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facebook: do not request the source url & clean up

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fixed a vulnerability, removed useless variables, and cleaned up

thankfully we haven't built the image yesterday
This commit is contained in:
wukko 2024-07-25 11:57:02 +06:00
parent faeb96848b
commit 83af16bb12
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GPG key ID: 3E30B3F26C7B4AA2
4 changed files with 24 additions and 30 deletions
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3
src/modules/processing/match.js
View file

@ -203,8 +203,7 @@ export default async function(host, patternMatch, lang, obj) {
break; break;
case "facebook": case "facebook":
r = await facebook({ r = await facebook({
...patternMatch, ...patternMatch
sourceUrl: url.href
}); });
break; break;
default: default:

46
src/modules/processing/services/facebook.js
View file

@ -4,59 +4,53 @@ const headers = {
'User-Agent': genericUserAgent, 'User-Agent': genericUserAgent,
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8', '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-Language': 'en-US,en;q=0.5',
'Accept-Encoding': 'gzip, deflate, br',
'Sec-Fetch-Mode': 'navigate', 'Sec-Fetch-Mode': 'navigate',
'Sec-Fetch-Site': 'none', 'Sec-Fetch-Site': 'none',
} }
function resolveUrl(url) { const resolveUrl = (url) => {
return fetch(url, { headers }) return fetch(url, { headers })
.then(r => { .then(r => {
if (r.headers.get('location')) { if (r.headers.get('location')) {
return decodeURIComponent(r.headers.get('location')) return decodeURIComponent(r.headers.get('location'));
} }
if (r.headers.get('link')) { if (r.headers.get('link')) {
const linkMatch = r.headers.get('link').match(/<(.*?)\/>/) const linkMatch = r.headers.get('link').match(/<(.*?)\/>/);
return decodeURIComponent(linkMatch[1]) return decodeURIComponent(linkMatch[1]);
} }
return false return false;
}) })
.catch(() => false) .catch(() => false);
} }
export default async function({ sourceUrl, shortLink, username, id }) { export default async function({ id, shareType, shortLink }) {
const isShortLink = !!shortLink?.length let url = `https://web.facebook.com/i/videos/${id}`;
const isSharedLink = !!sourceUrl.match(/\/share\/\w\//)?.length
let url = isShortLink if (shareType) url = `https://web.facebook.com/share/${shareType}/${id}`;
? `https://fb.watch/${shortLink}` if (shortLink) url = await resolveUrl(`https://fb.watch/${shortLink}`);
: `https://web.facebook.com/${username}/videos/${id}`
if (isShortLink) url = await resolveUrl(url)
if (isSharedLink) url = sourceUrl
const html = await fetch(url, { headers }) const html = await fetch(url, { headers })
.then(r => r.text()) .then(r => r.text())
.catch(() => false) .catch(() => false);
if (!html) return { error: 'ErrorCouldntFetch' }; if (!html) return { error: 'ErrorCouldntFetch' };
const urls = [] const urls = [];
const hd = html.match('"browser_native_hd_url":(".*?")') const hd = html.match('"browser_native_hd_url":(".*?")');
const sd = html.match('"browser_native_sd_url":(".*?")') const sd = html.match('"browser_native_sd_url":(".*?")');
if (hd?.[1]) urls.push(JSON.parse(hd[1])) if (hd?.[1]) urls.push(JSON.parse(hd[1]));
if (sd?.[1]) urls.push(JSON.parse(sd[1])) if (sd?.[1]) urls.push(JSON.parse(sd[1]));
if (!urls.length) { if (!urls.length) {
return { error: 'ErrorEmptyDownload' }; return { error: 'ErrorEmptyDownload' };
} }
let filename = `facebook_${id || shortLink}.mp4` const baseFilename = `facebook_${id || shortLink}`;
return { return {
urls: urls[0], urls: urls[0],
filename, filename: `${baseFilename}.mp4`,
audioFilename: `${filename.slice(0, -4)}_audio`, audioFilename: `${baseFilename}_audio`,
}; };
} }

2
src/modules/processing/servicesConfig.json
View file

@ -134,7 +134,7 @@
":username/videos/:caption/:id", ":username/videos/:caption/:id",
":username/videos/:id", ":username/videos/:id",
"reel/:id", "reel/:id",
"share/:shortLink/:id" "share/:shareType/:id"
], ],
"enabled": true "enabled": true
} }

3
src/modules/processing/servicesPatternTesters.js
View file

@ -68,5 +68,6 @@ export const testers = {
patternMatch.shortLink?.length <= 11 patternMatch.shortLink?.length <= 11
|| patternMatch.username?.length <= 30 || patternMatch.username?.length <= 30
|| patternMatch.caption?.length <= 255 || patternMatch.caption?.length <= 255
|| patternMatch.id?.length <= 20, || patternMatch.id?.length <= 20 && !patternMatch.shareType
|| patternMatch.id?.length <= 20 && patternMatch.shareType?.length === 1,
} }