Status of the request callback 'textStatus'

Question

The below code works fine but the only problem is not giving me the textStatus. What do I need to do in order to get textStatus?

 var url = "http://host/MyServiceImpl.svc/GetCount?method=?";
        $.ajax({  
            dataType: 'jsonp',
            data: { Id: '1' },  
            jsonp: 'jsonp_callback',  
            url: url,  
            success: function (json, textStatus) {
                alert(json.d);
                alert(textStatus);
            },
            error: function (XMLHttpRequest, textStatus, errorThrown) {
                debugger
            }
        });

or

$.getJSON(url, { Id: '1'},
  function (data, textStatus) {
         alert(textStatus);
});

There isn't much offered for debugging, but the [jquery.jsonp plug-in](http://code.google.com/p/jquery-jsonp/) does offer `textStatus` ("error"/"success") on success, error, and complete for jsonp calls: [related SO question](http://stackoverflow.com/questions/1002367/jquery-ajax-jsonp-ignores-a-timeout-and-doesnt-fire-the-error-event). Note: `textStatus` is the second param on most of these handler functions. — patridge, Sep 19 '11 at 18:26

score 1 · Accepted Answer · answered Nov 23 '10 at 17:14

JsonP works by writing a tag to your document with the target Url as source. THe server then wraps it response in a function call.

somecallback( your data )

The drawback of this is that XMLHttpRequest is not used and therefore is no "real" errordetection for jsonP. So basically it will not work because jsonP is a hack in itself.

That said there is a simple workaround that covers most cases where you need to signal a failure. Let the returned json have a .Success property and possibly a .ErrorMessage. I usually use a object of this structure:

{ Success: true|false, ErrorMessage: "", Data:json}

ofcourse 404's or 500's will still cause a problem but the key is to try to avoid those when serving jsonP.

can you please show me sample where exactly you will have the above code? — Nick Kahn, Nov 24 '10 at 01:56
i havent implement the above solution but just closing for the sake of closing. — Nick Kahn, Jul 25 '11 at 16:12

Status of the request callback 'textStatus'

1 Answers1