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

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 }}'}

Because you did not post the csrfmiddlewaretoken, so Django forbid you. this document can help you.

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!");
    }

})