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authormensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
committermensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
commite44a7e37b6c7b5961adaffc62b9042b8d442938e (patch)
tree95b67c356e93163467db2451f2b8cce84ed5d582 /includes/js/dojox/io/proxy/xip_server.html
parenta62b9742ee5e28bcec6872d88f50f25b820914f6 (diff)
downloadsemanticscuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.gz
semanticscuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.bz2
New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
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+<!--
+ /*
+ Copyright (c) 2004-2008, 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
+ */
+ Pieces taken from Dojo source to make this file stand-alone
+-->
+<html>
+<head>
+ <title></title>
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta>
+ <script type="text/javascript" src="isAllowed.js"></script>
+ <!--
+ BY DEFAULT THIS FILE DOES NOT WORK SO THAT YOU DON'T ACCIDENTALLY EXPOSE
+ ALL OF YOUR XHR-ENABLED SERVICES ON YOUR SITE.
+
+ In order for this file to work, you need to uncomment the start and end script tags,
+ and you should define a function with the following signature:
+
+ function isAllowedRequest(request){
+ return false;
+ }
+
+ Return true out of the function if you want to allow the cross-domain request.
+
+ DON'T DEFINE THIS FUNCTION IN THIS FILE! Define it in a separate file called isAllowed.js
+ and include it in this page with a script tag that has a src attribute pointing to the file.
+ See the very first script tag in this file for an example. You do not have to place the
+ script file in the same directory as this file, just update the path above if you move it
+ somewhere else.
+
+ Customize the isAllowedRequest function to restrict what types of requests are allowed
+ for this server. The request object has the following properties:
+ - requestHeaders: an object with the request headers that are to be added to
+ the XHR request.
+ - method: the HTTP method (GET, POST, etc...)
+ - uri: The URI for the request.
+ - data: The URL-encoded data for the request. For a GET request, this would
+ be the querystring parameters. For a POST request, it wll be the
+ body data.
+
+ See xip_client.html for more info on the xip fragment identifier protocol.
+ -->
+
+ <!-- Security protection: uncomment the script tag to enable. -->
+ <!-- script type="text/javascript" -->
+ // <!--
+ //Core XHR handling taken from Dojo IO code.
+ dojo = {};
+ dojo.hostenv = {};
+ // These are in order of decreasing likelihood; this will change in time.
+ dojo.hostenv._XMLHTTP_PROGIDS = ['Msxml2.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.4.0'];
+
+ dojo.hostenv.getXmlhttpObject = function(){
+ var http = null;
+ var last_e = null;
+ try{ http = new XMLHttpRequest(); }catch(e){}
+ if(!http){
+ for(var i=0; i<3; ++i){
+ var progid = dojo.hostenv._XMLHTTP_PROGIDS[i];
+ try{
+ http = new ActiveXObject(progid);
+ }catch(e){
+ last_e = e;
+ }
+
+ if(http){
+ dojo.hostenv._XMLHTTP_PROGIDS = [progid]; // so faster next time
+ break;
+ }
+ }
+
+ /*if(http && !http.toString) {
+ http.toString = function() { "[object XMLHttpRequest]"; }
+ }*/
+ }
+
+ if(!http){
+ throw "xip_server.html: XMLHTTP not available: " + last_e;
+ }
+
+ return http;
+ }
+
+ dojo.setHeaders = function(http, headers){
+ if(headers) {
+ for(var header in headers) {
+ var headerValue = headers[header];
+ http.setRequestHeader(header, headerValue);
+ }
+ }
+ }
+
+ //MSIE has the lowest limit for URLs with fragment identifiers,
+ //at around 4K. Choosing a slightly smaller number for good measure.
+ xipUrlLimit = 4000;
+ xipIdCounter = 1;
+
+ function xipServerInit(){
+ xipStateId = "";
+ xipCurrentHash = "";
+ xipRequestMessage = "";
+ xipResponseParts = [];
+ xipPartIndex = 0;
+ }
+
+ function pollHash(){
+ //Can't use location.hash because at least Firefox does a decodeURIComponent on it.
+ var urlParts = window.location.href.split("#");
+ if(urlParts.length == 2){
+ var newHash = urlParts[1];
+ if(newHash != xipCurrentHash){
+ try{
+ messageReceived(newHash);
+ }catch(e){
+ //Make sure to not keep processing the error hash value.
+ xipCurrentHash = newHash;
+ throw e;
+ }
+ xipCurrentHash = newHash;
+ }
+ }
+ }
+
+ function messageReceived(encodedData){
+ var msg = unpackMessage(encodedData);
+
+ switch(msg.command){
+ case "ok":
+ sendResponsePart();
+ break;
+ case "start":
+ xipRequestMessage = "";
+ xipRequestMessage += msg.message;
+ setClientUrl("ok");
+ break;
+ case "part":
+ xipRequestMessage += msg.message;
+ setClientUrl("ok");
+ break;
+ case "end":
+ setClientUrl("ok");
+ xipRequestMessage += msg.message;
+ sendXhr();
+ break;
+ }
+ }
+
+ function sendResponse(encodedData){
+ //Break the message into parts, if necessary.
+ xipResponseParts = [];
+ var resData = encodedData;
+ var urlLength = xipClientUrl.length;
+ var partLength = xipUrlLimit - urlLength;
+ var resIndex = 0;
+
+ while((resData.length - resIndex) + urlLength > xipUrlLimit){
+ var part = resData.substring(resIndex, resIndex + 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);
+ }
+ xipResponseParts.push(part);
+ resIndex += part.length;
+ }
+ xipResponseParts.push(resData.substring(resIndex, resData.length));
+
+ xipPartIndex = 0;
+ sendResponsePart();
+ }
+
+ function sendResponsePart(){
+ if(xipPartIndex < xipResponseParts.length){
+ //Get the message part.
+ var partData = xipResponseParts[xipPartIndex];
+
+ //Get the command.
+ var cmd = "part";
+ if(xipPartIndex + 1 == xipResponseParts.length){
+ cmd = "end";
+ }else if (xipPartIndex == 0){
+ cmd = "start";
+ }
+
+ setClientUrl(cmd, partData);
+ xipPartIndex++;
+ }else{
+ xipServerInit();
+ }
+ }
+
+ function setClientUrl(cmd, message){
+ var clientUrl = makeClientUrl(cmd, message);
+ //Safari won't let us replace across domains.
+ if(navigator.userAgent.indexOf("Safari") == -1){
+ xipClientWindow.location.replace(clientUrl);
+ }else{
+ xipClientWindow.location = clientUrl;
+ }
+ }
+
+ function makeClientUrl(cmd, message){
+ var clientUrl = xipClientUrl + "#" + (xipIdCounter++) + ":" + cmd;
+ if(message){
+ clientUrl += ":" + message;
+ }
+ return clientUrl
+ }
+
+ function xhrDone(xhr){
+ /* Need to pull off and return the following data:
+ - responseHeaders
+ - status
+ - statusText
+ - responseText
+ */
+ var response = {};
+
+ if(typeof(xhr.getAllResponseHeaders) != "undefined"){
+ var allHeaders = xhr.getAllResponseHeaders();
+ if(allHeaders){
+ response.responseHeaders = allHeaders;
+ }
+ }
+
+ if(xhr.status == 0 || xhr.status){
+ response.status = xhr.status;
+ }
+
+ if(xhr.statusText){
+ response.statusText = xhr.statusText;
+ }
+
+ if(xhr.responseText){
+ response.responseText = xhr.responseText;
+ }
+
+ //Build a string of the response object.
+ var result = "";
+ var isFirst = true;
+ for (var param in response){
+ if(isFirst){
+ isFirst = false;
+ }else{
+ result += "&";
+ }
+ result += param + "=" + encodeURIComponent(response[param]);
+ }
+ sendResponse(result);
+ }
+
+ function sendXhr(){
+ var request = {};
+ var nvPairs = xipRequestMessage.split("&");
+ var i = 0;
+ var nameValue = null;
+ for(i = 0; i < nvPairs.length; i++){
+ if(nvPairs[i]){
+ var nameValue = nvPairs[i].split("=");
+ request[decodeURIComponent(nameValue[0])] = decodeURIComponent(nameValue[1]);
+ }
+ }
+
+ //Split up the request headers, if any.
+ var headers = {};
+ if(request.requestHeaders){
+ nvPairs = request.requestHeaders.split("\r\n");
+ for(i = 0; i < nvPairs.length; i++){
+ if(nvPairs[i]){
+ nameValue = nvPairs[i].split(": ");
+ headers[decodeURIComponent(nameValue[0])] = decodeURIComponent(nameValue[1]);
+ }
+ }
+
+ request.requestHeaders = headers;
+ }
+
+ if(isAllowedRequest(request)){
+
+ //The request is allowed, so set up the XHR object.
+ var xhr = dojo.hostenv.getXmlhttpObject();
+
+ //Start timer to look for readyState.
+ var xhrIntervalId = setInterval(function(){
+
+ if(xhr.readyState == 4){
+ clearInterval(xhrIntervalId);
+ xhrDone(xhr);
+ }
+ }, 10);
+
+ //Actually start up the XHR request.
+ xhr.open(request.method, request.uri, true);
+ dojo.setHeaders(xhr, request.requestHeaders);
+
+ var content = "";
+ if(request.data){
+ content = request.data;
+ }
+
+ try{
+ xhr.send(content);
+ }catch(e){
+ if(typeof xhr.abort == "function"){
+ xhr.abort();
+ xhrDone({status: 404, statusText: "xip_server.html error: " + e});
+ }
+ }
+ }
+ }
+
+ function unpackMessage(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};
+ }
+
+ function onServerLoad(){
+ xipServerInit();
+
+ //Decode the init params
+ var config = unpackMessage(window.location.href.split("#")[1]).config;
+
+ xipStateId = config.id;
+ xipClientUrl = config.client;
+
+ //Make sure we don't have a javascript: url, just for good measure.
+ if(xipClientUrl.split(":")[0].match(/javascript/i)){
+ throw "Invalid client URL";
+ }
+ if(!xipStateId.match(/^XhrIframeProxy[0-9]+$/)){
+ throw "Invalid state ID";
+ }
+
+ setInterval(pollHash, 10);
+
+ var serverUrl = window.location.href.split("#")[0];
+ document.getElementById("iframeHolder").innerHTML = '<iframe name="'
+ + xipStateId + '_clientEndPoint'
+ + '" src="javascript:false">'
+ + '</iframe>';
+ xipClientWindow = document.getElementsByTagName("iframe")[0];
+ xipClientWindow.src = makeClientUrl("init", 'id=' + xipStateId + "&callback=" + encodeURIComponent(config.callback));
+ if(xipClientWindow.contentWindow){
+ xipClientWindow = xipClientWindow.contentWindow;
+ }
+ }
+
+ if(typeof(window.addEventListener) == "undefined"){
+ window.attachEvent("onload", onServerLoad);
+ }else{
+ window.addEventListener('load', onServerLoad, false);
+ }
+ // -->
+ <!-- </script> -->
+</head>
+<body>
+ <h4>The Dojo Toolkit -- xip_server.html</h4>
+
+ <p>This file is used for Dojo's XMLHttpRequest Iframe Proxy. This is the the file
+ that should go on the server that will actually be doing the XHR request.</p>
+ <div id="iframeHolder"></div>
+</body>
+</html>
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