Handling request message in Ajax HTTP Status Code

Question

I have a request in Ajax that consults payments on a third party server, I would like to know how to handle HTTP errors. Example: 'server responded with a status of 404 (Not Found)' This error can happen for several reasons, however it only appears in the log, I would like to treat and shows in an elegant way to the user.

 $.ajax(settings).done(function (response) {
                console.log(response);
                _RecurrentPaymentId = response.Payment.RecurrentPayment.RecurrentPaymentId;
                _NextRecurrency = response.Payment.RecurrentPayment.NextRecurrency;
                _Status = response.Payment.Status;
   });   

Answer 1

You can use the function fail request via AJAX, in your case at jQuery.

It would look something like this:

 $.ajax(settings).done(function (response) {
                console.log(response);
                _RecurrentPaymentId = response.Payment.RecurrentPayment.RecurrentPaymentId;
                _NextRecurrency = response.Payment.RecurrentPayment.NextRecurrency;
                _Status = response.Payment.Status;
}).fail(function() {
    alert( "erro" );
});   

Within the function fail you can define what you want done if the request is unsuccessful.

You can also use the parameter statusCode in the settings of AJAX, in which case I have no way of knowing how they are, because you have assigned the variable "Settings". But you can add the parameter statusCode for a certain HTTP return within its Settings variable:

$.ajax({
  statusCode: {
    404: function() {
      alert("página não encontrada");
    }
  }
});

You can set an action for each type of HTTP return.

Official AJAX documentation at jQuery: http://api.jquery.com/jquery.ajax/