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Question

 Chinna Kumar (Chinna)
Mindtree Ltd

Mindtree Ltd
IN
Chinna Member since 2018 11 posts
Mindtree Ltd
Posted: Mar 25, 2018
Last activity: May 2, 2018
Posted: 25 Mar 2018 7:34 EDT
Last activity: 2 May 2018 1:50 EDT
Closed

Unable to post data to server using XMLHttpRequest

Hi Team,

Actually I am trying to hit the server to post data(XML) from PEGA using XMLHttpRequest but I am getting the Http Status as "0" .Below event listener(onreadystatechange ) is not executing and send is failing with the message: callUrl.launchScreen(): Unexpected error: Failed to execute 'send' on 'XMLHttpRequest': Failed to load "URL".

Code:

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Hi Team,

Actually I am trying to hit the server to post data(XML) from PEGA using XMLHttpRequest but I am getting the Http Status as "0" .Below event listener(onreadystatechange ) is not executing and send is failing with the message: callUrl.launchScreen(): Unexpected error: Failed to execute 'send' on 'XMLHttpRequest': Failed to load "URL".

Code:

function invokeInsertClaim(insertClaimXml)
{
try {
alert("callUrl.launchScreen(): screenInputXML=" + insertClaimXml);
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("POST","url",false);
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState === 4) {
if (xmlhttp.status === 200) {
alert("Done with status: " + xmlhttp.status + " and statusText: " + xmlhttp.statusText);
alert('xmlhttp.responseText: ' + xmlhttp.responseText);
return null;
} else {
var statusText = getErrorMsg(xmlhttp.status, xmlhttp.statusText);
alert(statusText);
return null;
}
}
};
xmlhttp.send(insertClaimXml);
} catch (e) {
alert("callUrl.launchScreen(): Unexpected error: " + e.message);
}

In above code if I make it as true(synchronous) it is executing the event listener(onreadystatechange ) but for false(asynchronous) it is not executing the event listener(onreadystatechange ) and getting exception:

callUrl.launchScreen(): Unexpected error: Failed to execute 'send' on 'XMLHttpRequest': Failed to load "URL".


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Low-Code App Development
Java and Activities
Data Integration

Posted: 6 years ago
Posted: 28 Mar 2018 2:04 EDT
Sudhakar Reddy Yaparla (YSudhakarReddy)
JPMorgan Chase & Company

JPMorgan Chase & Company
US

Hi,

Seems to be you are testing with Chrome causing this issue,  probably because of the specification of the jQuery's ajaxmethod, which says:

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Hi,

Seems to be you are testing with Chrome causing this issue,  probably because of the specification of the jQuery's ajaxmethod, which says:

Cross-domain requests and dataType: "jsonp" requests do not support synchronous operation.

The strange of the situation is that Firefox and Internet Explorer seem to ignore that specification and they both perform the http request and return the XML result.


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