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Code Issues Releases Wiki Activity

Move over to posting UnarchiveInfoEvents. Post UnarchiveStartEvent

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codedread 2011-09-16 15:52:36 -04:00
parent 386a068447
commit ad9b98dd61
5 changed files with 126 additions and 66 deletions
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48
unzip.js
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@ -12,7 +12,13 @@
// This file expects to be invoked as a Worker (see onmessage below).
importScripts('binary.js');
importScripts('archive.js');
// Helper function.
var info = function(str) {
postMessage(new bitjs.archive.UnarchiveInfoEvent(str));
};
var zLocalFileHeaderSignature = 0x04034b50;
var zArchiveExtraDataSignature = 0x08064b50;
var zCentralFileHeaderSignature = 0x02014b50;
@ -46,25 +52,25 @@ var ZipLocalFile = function(bstream, bDebug) {
}
if (this.debug) {
postMessage("Zip Local File Header:");
postMessage(" version=" + this.version);
postMessage(" general purpose=" + this.generalPurpose);
postMessage(" compression method=" + this.compressionMethod);
postMessage(" last mod file time=" + this.lastModFileTime);
postMessage(" last mod file date=" + this.lastModFileDate);
postMessage(" crc32=" + this.crc32);
postMessage(" compressed size=" + this.compressedSize);
postMessage(" uncompressed size=" + this.uncompressedSize);
postMessage(" file name length=" + this.fileNameLength);
postMessage(" extra field length=" + this.extraFieldLength);
postMessage(" filename = '" + this.filename + "'");
info(new bitjs.archive.UnarchiveInfoEvent("Zip Local File Header:"));
info(" version=" + this.version);
info(" general purpose=" + this.generalPurpose);
info(" compression method=" + this.compressionMethod);
info(" last mod file time=" + this.lastModFileTime);
info(" last mod file date=" + this.lastModFileDate);
info(" crc32=" + this.crc32);
info(" compressed size=" + this.compressedSize);
info(" uncompressed size=" + this.uncompressedSize);
info(" file name length=" + this.fileNameLength);
info(" extra field length=" + this.extraFieldLength);
info(" filename = '" + this.filename + "'");
}
this.extraField = null;
if (this.extraFieldLength > 0) {
this.extraField = bstream.readString(this.extraFieldLength);
if (this.debug) {
postMessage(" extra field=" + this.extraField);
info(" extra field=" + this.extraField);
}
}
@ -93,7 +99,7 @@ ZipLocalFile.prototype.unzip = function() {
// Zip Version 1.0, no compression (store only)
if (this.compressionMethod == 0 ) {
if (this.debug)
postMessage("ZIP v"+this.version+", store only: " + this.filename + " (" + this.compressedSize + " bytes)");
info("ZIP v"+this.version+", store only: " + this.filename + " (" + this.compressedSize + " bytes)");
progress.currentFileBytesUnzipped = this.compressedSize;
progress.totalBytesUnzipped += this.compressedSize;
this.isValid = true;
@ -101,12 +107,12 @@ ZipLocalFile.prototype.unzip = function() {
// version == 20, compression method == 8 (DEFLATE)
else if (this.compressionMethod == 8) {
if (this.debug)
postMessage("ZIP v2.0, DEFLATE: " + this.filename + " (" + this.compressedSize + " bytes)");
info("ZIP v2.0, DEFLATE: " + this.filename + " (" + this.compressedSize + " bytes)");
this.fileData = inflate(this.fileData, this.uncompressedSize);
this.isValid = true;
}
else {
postMessage("UNSUPPORTED VERSION/FORMAT: ZIP v" + this.version + ", compression method=" + this.compressionMethod + ": " + this.filename + " (" + this.compressedSize + " bytes)");
info("UNSUPPORTED VERSION/FORMAT: ZIP v" + this.version + ", compression method=" + this.compressionMethod + ": " + this.filename + " (" + this.compressedSize + " bytes)");
this.isValid = false;
this.fileData = null;
}
@ -122,6 +128,8 @@ ZipLocalFile.prototype.unzip = function() {
// returns null on error
// returns an array of DecompressedFile objects on success
var unzip = function(arrayBuffer, bDebug) {
postMessage(new bitjs.archive.UnarchiveStartEvent());
var bstream = new bitjs.io.ByteStream(arrayBuffer);
// detect local file header signature or return null
if (bstream.peekNumber(4) == zLocalFileHeaderSignature) {
@ -162,7 +170,7 @@ var unzip = function(arrayBuffer, bDebug) {
// archive extra data record
if (bstream.peekNumber(4) == zArchiveExtraDataSignature) {
if (gDebug) {
postMessage(" Found an Archive Extra Data Signature");
info(" Found an Archive Extra Data Signature");
}
// skipping this record for now
bstream.readNumber(4);
@ -174,7 +182,7 @@ var unzip = function(arrayBuffer, bDebug) {
// TODO: handle the rest of the structures (Zip64 stuff)
if (bstream.peekNumber(4) == zCentralFileHeaderSignature) {
if (gDebug) {
postMessage(" Found a Central File Header");
info(" Found a Central File Header");
}
// read all file headers
while (bstream.peekNumber(4) == zCentralFileHeaderSignature) {
@ -205,7 +213,7 @@ var unzip = function(arrayBuffer, bDebug) {
// digital signature
if (bstream.peekNumber(4) == zDigitalSignatureSignature) {
if (gDebug) {
postMessage(" Found a Digital Signature");
info(" Found a Digital Signature");
}
bstream.readNumber(4);
var sizeOfSignature = bstream.readNumber(2);