _WebSocket.CLOSED) {
onClose()
} else {
try {
ws.onclose = onClose
ws.close()
} catch (err) {
onClose()
}
}
ws.onopen = null
ws.onmessage = null
ws.onerror = () => {}
}
this._ws = null
if (err) {
if (typeof DOMException !== 'undefined' && err instanceof DOMException) {
// Convert Edge DOMException object to Error object
const code = err.code
err = new Error(err.message)
err.code = code
}
this.emit('error', err)
}
this.emit('close')
cb()
}
_read () {}
_write (chunk, encoding, cb) {
if (this.destroyed) return cb(new Error('cannot write after socket is destroyed'))
if (this.connected) {
try {
this.send(chunk)
} catch (err) {
return this.destroy(err)
}
if (typeof ws !== 'function' && this._ws.bufferedAmount > MAX_BUFFERED_AMOUNT) {
this._debug('start backpressure: bufferedAmount %d', this._ws.bufferedAmount)
this._cb = cb
} else {
cb(null)
}
} else {
this._debug('write before connect')
this._chunk = chunk
this._cb = cb
}
}
// When stream finishes writing, close socket. Half open connections are not
// supported.
_onFinish () {
if (this.destroyed) return
// Wait a bit before destroying so the socket flushes.
// TODO: is there a more reliable way to accomplish this?
const destroySoon = () => {
setTimeout(() => this.destroy(), 1000)
}
if (this.connected) {
destroySoon()
} else {
this.once('connect', destroySoon)
}
}
_onMessage (event) {
if (this.destroyed) return
let data = event.data
if (data instanceof ArrayBuffer) data = Buffer.from(data)
this.push(data)
}
_onOpen () {
if (this.connected || this.destroyed) return
this.connected = true
if (this._chunk) {
try {
this.send(this._chunk)
} catch (err) {
return this.destroy(err)
}
this._chunk = null
this._debug('sent chunk from "write before connect"')
const cb = this._cb
this._cb = null
cb(null)
}
// Backpressure is not implemented in Node.js. The `ws` module has a buggy
// `bufferedAmount` property. See: https://github.com/websockets/ws/issues/492
if (typeof ws !== 'function') {
this._interval = setInterval(() => this._onInterval(), 150)
if (this._interval.unref) this._interval.unref()
}
this._debug('connect')
this.emit('connect')
}
_onInterval () {
if (!this._cb || !this._ws || this._ws.bufferedAmount > MAX_BUFFERED_AMOUNT) {
return
}
this._debug('ending backpressure: bufferedAmount %d', this._ws.bufferedAmount)
const cb = this._cb
this._cb = null
cb(null)
}
_onClose () {
if (this.destroyed) return
this._debug('on close')
this.destroy()
}
_debug () {
const args = [].slice.call(arguments)
args[0] = '[' + this._id + '] ' + args[0]
debug.apply(null, args)
}
}
Socket.WEBSOCKET_SUPPORT = !!_WebSocket
module.exports = Socket
}).call(this,require('_process'),require("buffer").Buffer)
},{"_process":23,"buffer":16,"debug":"debug","randombytes":24,"readable-stream":39,"ws":15}],46:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
/*<replacement>*/
var Buffer = require('safe-buffer').Buffer;
/*</replacement>*/
var isEncoding = Buffer.isEncoding || function (encoding) {
encoding = '' + encoding;
switch (encoding && encoding.toLowerCase()) {
case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw':
return true;
default:
return false;
}
};
function _normalizeEncoding(enc) {
if (!enc) return 'utf8';
var retried;
while (true) {
switch (enc) {
case 'utf8':
case 'utf-8':
return 'utf8';
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return 'utf16le';
case 'latin1':
case 'binary':
return 'latin1';
case 'base64':
case 'ascii':
case 'hex':
return enc;
default:
if (retried) return; // undefined
enc = ('' + enc).toLowerCase();
retried = true;
}
}
};
// Do not cache `Buffer.isEncoding` when checking encoding names as some
// modules monkey-patch it to support additional encodings
function normalizeEncoding(enc) {
var nenc = _normalizeEncoding(enc);
if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc);
return nenc || enc;
}
// StringDecoder provides an interface for efficiently splitting a series of
// buffers into a series of JS strings without breaking apart multi-byte
// characters.
exports.StringDecoder = StringDecoder;
function StringDecoder(encoding) {
this.encoding = normalizeEncoding(encoding);
var nb;
switch (this.encoding) {
case 'utf16le':
this.text = utf16Text;
this.end = utf16End;
nb = 4;
break;
case 'utf8':
this.fillLast = utf8FillLast;
nb = 4;
break;
case 'base64':
this.text = base64Text;
this.end = base64End;
nb = 3;
break;
default:
this.write = simpleWrite;
this.end = simpleEnd;
return;
}
this.lastNeed = 0;
this.lastTotal = 0;
this.lastChar = Buffer.allocUnsafe(nb);
}
StringDecoder.prototype.write = function (buf) {
if (buf.length === 0) return '';
var r;
var i;
if (this.lastNeed) {
r = this.fillLast(buf);
if (r === undefined) return '';
i = this.lastNeed;
this.lastNeed = 0;
} else {
i = 0;
}
if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);
return r || '';
};
StringDecoder.prototype.end = utf8End;
// Returns only complete characters in a Buffer
StringDecoder.prototype.text = utf8Text;
// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer
StringDecoder.prototype.fillLast = function (buf) {
if (this.lastNeed <= buf.length) {
buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);
return this.lastChar.toString(this.encoding, 0, this.lastTotal);
}
buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);
this.lastNeed -= buf.length;
};
// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a
// continuation byte. If an invalid byte is detected, -2 is returned.
function utf8CheckByte(byte) {
if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4;
return byte >> 6 === 0x02 ? -1 : -2;
}
// Checks at most 3 bytes at the end of a Buffer in order to detect an
// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)
// needed to complete the UTF-8 character (if applicable) are returned.
function utf8CheckIncomplete(self, buf, i) {
var j = buf.length - 1;
if (j < i) return 0;
var nb = utf8CheckByte(buf[j]);
if (nb >= 0) {
if (nb > 0) self.lastNeed = nb - 1;
return nb;
}
if (--j < i || nb === -2) return 0;
nb = utf8CheckByte(buf[j]);
if (nb >= 0) {
if (nb > 0) self.lastNeed = nb - 2;
return nb;
}
if (--j < i || nb === -2) return 0;
nb = utf8CheckByte(buf[j]);
if (nb >= 0) {
if (nb > 0) {
if (nb === 2) nb = 0;else self.lastNeed = nb - 3;
}
return nb;
}
return 0;
}
// Validates as many continuation bytes for a multi-byte UTF-8 character as
// needed or are available. If we see a non-continuation byte where we expect
// one, we "replace" the validated continuation bytes we've seen so far with
// a single UTF-8 replacement character ('\ufffd'), to match v8's UTF-8 decoding
// behavior. The continuation byte check is included three times in the case
// where all of the continuation bytes for a character exist in the same buffer.
// It is also done this way as a slight performance increase instead of using a
// loop.
function utf8CheckExtraBytes(self, buf, p) {
if ((buf[0] & 0xC0) !== 0x80) {
self.lastNeed = 0;
return '\ufffd';
}
if (self.lastNeed > 1 && buf.length > 1) {
if ((buf[1] & 0xC0) !== 0x80) {
self.lastNeed = 1;
return '\ufffd';
}
if (self.lastNeed > 2 && buf.length > 2) {
if ((buf[2] & 0xC0) !== 0x80) {
self.lastNeed = 2;
return '\ufffd';
}
}
}
}
// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.
function utf8FillLast(buf) {
var p = this.lastTotal - this.lastNeed;
var r = utf8CheckExtraBytes(this, buf, p);
if (r !== undefined) return r;
if (this.lastNeed <= buf.length) {
buf.copy(this.lastChar, p, 0, this.lastNeed);
return this.lastChar.toString(this.encoding, 0, this.lastTotal);
}
buf.copy(this.lastChar, p, 0, buf.length);
this.lastNeed -= buf.length;
}
// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a
// partial character, the character's bytes are buffered until the required
// number of bytes are available.
function utf8Text(buf, i) {
var total = utf8CheckIncomplete(this, buf, i);
if (!this.lastNeed) return buf.toString('utf8', i);
this.lastTotal = total;
var end = buf.length - (total - this.lastNeed);
buf.copy(this.lastChar, 0, end);
return buf.toString('utf8', i, end);
}
// For UTF-8, a replacement character is added when ending on a partial
// character.
function utf8End(buf) {
var r = buf && buf.length ? this.write(buf) : '';
if (this.lastNeed) return r + '\ufffd';
return r;
}
// UTF-16LE typically needs two bytes per character, but even if we have an even
// number of bytes available, we need to check if we end on a leading/high
// surrogate. In that case, we need to wait for the next two bytes in order to
// decode the last character properly.
function utf16Text(buf, i) {
if ((buf.length - i) % 2 === 0) {
var r = buf.toString('utf16le', i);
if (r) {
var c = r.charCodeAt(r.length - 1);
if (c >= 0xD800 && c <= 0xDBFF) {
this.lastNeed = 2;
this.lastTotal = 4;
this.lastChar[0] = buf[buf.length - 2];
this.lastChar[1] = buf[buf.length - 1];
return r.slice(0, -1);
}
}
return r;
}
this.lastNeed = 1;
this.lastTotal = 2;
this.lastChar[0] = buf[buf.length - 1];
return buf.toString('utf16le', i, buf.length - 1);
}
// For UTF-16LE we do not explicitly append special replacement characters if we
// end on a partial character, we simply let v8 handle that.
function utf16End(buf) {
var r = buf && buf.length ? this.write(buf) : '';
if (this.lastNeed) {
var end = this.lastTotal - this.lastNeed;
return r + this.lastChar.toString('utf16le', 0, end);
}
return r;
}
function base64Text(buf, i) {
var n = (buf.length - i) % 3;
if (n === 0) return buf.toString('base64', i);
this.lastNeed = 3 - n;
this.lastTotal = 3;
if (n === 1) {
this.lastChar[0] = buf[buf.length - 1];
} else {
this.lastChar[0] = buf[buf.length - 2];
this.lastChar[1] = buf[buf.length - 1];
}
return buf.toString('base64', i, buf.length - n);
}
function base64End(buf) {
var r = buf && buf.length ? this.write(buf) : '';
if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed);
return r;
}
// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)
function simpleWrite(buf) {
return buf.toString(this.encoding);
}
function simpleEnd(buf) {
return buf && buf.length ? this.write(buf) : '';
}
},{"safe-buffer":41}],47:[function(require,module,exports){
"use strict"
function unique_pred(list, compare) {
var ptr = 1
, len = list.length
, a=list[0], b=list[0]
for(var i=1; i<len; ++i) {
b = a
a = list[i]
if(compare(a, b)) {
if(i === ptr) {
ptr++
continue
}
list[ptr++] = a
}
}
list.length = ptr
return list
}
function unique_eq(list) {
var ptr = 1
, len = list.length
, a=list[0], b = list[0]
for(var i=1; i<len; ++i, b=a) {
b = a
a = list[i]
if(a !== b) {
if(i === ptr) {
ptr++
continue
}
list[ptr++] = a
}
}
list.length = ptr
return list
}
function unique(list, compare, sorted) {
if(list.length === 0) {
return list
}
if(compare) {
if(!sorted) {
list.sort(compare)
}
return unique_pred(list, compare)
}
if(!sorted) {
list.sort()
}
return unique_eq(list)
}
module.exports = unique
},{}],48:[function(require,module,exports){
(function (global){
/**
* Module exports.
*/
module.exports = deprecate;
/**
* Mark that a method should not be used.
* Returns a modified function which warns once by default.
*
* If `localStorage.noDeprecation = true` is set, then it is a no-op.
*
* If `localStorage.throwDeprecation = true` is set, then deprecated functions
* will throw an Error when invoked.
*
* If `localStorage.traceDeprecation = true` is set, then deprecated functions
* will invoke `console.trace()` instead of `console.error()`.
*
* @param {Function} fn - the function to deprecate
* @param {String} msg - the string to print to the console when `fn` is invoked
* @returns {Function} a new "deprecated" version of `fn`
* @api public
*/
function deprecate (fn, msg) {
if (config('noDeprecation')) {
return fn;
}
var warned = false;
function deprecated() {
if (!warned) {
if (config('throwDeprecation')) {
throw new Error(msg);
} else if (config('traceDeprecation')) {
console.trace(msg);
} else {
console.warn(msg);
}
warned = true;
}
return fn.apply(this, arguments);
}
return deprecated;
}
/**
* Checks `localStorage` for boolean values for the given `name`.
*
* @param {String} name
* @returns {Boolean}
* @api private
*/
function config (name) {
// accessing global.localStorage can trigger a DOMException in sandboxed iframes
try {
if (!global.localStorage) return false;
} catch (_) {
return false;
}
var val = global.localStorage[name];
if (null == val) return false;
return String(val).toLowerCase() === 'true';
}
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],49:[function(require,module,exports){
// Returns a wrapper function that returns a wrapped callback
// The wrapper function should do some stuff, and return a
// presumably different callback function.
// This makes sure that own properties are retained, so that
// decorations and such are not lost along the way.
module.exports = wrappy
function wrappy (fn, cb) {
if (fn && cb) return wrappy(fn)(cb)
if (typeof fn !== 'function')
throw new TypeError('need wrapper function')
Object.keys(fn).forEach(function (k) {
wrapper[k] = fn[k]
})
return wrapper
function wrapper() {
var args = new Array(arguments.length)
for (var i = 0; i < args.length; i++) {
args[i] = arguments[i]
}
var ret = fn.apply(this, args)
var cb = args[args.length-1]
if (typeof ret === 'function' && ret !== cb) {
Object.keys(cb).forEach(function (k) {
ret[k] = cb[k]
})
}
return ret
}
}
},{}],"debug":[function(require,module,exports){
(function (process){
/* eslint-env browser */
/**
* This is the web browser implementation of `debug()`.
*/
exports.log = log;
exports.formatArgs = formatArgs;
exports.save = save;
exports.load = load;
exports.useColors = useColors;
exports.storage = localstorage();
/**
* Colors.
*/
exports.colors = [
'#0000CC',
'#0000FF',
'#0033CC',
'#0033FF',
'#0066CC',
'#0066FF',
'#0099CC',
'#0099FF',
'#00CC00',
'#00CC33',
'#00CC66',
'#00CC99',
'#00CCCC',
'#00CCFF',
'#3300CC',
'#3300FF',
'#3333CC',
'#3333FF',
'#3366CC',
'#3366FF',
'#3399CC',
'#3399FF',
'#33CC00',
'#33CC33',
'#33CC66',
'#33CC99',
'#33CCCC',
'#33CCFF',
'#6600CC',
'#6600FF',
'#6633CC',
'#6633FF',
'#66CC00',
'#66CC33',
'#9900CC',
'#9900FF',
'#9933CC',
'#9933FF',
'#99CC00',
'#99CC33',
'#CC0000',
'#CC0033',
'#CC0066',
'#CC0099',
'#CC00CC',
'#CC00FF',
'#CC3300',
'#CC3333',
'#CC3366',
'#CC3399',
'#CC33CC',
'#CC33FF',
'#CC6600',
'#CC6633',
'#CC9900',
'#CC9933',
'#CCCC00',
'#CCCC33',
'#FF0000',
'#FF0033',
'#FF0066',
'#FF0099',
'#FF00CC',
'#FF00FF',
'#FF3300',
'#FF3333',
'#FF3366',
'#FF3399',
'#FF33CC',
'#FF33FF',
'#FF6600',
'#FF6633',
'#FF9900',
'#FF9933',
'#FFCC00',
'#FFCC33'
];
/**
* Currently only WebKit-based Web Inspectors, Firefox >= v31,
* and the Firebug extension (any Firefox version) are known
* to support "%c" CSS customizations.
*
* TODO: add a `localStorage` variable to explicitly enable/disable colors
*/
// eslint-disable-next-line complexity
function useColors() {
// NB: In an Electron preload script, document will be defined but not fully
// initialized. Since we know we're in Chrome, we'll just detect this case
// explicitly
if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {
return true;
}
// Internet Explorer and Edge do not support colors.
if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
return false;
}
// Is webkit? http://stackoverflow.com/a/16459606/376773
// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
// Is firebug? http://stackoverflow.com/a/398120/376773
(typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
// Is firefox >= v31?
// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
// Double check webkit in userAgent just in case we are in a worker
(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
}
/**
* Colorize log arguments if enabled.
*
* @api public
*/
function formatArgs(args) {
args[0] = (this.useColors ? '%c' : '') +
this.namespace +
(this.useColors ? ' %c' : ' ') +
args[0] +
(this.useColors ? '%c ' : ' ') +
'+' + module.exports.humanize(this.diff);
if (!this.useColors) {
return;
}
const c = 'color: ' + this.color;
args.splice(1, 0, c, 'color: inherit');
// The final "%c" is somewhat tricky, because there could be other
// arguments passed either before or after the %c, so we need to
// figure out the correct index to insert the CSS into
let index = 0;
let lastC = 0;
args[0].replace(/%[a-zA-Z%]/g, match => {
if (match === '%%') {
return;
}
index++;
if (match === '%c') {
// We only are interested in the *last* %c
// (the user may have provided their own)
lastC = index;
}
});
args.splice(lastC, 0, c);
}
/**
* Invokes `console.log()` when available.
* No-op when `console.log` is not a "function".
*
* @api public
*/
function log(...args) {
// This hackery is required for IE8/9, where
// the `console.log` function doesn't have 'apply'
return typeof console === 'object' &&
console.log &&
console.log(...args);
}
/**
* Save `namespaces`.
*
* @param {String} namespaces
* @api private
*/
function save(namespaces) {
try {
if (namespaces) {
exports.storage.setItem('debug', namespaces);
} else {
exports.storage.removeItem('debug');
}
} catch (error) {
// Swallow
// XXX (@Qix-) should we be logging these?
}
}
/**
* Load `namespaces`.
*
* @return {String} returns the previously persisted debug modes
* @api private
*/
function load() {
let r;
try {
r = exports.storage.getItem('debug');
} catch (error) {
// Swallow
// XXX (@Qix-) should we be logging these?
}
// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
if (!r && typeof process !== 'undefined' && 'env' in process) {
r = process.env.DEBUG;
}
return r;
}
/**
* Localstorage attempts to return the localstorage.
*
* This is necessary because safari throws
* when a user disables cookies/localstorage
* and you attempt to access it.
*
* @return {LocalStorage}
* @api private
*/
function localstorage() {
try {
// TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context
// The Browser also has localStorage in the global context.
return localStorage;
} catch (error) {
// Swallow
// XXX (@Qix-) should we be logging these?
}
}
module.exports = require('./common')(exports);
const {formatters} = module.exports;
/**
* Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
*/
formatters.j = function (v) {
try {
return JSON.stringify(v);
} catch (error) {
return '[UnexpectedJSONParseError]: ' + error.message;
}
};
}).call(this,require('_process'))
},{"./common":17,"_process":23}],"events":[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var objectCreate = Object.create || objectCreatePolyfill
var objectKeys = Object.keys || objectKeysPolyfill
var bind = Function.prototype.bind || functionBindPolyfill
function EventEmitter() {
if (!this._events || !Object.prototype.hasOwnProperty.call(this, '_events')) {
this._events = objectCreate(null);
this._eventsCount = 0;
}
this._maxListeners = this._maxListeners || undefined;
}
module.exports = EventEmitter;
// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;
EventEmitter.prototype._events = undefined;
EventEmitter.prototype._maxListeners = undefined;
// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
var defaultMaxListeners = 10;
var hasDefineProperty;
try {
var o = {};
if (Object.defineProperty) Object.defineProperty(o, 'x', { value: 0 });
hasDefineProperty = o.x === 0;
} catch (err) { hasDefineProperty = false }
if (hasDefineProperty) {
Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
enumerable: true,
get: function() {
return defaultMaxListeners;
},
set: function(arg) {
// check whether the input is a positive number (whose value is zero or
// greater and not a NaN).
if (typeof arg !== 'number' || arg < 0 || arg !== arg)
throw new TypeError('"defaultMaxListeners" must be a positive number');
defaultMaxListeners = arg;
}
});
} else {
EventEmitter.defaultMaxListeners = defaultMaxListeners;
}
// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
if (typeof n !== 'number' || n < 0 || isNaN(n))
throw new TypeError('"n" argument must be a positive number');
this._maxListeners = n;
return this;
};
function $getMaxListeners(that) {
if (that._maxListeners === undefined)
return EventEmitter.defaultMaxListeners;
return that._maxListeners;
}
EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
return $getMaxListeners(this);
};
// These standalone emit* functions are used to optimize calling of event
// handlers for fast cases because emit() itself often has a variable number of
// arguments and can be deoptimized because of that. These functions always have
// the same number of arguments and thus do not get deoptimized, so the code
// inside them can execute faster.
function emitNone(handler, isFn, self) {
if (isFn)
handler.call(self);
else {
var len = handler.length;
var listeners = arrayClone(handler, len);
for (var i = 0; i < len; ++i)
listeners[i].call(self);
}
}
function emitOne(handler, isFn, self, arg1) {
if (isFn)
handler.call(self, arg1);
else {
var len = handler.length;
var listeners = arrayClone(handler, len);
for (var i = 0; i < len; ++i)
listeners[i].call(self, arg1);
}
}
function emitTwo(handler, isFn, self, arg1, arg2) {
if (isFn)
handler.call(self, arg1, arg2);
else {
var len = handler.length;
var listeners = arrayClone(handler, len);
for (var i = 0; i < len; ++i)
listeners[i].call(self, arg1, arg2);
}
}
function emitThree(handler, isFn, self, arg1, arg2, arg3) {
if (isFn)
handler.call(self, arg1, arg2, arg3);
else {
var len = handler.length;
var listeners = arrayClone(handler, len);
for (var i = 0; i < len; ++i)
listeners[i].call(self, arg1, arg2, arg3);
}
}
function emitMany(handler, isFn, self, args) {
if (isFn)
handler.apply(self, args);
else {
var len = handler.length;
var listeners = arrayClone(handler, len);
for (var i = 0; i < len; ++i)
listeners[i].apply(self, args);
}
}
EventEmitter.prototype.emit = function emit(type) {
var er, handler, len, args, i, events;
var doError = (type === 'error');
events = this._events;
if (events)
doError = (doError && events.error == null);
else if (!doError)
return false;
// If there is no 'error' event listener then throw.
if (doError) {
if (arguments.length > 1)
er = arguments[1];
if (er instanceof Error) {
throw er; // Unhandled 'error' event
} else {
// At least give some kind of context to the user
var err = new Error('Unhandled "error" event. (' + er + ')');
err.context = er;
throw err;
}
return false;
}
handler = events[type];
if (!handler)
return false;
var isFn = typeof handler === 'function';
len = arguments.length;
switch (len) {
// fast cases
case 1:
emitNone(handler, isFn, this);
break;
case 2:
emitOne(handler, isFn, this, arguments[1]);
break;
case 3:
emitTwo(handler, isFn, this, arguments[1], arguments[2]);
break;
case 4:
emitThree(handler, isFn, this, arguments[1], arguments[2], arguments[3]);
break;
// slower
default:
args = new Array(len - 1);
for (i = 1; i < len; i++)
args[i - 1] = arguments[i];
emitMany(handler, isFn, this, args);
}
return true;
};
function _addListener(target, type, listener, prepend) {
var m;
var events;
var existing;
if (typeof listener !== 'function')
throw new TypeError('"listener" argument must be a function');
events = target._events;
if (!events) {
events = target._events = objectCreate(null);
target._eventsCount = 0;
} else {
// To avoid recursion in the case that type === "newListener"! Before
// adding it to the listeners, first emit "newListener".
if (events.newListener) {
target.emit('newListener', type,
listener.listener ? listener.listener : listener);
// Re-assign `events` because a newListener handler could have caused the
// this._events to be assigned to a new object
events = target._events;
}
existing = events[type];
}
if (!existing) {
// Optimize the case of one listener. Don't need the extra array object.
existing = events[type] = listener;
++target._eventsCount;
} else {
if (typeof existing === 'function') {
// Adding the second element, need to change to array.
existing = events[type] =
prepend ? [listener, existing] : [existing, listener];
} else {
// If we've already got an array, just append.
if (prepend) {
existing.unshift(listener);
} else {
existing.push(listener);
}
}
// Check for listener leak
if (!existing.warned) {
m = $getMaxListeners(target);
if (m && m > 0 && existing.length > m) {
existing.warned = true;
var w = new Error('Possible EventEmitter memory leak detected. ' +
existing.length + ' "' + String(type) + '" listeners ' +
'added. Use emitter.setMaxListeners() to ' +
'increase limit.');
w.name = 'MaxListenersExceededWarning';
w.emitter = target;
w.type = type;
w.count = existing.length;
if (typeof console === 'object' && console.warn) {
console.warn('%s: %s', w.name, w.message);
}
}
}
}
return target;
}
EventEmitter.prototype.addListener = function addListener(type, listener) {
return _addListener(this, type, listener, false);
};
EventEmitter.prototype.on = EventEmitter.prototype.addListener;
EventEmitter.prototype.prependListener =
function prependListener(type, listener) {
return _addListener(this, type, listener, true);
};
function onceWrapper() {
if (!this.fired) {
this.target.removeListener(this.type, this.wrapFn);
this.fired = true;
switch (arguments.length) {
case 0:
return this.listener.call(this.target);
case 1:
return this.listener.call(this.target, arguments[0]);
case 2:
return this.listener.call(this.target, arguments[0], arguments[1]);
case 3:
return this.listener.call(this.target, arguments[0], arguments[1],
arguments[2]);
default:
var args = new Array(arguments.length);
for (var i = 0; i < args.length; ++i)
args[i] = arguments[i];
this.listener.apply(this.target, args);
}
}
}
function _onceWrap(target, type, listener) {
var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
var wrapped = bind.call(onceWrapper, state);
wrapped.listener = listener;
state.wrapFn = wrapped;
return wrapped;
}
EventEmitter.prototype.once = function once(type, listener) {
if (typeof listener !== 'function')
throw new TypeError('"listener" argument must be a function');
this.on(type, _onceWrap(this, type, listener));
return this;
};
EventEmitter.prototype.prependOnceListener =
function prependOnceListener(type, listener) {
if (typeof listener !== 'function')
throw new TypeError('"listener" argument must be a function');
this.prependListener(type, _onceWrap(this, type, listener));
return this;
};
// Emits a 'removeListener' event if and only if the listener was removed.
EventEmitter.prototype.removeListener =
function removeListener(type, listener) {
var list, events, position, i, originalListener;
if (typeof listener !== 'function')
throw new TypeError('"listener" argument must be a function');
events = this._events;
if (!events)
return this;
list = events[type];
if (!list)
return this;
if (list === listener || list.listener === listener) {
if (--this._eventsCount === 0)
this._events = objectCreate(null);
else {
delete events[type];
if (events.removeListener)
this.emit('removeListener', type, list.listener || listener);
}
} else if (typeof list !== 'function') {
position = -1;
for (i = list.length - 1; i >= 0; i--) {
if (list[i] === listener || list[i].listener === listener) {
originalListener = list[i].listener;
position = i;
break;
}
}
if (position < 0)
return this;
if (position === 0)
list.shift();
else
spliceOne(list, position);
if (list.length === 1)
events[type] = list[0];
if (events.removeListener)
this.emit('removeListener', type, originalListener || listener);
}
return this;
};
EventEmitter.prototype.removeAllListeners =
function removeAllListeners(type) {
var listeners, events, i;
events = this._events;
if (!events)
return this;
// not listening for removeListener, no need to emit
if (!events.removeListener) {
if (arguments.length === 0) {
this._events = objectCreate(null);
this._eventsCount = 0;
} else if (events[type]) {
if (--this._eventsCount === 0)
this._events = objectCreate(null);
else
delete events[type];
}
return this;
}
// emit removeListener for all listeners on all events
if (arguments.length === 0) {
var keys = objectKeys(events);
var key;
for (i = 0; i < keys.length; ++i) {
key = keys[i];
if (key === 'removeListener') continue;
this.removeAllListeners(key);
}
this.removeAllListeners('removeListener');
this._events = objectCreate(null);
this._eventsCount = 0;
return this;
}
listeners = events[type];
if (typeof listeners === 'function') {
this.removeListener(type, listeners);
} else if (listeners) {
// LIFO order
for (i = listeners.length - 1; i >= 0; i--) {
this.removeListener(type, listeners[i]);
}
}
return this;
};
function _listeners(target, type, unwrap) {
var events = target._events;
if (!events)
return [];
var evlistener = events[type];
if (!evlistener)
return [];
if (typeof evlistener === 'function')
return unwrap ? [evlistener.listener || evlistener] : [evlistener];
return unwrap ? unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
}
EventEmitter.prototype.listeners = function listeners(type) {
return _listeners(this, type, true);
};
EventEmitter.prototype.rawListeners = function rawListeners(type) {
return _listeners(this, type, false);
};
EventEmitter.listenerCount = function(emitter, type) {
if (typeof emitter.listenerCount === 'function') {
return emitter.listenerCount(type);
} else {
return listenerCount.call(emitter, type);
}
};
EventEmitter.prototype.listenerCount = listenerCount;
function listenerCount(type) {
var events = this._events;
if (events) {
var evlistener = events[type];
if (typeof evlistener === 'function') {
return 1;
} else if (evlistener) {
return evlistener.length;
}
}
return 0;
}
EventEmitter.prototype.eventNames = function eventNames() {
return this._eventsCount > 0 ? Reflect.ownKeys(this._events) : [];
};
// About 1.5x faster than the two-arg version of Array#splice().
function spliceOne(list, index) {
for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1)
list[i] = list[k];
list.pop();
}
function arrayClone(arr, n) {
var copy = new Array(n);
for (var i = 0; i < n; ++i)
copy[i] = arr[i];
return copy;
}
function unwrapListeners(arr) {
var ret = new Array(arr.length);
for (var i = 0; i < ret.length; ++i) {
ret[i] = arr[i].listener || arr[i];
}
return ret;
}
function objectCreatePolyfill(proto) {
var F = function() {};
F.prototype = proto;
return new F;
}
function objectKeysPolyfill(obj) {
var keys = [];
for (var k in obj) if (Object.prototype.hasOwnProperty.call(obj, k)) {
keys.push(k);
}
return k;
}
function functionBindPolyfill(context) {
var fn = this;
return function () {
return fn.apply(context, arguments);
};
}
},{}],"p2p-media-loader-core":[function(require,module,exports){
"use strict";
/**
* @license Apache-2.0
* Copyright 2018 Novage LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function __export(m) {
for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
}
Object.defineProperty(exports, "__esModule", { value: true });
exports.version = "0.6.2";
__export(require("./loader-interface"));
__export(require("./hybrid-loader"));
},{"./hybrid-loader":4,"./loader-interface":5}]},{},[2]);
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