Adds support for Django's CSRF protection to jQuery's ajax method

django-csrf.js

// Adds support for Django's CSRF protection to jQuery's ajax method
(function() {
  var cookieRegex = new RegExp('(?:^|;)\\s?' + 'csrftoken' + '=(.*?)(?:;|$)', 'i'),
      match = document.cookie.match(cookieRegex),
      csrftoken = match && decodeURIComponent(match[1]),
      isSafeMethod = function(method) {
        return /^(GET|HEAD|OPTIONS|TRACE)$/.test(method);
      };
  if (csrftoken) {
    jQuery(document).ajaxSend(function(event, jqxhr, settings) {
      if ( ! settings.crossDomain && ! isSafeMethod(settings.type)) {
         jqxhr.setRequestHeader("X-CSRFToken", csrftoken);
      }
    });
  }
})();