implement multi handler http server

app.js

@@ -2,7 +2,7 @@
 
 var env = process.env.NODE_ENV || 'development',
 	db = require('./db'),
-	http = require('http'),
+	httpServer = require('./lib/httpServer'),
 	nodeStatic = require('node-static'),
 	path = require('path'),
 	fs = require('fs'),
@@ -24,19 +24,66 @@ var staticPath = path.join(__dirname, 'static'),
 	staticServer = new nodeStatic.Server(staticPath),
 	staticDataServer;
 
-var server = http.createServer(function(req, res) {
+var httpServerLogger = libLogger('http server');
+
+app.httpServer = httpServer.create();
+
+app.httpServer.on('error', function(err, req, res) {
+	httpServerLogger.error(
+		'Error processing request ' + req.method + ' ' + req.url + ':',
+		err.stack || err
+	);
+	if (!res.headersSent) {
+		res.statusCode = 500;
+		res.end();
+	}
+});
+
+app.httpServer.addRequestListener(function(req, res, next) {
+	var start = Date.now();
+
+	res.on('finish', function() {
+		var end = Date.now();
+
+		httpServerLogger.log(
+			'[%s] %s %s %s - %s ms',
+			new Date(end).toUTCString(),
+			req.method,
+			req.url,
+			res.statusCode,
+			end - start
+		);
+	});
+
+	next();
+});
+
+app.httpServer.addRequestListener(function(req, res, next) {
 	if (req.url.indexOf('/api/') === 0) {
-		return httpApi(req, res);
+		return httpApi(req, res, next);
+	} else {
+		next();
 	}
+});
 
-	if (new RegExp('^/projects/(\\w|-)+/workspace').test(req.url)) {
+app.httpServer.addRequestListener(function(req, res, next) {
+	if (new RegExp('^/projects/(\\w|-)+/workspace/').test(req.url)) {
 		return staticDataServer.serve(req, res);
+	} else {
+		next();
 	}
+});
 
-	if (req.url.indexOf('/data.io.js') === -1) {
+app.httpServer.addRequestListener(function(req, res, next) {
-		if (/(js|css|fonts|images)/.test(req.url)) {
+	if (new RegExp('^/(js|css|fonts|images)/').test(req.url)) {
 		staticServer.serve(req, res);
 	} else {
+		next();
+	}
+});
+
+app.httpServer.addRequestListener(function(req, res, next) {
+	if (req.url.indexOf('/data.io.js') === -1) {
 		// serve index for all app pages
 		if (env === 'development') {
 			var jade = require('jade');
@@ -49,14 +96,14 @@ var server = http.createServer(function(req, res) {
 			fs.createReadStream(path.join(staticPath, 'index.html'))
 				.pipe(res);
 		}
-		}
+	} else {
+		next();
 	}
 });
 
-var socketio = require('socket.io')(server);
+var socketio = require('socket.io')(app.httpServer);
 var dataio = require('./dataio')(socketio);
 
-app.server = server;
 app.dataio = dataio;
 
 app.lib = {};
@@ -248,7 +295,7 @@ Steppy(
 		var host = app.config.http.host,
 			port = app.config.http.port;
 		logger.log('Start http server on %s:%s', host, port);
-		app.server.listen(port, host);
+		app.httpServer.listen(port, host);
 	},
 	function(err) {
 		if (err) throw err;

httpApi.js

@@ -142,7 +142,7 @@ module.exports = function(app) {
 		);
 	});
 
-	return function(req, res) {
+	return function(req, res, next) {
 
 		Steppy(
 			function() {
@@ -175,11 +175,7 @@ module.exports = function(app) {
 					res.end();
 				}
 			},
-			function(err) {
+			next
-				logger.error('Error occurred during request: ', err.stack || err);
-				res.statusCode = 500;
-				res.end();
-			}
 		);
 	};
 

lib/httpServer.js

@@ -0,0 +1,40 @@
+'use strict';
+
+var http = require('http'),
+	inherits = require('util').inherits;
+
+function Server() {
+	var self = this;
+
+	self.requestListeners = [];
+
+	return http.Server.call(self, function(req, res) {
+		self._processRequestListeners(req, res, 0);
+	});
+}
+
+inherits(Server, http.Server);
+
+Server.prototype.addRequestListener = function(requestListener) {
+	this.requestListeners.push(requestListener);
+};
+
+Server.prototype._processRequestListeners = function(req, res, index) {
+	var self = this;
+
+	self.requestListeners[index](req, res, function(err) {
+		if (err) {
+			self.emit('error', err, req, res);
+		} else {
+			index++;
+			if (self.requestListeners[index]) {
+				self._processRequestListeners(req, res, index);
+			}
+		}
+	});
+};
+
+exports.create = function() {
+	return new Server;
+};
+