text: /*
  	Copyright (c) 2004-2006, The Dojo Foundation
  	All Rights Reserved.
  
  	Licensed under the Academic Free License version 2.1 or above OR the
  	modified BSD license. For more information on Dojo licensing, see:
  
  		http://dojotoolkit.org/community/licensing.shtml
  */
  
  dojo.provide("dojo.io.XhrIframeProxy");
  
  dojo.require("dojo.experimental");
  dojo.experimental("dojo.io.XhrIframeProxy");
  
  dojo.require("dojo.io.IframeIO");
  dojo.require("dojo.dom");
  dojo.require("dojo.uri.Uri");
  
  dojo.io.XhrIframeProxy = {
  	//summary: Object that implements the iframe handling for XMLHttpRequest
  	//IFrame Proxying.
  	//description: Do not use this object directly. See the Dojo Book page
  	//on XMLHttpRequest IFrame Proxying:
  	//http://manual.dojotoolkit.org/WikiHome/DojoDotBook/Book75
  	//Usage of XHR IFrame Proxying does not work from local disk in Safari.
  
  	xipClientUrl: djConfig["xipClientUrl"] || dojo.uri.dojoUri("src/io/xip_client.html"),
  
  	_state: {},
  	_stateIdCounter: 0,
  
  	needFrameRecursion: function(){
  		return (true == dojo.render.html.ie70);
  	},
  
  	send: function(facade){		
  		var stateId = "XhrIframeProxy" + (this._stateIdCounter++);
  		facade._stateId = stateId;
  
  
  		var frameUrl = this.xipClientUrl + "#0:init:id=" + stateId + "&server=" 
  			+ encodeURIComponent(facade._ifpServerUrl) + "&fr=false";
  		if(this.needFrameRecursion()){
  			//IE7 hack. Need to load server URL, and have that load the xip_client.html.
  			//Also, this server URL needs to different from the one eventually loaded by xip_client.html
  			//Otherwise, IE7 will not load it. Funky.
  			var fullClientUrl = window.location.href.substring(0, window.location.href.lastIndexOf("/") + 1);
  			fullClientUrl += this.xipClientUrl;
  		
  			var serverUrl = facade._ifpServerUrl
  				+ (facade._ifpServerUrl.indexOf("?") == -1 ? "?" : "&") + "dojo.fr=1";
  
  			frameUrl = serverUrl + "#0:init:id=" + stateId + "&client=" 
  				+ encodeURIComponent(fullClientUrl) + "&fr=" + this.needFrameRecursion(); //fr is for Frame Recursion
  		}
  
  		this._state[stateId] = {
  			facade: facade,
  			stateId: stateId,
  			clientFrame: dojo.io.createIFrame(stateId, "", frameUrl)
  		};
  		
  		return stateId;
  	},
  	
  	receive: function(/*String*/stateId, /*String*/urlEncodedData){
  		/* urlEncodedData should have the following params:
  				- responseHeaders
  				- status
  				- statusText
  				- responseText
  		*/
  		//Decode response data.
  		var response = {};
  		var nvPairs = urlEncodedData.split("&");
  		for(var i = 0; i < nvPairs.length; i++){
  			if(nvPairs[i]){
  				var nameValue = nvPairs[i].split("=");
  				response[decodeURIComponent(nameValue[0])] = decodeURIComponent(nameValue[1]);
  			}
  		}
  
  		//Set data on facade object.
  		var state = this._state[stateId];
  		var facade = state.facade;
  
  		facade._setResponseHeaders(response.responseHeaders);
  		if(response.status == 0 || response.status){
  			facade.status = parseInt(response.status, 10);
  		}
  		if(response.statusText){
  			facade.statusText = response.statusText;
  		}
  		if(response.responseText){
  			facade.responseText = response.responseText;
  			
  			//Fix responseXML.
  			var contentType = facade.getResponseHeader("Content-Type");
  			if(contentType && (contentType == "application/xml" || contentType == "text/xml")){
  				facade.responseXML = dojo.dom.createDocumentFromText(response.responseText, contentType);
  			}
  		}
  		facade.readyState = 4;
  		
  		this.destroyState(stateId);
  	},
  
  	clientFrameLoaded: function(/*String*/stateId){
  		var state = this._state[stateId];
  		var facade = state.facade;
  
  		if(this.needFrameRecursion()){
  			var clientWindow = window.open("", state.stateId + "_clientEndPoint");
  		}else{
  			var clientWindow = state.clientFrame.contentWindow;
  		}
  
  		var reqHeaders = [];
  		for(var param in facade._requestHeaders){
  			reqHeaders.push(param + ": " + facade._requestHeaders[param]);
  		}
  		
  		var requestData = {
  			uri: facade._uri
  		};
  		if(reqHeaders.length > 0){
  			requestData.requestHeaders = reqHeaders.join("\r\n");		
  		}
  		if(facade._method){
  			requestData.method = facade._method;
  		}
  		if(facade._bodyData){
  			requestData.data = facade._bodyData;
  		}
  
  		clientWindow.send(dojo.io.argsFromMap(requestData, "utf8"));
  	},
  	
  	destroyState: function(/*String*/stateId){
  		var state = this._state[stateId];
  		if(state){
  			delete this._state[stateId];
  			var parentNode = state.clientFrame.parentNode;
  			parentNode.removeChild(state.clientFrame);
  			state.clientFrame = null;
  			state = null;
  		}
  	},
  
  	createFacade: function(){
  		if(arguments && arguments[0] && arguments[0]["iframeProxyUrl"]){
  			return new dojo.io.XhrIframeFacade(arguments[0]["iframeProxyUrl"]);
  		}else{
  			return dojo.io.XhrIframeProxy.oldGetXmlhttpObject.apply(dojo.hostenv, arguments);
  		}
  	}
  }
  
  //Replace the normal XHR factory with the proxy one.
  dojo.io.XhrIframeProxy.oldGetXmlhttpObject = dojo.hostenv.getXmlhttpObject;
  dojo.hostenv.getXmlhttpObject = dojo.io.XhrIframeProxy.createFacade;
  
  /**
  	Using this a reference: http://www.w3.org/TR/XMLHttpRequest/
  
  	Does not implement the onreadystate callback since dojo.io.BrowserIO does
  	not use it.
  */
  dojo.io.XhrIframeFacade = function(ifpServerUrl){
  	//summary: XMLHttpRequest facade object used by dojo.io.XhrIframeProxy.
  	
  	//description: Do not use this object directly. See the Dojo Book page
  	//on XMLHttpRequest IFrame Proxying:
  	//http://manual.dojotoolkit.org/WikiHome/DojoDotBook/Book75
  	this._requestHeaders = {};
  	this._allResponseHeaders = null;
  	this._responseHeaders = {};
  	this._method = null;
  	this._uri = null;
  	this._bodyData = null;
  	this.responseText = null;
  	this.responseXML = null;
  	this.status = null;
  	this.statusText = null;
  	this.readyState = 0;
  	
  	this._ifpServerUrl = ifpServerUrl;
  	this._stateId = null;
  }
  
  dojo.lang.extend(dojo.io.XhrIframeFacade, {
  	//The open method does not properly reset since Dojo does not reuse XHR objects.
  	open: function(/*String*/method, /*String*/uri){
  		this._method = method;
  		this._uri = uri;
  
  		this.readyState = 1;
  	},
  	
  	setRequestHeader: function(/*String*/header, /*String*/value){
  		this._requestHeaders[header] = value;
  	},
  	
  	send: function(/*String*/stringData){
  		this._bodyData = stringData;
  		
  		this._stateId = dojo.io.XhrIframeProxy.send(this);
  		
  		this.readyState = 2;
  	},
  	abort: function(){
  		dojo.io.XhrIframeProxy.destroyState(this._stateId);
  	},
  	
  	getAllResponseHeaders: function(){
  		return this._allResponseHeaders; //String
  	},
  	
  	getResponseHeader: function(/*String*/header){
  		return this._responseHeaders[header]; //String
  	},
  	
  	_setResponseHeaders: function(/*String*/allHeaders){
  		if(allHeaders){
  			this._allResponseHeaders = allHeaders;
  			
  			//Make sure ther are now CR characters in the headers.
  			allHeaders = allHeaders.replace(/\r/g, "");
  			var nvPairs = allHeaders.split("\n");
  			for(var i = 0; i < nvPairs.length; i++){
  				if(nvPairs[i]){
  					var nameValue = nvPairs[i].split(": ");
  					this._responseHeaders[nameValue[0]] = nameValue[1];
  				}
  			}
  		}
  	}
  });
  