emit more specific status codes on video upload (#3423)

- reduce http status codes list to potentially useful codes
- convert more codes to typed ones
- factorize html generator for error responses

server/helpers/custom-validators/misc.ts

@@ -86,6 +86,50 @@ function toIntArray (value: any) {
   return value.map(v => validator.toInt(v))
 }
 
+function isFileFieldValid (
+  files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[],
+  field: string,
+  optional = false
+) {
+  // Should have files
+  if (!files) return optional
+  if (isArray(files)) return optional
+
+  // Should have a file
+  const fileArray = files[field]
+  if (!fileArray || fileArray.length === 0) {
+    return optional
+  }
+
+  // The file should exist
+  const file = fileArray[0]
+  if (!file || !file.originalname) return false
+  return file
+}
+
+function isFileMimeTypeValid (
+  files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[],
+  mimeTypeRegex: string,
+  field: string,
+  optional = false
+) {
+  // Should have files
+  if (!files) return optional
+  if (isArray(files)) return optional
+
+  // Should have a file
+  const fileArray = files[field]
+  if (!fileArray || fileArray.length === 0) {
+    return optional
+  }
+
+  // The file should exist
+  const file = fileArray[0]
+  if (!file || !file.originalname) return false
+
+  return new RegExp(`^${mimeTypeRegex}$`, 'i').test(file.mimetype)
+}
+
 function isFileValid (
   files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[],
   mimeTypeRegex: string,
@@ -132,5 +176,7 @@ export {
   toIntOrNull,
   toArray,
   toIntArray,
+  isFileFieldValid,
+  isFileMimeTypeValid,
   isFileValid
 }

server/helpers/custom-validators/videos.ts

@@ -11,7 +11,7 @@ import {
   VIDEO_STATES,
   VIDEO_LIVE
 } from '../../initializers/constants'
-import { exists, isArray, isDateValid, isFileValid } from './misc'
+import { exists, isArray, isDateValid, isFileMimeTypeValid, isFileValid } from './misc'
 import * as magnetUtil from 'magnet-uri'
 
 const VIDEOS_CONSTRAINTS_FIELDS = CONSTRAINTS_FIELDS.VIDEOS
@@ -81,8 +81,8 @@ function isVideoFileExtnameValid (value: string) {
   return exists(value) && (value === VIDEO_LIVE.EXTENSION || MIMETYPES.VIDEO.EXT_MIMETYPE[value] !== undefined)
 }
 
-function isVideoFile (files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[]) {
-  return isFileValid(files, MIMETYPES.VIDEO.MIMETYPES_REGEX, 'videofile', null)
+function isVideoFileMimeTypeValid (files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[]) {
+  return isFileMimeTypeValid(files, MIMETYPES.VIDEO.MIMETYPES_REGEX, 'videofile')
 }
 
 const videoImageTypes = CONSTRAINTS_FIELDS.VIDEOS.IMAGE.EXTNAME
@@ -143,12 +143,12 @@ export {
   isVideoFPSResolutionValid,
   isScheduleVideoUpdatePrivacyValid,
   isVideoOriginallyPublishedAtValid,
-  isVideoFile,
   isVideoMagnetUriValid,
   isVideoStateValid,
   isVideoViewsValid,
   isVideoRatingTypeValid,
   isVideoFileExtnameValid,
+  isVideoFileMimeTypeValid,
   isVideoDurationValid,
   isVideoTagValid,
   isVideoPrivacyValid,