在ajax调用后获取http状态代码

Question

Im trying to get the http status code of my ajax call using the below code but the xhr.status is always undefined..

  function checksession() {
            $.ajax({
                type:'POST'
                ,url:'CheckSession'
                ,success: validateresult(session_ind)
                ,data: { antiCSRF : '{{acsrf}}',
                       session_id: '{{session_id}}'}
                })
        function validateresult(session_ind,xhr){
                alert(xhr.status)
            }

Answer 1

$.ajax({
    //...        
    success: function(data, textStatus, xhr) {
        console.log(xhr.status);
    },
    complete: function(xhr, textStatus) {
        console.log(xhr.status);
    },
    error: function(xhr, textStatus , xhr) {
        console.log(xhr.status);
    }  
});

or use :

statusCode : An object of numeric HTTP codes and functions to be called when the response has the corresponding code. For example, the following will alert when the response status is a 404:

$.ajax({
   statusCode: {
      404: function() {

      }
   }
});

Answer 2

 function checksession() {
        $.ajax({
            type:'POST'
            ,url:'CheckSession'
            ,success: validateresult(session_ind)
            ,data: { antiCSRF : '{{acsrf}}',
                   session_id: '{{session_id}}'}
            success: function(data, textStatus, xhr) {
                console.log(xhr.status);
            },
            complete: function(xhr, textStatus) {
                console.log(xhr.status);
            },
            error: function(xhr, textStatus , xhr) {
                console.log(xhr.status);
            } 
        });
}

Answer 3

Does not appear that xhr (or, jqxhr below) was included as argument to validateresult call , only session_ind

Try

  function checksession() {
            $.ajax({
                type:'POST'
                ,url:'CheckSession'
                ,success: function (session_ind, textStatus, jqxhr) {
                   validateresult(session_ind, textStatus, jqxhr)
                }
                ,data: { antiCSRF : '{{acsrf}}',
                       session_id: '{{session_id}}'}
                });
        function validateresult(session_ind, textStatus, jqxhr){
                alert(jqxhr.status)
            }
  };
checksession();

jsfiddle http://jsfiddle.net/guest271314/nuukyLn0/