tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

main-frame-navigation.html (2886B)

      1 <!DOCTYPE html>
      2 <script src="/common/utils.js"></script>
      3 <script src="/resources/testharness.js"></script>
      4 <script src="/resources/testharnessreport.js"></script>
      5 <script src="/speculation-rules/prerender/resources/utils.js"></script>
      6 <script src="/speculation-rules/prerender/resources/deferred-promise-utils.js"></script>
      7 <script>
      8 
      9 // The main test page loads the initiator page, then the initiator page will
     10 // prerender itself with the `prerendering` parameter. The prerendered page will
     11 // trigger a main frame navigation with the `navigation` parameter.
     12 const params = new URLSearchParams(location.search);
     13 const uid = params.get('uid');
     14 
     15 const isPrerendering = params.has('prerendering');
     16 const isNavigation = params.has('navigation');
     17 
     18 if (isPrerendering && isNavigation) {
     19  assert_true(document.prerendering);
     20 
     21  const result = {
     22    // Check the value of document.prerendering now and after activation.
     23    prerenderingValueBeforeActivation: document.prerendering,
     24    prerenderingValueAfterActivation: null,
     25 
     26    // True if the prerenderingchange event is fired.
     27    onprerenderingchangeCalled: false,
     28  };
     29 
     30  window.addEventListener('load', () => {
     31    const prerenderChannel = new PrerenderChannel('prerender-channel', uid);
     32    prerenderChannel.postMessage('readyToActivate');
     33    prerenderChannel.close();
     34  });
     35 
     36  document.addEventListener('prerenderingchange', (e) => {
     37    assert_false(document.prerendering);
     38 
     39    const entry = performance.getEntriesByType('navigation')[0];
     40    assert_greater_than_equal(entry.activationStart, 0,
     41      'activationStart must be greater than 0')
     42 
     43    result.onprerenderingchangeCalled = true;
     44    result.prerenderingValueAfterActivation = document.prerendering;
     45 
     46    const resultChannel = new PrerenderChannel('result', uid);
     47    resultChannel.postMessage(result);
     48    resultChannel.close();
     49    window.close();
     50  });
     51 } else if (isPrerendering) {
     52  assert_true(document.prerendering);
     53 
     54  location.href = location.href + '&navigation';
     55 } else {
     56  assert_false(document.prerendering);
     57 
     58  const prerenderingUrl = location.href + '&prerendering';
     59 
     60  const prerenderChannel = new PrerenderChannel('prerender-channel', uid);
     61  const readyToActivate = new Promise((resolve, reject) => {
     62    prerenderChannel.addEventListener('message', e => {
     63      if (e.data === 'readyToActivate') {
     64        resolve();
     65      } else {
     66        reject(`The initiator page receives an unsupported message: ${e.data}`);
     67      }
     68    });
     69  });
     70 
     71  // Activate the page when prerendering is ready.
     72  readyToActivate.then(() => {
     73    window.location = prerenderingUrl.toString();
     74  }).catch(e => {
     75    const resultChannel = new PrerenderChannel('result', uid);
     76    resultChannel.postMessage(
     77        `Failed to navigate the prerendered page: ${e.toString()}`);
     78    resultChannel.close();
     79    window.close();
     80  });
     81 
     82  startPrerendering(prerenderingUrl);
     83 }
     84 </script>