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Try to find og:video and og:audio on html pages
This commit is contained in:
Pavel Djundik
parent
fe51c6d7e7
commit
58d9490c2a
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@ -7,13 +7,13 @@
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{{/equal}}
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{{#equal type "audio"}}
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<audio controls preload="metadata">
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<source src="{{link}}" type="{{res}}">
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<source src="{{media}}" type="{{mediaType}}">
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Your browser does not support the audio element.
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</audio>
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{{/equal}}
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{{#equal type "video"}}
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<video preload="metadata" controls>
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<source src="{{link}}" type="{{res}}">
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<source src="{{media}}" type="{{mediaType}}">
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Your browser does not support the video element.
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</video>
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{{/equal}}
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@ -9,6 +9,9 @@ const cleanIrcMessage = require("../../../client/js/libs/handlebars/ircmessagepa
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const findLinks = require("../../../client/js/libs/handlebars/ircmessageparser/findLinks");
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const storage = require("../storage");
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const mediaTypeRegex = /^(audio|video)\/.+/;
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const linkRegex = /^https?:\/\//;
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// Fix ECDH curve client compatibility in Node v8/v9
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// This is fixed in Node 10, but The Lounge supports LTS versions
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// https://github.com/nodejs/node/issues/16196
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@ -30,7 +33,7 @@ module.exports = function(client, chan, msg) {
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const cleanText = cleanIrcMessage(msg.text);
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// We will only try to prefetch http(s) links
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const links = findLinks(cleanText).filter((w) => /^https?:\/\//.test(w.link));
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const links = findLinks(cleanText).filter((w) => linkRegex.test(w.link));
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if (links.length === 0) {
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return;
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@ -65,51 +68,108 @@ module.exports = function(client, chan, msg) {
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});
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};
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function parse(msg, preview, res, client) {
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switch (res.type) {
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case "text/html": {
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function parseHtml(preview, res, client) {
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return new Promise((resolve) => {
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const $ = cheerio.load(res.data);
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preview.type = "link";
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preview.head =
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$('meta[property="og:title"]').attr("content")
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|| $("title").text()
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|| "";
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preview.body =
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$('meta[property="og:description"]').attr("content")
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|| $('meta[name="description"]').attr("content")
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|| "";
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preview.thumb =
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$('meta[property="og:image"]').attr("content")
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|| $('meta[name="twitter:image:src"]').attr("content")
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|| $('link[rel="image_src"]').attr("href")
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|| "";
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if (preview.thumb.length) {
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preview.thumb = url.resolve(preview.link, preview.thumb);
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}
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return parseHtmlMedia($, preview, res, client)
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.then((newRes) => resolve(newRes))
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.catch(() => {
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preview.type = "link";
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preview.head =
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$('meta[property="og:title"]').attr("content")
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|| $("title").text()
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|| "";
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preview.body =
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$('meta[property="og:description"]').attr("content")
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|| $('meta[name="description"]').attr("content")
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|| "";
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preview.thumb =
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$('meta[property="og:image"]').attr("content")
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|| $('meta[name="twitter:image:src"]').attr("content")
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|| $('link[rel="image_src"]').attr("href")
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|| "";
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// Make sure thumbnail is a valid url
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if (!/^https?:\/\//.test(preview.thumb)) {
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preview.thumb = "";
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}
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if (preview.thumb.length) {
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preview.thumb = url.resolve(preview.link, preview.thumb);
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}
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// Verify that thumbnail pic exists and is under allowed size
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if (preview.thumb.length) {
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fetch(escapeHeader(preview.thumb), {language: client.language}, (resThumb) => {
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if (resThumb === null
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|| !(/^image\/.+/.test(resThumb.type))
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|| resThumb.size > (Helper.config.prefetchMaxImageSize * 1024)) {
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// Make sure thumbnail is a valid url
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if (!linkRegex.test(preview.thumb)) {
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preview.thumb = "";
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}
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handlePreview(client, msg, preview, resThumb);
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// Verify that thumbnail pic exists and is under allowed size
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if (preview.thumb.length) {
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fetch(escapeHeader(preview.thumb), {language: client.language}, (resThumb) => {
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if (resThumb === null
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|| !(/^image\/.+/.test(resThumb.type))
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|| resThumb.size > (Helper.config.prefetchMaxImageSize * 1024)) {
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preview.thumb = "";
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}
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resolve(resThumb);
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});
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} else {
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resolve(res);
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}
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});
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});
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}
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return;
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function parseHtmlMedia($, preview, res, client) {
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return new Promise((resolve, reject) => {
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let foundMedia = false;
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["video", "audio"].forEach((type) => {
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if (foundMedia) {
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return;
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}
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$(`meta[property="og:${type}:type"]`).each(function(i) {
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const mimeType = $(this).attr("content");
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if (mediaTypeRegex.test(mimeType)) {
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// If we match a clean video or audio tag, parse that as a preview instead
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const mediaUrl = $($(`meta[property="og:${type}"]`).get(i)).attr("content");
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// Make sure media is a valid url
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if (!mediaUrl.startsWith("https://")) {
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return;
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}
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foundMedia = true;
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fetch(escapeHeader(mediaUrl), {language: client.language}, (resMedia) => {
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if (resMedia === null || !mediaTypeRegex.test(resMedia.type)) {
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return reject();
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}
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preview.type = type;
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preview.media = mediaUrl;
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preview.mediaType = resMedia.type;
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resolve(resMedia);
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});
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return false;
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}
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});
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});
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if (!foundMedia) {
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reject();
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}
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});
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}
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function parse(msg, preview, res, client) {
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let promise;
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switch (res.type) {
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case "text/html":
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promise = parseHtml(preview, res, client);
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break;
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}
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case "image/png":
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case "image/gif":
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@ -141,7 +201,8 @@ function parse(msg, preview, res, client) {
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}
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preview.type = "audio";
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preview.res = res.type;
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preview.media = preview.link;
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preview.mediaType = res.type;
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break;
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@ -152,8 +213,9 @@ function parse(msg, preview, res, client) {
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break;
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}
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preview.res = res.type;
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preview.type = "video";
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preview.media = preview.link;
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preview.mediaType = res.type;
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break;
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@ -161,7 +223,11 @@ function parse(msg, preview, res, client) {
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return;
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}
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handlePreview(client, msg, preview, res);
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if (!promise) {
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return handlePreview(client, msg, preview, res);
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}
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promise.then((newRes) => handlePreview(client, msg, preview, newRes));
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}
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function handlePreview(client, msg, preview, res) {
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@ -248,8 +314,9 @@ function fetch(uri, {language}, cb) {
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if (contentLength > limit) {
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req.abort();
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}
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} else if (/^(audio|video)\/.+/.test(res.headers["content-type"])) {
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req.abort(); // ensure server doesn't download the audio file
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} else if (mediaTypeRegex.test(res.headers["content-type"])) {
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// We don't need to download the file any further after we received content-type header
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req.abort();
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} else {
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// if not image, limit download to 50kb, since we need only meta tags
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// twitter.com sends opengraph meta tags within ~20kb of data for individual tweets
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