+++ /dev/null
-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.
-
- /*
- This code is really focused on just sending one complete request to the server, and
- receiving one complete response per iframe. The code does not expect to reuse iframes for multiple XHR request/response
- sequences. This might be reworked later if performance indicates a need for it.
-
- xip fragment identifier/hash values have the form:
- #id:cmd:realEncodedMessage
-
- id: some ID that should be unique among message fragments. No inherent meaning,
- just something to make sure the hash value is unique so the message
- receiver knows a new message is available.
-
- cmd: command to the receiver. Valid values are:
- - init: message used to init the frame. Sent as the first URL when loading
- the page. Contains some config parameters.
- - loaded: the remote frame is loaded. Only sent from xip_client.html to this module.
- - ok: the message that this page sent was received OK. The next message may
- now be sent.
- - start: the start message of a block of messages (a complete message may
- need to be segmented into many messages to get around the limitiations
- of the size of an URL that a browser accepts.
- - part: indicates this is a part of a message.
- - end: the end message of a block of messages. The message can now be acted upon.
- If the message is small enough that it doesn't need to be segmented, then
- just one hash value message can be sent with "end" as the command.
-
- To reassemble a segmented message, the realEncodedMessage parts just have to be concatenated
- together.
- */
-
- xipClientUrl: ((dojo.config || djConfig)["xipClientUrl"]) || dojo.moduleUrl("dojox.io.proxy", "xip_client.html"),
-
-
- //MSIE has the lowest limit for URLs with fragment identifiers,
- //at around 4K. Choosing a slightly smaller number for good measure.
- urlLimit: 4000,
-
- _callbackName: (dojox._scopeName || "dojox") + ".io.proxy.xip.fragmentReceived",
- _state: {},
- _stateIdCounter: 0,
- _isWebKit: navigator.userAgent.indexOf("WebKit") != -1,
-
-
- send: function(/*Object*/facade){
- //summary: starts the xdomain request using the provided facade.
- //This method first does some init work, then delegates to _realSend.
-
- var url = this.xipClientUrl;
- //Make sure we are not dealing with javascript urls, just to be safe.
- if(url.split(":")[0].match(/javascript/i) || facade._ifpServerUrl.split(":")[0].match(/javascript/i)){
- return;
- }
-
- //Make xip_client a full URL.
- var colonIndex = url.indexOf(":");
- var slashIndex = url.indexOf("/");
- if(colonIndex == -1 || slashIndex < colonIndex){
- //No colon or we are starting with a / before a colon, so we need to make a full URL.
- var loc = window.location.href;
- if(slashIndex == 0){
- //Have a full path, just need the domain.
- url = loc.substring(0, loc.indexOf("/", 9)) + url; //Using 9 to get past http(s)://
- }else{
- url = loc.substring(0, (loc.lastIndexOf("/") + 1)) + url;
- }
- }
- this.fullXipClientUrl = url;
-
- //Set up an HTML5 messaging listener if postMessage exists.
- //As of this writing, this is only useful to get Opera 9.25+ to work.
- if(typeof document.postMessage != "undefined"){
- document.addEventListener("message", dojo.hitch(this, this.fragmentReceivedEvent), false);
- }
-
- //Now that we did first time init, always use the realSend method.
- this.send = this._realSend;
- return this._realSend(facade); //Object
- },
-
- _realSend: function(facade){
- //summary: starts the actual xdomain request using the provided facade.
- var stateId = "XhrIframeProxy" + (this._stateIdCounter++);
- facade._stateId = stateId;
-
- var frameUrl = facade._ifpServerUrl + "#0:init:id=" + stateId + "&client="
- + encodeURIComponent(this.fullXipClientUrl) + "&callback=" + encodeURIComponent(this._callbackName);
-
- this._state[stateId] = {
- facade: facade,
- stateId: stateId,
- clientFrame: dojo.io.iframe.create(stateId, "", frameUrl),
- isSending: false,
- serverUrl: facade._ifpServerUrl,
- requestData: null,
- responseMessage: "",
- requestParts: [],
- idCounter: 1,
- partIndex: 0,
- serverWindow: null
- };
-
- return stateId; //Object
- },
-
- 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){
- var mimeType = contentType.split(";")[0];
- if(mimeType.indexOf("application/xml") == 0 || mimeType.indexOf("text/xml") == 0){
- facade.responseXML = dojox.data.dom.createDocument(response.responseText, contentType);
- }
- }
- }
- facade.readyState = 4;
-
- this.destroyState(stateId);
- },
-
- frameLoaded: function(/*String*/stateId){
- var state = this._state[stateId];
- var facade = state.facade;
-
- 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;
- }
-
- this.sendRequest(stateId, 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);
- }
- },
-
- //**** State-bound methods ****
- sendRequest: function(stateId, encodedData){
- var state = this._state[stateId];
- if(!state.isSending){
- state.isSending = true;
-
- state.requestData = encodedData || "";
-
- //Get a handle to the server iframe.
- state.serverWindow = frames[state.stateId];
- if (!state.serverWindow){
- state.serverWindow = document.getElementById(state.stateId).contentWindow;
- }
-
- //Make sure we have contentWindow, but only do this for non-postMessage
- //browsers (right now just opera is postMessage).
- if(typeof document.postMessage == "undefined"){
- if(state.serverWindow.contentWindow){
- state.serverWindow = state.serverWindow.contentWindow;
- }
- }
-
- this.sendRequestStart(stateId);
- }
- },
-
- sendRequestStart: function(stateId){
- //Break the message into parts, if necessary.
- var state = this._state[stateId];
- state.requestParts = [];
- var reqData = state.requestData;
- var urlLength = state.serverUrl.length;
- var partLength = this.urlLimit - urlLength;
- var reqIndex = 0;
-
- while((reqData.length - reqIndex) + urlLength > this.urlLimit){
- var part = reqData.substring(reqIndex, reqIndex + partLength);
- //Safari will do some extra hex escaping unless we keep the original hex
- //escaping complete.
- var percentIndex = part.lastIndexOf("%");
- if(percentIndex == part.length - 1 || percentIndex == part.length - 2){
- part = part.substring(0, percentIndex);
- }
- state.requestParts.push(part);
- reqIndex += part.length;
- }
- state.requestParts.push(reqData.substring(reqIndex, reqData.length));
-
- state.partIndex = 0;
- this.sendRequestPart(stateId);
-
- },
-
- sendRequestPart: function(stateId){
- var state = this._state[stateId];
-
- if(state.partIndex < state.requestParts.length){
- //Get the message part.
- var partData = state.requestParts[state.partIndex];
-
- //Get the command.
- var cmd = "part";
- if(state.partIndex + 1 == state.requestParts.length){
- cmd = "end";
- }else if (state.partIndex == 0){
- cmd = "start";
- }
-
- this.setServerUrl(stateId, cmd, partData);
- state.partIndex++;
- }
- },
-
- setServerUrl: function(stateId, cmd, message){
- var serverUrl = this.makeServerUrl(stateId, cmd, message);
- var state = this._state[stateId];
-
- //Safari won't let us replace across domains.
- if(this._isWebKit){
- state.serverWindow.location = serverUrl;
- }else{
- state.serverWindow.location.replace(serverUrl);
- }
- },
-
- makeServerUrl: function(stateId, cmd, message){
- var state = this._state[stateId];
- var serverUrl = state.serverUrl + "#" + (state.idCounter++) + ":" + cmd;
- if(message){
- serverUrl += ":" + message;
- }
- return serverUrl;
- },
-
- fragmentReceivedEvent: function(evt){
- //summary: HTML5 document messaging endpoint. Unpack the event to see
- //if we want to use it.
- if(evt.uri.split("#")[0] == this.fullXipClientUrl){
- this.fragmentReceived(evt.data);
- }
- },
-
- fragmentReceived: function(frag){
- var index = frag.indexOf("#");
- var stateId = frag.substring(0, index);
- var encodedData = frag.substring(index + 1, frag.length);
-
- var msg = this.unpackMessage(encodedData);
- var state = this._state[stateId];
-
- switch(msg.command){
- case "loaded":
- this.frameLoaded(stateId);
- break;
- case "ok":
- this.sendRequestPart(stateId);
- break;
- case "start":
- state.responseMessage = "" + msg.message;
- this.setServerUrl(stateId, "ok");
- break;
- case "part":
- state.responseMessage += msg.message;
- this.setServerUrl(stateId, "ok");
- break;
- case "end":
- this.setServerUrl(stateId, "ok");
- state.responseMessage += msg.message;
- this.receive(stateId, state.responseMessage);
- break;
- }
- },
-
- unpackMessage: function(encodedMessage){
- var parts = encodedMessage.split(":");
- var command = parts[1];
- encodedMessage = parts[2] || "";
-
- var config = null;
- if(command == "init"){
- var configParts = encodedMessage.split("&");
- config = {};
- for(var i = 0; i < configParts.length; i++){
- var nameValue = configParts[i].split("=");
- config[decodeURIComponent(nameValue[0])] = decodeURIComponent(nameValue[1]);
- }
- }
- return {command: command, message: encodedMessage, config: config};
- }
-}
-
-//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];
- }
- }
- }
- }
-});
-
-}
projects / eow / blobdiff