mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
133 lines
4.3 KiB
JavaScript
133 lines
4.3 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cu = Components.utils;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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XPCOMUtils.defineLazyGetter(this, "cpmm", function() {
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return Cc["@mozilla.org/childprocessmessagemanager;1"]
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.getService(Ci.nsIMessageSender);
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});
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// Splits parameters in a query string.
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function extractParameters(aQuery) {
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let params = aQuery.split("&");
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let res = {};
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params.forEach(function(aParam) {
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let obj = aParam.split("=");
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res[obj[0]] = decodeURIComponent(obj[1]);
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});
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return res;
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}
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function YoutubeProtocolHandler() {
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}
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YoutubeProtocolHandler.prototype = {
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classID: Components.ID("{c3f1b945-7e71-49c8-95c7-5ae9cc9e2bad}"),
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIProtocolHandler]),
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scheme: "vnd.youtube",
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defaultPort: -1,
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protocolFlags: Ci.nsIProtocolHandler.URI_NORELATIVE |
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Ci.nsIProtocolHandler.URI_NOAUTH |
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Ci.nsIProtocolHandler.URI_LOADABLE_BY_ANYONE,
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// Sample URL:
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// vnd.youtube:iNuKL2Gy_QM?vndapp=youtube_mobile&vndclient=mv-google&vndel=watch&vnddnc=1
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newURI: function yt_phNewURI(aSpec, aOriginCharset, aBaseURI) {
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let uri = Cc["@mozilla.org/network/standard-url;1"]
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.createInstance(Ci.nsIStandardURL);
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let id = aSpec.substring(this.scheme.length + 1);
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id = id.substring(0, id.indexOf('?'));
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uri.init(Ci.nsIStandardURL.URLTYPE_STANDARD, -1, this.scheme + "://dummy_host/" + id, aOriginCharset,
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aBaseURI);
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return uri.QueryInterface(Ci.nsIURI);
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},
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newChannel: function yt_phNewChannel(aURI) {
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// Get a list of streams for this video id.
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let infoURI = "http://www.youtube.com/get_video_info?&video_id=" +
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aURI.path.substring(1);
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let xhr = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"]
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.createInstance(Ci.nsIXMLHttpRequest);
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xhr.open("GET", infoURI, true);
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xhr.addEventListener("load", function() {
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// Youtube sends the response as a double wrapped url answer:
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// we first extract the url_encoded_fmt_stream_map parameter,
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// and from each comma-separated entry in this value, we extract
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// other parameters (url and type).
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let key = "url_encoded_fmt_stream_map=";
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let pos = xhr.responseText.indexOf(key);
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if (pos == -1) {
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return;
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}
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let streams = decodeURIComponent(xhr.responseText
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.substring(pos + key.length)).split(",");
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let uri;
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let mimeType;
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// itag is an undocumented value which maps to resolution and mimetype
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// see https://en.wikipedia.org/wiki/YouTube#Quality_and_codecs
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// Ordered from least to most preferred
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let recognizedItags = [
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"17", // 144p 3GP
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"36", // 240p 3GP
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"43", // 360p WebM
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#ifdef MOZ_WIDGET_GONK
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"18", // 360p H.264
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#endif
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];
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let bestItag = -1;
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let extras = { }
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streams.forEach(function(aStream) {
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let params = extractParameters(aStream);
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let url = params["url"];
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let type = params["type"] ? params["type"].split(";")[0] : null;
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let itag = params["itag"];
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let index;
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if (url && type && ((index = recognizedItags.indexOf(itag)) != -1) &&
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index > bestItag) {
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uri = url + '&signature=' + (params["sig"] ? params['sig'] : '');
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mimeType = type;
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bestItag = index;
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}
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for (let param in params) {
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if (["thumbnail_url", "length_seconds", "title"].indexOf(param) != -1) {
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extras[param] = decodeURIComponent(params[param]);
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}
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}
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});
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if (uri && mimeType) {
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cpmm.sendAsyncMessage("content-handler", {
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url: uri,
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type: mimeType,
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extras: extras
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});
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}
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});
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xhr.send(null);
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throw Components.results.NS_ERROR_ILLEGAL_VALUE;
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},
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allowPort: function yt_phAllowPort(aPort, aScheme) {
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return false;
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}
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};
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this.NSGetFactory = XPCOMUtils.generateNSGetFactory([YoutubeProtocolHandler]);
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