Why is My Django CSRF Check Failing with an Ajax POST Request?

Django CSRF Check Failing with Ajax Post Request

As outlined in Django's documentation, enabling CSRF protection helps prevent malicious cross-site request attacks. By following the instructions, you attempted to implement the CSRF check with Ajax posting but are still encountering rejection.

To troubleshoot this issue, consider the following steps:

1. Verify Token Existence:
   Ensure that the JavaScript code is fetching the CSRF token and storing it in a variable called csrftoken. This token should be present before setting the header:

   $.post("/memorize/", data, function (result) { ... });
   
   var csrftoken = getCookie('csrftoken');
   xhr.setRequestHeader("X-CSRFToken", csrftoken);

2. Ensure Token Use:
   After obtaining the token, explicitly set it in the header for the Ajax request using setRequestHeader.
3. Check Response Body:
   Inspect the response body from Django to see if it explicitly mentions a missing or invalid CSRF token.

4. Alternative Method (Using Data Body):
   Instead of setting the header, you can embed the CSRF token in the data body of the Ajax request as follows:

   $.ajax({
       data: {
           csrfmiddlewaretoken: '{{ csrf_token }}',
           ...  // Other data
       },
   });

5. Enable Debugging:
   Turn on Django's CSRF debugging mode by adding DEBUG = True to the settings. This may provide additional error messages or hints in the response body.

Once these steps have been completed, re-submit the Ajax request to see if the CSRF check passes successfully.

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