XMLHttpRequest return status as 0

sourish_khan · June 23, 2010

Hi Ajax Experts!

I'm posed with a different kind of issue using XMLHttpRequest.

I have an html page with a javascript is hooked on with "onload" event. A javascript method "post_to_url()" is invoked on page load.

My code goes as follows...

<html>
<head>
<script type="text/javascript">
function post_to_url() { 
//var poststr = "j_user=" + escape(encodeURI(username)) +"&j_password=" + escape(encodeURI(document.getElementById("j_password").value));
//var poststr = "j_user=" + escape(encodeURIComponent("tester")) +"&j_password=" + escape(encodeURIComponent("password"));
var poststr = "j_user=tester&j_password=password";
postRequestToEP('http://myportalserver.com:50000/irj/portal', poststr);
} 

function postRequestToEP(url, parameters) {
      http_request = false;
      if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
		   http_request = new ActiveXObject("Microsoft.XMLHTTP");  //IE5, IE6
            } catch (e) {
			http_request = false;
		}
         }
      } 
  
  if (!http_request && window.XMLHttpRequest) { // Mozilla, Safari,...
         try {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
         		       // set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	 } catch(e) {
		http_request = false;
	 }
      } 
    if (!http_request) {
       alert("Cannot create XMLHTTP instance");
       return false;
    }
    http_request.onreadystatechange = WPSLogin;
    //http_request.open("GET", url+"?"+parameters, true);
http_request.open("POST", url, true);
    http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    http_request.setRequestHeader("Content-length", parameters.length);
http_request.setRequestHeader("Connection", "close");
http_request.send(parameters);
//http_request.send();
}

function WPSLogin() {
if (http_request.readyState == 4) {
	if (http_request.status == 200) {
                    alert('Successfully logged in to Portal Server!');
                } else {
                   alert('Problem in login to Portal Server!');
                }
}
}
</script>
</head>
<body onload='post_to_url()'>
Test
</body>
</html>

The code executes fine on Internet Explorer 8. But on Firefox/IE6/IE7, I am getting the value of http_request.status = 0, though there is no issue in connecting to the server. Please refer to attached image for clarity.

Upon a bit of googling, I found out that this can occur in case the sites are hosted in different domain due to "Same Domain Policy". But I guess, this is not relevant in my case.

Can anyone please help me out figuring out the issue in my code. Look forward to all your valuable inputs.

Best regards,

Sourish

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XMLHttpRequest return status as 0

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