Media retrieval refactor; first pass
This commit is contained in:
Calvin Montgomery
parent
7477c64ae2
commit
90437e5ac2
265
get-info.js
265
get-info.js
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@ -14,6 +14,21 @@ var https = require("https");
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var Logger = require("./logger.js");
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var Media = require("./media.js").Media;
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function urlRetrieve(transport, options, callback) {
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var req = transport.request(options, function (res) {
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var buffer = "";
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res.setEncoding("utf-8");
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res.on("data", function (chunk) {
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buffer += chunk;
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});
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res.on("end", function () {
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callback(res.statusCode, buffer);
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});
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});
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req.end();
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}
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// Helper function for making an HTTP request and getting the result
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// as JSON
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function getJSONInternal(transport, options, callback) {
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@ -63,6 +78,256 @@ function getJSONHTTPS(options, callback) {
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getJSONInternal(https, options, callback);
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}
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var Getters = {
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/* youtube.com */
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yt: function (id, callback) {
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var options = {
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host: "gdata.youtube.com",
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port: 443,
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path: "/feeds/api/videos/" + id + "?v=2&alt=json",
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method: "GET",
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dataType: "jsonp",
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timeout: 1000
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};
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urlRetrieve(https, options, function (status, data) {
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if(status !== 200) {
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callback(true, null);
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return;
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}
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try {
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data = JSON.parse(data);
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var seconds = data.entry.media$group.yt$duration.seconds;
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var title = data.entry.title.$t;
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var media = new Media(id, title, seconds, "yt");
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callback(false, media);
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} catch(e) {
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// Gdata version 2 has the rather silly habit of
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// returning error codes in XML when I explicitly asked
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// for JSON
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var m = buffer.match(/<internalReason>([^<]+)<\/internalReason>/);
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if(m === null)
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m = buffer.match(/<code>([^<]+)<\/code>/);
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var err = true;
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if(m) {
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if(m[1] === "too_many_recent_calls") {
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err = "YouTube is throttling the server right "+
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"now for making too many requests. "+
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"Please try again in a moment.";
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} else {
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err = m[1];
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}
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}
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callback(err, null);
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}
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});
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},
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// TODO Add youtube playlists
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/* vimeo.com */
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vi: function (id, callback) {
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var options = {
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host: "vimeo.com",
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port: 443,
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path: "/api/v2/video/" + id + ".json",
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method: "GET",
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dataType: "jsonp",
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timeout: 1000
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};
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urlRetrieve(https, options, function (status, data) {
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if(status !== 200) {
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callback(true, null);
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return;
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}
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try {
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data = JSON.parse(data);
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data = data[0];
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var seconds = data.duration;
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var title = data.title;
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var media = new Media(id, title, seconds, "vi");
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callback(false, media);
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} catch(e) {
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var err = true;
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if(buffer.match(/not found/))
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err = "Video not found";
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callback(err, null);
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}
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});
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},
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/* dailymotion.com */
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dm: function (id, callback) {
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// Dailymotion's API is an example of an API done right
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// - Supports SSL
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// - I can ask for exactly which fields I want
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// - URL is simple
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// - Field names are sensible
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// Other media providers take notes, please
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var options = {
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host: "api.dailymotion.com",
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port: 443,
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path: "/video/" + id + "?fields=duration,title",
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method: "GET",
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dataType: "jsonp",
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timeout: 1000
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};
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urlRetrieve(https, options, function (status, data) {
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if(status !== 200) {
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callback(true, null);
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return;
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}
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try {
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data = JSON.parse(data);
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var title = data.title;
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var seconds = data.duration;
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var media = new Media(id, title, seconds, "dm");
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callback(false, media);
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} catch(e) {
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// TODO See what kinds of errors DM returns
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var err = true;
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callback(err, null);
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}
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});
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},
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/* soundcloud.com */
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sc: function (id, callback) {
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// Soundcloud's API is badly designed and badly documented
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// In order to lookup track data from a URL, I have to first
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// make a call to /resolve to get the track id, then make a second
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// call to /tracks/{track.id} to actally get useful data
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// This is a waste of bandwidth and a pain in the ass
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const SC_CLIENT = "2e0c82ab5a020f3a7509318146128abd";
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var options = {
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host: "api.soundcloud.com",
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port: 443,
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path: "/resolve.json?url=" + id + "&client_id=" + SC_CLIENT,
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method: "GET",
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dataType: "jsonp",
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timeout: 1000
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};
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urlRetrieve(https, options, function (status, data) {
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if(status !== 302) {
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callback(true, null);
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return;
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}
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var track = null;
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try {
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data = JSON.parse(data);
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track = data.location;
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} catch(e) {
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callback(true, null);
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return;
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}
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var options2 = {
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host: "api.soundcloud.com",
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port: 443,
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path: track,
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method: "GET",
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dataType: "jsonp",
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timeout: 1000
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};
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// I want to get off async's wild ride
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urlRetrieve(https, options2, function (status, data) {
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if(status !== 200) {
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callback(true, null);
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return;
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}
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try {
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data = JSON.parse(data);
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// Duration is in ms, but I want s
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var seconds = data.duration / 1000;
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var title = data.title;
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var media = new Media(id, title, seconds, "sc");
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callback(false, media);
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} catch(e) {
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callback(true, null);
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}
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});
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});
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},
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/* livestream.com */
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li: function (id, callback) {
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var title = "Livestream.com - " + id;
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var media = new Media(id, title, "--:--", "li");
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callback(false, media);
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},
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/* twitch.tv */
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tw: function (id, callback) {
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var title = "Twitch.tv - " + id;
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var media = new Media(id, title, "--:--", "tw");
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callback(false, media);
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},
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/* justin.tv */
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jt: function (id, callback) {
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var title = "Justin.tv - " + id;
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var media = new Media(id, title, "--:--", "jt");
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callback(false, media);
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},
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/* ustream.tv */
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us: function (id, callback) {
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var options = {
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host: "www.ustream.tv",
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port: 80,
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path: "/" + id,
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method: "GET",
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timeout: 1000
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};
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urlRetrieve(http, options, function (status, data) {
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if(status !== 200) {
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callback(true, null);
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return;
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}
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// Regexing the ID out of the HTML because
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// Ustream's API is so horribly documented
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// I literally could not figure out how to retrieve
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// this information.
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//
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// [](/eatadick)
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var m = data.match(/cid":([0-9]+)/);
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if(m) {
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var title = "Ustream.tv - " + id;
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var media = new Media(m[1], title, "--:--", "us");
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callback(false, media);
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}
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callback(true, null);
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});
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},
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/* JWPlayer */
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jw: function (id, callback) {
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var title = "JWPlayer - " + id;
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var media = new Media(id, title, "--:--", "jw");
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callback(false, media);
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}
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}
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exports.Getters = Getters;
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// Look up YouTube metadata
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// Fairly straightforward
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exports.getYTInfo = function(id, callback) {
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