/*!
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* express
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* Copyright(c) 2009-2013 TJ Holowaychuk
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* Copyright(c) 2013 Roman Shtylman
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* Copyright(c) 2014-2015 Douglas Christopher Wilson
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* MIT Licensed
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*/
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'use strict';
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/**
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* Module dependencies.
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* @private
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*/
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var setPrototypeOf = require('setprototypeof')
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/**
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* Initialization middleware, exposing the
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* request and response to each other, as well
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* as defaulting the X-Powered-By header field.
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*
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* @param {Function} app
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* @return {Function}
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* @api private
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*/
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exports.init = function(app){
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return function expressInit(req, res, next){
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if (app.enabled('x-powered-by')) res.setHeader('X-Powered-By', 'Express');
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req.res = res;
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res.req = req;
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req.next = next;
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setPrototypeOf(req, app.request)
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setPrototypeOf(res, app.response)
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res.locals = res.locals || Object.create(null);
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next();
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};
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};
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