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1 | import { parallel } from 'async' | |
2 | import * as express from 'express' | |
3 | import * as fs from 'fs' | |
4 | import { join } from 'path' | |
5 | import * as validator from 'validator' | |
6 | ||
7 | import { database as db } from '../initializers/database' | |
8 | import { | |
9 | CONFIG, | |
10 | REMOTE_SCHEME, | |
11 | STATIC_PATHS, | |
12 | STATIC_MAX_AGE | |
13 | } from '../initializers' | |
14 | import { root } from '../helpers' | |
15 | import { VideoInstance } from '../models' | |
16 | ||
17 | const clientsRouter = express.Router() | |
18 | ||
19 | // TODO: move to constants | |
20 | const opengraphComment = '<!-- opengraph tags -->' | |
21 | const distPath = join(root(), 'client', 'dist') | |
22 | const embedPath = join(distPath, 'standalone', 'videos', 'embed.html') | |
23 | const indexPath = join(distPath, 'index.html') | |
24 | ||
25 | // Special route that add OpenGraph tags | |
26 | // Do not use a template engine for a so little thing | |
27 | clientsRouter.use('/videos/watch/:id', generateWatchHtmlPage) | |
28 | ||
29 | clientsRouter.use('/videos/embed', function (req: express.Request, res: express.Response, next: express.NextFunction) { | |
30 | res.sendFile(embedPath) | |
31 | }) | |
32 | ||
33 | // Static HTML/CSS/JS client files | |
34 | clientsRouter.use('/client', express.static(distPath, { maxAge: STATIC_MAX_AGE })) | |
35 | ||
36 | // 404 for static files not found | |
37 | clientsRouter.use('/client/*', function (req: express.Request, res: express.Response, next: express.NextFunction) { | |
38 | res.sendStatus(404) | |
39 | }) | |
40 | ||
41 | // --------------------------------------------------------------------------- | |
42 | ||
43 | export { | |
44 | clientsRouter | |
45 | } | |
46 | ||
47 | // --------------------------------------------------------------------------- | |
48 | ||
49 | function addOpenGraphTags (htmlStringPage: string, video: VideoInstance) { | |
50 | let basePreviewUrlHttp | |
51 | ||
52 | if (video.isOwned()) { | |
53 | basePreviewUrlHttp = CONFIG.WEBSERVER.URL | |
54 | } else { | |
55 | basePreviewUrlHttp = REMOTE_SCHEME.HTTP + '://' + video.Author.Pod.host | |
56 | } | |
57 | ||
58 | // We fetch the remote preview (bigger than the thumbnail) | |
59 | // This should not overhead the remote server since social websites put in a cache the OpenGraph tags | |
60 | // We can't use the thumbnail because these social websites want bigger images (> 200x200 for Facebook for example) | |
61 | const previewUrl = basePreviewUrlHttp + STATIC_PATHS.PREVIEWS + video.getPreviewName() | |
62 | const videoUrl = CONFIG.WEBSERVER.URL + '/videos/watch/' + video.id | |
63 | ||
64 | const metaTags = { | |
65 | 'og:type': 'video', | |
66 | 'og:title': video.name, | |
67 | 'og:image': previewUrl, | |
68 | 'og:url': videoUrl, | |
69 | 'og:description': video.description, | |
70 | ||
71 | 'name': video.name, | |
72 | 'description': video.description, | |
73 | 'image': previewUrl, | |
74 | ||
75 | 'twitter:card': 'summary_large_image', | |
76 | 'twitter:site': '@Chocobozzz', | |
77 | 'twitter:title': video.name, | |
78 | 'twitter:description': video.description, | |
79 | 'twitter:image': previewUrl | |
80 | } | |
81 | ||
82 | let tagsString = '' | |
83 | Object.keys(metaTags).forEach(function (tagName) { | |
84 | const tagValue = metaTags[tagName] | |
85 | ||
86 | tagsString += '<meta property="' + tagName + '" content="' + tagValue + '" />' | |
87 | }) | |
88 | ||
89 | return htmlStringPage.replace(opengraphComment, tagsString) | |
90 | } | |
91 | ||
92 | function generateWatchHtmlPage (req: express.Request, res: express.Response, next: express.NextFunction) { | |
93 | const videoId = '' + req.params.id | |
94 | ||
95 | // Let Angular application handle errors | |
96 | if (!validator.isUUID(videoId, 4)) return res.sendFile(indexPath) | |
97 | ||
98 | parallel({ | |
99 | file: function (callback) { | |
100 | fs.readFile(indexPath, callback) | |
101 | }, | |
102 | ||
103 | video: function (callback) { | |
104 | db.Video.loadAndPopulateAuthorAndPodAndTags(videoId, callback) | |
105 | } | |
106 | }, function (err: Error, result: { file: Buffer, video: VideoInstance }) { | |
107 | if (err) return next(err) | |
108 | ||
109 | const html = result.file.toString() | |
110 | const video = result.video | |
111 | ||
112 | // Let Angular application handle errors | |
113 | if (!video) return res.sendFile(indexPath) | |
114 | ||
115 | const htmlStringPageWithTags = addOpenGraphTags(html, video) | |
116 | res.set('Content-Type', 'text/html; charset=UTF-8').send(htmlStringPageWithTags) | |
117 | }) | |
118 | } |