track the URL queried

Author: gbicann

assets/client.js

@@ -272,10 +272,14 @@ function showSpinner(msg) {
   div.appendChild(msgDiv);
 }
 
+let lastQueriedURL = null;
+
 // disable the user interface, initiate an XHR
 function sendQuery(url, followReferral=false, followingReferral=true) {
   freezeUI();
 
+  lastQueriedURL = null;
+
   if (0 == url.indexOf('json://')) {
     // run the callback with a mock XHR
     handleResponse({
@@ -342,6 +346,8 @@ function createErrorNode(error) {
 function handleResponse(xhr, followReferral=false) {
   thawUI();
 
+  lastQueriedURL = xhr.responseURL;
+
   if (404 == xhr.status) {
     handleError('This object does not exist.');