64 lines
1.8 KiB
JavaScript
64 lines
1.8 KiB
JavaScript
const { promisify } = require('util')
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const dns = require('dns')
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const lookup = promisify(dns.lookup)
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const request = require('request')
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const { DEV, SERVER_IP } = require('../config')
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// https://www.torproject.org/projects/tordnsel.html.en
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// check if request comes from tor
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const fromTor = async (req, res, next) => {
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if (DEV) {
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req.fromTor = req.query.fromTor || false
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return next()
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}
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const sourceIp = req.headers['x-forwarded-for'] || req.connection.remoteAddress
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const ip = sourceIp.split('.').reverse().join('.')
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const reversedServerIp = SERVER_IP.split('.').reverse().join('.')
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const domain = `${ip}.80.${reversedServerIp}.ip-port.exitlist.torproject.org`
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try {
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const ret = await lookup(domain, {})
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req.fromTor = (ret.address === '127.0.0.2')
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} catch(e) {
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req.fromTor = false
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}
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next()
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}
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// check if request comes from proxy/VPN/tor
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const fromVpn = async (req, res, next) => {
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if (DEV) {
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req.fromVpn = req.query.fromVpn || false
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return next()
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}
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const sourceIp = req.headers['x-forwarded-for'] || req.connection.remoteAddress
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const baseUrl = 'https://check.getipintel.net/check.php?ip='
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const url = `${baseUrl}${sourceIp}&contact=anna@fugadalcontrollo.org`
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request(url,
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(err, res, body) => {
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if (!err && res.statusCode === 200) {
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req.fromVpn = parseFloat(body)>0.5
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} else {
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req.fromVpn = false
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}
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next()
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})
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}
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const checkCountry = (req, res, next) => {
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if (DEV) {
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return next()
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}
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const sourceIp = req.headers['x-forwarded-for'] || req.connection.remoteAddress
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request(`http://ip-api.com/json/${sourceIp}`, (err, res, body) => {
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if (!err && res.statusCode === 200) {
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try {
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req.geoinfo = JSON.parse(body)
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} catch (e) {}
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}
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next()
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})
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}
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module.exports = { fromTor, fromVpn, checkCountry }
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