Jquery, No X-Requested-With=XMLHttpRequest in ajax request header?

Question

SOME TIMES there is no X-Requested-With header, sometimes there is.

I checked in firebug and found that, don\'t know why.

So when I use requ

Answer 1

Try this also by including the X-Requested-With as part of the Post values.

var postData = "X-Requested-With=XMLHttpRequest&" + $("#myFormId").serialize();
$.post(
    'http://www.mysite.com/blahblah',
    postData,
    function(data) { /*do whatever*/ },
    'html'
);

That and combine it with jitter's answer. Hope it helps!

EDIT NOTES:

I apologize I don't know what I was thinking. I must have misread the question when I posted.
This question is for Python django framework. Not for ASP.NET MVC.

I posted this answer because of the ASP.NET MVC's behavior based on the following source code.

ASP.NET MVC Source Code

Look at the AjaxRequestExtensions.cs class in the ASP.NET MVC source. http://aspnetwebstack.codeplex.com/SourceControl/changeset/view/60c2f18ed84838b1b3da671536a7a40033e67b0d#src/System.Web.Mvc/AjaxRequestExtensions.cs.

public static class AjaxRequestExtensions
{
  public static bool IsAjaxRequest(this HttpRequestBase request)
  {
      if (request == null)
      {
          throw new ArgumentNullException("request");
      }

      return (request["X-Requested-With"] == "XMLHttpRequest") ||
             ((request.Headers != null) && (request.Headers["X-Requested-With"] == "XMLHttpRequest"));
  }
}

MSDN Documentation on HttpRequestBase.Item Property

HttpRequestBase.Item Property
When overridden in a derived class, gets the specified object from the Cookies, Form, QueryString, or ServerVariables collections.

Therefore, request["X-Requested-With"] will look for that key in all the following places:

• HTTP Form POST values
• HTTP Cookie
• HTTP Request Query String
• and Server Variables.

So, if you include the X-Requested-With=XMLHttpRequest key-value pair as part of the HTTP POST like I am doing in the jQuery AJAX call, ASP.NET MVC will consider the HTTP Request as an AJAX HTTP Request.