jQuery Ajax未完成

Question

I'm having a trouble with ajax requests and server responses:

$.ajax({
    url: servurl,
    dataType: "jsonp",
    data: {... },
    crossDomain: true,
    error: function(){},
    success: function(){},
    complete: function(){alert('complete')}
});
}

The thing is - sometimes I get succes, when I should get it, but sometimes I can get 500 status, and it is normal and expected. The same ajax call works for correct requests, but fails for others. I want to display an error message if I get a 500 server error, but for some reason the ajax does not complete. Thus, neither error: nor complete: work. Maybe the reason for that is 'jsonp' datatype? Other datatypes do not work though. Can someone help please?

Or maybe give me an advice on how to detect server status any other way.

Answer 1

Make sure that you are accessing to your server. Maybe you are requesting in your server for an specific contentType (like application/json) and you are not using that property into your ajax call.

As you requested, to show any message if get a error (400, 404, 500...), you can use my custom function for ajax error responses:

function onErrorFunc(jqXHR, status, errorText) {
    alert('Status code: ' + jqXHR.status + '
Status text: ' + status +
    '
Error thrown: ' + errorText);
}

Usage:

$.ajax({
    //some options
    error: onErrorFunc
});

Please, show us what error thrown your server.