Removed direct dependence on http module

Author: wesleytodd

lib/application.js

@@ -599,8 +599,8 @@ app.render = function render(name, options, callback) {
  */
 
 app.listen = function listen() {
-  var server = http.createServer(this);
-  return server.listen.apply(server, arguments);
+  var server = this.createServer(this)
+  return server.listen.apply(server, arguments)
 };
 
 /**

lib/express.js

@@ -14,11 +14,36 @@
 
 var EventEmitter = require('events').EventEmitter;
 var mixin = require('merge-descriptors');
+var setPrototypeOf = require('setprototypeof')
 var proto = require('./application');
 var Router = require('router');
 var req = require('./request');
 var res = require('./response');
 
+/**
+ * Only reqire http when requested
+ */
+var http = {};
+var _http;
+Object.defineProperty(http, 'IncomingMessage', {
+  get: function () {
+    _http = _http || require('http')
+    return _http.IncomingMessage
+  }
+});
+Object.defineProperty(http, 'ServerResponse', {
+  get: function () {
+    _http = _http || require('http')
+    return _http.ServerResponse
+  }
+});
+Object.defineProperty(http, 'createServer', {
+  get: function () {
+    _http = _http || require('http')
+    return _http.createServer
+  }
+});
+
 /**
  * Expose `createApplication()`.
  */
@@ -32,16 +57,22 @@ exports = module.exports = createApplication;
  * @api public
  */
 
-function createApplication() {
+function createApplication(opts) {
+  opts = opts || {}
+  opts.reqProto = opts.reqProto || http.IncomingMessage.prototype
+  opts.resProto = opts.resProto || http.ServerResponse.prototype
+  opts.createServer = opts.createServer || http.createServer
+
   var app = function(req, res, next) {
     app.handle(req, res, next);
   };
 
   mixin(app, EventEmitter.prototype, false);
   mixin(app, proto, false);
 
-  app.request = { __proto__: req, app: app };
-  app.response = { __proto__: res, app: app };
+  app.createServer = opts.createServer
+  app.request = setPrototypeOf({ app: app }, req(opts.reqProto))
+  app.response = setPrototypeOf({ app: app }, res(opts.resProto))
   app.init();
   return app;
 }
@@ -51,8 +82,8 @@ function createApplication() {
  */
 
 exports.application = proto;
-exports.request = req;
-exports.response = res;
+exports.request = req.proto
+exports.response = res.proto
 
 /**
  * Expose constructors.

lib/request.js

@@ -16,19 +16,24 @@
 var accepts = require('accepts');
 var isIP = require('net').isIP;
 var typeis = require('type-is');
-var http = require('http');
 var fresh = require('fresh');
 var parseRange = require('range-parser');
 var parse = require('parseurl');
 var proxyaddr = require('proxy-addr');
+var setPrototypeOf = require('setprototypeof')
+
+/**
+ * Export with proto
+ */
+exports = module.exports = function (proto) {
+  return setPrototypeOf(req, proto)
+}
 
 /**
  * Request prototype.
  */
 
-var req = exports = module.exports = {
-  __proto__: http.IncomingMessage.prototype
-};
+var req = module.exports.proto = {}
 
 /**
  * Return request header.

lib/response.js

@@ -16,7 +16,6 @@ var contentDisposition = require('content-disposition');
 var deprecate = require('depd')('express');
 var encodeUrl = require('encodeurl');
 var escapeHtml = require('escape-html');
-var http = require('http');
 var onFinished = require('on-finished');
 var path = require('path');
 var pathIsAbsolute = require('path-is-absolute');
@@ -25,21 +24,27 @@ var sign = require('cookie-signature').sign;
 var normalizeType = require('./utils').normalizeType;
 var normalizeTypes = require('./utils').normalizeTypes;
 var setCharset = require('./utils').setCharset;
-var statusCodes = http.STATUS_CODES;
+var statusCodes = require('statuses/codes')
 var cookie = require('cookie');
 var send = require('send');
 var extname = path.extname;
 var mime = send.mime;
 var resolve = path.resolve;
 var vary = require('vary');
+var setPrototypeOf = require('setprototypeof')
+
+/**
+ * Export with proto
+ */
+exports = module.exports = function (proto) {
+  return setPrototypeOf(res, proto)
+}
 
 /**
  * Response prototype.
  */
 
-var res = module.exports = {
-  __proto__: http.ServerResponse.prototype
-};
+var res = module.exports.proto = {}
 
 /**
  * Module variables.

package.json

@@ -52,6 +52,8 @@
     "router": "~1.1.5",
     "send": "0.14.2",
     "serve-static": "~1.11.2",
+    "setprototypeof": "~1.0.3",
+    "statuses": "^1.3.1",
     "type-is": "~1.6.14",
     "utils-merge": "1.0.0",
     "vary": "~1.1.0"