how to get error message of failed ajax

Question

I want to consume a webService which I get JSON Data from

    $.ajax({
    type: 'GET',
    contentType: 'application/json',
    dataType: 'JSON-P',
    //the url shows the correct JSON Data when I copy the URL in my browser
    url: 'http://url.com',
    success: function(data){
        console.log(data);
        alert(data);
    },
       error: function(xhr, testStatus, error){console.log("Error occured: "+error+" "+xhr+" "+testStatus)}
})

In Firefox, It calls back with the error function, but I dont know what the problem is, it would be great to know the error message but my approach doesnt work. thanks in advance

edit: In Chrome I get the following error:

Origin null is not allowed by Access-Control-Allow-Origin.

edit: It´s solved, the problem was indeed that json doesnt work cross site, and the data was not "jsonp-conform" (it had to set a function(json data...))arround the json data. This could be done by changing the url at the end "_&jsonp=successCallback. Sorry for bothering you

if you're doing a cross origin call you should use JSON-P instead — Fabrizio Calderan, Jun 05 '12 at 11:56
possible duplicate of [XmlHttpRequest error: Origin null is not allowed by Access-Control-Allow-Origin](http://stackoverflow.com/questions/3595515/xmlhttprequest-error-origin-null-is-not-allowed-by-access-control-allow-origin) — Bergi, Jun 05 '12 at 11:59
I updated the changes in my questions, however the ajax calls still back with the error function — 最白目, Jun 05 '12 at 11:59

score 1 · Accepted Answer · edited Apr 25 '13 at 15:38

1

I think there was a JSON object syntax error. Check your JSON object syntax error with jsonlint.com.

edited Apr 25 '13 at 15:38

Jeromy French

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answered Jun 05 '12 at 12:18

anil shah

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score 0 · Answer 2 · edited May 23 '17 at 12:28

0

Are you getting this error locally?

Try it on a server and if it doesn't work: XmlHttpRequest error: Origin null is not allowed by Access-Control-Allow-Origin

edited May 23 '17 at 12:28

Community

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answered Jun 05 '12 at 11:57

Thomas

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the webservice URL is on a remote server, but yes the error occurs in chrome when I load the file with the file:// protocol – 最白目 Jun 05 '12 at 11:59
@dan AJAX is relevant only when invoked from within a web page hosted on some sort of real server, not as raw file. – Shadow Wizard Says No More War Jun 05 '12 at 11:59

how to get error message of failed ajax

2 Answers2