Can I evaluate the response type of an $.ajax() call in success callback?

Question

I am using jQuery to make an AJAX request to a remote endpoint. That endpoint will return a JSON object if there is a failure and that object will describe the failure. If the

Answer 1

how about using the complete option?

$.ajax({
   ...

   complete : function(xhr, status) {
   // status is either "success" or "error"
   // complete is fired after success or error functions
   // xhr is the xhr object itself

       var header = xhr.getResponseHeader('Content-Type');
   },

   ...
});