node-http-proxyを使ったいわゆるバーチャルホスト対応Webサーバー(WebSocket対応版)

gistfile1.js

var http = require('http'),
    httpProxy = require('http-proxy'),
    logger = require('./logger');

// localhost:8001 に普通のExpressアプリ -> http://test.nov1.jp/
// localhost:8002 にWebSocketを使ったExpressアプリ -> http://😄.nov1.jp/, http://chat.nov1.jp/

// Proxy for Chat app
var proxy = new httpProxy.HttpProxy({
  target: {
    host: 'localhost',
    port: 8002
  }});

// Proxy for Test app
var testProxy = new httpProxy.HttpProxy({
  target: {
    host: 'localhost',
    port: 8001
  }});

var webSocketProxy = new httpProxy.HttpProxy({
  target: {
    host: 'localhost',
    port: 8002
  }});

var server = http.createServer(logger(true, function ( req, res ) {
  //console.log(req.headers.host);
  //console.log(req.headers);
  if (req.headers.host == 'test.nov1.jp' || req.headers.host == 'xn--tu8h.nov1.jp') {
    testProxy.proxyRequest( req, res );
  } else if (req.headers.host == 'chat.nov1.jp' || req.headers.host == 'xn--i28h.nov1.jp') {
    proxy.proxyRequest( req, res );
  } else {
    res.writeHead(404);
    res.end();
  }
}));

server.on( 'upgrade', function( req, socket, head ) {
  req.headers['x-forwarded-for']   = req.connection.remoteAddress || req.connection.socket.remoteAddress;
  //console.log(req.headers);
  webSocketProxy.proxyWebSocketRequest( req, socket, head );
});

server.listen(80);

logger.js

// c.f. http://blog.nodejitsu.com/http-proxy-middlewares

var fs = require('fs'),
    http = require('http');

var logFile = fs.createWriteStream('/root/requests.log', {flags: 'a', encoding: 'utf8'});

module.exports = function (logging, next) {
  return function (request, response) {
    if (logging) {
      logFile.write(JSON.stringify(request.headers, true, 2));
    }
    next(request, response);
  }
}

• test._でもchat._でも無い時は404を返す
• WebSocketでオリジナルIPが抜けてしまうのでヘッダのx-forwarded-forに入れる

• Loggerを追加。飛んできたリクエストヘッダをすべてJSONでファイルに書き出す。