jschan - Anonymous imageboard software. Classic look, modern features and feel. Works without JavaScript and supports Tor, I2P, Lokinet, etc.
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'use strict';
const escapeRegExp = require(__dirname+'/escaperegexp.js')
, { isIP } = require('net')
, Permissions = require(__dirname+'/permissions.js');
module.exports = (query, permissions) => {
if (query.ip && typeof query.ip === 'string') {
const decoded = decodeURIComponent(query.ip);
if (permissions.get(Permissions.VIEW_RAW_IP) //allow raw ip query, if has perms to view raw ip
&& (isIP(decoded) || decoded.match(/[a-z0-9]{24}/i))) { //and is ip or bypass
return decoded;
} else if (decoded.length === 10) { //otherwise, only allow last 10 char substring
return new RegExp(`${escapeRegExp(decoded)}$`);
}
}
return null; //else, no ip filter
}