(function () { 'use strict'; var net = require('net'); var WebSocket = require('ws'); var sni = require('sni'); var pack = require('tunnel-packer').pack; var authenticated = false; // TODO move these helpers to tunnel-packer package function addrToId(address) { return address.family + ',' + address.address + ',' + address.port; } /* function socketToAddr(socket) { return { family: socket.remoteFamily, address: socket.remoteAddress, port: socket.remotePort }; } function socketToId(socket) { return addrToId(socketToAddr(socket)); } */ /* var request = require('request'); request.get('https://pokemap.hellabit.com:3000?access_token=' + token, { rejectUnauthorized: false }, function (err, resp) { console.log('resp.body'); console.log(resp.body); }); return; //*/ function run(copts) { var services = copts.services; // TODO pair with hostname / sni var token = copts.token; var tunnelUrl = copts.stunneld + '/?access_token=' + token; var wstunneler; var retry = true; var localclients = {}; // BaaS / Backendless / noBackend / horizon.io // user authentication // a place to store data // file management // Synergy Teamwork Paradigm = Jabberwocky var handlers = { onmessage: function (opts) { var cid = addrToId(opts); var service = opts.service; var port = services[service]; var servername; var str; var m; authenticated = true; if (localclients[cid]) { //console.log("[=>] received data from '" + cid + "' =>", opts.data.byteLength); localclients[cid].write(opts.data); return; } else if ('http' === service) { str = opts.data.toString(); m = str.match(/(?:^|[\r\n])Host: ([^\r\n]+)[\r\n]*/im); servername = (m && m[1].toLowerCase() || '').split(':')[0]; } else if ('https' === service) { servername = sni(opts.data); } else { handlers._onLocalError(cid, opts, new Error("unsupported service '" + service + "'")); return; } if (!servername) { console.info("[error] missing servername for '" + cid + "'", opts.data.byteLength); //console.warn(opts.data.toString()); wstunneler.send(pack(opts, null, 'error'), { binary: true }); return; } console.info("[connect] new client '" + cid + "' for '" + servername + "' (" + (handlers._numClients() + 1) + " clients)"); localclients[cid] = net.createConnection({ port: port, host: '127.0.0.1' }, function () { //console.log("[=>] first packet from tunneler to '" + cid + "' as '" + opts.service + "'", opts.data.byteLength); localclients[cid].write(opts.data); }); localclients[cid].on('data', function (chunk) { //console.log("[<=] local '" + opts.service + "' sent to '" + cid + "' <= ", chunk.byteLength, "bytes"); //console.log(JSON.stringify(chunk.toString())); wstunneler.send(pack(opts, chunk), { binary: true }); }); localclients[cid].on('error', function (err) { handlers._onLocalError(cid, opts, err); }); localclients[cid].on('end', function () { console.info("[end] closing client '" + cid + "' for '" + servername + "' (" + (handlers._numClients() - 1) + " clients)"); handlers._onLocalClose(cid, opts); }); } , onend: function (opts) { var cid = addrToId(opts); //console.log("[end] '" + cid + "'"); handlers._onend(cid); } , onerror: function (opts) { var cid = addrToId(opts); //console.log("[error] '" + cid + "'", opts.code || '', opts.message); handlers._onend(cid); } , _onend: function (cid) { if (localclients[cid]) { try { localclients[cid].end(); } catch(e) { // ignore } } delete localclients[cid]; } , _onLocalClose: function (cid, opts, err) { try { wstunneler.send(pack(opts, null, err && 'error' || 'end'), { binary: true }); } catch(e) { // ignore } delete localclients[cid]; } , _onLocalError: function (cid, opts, err) { console.info("[error] closing '" + cid + "' because '" + err.message + "' (" + (handlers._numClients() - 1) + " clients)"); handlers._onLocalClose(cid, opts, err); } , _numClients: function () { return Object.keys(localclients).length; } }; var wsHandlers = { onOpen: function () { console.info("[open] connected to '" + copts.stunneld + "'"); } , onClose: function () { if (!authenticated) { console.info('[close] failed on first attempt... check authentication.'); } else if (retry) { console.info('[retry] disconnected and waiting...'); setTimeout(run, 5000, copts); } else { console.info('[close] closing tunnel to exit...'); } process.removeListener('exit', wsHandlers.onExit); process.removeListener('SIGINT', wsHandlers.onExit); Object.keys(localclients).forEach(function (cid) { try { localclients[cid].end(); } catch(e) { // ignore } delete localclients[cid]; }); } , onError: function (err) { console.error("[tunnel error] " + err.message); console.error(err); } , onExit: function () { retry = false; try { wstunneler.close(); } catch(e) { console.error("[error] wstunneler.close()"); console.error(e); // ignore } } }; var machine = require('tunnel-packer').create(handlers); console.info("[connect] '" + copts.stunneld + "'"); wstunneler = new WebSocket(tunnelUrl, { rejectUnauthorized: !copts.insecure }); wstunneler.on('open', wsHandlers.onOpen); wstunneler.on('message', function (data, flags) { if (data.error || '{' === data[0]) { console.log(data); return; } machine.fns.addChunk(data, flags); }); wstunneler.on('close', wsHandlers.onClose); wstunneler.on('error', wsHandlers.onError); process.on('exit', wsHandlers.onExit); process.on('SIGINT', wsHandlers.onExit); } module.exports.connect = run; }());