[Django]-403 Forbidden error when making an ajax Post request in Django framework

For the lazy guys:

First download cookie: http://plugins.jquery.com/cookie/

Add it to your html:

<script src="{% static 'designer/js/jquery.cookie.js' %}"></script>

Now you can create a working POST request:

var csrftoken = $.cookie('csrftoken');

function csrfSafeMethod(method) {
    // these HTTP methods do not require CSRF protection
    return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
}

$.ajaxSetup({
    beforeSend: function(xhr, settings) {
        if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
            xhr.setRequestHeader("X-CSRFToken", csrftoken);
        }
    }
});

$.ajax(save_url, {
    type : 'POST',
    contentType : 'application/json',
    data : JSON.stringify(canvas),
    success: function () {
        alert("Saved!");
    }

})

The fastest solution if you are not embedding js into your template is:

Put <script type="text/javascript"> window.CSRF_TOKEN = "{{ csrf_token }}"; </script> before your reference to script.js file in your template, then add csrfmiddlewaretoken into your data dictionary:

$.ajax({
            type: 'POST',
            url: somepathname + "do_it/",
            data: {csrfmiddlewaretoken: window.CSRF_TOKEN},
            success: function() {
                console.log("Success!");
            }
        })

If you do embed your js into the template, it’s as simple as: data: {csrfmiddlewaretoken: '{{ csrf_token }}'}

I find all previous answers on-spot but let’s put things in context.

The 403 forbidden response comes from the CSRF middleware (see Cross Site Request Forgery protection):

By default, a ‘403 Forbidden’ response is sent to the user if an incoming request fails the checks performed by CsrfViewMiddleware.

Many options are available. I would recommend to follow the answer of @fivef in order to make jQuery add the X-CSRFToken header before every AJAX request with $.ajaxSetup.

This answer requires the cookie jQuery plugin. If this is not desirable, another possibility is to add:

function getCookie(name) {
    var cookieValue = null;
    if (document.cookie && document.cookie != '') {
        var cookies = document.cookie.split(';');
        for (var i = 0; i < cookies.length; i++) {
            var cookie = jQuery.trim(cookies[i]);
            // Does this cookie string begin with the name we want?
            if (cookie.substring(0, name.length + 1) == (name + '=')) {
                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                break;
            }
        }
    }
    return cookieValue;
}
var csrftoken = getCookie('csrftoken');

BUT: if the setting CSRF_COOKIE_HTTPONLY is set to True, which often happens as the Security middleware recommends so, then the cookie is not there, even if @ensure_csrf_cookie() is used. In this case {% csrf_token %} must be provided in every form, which produces an output such as <input name="csrfmiddlewaretoken" value="cr6O9...FUXf6" type="hidden">. So the csrfToken variable would simply be obtained with:

var csrftoken = $('input[name="csrfmiddlewaretoken"]').val();

Again $.ajaxSetup would be required of course.

Other options which are available but not recommended are to disable the middleware or the csrf protection for the specific form with @csrf_exempt().

data: {"csrfmiddlewaretoken" : "{{csrf_token}}"}

You see “403 (FORBIDDEN)”, because you don`t send “csrfmiddlewaretoken” parameter.
In template each form has this: {% csrf_token %}.
You should add “csrfmiddlewaretoken” to your ajax data dictionary. My example is sending “product_code” and “csrfmiddlewaretoken” to app “basket” view “remove”:

$(function(){
    $('.card-body').on('click',function(){
        $.ajax({
          type: "post",
          url: "{% url 'basket:remove'%}",
          data: {"product_code": "07316", "csrfmiddlewaretoken" : "{{csrf_token}}" }
        });
    })
});

To set the cookie, use the ensure_csrf_cookie decorator in your view:

from django.views.decorators.csrf import ensure_csrf_cookie

@ensure_csrf_cookie
def hello(request):
    code_here()

Make sure you aren’t caching the page/view that your form is showing up on. It could be caching your CSRF_TOKEN. Happened to me!

Another approach is to add X-CSRFTOKEN header with the “{{ csrf_token }}” value like in the following example:

$.ajax({
            url: "{% url 'register_lowresistancetyres' %}",
            type: "POST",
            headers: {//<==
                        "X-CSRFTOKEN": "{{ csrf_token }}"//<==
                },
            data: $(example_form).serialize(),
            success: function(data) {
                //Success code
            },
            error: function () {
                //Error code
            }
        });

Try including this decorator on your dispatch code

from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_exempt     
@method_decorator(csrf_exempt, name='dispatch')
def dispatch(self, request, *args, **kwargs):
     return super(LessonUploadWorkView,self).dispatch(request,*args,**kwargs)

With SSL/https and with CSRF_COOKIE_HTTPONLY = False, I still don’t have csrftoken in the cookie, either using the getCookie(name) function proposed in django Doc or the jquery.cookie.js proposed by fivef.

Wtower summary is perfect and I thought it would work after removing CSRF_COOKIE_HTTPONLY from settings.py but it does’nt in https!

Why csrftoken is not visible in document.cookie???

Instead of getting

“django_language=fr; csrftoken=rDrGI5cp98MnooPIsygWIF76vuYTkDIt”

I get only

“django_language=fr”

WHY? Like SSL/https removes X-CSRFToken from headers I thought it was due to the proxy header params of Nginx but apparently not… Any idea?

Unlike django doc Notes, it seems impossible to work with csrf_token in cookies with https. The only way to pass csrftoken is through the DOM by using {% csrf_token %} in html and get it in jQuery by using

var csrftoken = $('input[name="csrfmiddlewaretoken"]').val();

It is then possible to pass it to ajax either by header (xhr.setRequestHeader), either by params.

this works for me

template.html

  $.ajax({
    url: "{% url 'XXXXXX' %}",
    type: 'POST',
    data: {modifica: jsonText, "csrfmiddlewaretoken" : "{{csrf_token}}"},
    traditional: true,
    dataType: 'html',
    success: function(result){
       window.location.href = "{% url 'XXX' %}";
        }
});

view.py

def aggiornaAttivitaAssegnate(request):
    if request.is_ajax():
        richiesta = json.loads(request.POST.get('modifica'))

You must change your folder chmod 755 and file(.php ,.html) chmod 644.