devtools/client/netmonitor/test/html_custom-get-page.html

   1 <!-- Any copyright is dedicated to the Public Domain.
   2      http://creativecommons.org/publicdomain/zero/1.0/ -->
   3 <!doctype html>
   4
   5 <html>
   6   <head>
   7     <meta charset="utf-8"/>
   8     <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
   9     <meta http-equiv="Pragma" content="no-cache" />
  10     <meta http-equiv="Expires" content="0" />
  11     <title>Network Monitor test page</title>
  12   </head>
  13
  14   <body>
  15     <p>Performing a custom number of GETs</p>
  16
  17     <script type="text/javascript">
  18       /* exported performRequests hasOfflineEventFired */
  19       "use strict";
  20
  21       function get(address) {
  22         return new Promise(resolve => {
  23           const xhr = new XMLHttpRequest();
  24           xhr.open("GET", address, true);
  25
  26           xhr.onreadystatechange = function() {
  27             if (this.readyState == this.DONE) {
  28               resolve();
  29             }
  30           };
  31           xhr.send(null);
  32         });
  33       }
  34
  35       // Use a count parameter to defeat caching.
  36       let count = 0;
  37
  38       async function performRequests(total, url, timeout = 0) {
  39         if (!total) {
  40           return;
  41         }
  42         await get(url || "request_" + (count++));
  43         setTimeout(performRequests.bind(this, --total, url, timeout), timeout);
  44       }
  45
  46       // For testing the offline mode in the netmonitor
  47       let isOfflineEventFired = false;
  48       window.addEventListener("offline", () => {
  49         isOfflineEventFired = true
  50       }, { once: true });
  51
  52       function hasOfflineEventFired() {
  53         return isOfflineEventFired;
  54       }
  55     </script>
  56   </body>
  57
  58 </html>