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35 lines
1.5 KiB
35 lines
1.5 KiB
'use strict';
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const cache = require(__dirname+'/../../redis.js')
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, dynamicResponse = require(__dirname+'/../dynamic.js')
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, deleteTempFiles = require(__dirname+'/../files/deletetempfiles.js')
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, config = require(__dirname+'/../../config.js')
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, { batch } = require('dnsbl');
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module.exports = async (req, res, next) => {
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const { ipHeader, dnsbl, blockBypass } = config.get;
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if (dnsbl.enabled && dnsbl.blacklists.length > 0 //if dnsbl enabled and has more than 0 blacklists
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&& !res.locals.anonymizer //anonymizers cant be dnsbl'd
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&& (!res.locals.blockBypass || !blockBypass.bypassDnsbl)) { //and there is no valid block bypass, or they do not bypass dnsbl
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const ip = req.headers[ipHeader] || req.connection.remoteAddress;
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let isBlacklisted = await cache.get(`blacklisted:${ip}`);
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if (isBlacklisted === null) { //not cached
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const dnsblResp = await batch(ip, dnsbl.blacklists);
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isBlacklisted = dnsblResp.some(r => r.listed === true);
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await cache.set(`blacklisted:${ip}`, isBlacklisted, Math.floor(dnsbl.cacheTime/1000));
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}
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if (isBlacklisted) {
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deleteTempFiles(req).catch(e => console.error);
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return dynamicResponse(req, res, 403, 'message', {
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'title': 'Forbidden',
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'message': `Your request was blocked because your IP address is listed on a blacklist.${blockBypass.bypassDnsbl ? ' You can solve a "block bypass" to temporarily circumvent blacklisting.' : ''}`,
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'redirect': req.headers.referer || '/',
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'link': blockBypass.bypassDnsbl ? { text: 'Solve block bypass', href: '/bypass.html' } : null,
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});
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}
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}
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return next();
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}
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