http://snippets.dzone.com/posts Mon, 08 Sep 2008 05:22:46 GMT DZone Snippets: XMLHttpRequest code http://snippets.dzone.com/posts/show/5281 Non-IE version: <br /><code> <br /> <br />xhr = new XMLHttpRequest(); <br />xhr.open( <br /> "GET", <br /> "http://foo.com", <br /> true <br /> ); <br />xhr.onreadystatechange=function(){ <br /> if (xhr.readyState==4){ <br /> if (xhr.status==200){ <br /> parseResponse(xhr); <br /> }else{ <br /> //handle the HTTP error... <br /> } <br /> }; <br /> }; <br />xhr.send(null); <br /></code> <br /> <br />// Basic XMLHttprequest (code from http://www.sitepoint.com/article/take-command-ajax) <br /> <br /><code> <br />function makeHttpRequest(url){ <br /> <br /> var http_request = false; <br /> <br /> if (window.XMLHttpRequest) { // Mozilla, Safari,... <br /> <br /> http_request = new XMLHttpRequest(); <br /> <br /> if (http_request.overrideMimeType){ <br /> <br /> http_request.overrideMimeType('text/xml'); <br /> <br /> } <br /> <br /> } <br /> else if (window.ActiveXObject) { // IE <br /> <br /> try{ <br /> <br /> http_request = new ActiveXObject("Msxml2.XMLHTTP"); <br /> <br /> } <br /> catch(e){ <br /> <br /> try{ <br /> <br /> http_request = new ActiveXObject("Microsoft.XMLHTTP"); <br /> <br /> } <br /> catch (e) {} <br /> } <br /> <br /> } <br /> <br /> if (!http_request) { <br /> <br /> alert('Unfortunatelly you browser doesn\'t support this feature.'); <br /> <br /> return false; <br /> <br /> } <br /> http_request.onreadystatechange = function() { <br /> <br /> if (http_request.readyState == 4){ <br /> <br /> if (http_request.status == 200){ <br /> <br /> alert(http_request.responseText); <br /> <br /> } <br /> else{ <br /> <br /> alert('There was a problem with the request.(Code: ' + http_request.status + ')'); <br /> <br /> } <br /> <br /> } <br /> <br /> }; <br /> <br /> http_request.open('GET', url, true); <br /> http_request.send(null); <br />} <br /></code> Tue, 25 Mar 2008 19:46:23 GMT http://snippets.dzone.com/posts/show/5281 Yansky (Yansky) http://snippets.dzone.com/posts/show/4291 <code> <br />if($_SERVER["HTTP_X_REQUESTED_WITH"] == 'XMLHttpRequest') <br />{ <br /> // Called from XMLHttpRequest <br />} <br /></code> Thu, 12 Jul 2007 11:45:42 GMT http://snippets.dzone.com/posts/show/4291 sbnet (Stephane BRUN) http://snippets.dzone.com/posts/show/717 XMLHttpRequest for IE <br /> - support onload event handler <br /> - you can modify "XMLHttpRequest.prototype" for debugging, tracing and AOP style programming. <br /> <br /><code> <br />(function(){ <br />if(typeof ActiveXObject == "function" && typeof XMLHttpRequest == "undefined"){ <br /> XMLHttpRequest = function(){ <br /> var self = this; <br /> var props = "readyState,responseText,responseXML,status,statusText".split(","); <br /> this.readyState = 0; <br /> this.__request__ = new ActiveXObject("Microsoft.XMLHTTP"); <br /> this.__request__.onreadystatechange = function(){ <br /> for(var i=0;i<props.length;i++){ <br /> try{ <br /> self[props[i]] = self.__request__[props[i]] <br /> }catch(e){ <br /> } <br /> } <br /> self.onreadystatechange(); <br /> self.readyState == 4 && self.onload(); <br /> } <br /> this.onreadystatechange = function(){}; <br /> } <br /> var methods = "open,abort,send,setRequestHeader,getResponseHeader,getAllResponseHeaders".split(","); <br /> var make_method = function(name){ <br /> XMLHttpRequest.prototype[name] = function(){ <br /> var params = new Array(arguments.length); <br /> for(var i=0;i<params.length;i++) params[i] = "_"+i; <br /> return Function( <br /> params.join(","), <br /> ["return this.__request__.",name,"(",params.join(","),")"].join("") <br /> ).apply(this,arguments); <br /> } <br /> }; <br /> for(var i=0;i<methods.length;i++) make_method(methods[i]); <br />} <br />})(); <br /></code> <br /> <br />you can trace request.open like this. <br /><code> <br />(function(){ <br />var open_old = XMLHttpRequest.prototype.open; <br />XMLHttpRequest.prototype.open = function(){ <br /> alert("open called!"); <br /> return open_old.apply(this,arguments) <br />} <br />})() <br /></code> Thu, 15 Sep 2005 23:03:40 GMT http://snippets.dzone.com/posts/show/717 ma.la (ma.la) http://snippets.dzone.com/posts/show/204 <code> <br />function loadXMLDoc(url) { <br /> <br /> // branch for native XMLHttpRequest object <br /> if (window.XMLHttpRequest) { <br /> <br /> req = new XMLHttpRequest(); <br /> //function_name is the function to process request <br /> req.onreadystatechange = function_name; <br /> req.open("GET", url, true); <br /> req.send(null); <br /> <br /> // branch for IE/Windows ActiveX version <br /> } else if (window.ActiveXObject) { <br /> <br /> req = new ActiveXObject("Microsoft.XMLHTTP"); <br /> if (req) { <br /> <br /> //function_name is the function to process request <br /> req.onreadystatechange = actualizarLista; <br /> req.open("GET", url, true); <br /> req.send(); <br /> } <br /> } <br />} <br /></code> Thu, 21 Apr 2005 21:57:26 GMT http://snippets.dzone.com/posts/show/204 dirtyaffairs (Dirty Affairs) http://snippets.dzone.com/posts/show/203 <br /><code> <br />if (req.readyState == 4) { <br /> <br /> if (req.status == 200) { <br /> <br /> // ...processing statements go here... <br /> <br /> response = req.responseXML; <br /> <br /> results = response.getElementsByTagName(name); <br /> <br /> } <br />} <br /></code> Thu, 21 Apr 2005 21:54:53 GMT http://snippets.dzone.com/posts/show/203 dirtyaffairs (Dirty Affairs)