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xip.js
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xip.js
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if(!dojo._hasResource["dojox.io.proxy.xip"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.io.proxy.xip"] = true;
dojo.provide("dojox.io.proxy.xip");
dojo.require("dojo.io.iframe");
dojo.require("dojox.data.dom");
dojox.io.proxy.xip = {
//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://dojotoolkit.org/book/dojo-book-0-4/part-5-connecting-pieces/i-o/cross-domain-xmlhttprequest-using-iframe-proxy
//Usage of XHR IFrame Proxying does not work from local disk in Safari.
xipClientUrl: djConfig["xipClientUrl"] || dojo.moduleUrl("dojox.io.proxy", "xip_client.html"),
_state: {},
_stateIdCounter: 0,
needFrameRecursion: function(){
return (dojo.isIE >= 7);
},
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.split("#")[0].split("?")[0];
if((this.xipClientUrl + "").charAt(0) == "/"){
var endIndex = fullClientUrl.indexOf("://");
endIndex = fullClientUrl.indexOf("/", endIndex + 3);
fullClientUrl = fullClientUrl.substring(0, endIndex);
}else{
fullClientUrl = fullClientUrl.substring(0, fullClientUrl.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.iframe.create(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 = dojox.data.dom.createDocument(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.objectToQuery(requestData));
},
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 dojox.io.proxy.xip.XhrIframeFacade(arguments[0].iframeProxyUrl);
}else{
return dojox.io.proxy.xip._xhrObjOld.apply(dojo, arguments);
}
}
}
//Replace the normal XHR factory with the proxy one.
dojox.io.proxy.xip._xhrObjOld = dojo._xhrObj;
dojo._xhrObj = dojox.io.proxy.xip.createFacade;
/**
Using this a reference: http://www.w3.org/TR/XMLHttpRequest/
Does not implement the onreadystate callback since dojo.xhr* does
not use it.
*/
dojox.io.proxy.xip.XhrIframeFacade = function(ifpServerUrl){
//summary: XMLHttpRequest facade object used by dojox.io.proxy.xip.
//description: Do not use this object directly. See the Dojo Book page
//on XMLHttpRequest IFrame Proxying:
//http://dojotoolkit.org/book/dojo-book-0-4/part-5-connecting-pieces/i-o/cross-domain-xmlhttprequest-using-iframe-proxy
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.extend(dojox.io.proxy.xip.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 = dojox.io.proxy.xip.send(this);
this.readyState = 2;
},
abort: function(){
dojox.io.proxy.xip.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];
}
}
}
}
});
}

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xip.js (6 KB)

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