2017-12-08 01:21:42 +00:00
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const http = require('http');
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const Server = http.Server;
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const domain = require('domain');
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const socks = require('socksv5');
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const URL = require('url');
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const SocksProxyAgent = require('socks-proxy-agent');
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class HTTPServer extends Server {
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constructor(tor_pool, logger) {
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let handle_http_connections = (req, res) => {
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let d = domain.create();
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2017-12-08 01:52:10 +00:00
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d.on('error', (error) => {
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this.logger.error(`[http-proxy]: an error occured: ${error.message}`)
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res.end();
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});
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2017-12-08 01:21:42 +00:00
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d.add(req);
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d.add(res);
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let url = URL.parse(req.url);
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url.port = url.port || 80;
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var buffer = [];
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function onIncomingData(chunk) {
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buffer.push(chunk);
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}
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function preConnectClosed() {
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req.finished = true;
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}
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req.on('data', onIncomingData);
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req.on('end', preConnectClosed);
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let connect = (tor_instance) => {
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let socks_port = tor_instance.socks_port;
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2017-12-08 01:52:10 +00:00
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logger && logger.info(`[http-proxy]: ${req.connection.remoteAddress}:${req.connection.remotePort} → 127.0.0.1:${socks_port} → ${url.hostname}:${url.port}`);
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2017-12-08 01:21:42 +00:00
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d.run(() => {
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let proxy_req = http.request({
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method: req.method,
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hostname: url.hostname,
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port: url.port,
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path: url.path,
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headers: req.headers,
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agent: new SocksProxyAgent(`socks://127.0.0.1:${socks_port}`)
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}, (proxy_res) => {
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d.add(proxy_res);
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proxy_res.on('data', (chunk) => {
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res.write(chunk);
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});
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proxy_res.on('end', () => {
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res.end();
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});
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res.writeHead(proxy_res.statusCode, proxy_res.headers);
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});
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req.removeListener('data', onIncomingData);
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req.on('data', (chunk) => {
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proxy_req.write(chunk);
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})
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req.on('end', () => {
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proxy_req.end();
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})
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while (buffer.length) {
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proxy_req.write(buffer.shift());
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}
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if (req.finished)
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proxy_req.end();
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d.add(proxy_req);
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});
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};
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if (tor_pool.instances.length) {
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connect(tor_pool.next());
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} else {
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2017-12-08 01:52:10 +00:00
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logger.debug(`[http-proxy]: a connection has been attempted, but no tor instances are live... waiting for an instance to come online`);
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2017-12-08 01:21:42 +00:00
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tor_pool.once('instance_created', connect);
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}
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};
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2017-12-08 01:52:10 +00:00
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let handle_connect_connections = (req, inbound_socket, head) => {
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2017-12-08 01:21:42 +00:00
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let d = domain.create();
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2017-12-08 01:52:10 +00:00
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d.add(inbound_socket);
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2017-12-08 01:21:42 +00:00
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2017-12-08 01:52:10 +00:00
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let hostname = req.url.split(':').shift();
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let port = Number(req.url.split(':').pop());
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2017-12-08 01:21:42 +00:00
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let connect = (tor_instance) => {
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let socks_port = tor_instance.socks_port;
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2017-12-08 01:52:10 +00:00
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logger && logger.info(`[http-connect]: ${req.connection.remoteAddress}:${req.connection.remotePort} → 127.0.0.1:${socks_port} → ${hostname}:${port}`)
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var outbound_socket;
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2017-12-08 01:21:42 +00:00
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let onClose = (error) => {
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inbound_socket && inbound_socket.end();
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outbound_socket && outbound_socket.end();
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inbound_socket = outbound_socket = buffer = void(0);
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if (error)
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2017-12-08 01:52:10 +00:00
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this.logger.error(`[http-connect]: an error occured: ${error.message}`)
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2017-12-08 01:21:42 +00:00
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d.exit();
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};
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2017-12-08 01:52:10 +00:00
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d.on('error', onClose);
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d.add(inbound_socket);
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var buffer = [head];
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let onInboundData = function (data) {
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buffer.push(data);
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};
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2017-12-08 01:21:42 +00:00
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d.run(() => {
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socks.connect({
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host: hostname,
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port: port,
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proxyHost: '127.0.0.1',
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proxyPort: socks_port,
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localDNS: false,
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auths: [ socks.auth.None() ]
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}, ($outbound_socket) => {
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outbound_socket = $outbound_socket;
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d.add(outbound_socket);
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outbound_socket && outbound_socket.on('close', onClose);
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outbound_socket && outbound_socket.on('error', onClose);
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2017-12-08 01:52:10 +00:00
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inbound_socket.write('HTTP/1.1 200 Connection Established\r\n'+'Proxy-agent: tor-router\r\n' +'\r\n');
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outbound_socket.write(head);
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outbound_socket.pipe(inbound_socket);
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inbound_socket.pipe(outbound_socket);
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2017-12-08 01:21:42 +00:00
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})
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});
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};
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if (tor_pool.instances.length) {
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connect(tor_pool.next());
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} else {
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2017-12-08 01:52:10 +00:00
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logger.debug(`[http-connect]: a connection has been attempted, but no tor instances are live... waiting for an instance to come online`);
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2017-12-08 01:21:42 +00:00
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tor_pool.once('instance_created', connect);
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}
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};
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super(handle_http_connections);
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2017-12-08 01:52:10 +00:00
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this.on('connect', handle_connect_connections);
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2017-12-08 01:21:42 +00:00
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this.logger = logger;
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this.tor_pool = tor_pool;
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}
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};
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module.exports = HTTPServer;
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