Simple Forward Proxy for BitTorrent Tracker.

tracker-proxy.js

'use strict';

const http = require('http');
const qs = require('querystring')
const url = require('url');
const util = require('util')
const request = require('request')

var ip;

// Server 

var server = http.createServer((req, resp) => {
    if (req.method == 'GET') {
        var rurl = url.parse(req.url);
        var target = `http://${rurl.pathname.substring(1)}`;
        var qs = `${rurl.query}&ip=${ip}`;
        console.log(`${target}?${qs}`);
        request({
            url: `${target}?${qs}`,
            headers: {
                'X-Forwarded-For': ip
            },
            proxy: 'http://192.168.2.3:8118',
            tunnel: true
        }, (err, rresp, body) => {
            if (!err) {
                resp.writeHead(resp.statusCode, resp.headers);
                resp.end(body);
            } else {
                resp.writeHead(504);
                resp.end();
            }
        })
    } else {
        resp.writeHead(405);
        resp.end();
    }
})

// Get My IP

request({
    url: "http://ip.cn",
    headers: {
        'User-Agent': 'curl/7.38.0'
    }
}, (err, resp, body) => {
    if (!err && resp.statusCode == 200){
        ip = /(\d+\.\d+\.\d+\.\d+)/.exec(body)[1];
        console.log(ip);
        server.listen(8200)
    }
        else throw err;
})