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Code Issues Releases Wiki Activity

Invite link checking based on chat ID rather than known invite links

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Thomas Rory Gummerson 2020-06-05 13:09:48 +02:00 committed by Wojciech Pawlik
parent 959bef339d
commit b271c53fd8
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2 changed files with 23 additions and 1 deletions
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23
handlers/middlewares/checkLinks.js
View File

@ -7,6 +7,7 @@ const { URL } = require('url');
const { taggedSum } = require('daggy');
const fetch = require('node-fetch');
const R = require('ramda');
const { jspack } = require('jspack');
const { isAdmin } = require('../../stores/user');
const { managesGroup } = require('../../stores/group');
@ -84,6 +85,26 @@ const isPublic = async username => {
}
};
const inviteLinkToGroupID = url => {
if (url.pathname.toLowerCase().startsWith('/joinchat/')) {
const [ , groupID ] =
jspack.Unpack(
'>LLC',
Buffer.from(url.pathname.split('/')[2], 'base64'),
);
return groupID;
}
throw new Error(`${url.toString()} is not an invite link`);
};
const inviteLinkIsManagedGroup = link => {
try {
return managesGroup({ id: inviteLinkToGroupID(link) });
} catch (err) {
return false;
}
};
const dh = {
blacklistedDomain: R.always(Action.Warn('Link to a blacklisted domain')),
nothing: R.always(Action.Nothing),
@ -94,7 +115,7 @@ const dh = {
return Action.Nothing;
}
if (url.searchParams.has('start')) return Action.Warn('Bot reflink');
if (await managesGroup({ link: url.toString() })) return Action.Nothing;
if (await inviteLinkIsManagedGroup(url)) return Action.Nothing;
const [ , username ] = R.match(/^\/(\w+)(?:\/\d*)?$/, url.pathname);
if (username && !await isPublic('@' + username)) return Action.Nothing;
return Action.Warn('Link to a Telegram group or channel');

1
package.json
View File

@ -32,6 +32,7 @@
"dependencies": {
"daggy": "^1.3.0",
"dedent-js": "^1.0.1",
"jspack": "0.0.4",
"millisecond": "^0.1.2",
"nedb-promise": "^2.0.1",
"node-fetch": "^2.2.0",