feat: add facebook support

src/modules/processing/match.js

@@ -25,6 +25,7 @@ import twitch from "./services/twitch.js";
 import rutube from "./services/rutube.js";
 import dailymotion from "./services/dailymotion.js";
 import loom from "./services/loom.js";
+import facebook from "./services/facebook.js";
 
 let freebind;
 
@@ -192,6 +193,8 @@ export default async function(host, patternMatch, lang, obj) {
                 r = await loom({
                     id: patternMatch.id
                 });
+            case "facebook":
+                r = await facebook(patternMatch);
                 break;
             default:
                 return createResponse("error", {

src/modules/processing/services/facebook.js

@@ -0,0 +1,71 @@
+import { genericUserAgent } from "../../config.js";
+
+const headers = {
+    'User-Agent': genericUserAgent,
+    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8',
+    'Accept-Language': 'en-US,en;q=0.5',
+    'Accept-Encoding': 'gzip, deflate, br',
+    'Sec-Fetch-Mode': 'navigate',
+    'Sec-Fetch-Site': 'none',
+}
+
+async function resolveUrl(url) {
+    return await fetch(url, { headers })
+        .then(r => {
+            if (r.headers.get('location')) {
+                return decodeURIComponent(r.headers.get('location'))
+            }
+            if (r.headers.get('link')) {
+                const linkMatch = r.headers.get('link').match(/<(.*?)\/>/)
+                return decodeURIComponent(linkMatch[1])
+            }
+            return false
+        })
+        .catch(() => false)
+}
+
+export default async function ({ shortLink, username, id }) {
+    const isShortLink = !!shortLink?.length
+
+    let url = isShortLink
+        ? `https://fb.watch/${shortLink}`
+        : `https://web.facebook.com/${username}/videos/${id}`
+
+    if (isShortLink) {
+        url = await resolveUrl(url)
+    }
+
+    const html = await fetch(url, { headers })
+        .then(r => r.text())
+        .catch(() => false)
+
+    if (!html) return { error: 'ErrorCouldntFetch' };
+
+    const urls = []
+    const hd = html.match('"browser_native_hd_url":"(.*?)"')
+    const sd = html.match('"browser_native_sd_url":"(.*?)"')
+
+    if (hd?.length) {
+        urls.push(JSON.parse(`["${hd[1]}"]`)[0])
+    }
+    if (sd?.length) {
+        urls.push(JSON.parse(`["${sd[1]}"]`)[0])
+    }
+
+    if (!urls.length) {
+        return { error: 'ErrorEmptyDownload' };
+    }
+
+    let filename = `facebook_${id}.mp4`
+    if (isShortLink) {
+        filename = `facebook_${shortLink}.mp4`
+    } else if (username?.length && username !== 'user') {
+        filename = `facebook_${username}_${id}.mp4`
+    }
+
+    return {
+        urls: urls[0],
+        filename,
+        audioFilename: `${filename.slice(0, -4)}_audio`,
+    };
+}

src/modules/processing/servicesConfig.json

@@ -118,6 +118,18 @@
             "alias": "loom videos",
             "patterns": ["share/:id"],
             "enabled": true
+        },
+        "facebook": {
+            "alias": "facebook videos",
+            "altDomains": ["fb.watch"],
+            "subdomains": ["web"],
+            "patterns": [
+                "_shortLink/:shortLink",
+                ":username/videos/:caption/:id",
+                ":username/videos/:id",
+                "reel/:id"
+            ],
+            "enabled": true
         }
     }
 }

src/modules/processing/servicesPatternTesters.js

@@ -58,4 +58,10 @@ export const testers = {
 
     "youtube": (patternMatch) =>
         patternMatch.id?.length <= 11,
+
+    "facebook": (patternMatch) =>
+        patternMatch.shortLink?.length <= 11
+        || patternMatch.username?.length <= 30
+        || patternMatch.caption?.length <= 255
+        || patternMatch.id?.length <= 20,
 }

src/modules/processing/url.js

@@ -23,7 +23,7 @@ function aliasURL(url) {
                 ** but we only care about the 1st segment of the path */
                 url = new URL(`https://youtube.com/watch?v=${
                     encodeURIComponent(parts[1])
-                }`)
+                    }`)
             }
             break;
 
@@ -31,7 +31,7 @@ function aliasURL(url) {
             if (url.hostname === 'pin.it' && parts.length === 2) {
                 url = new URL(`https://pinterest.com/url_shortener/${
                     encodeURIComponent(parts[1])
-                }`)
+                    }`)
             }
             break;
 
@@ -64,6 +64,16 @@ function aliasURL(url) {
             if (url.hostname === 'dai.ly' && parts.length === 2) {
                 url = new URL(`https://dailymotion.com/video/${parts[1]}`)
             }
+
+        case "facebook":
+        case "fb":
+            if (url.searchParams.get('v')) {
+                url = new URL(`https://web.facebook.com/user/videos/${url.searchParams.get('v')}`)
+            }
+            if (url.hostname === 'fb.watch') {
+                url = new URL(`https://web.facebook.com/_shortLink/${parts[1]}`)
+            }
+            break;
             break;
         case "ddinstagram":
             if (services.instagram.altDomains.includes(host.domain) && [null, 'd', 'g'].includes(host.subdomain)) {

src/util/tests.json

@@ -1160,5 +1160,54 @@
             "code": 200,
             "status": "stream"
         }
+    }],
+    "facebook": [{
+        "name": "direct video with username and id",
+        "url": "https://web.facebook.com/100048111287134/videos/1157798148685638/",
+        "params": {},
+        "expected": {
+            "code": 200,
+            "status": "stream"
+        }
+    }, {
+        "name": "direct video with id as query param",
+        "url": "https://web.facebook.com/watch/?v=883839773514682&ref=sharing",
+        "params": {},
+        "expected": {
+            "code": 200,
+            "status": "stream"
+        }
+    }, {
+        "name": "direct video with caption",
+        "url": "https://web.facebook.com/wood57/videos/𝐒𝐞𝐛𝐚𝐬𝐤𝐨𝐦-𝐟𝐮𝐥𝐥/883839773514682",
+        "params": {},
+        "expected": {
+            "code": 200,
+            "status": "stream"
+        }
+    }, {
+        "name": "shortlink video",
+        "url": "https://fb.watch/r1K6XHMfGT/",
+        "params": {},
+        "expected": {
+            "code": 200,
+            "status": "stream"
+        }
+    }, {
+        "name": "reel video",
+        "url": "https://web.facebook.com/reel/730293269054758",
+        "params": {},
+        "expected": {
+            "code": 200,
+            "status": "stream"
+        }
+    }, {
+        "name": "shared video link",
+        "url": "https://www.facebook.com/share/v/NEf87jbPTvFE8LsL/",
+        "params": {},
+        "expected": {
+            "code": 200,
+            "status": "stream"
+        }
     }]
 }