Extract csrfToken and csrfParam to allow external use

Author: monkbroc

src/rails.js

@@ -54,17 +54,25 @@
     // Button onClick disable selector with possible reenable after remote submission
     buttonDisableSelector: 'button[data-remote][data-disable-with], button[data-remote][data-disable]',
 
+    // Up-to-date Cross-Site Request Forgery token
+    csrfToken: function() {
+     return $('meta[name=csrf-token]').attr('content');
+    },
+
+    // URL param that must contain the CSRF token
+    csrfParam: function() {
+     return $('meta[name=csrf-param]').attr('content');
+    },
+
     // Make sure that every Ajax request sends the CSRF token
     CSRFProtection: function(xhr) {
-      var token = $('meta[name="csrf-token"]').attr('content');
+      var token = rails.csrfToken();
       if (token) xhr.setRequestHeader('X-CSRF-Token', token);
     },
 
     // making sure that all forms have actual up-to-date token(cached forms contain old one)
     refreshCSRFTokens: function(){
-      var csrfToken = $('meta[name=csrf-token]').attr('content');
-      var csrfParam = $('meta[name=csrf-param]').attr('content');
-      $('form input[name="' + csrfParam + '"]').val(csrfToken);
+      $('form input[name="' + rails.csrfParam() + '"]').val(rails.csrfToken());
     },
 
     // Triggers an event on an element and returns false if the event result is false