Applying anti forgery tokens globally

AntiForgeryTokenFilter.cs

  public class AntiForgeryTokenFilter : IAuthorizationFilter
  {
      private readonly AcceptVerbsAttribute _verbs;
      public AntiForgeryTokenFilter(HttpVerbs verbs)
      {
          _verbs = new AcceptVerbsAttribute(verbs);
      }
      public void OnAuthorization(AuthorizationContext filterContext)
      {
          if (_verbs.IsValidForRequest(filterContext, null))
          {
              AntiForgery.Validate();
          }   
      }
  }
  

app.js

function setupGlobalCSRFAjax() {
    var csrfToken = { '__RequestVerificationToken': $('input[name="__RequestVerificationToken"]').val() };

    $.ajaxPrefilter(function(options, originalOptions) {
        // do not send data for GET
        if (originalOptions.type === 'GET' || options.type === 'GET') {
            return;
        }
        // we modify data, but alternative option is to add to header
        // and update AntiForgeryTokenFilter to look there instead
        if (typeof (options.data) === "string") {
            options.data = options.data + "&" + $.param(csrfToken);
        } else {
            options.data = $.extend(originalOptions.data, csrfToken);
        }
    });
}