Add CSRF token to ajax requests

templates/base.html

@@ -17,6 +17,13 @@
     <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-beta.3/js/bootstrap.min.js"></script>
 
+    <script>
+        $.ajaxSetup({beforeSend: function(xhr, settings){
+                xhr.setRequestHeader('X-CSRFToken',
+                    '{{ csrf_token }}');
+            }});
+    </script>
+
     {{ form.media }}
 
     {% block head %}