/*! * Connect * Copyright(c) 2011 TJ Holowaychuk * MIT Licensed */ /** * Module dependencies. */ var http = require('http') , res = http.ServerResponse.prototype , setHeader = res.setHeader , _renderHeaders = res._renderHeaders , writeHead = res.writeHead; // apply only once if (!res._hasConnectPatch) { /** * Provide a public "header sent" flag * until node does. * * @return {Boolean} * @api public */ res.__defineGetter__('headerSent', function(){ return this._header; }); /** * Set header `field` to `val`, special-casing * the `Set-Cookie` field for multiple support. * * @param {String} field * @param {String} val * @api public */ res.setHeader = function(field, val){ var key = field.toLowerCase() , prev; // special-case Set-Cookie if (this._headers && 'set-cookie' == key) { if (prev = this.getHeader(field)) { val = Array.isArray(prev) ? prev.concat(val) : [prev, val]; } // charset } else if ('content-type' == key && this.charset) { val += '; charset=' + this.charset; } return setHeader.call(this, field, val); }; /** * Proxy to emit "header" event. */ res._renderHeaders = function(){ if (!this._emittedHeader) this.emit('header'); this._emittedHeader = true; return _renderHeaders.call(this); }; res.writeHead = function(){ if (!this._emittedHeader) this.emit('header'); this._emittedHeader = true; return writeHead.apply(this, arguments); }; res._hasConnectPatch = true; }