content/test/data/background_sync/service_worker.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // The "onsync" event currently understands commands (passed as
   6 // registration tags) coming from the test. Any other tag is
   7 // passed through to the document unchanged.
   8 //
   9 // "delay" - Delays finishing the sync event with event.waitUntil.
  10 //           Send a postMessage of "completeDelayedOneShot" to finish the
  11 //           event.
  12 // "unregister" - Unregisters the sync registration from within the sync event.
  13
  14 'use strict';
  15
  16 var resolveCallback = null;
  17 var rejectCallback = null;
  18
  19 this.onmessage = function(event) {
  20   if (event.data === 'completeDelayedOneShot') {
  21     if (resolveCallback === null) {
  22       sendMessageToClients('sync', 'error - resolveCallback is null');
  23       return;
  24     }
  25
  26     resolveCallback();
  27     sendMessageToClients('sync', 'ok - delay completed');
  28     return;
  29   }
  30
  31   if (event.data === 'rejectDelayedOneShot') {
  32     if (rejectCallback === null) {
  33       sendMessageToClients('sync', 'error - rejectCallback is null');
  34       return;
  35     }
  36
  37     rejectCallback();
  38     sendMessageToClients('sync', 'ok - delay rejected');
  39   }
  40 }
  41
  42 this.onsync = function(event) {
  43   var eventProperties = [
  44     // Extract name from toString result: "[object <Class>]"
  45     Object.prototype.toString.call(event).match(/\s([a-zA-Z]+)/)[1],
  46     (typeof event.waitUntil)
  47   ];
  48
  49   if (eventProperties[0] != 'SyncEvent') {
  50     sendMessageToClients('sync', 'error - wrong event type');
  51     return;
  52   }
  53
  54   if (eventProperties[1] != 'function') {
  55     sendMessageToClients('sync', 'error - wrong wait until type');
  56   }
  57
  58   if (event.registration === undefined) {
  59     sendMessageToClients('sync', 'error - event missing registration');
  60     return;
  61   }
  62
  63   if (event.registration.tag === undefined) {
  64     sendMessageToClients('sync', 'error - registration missing tag');
  65     return;
  66   }
  67
  68   var tag = event.registration.tag;
  69
  70   if (tag === 'delay') {
  71     var syncPromise = new Promise(function(resolve, reject) {
  72       resolveCallback = resolve;
  73       rejectCallback = reject;
  74     });
  75     event.waitUntil(syncPromise);
  76     return;
  77   }
  78
  79   if (tag === 'unregister') {
  80     event.waitUntil(event.registration.unregister()
  81       .then(function() {
  82         sendMessageToClients('sync', 'ok - unregister completed');
  83       }));
  84     return;
  85   }
  86
  87   sendMessageToClients('sync', tag + ' fired');
  88 };
  89
  90 function sendMessageToClients(type, data) {
  91   clients.matchAll().then(function(clients) {
  92     clients.forEach(function(client) {
  93       client.postMessage({type, data});
  94     });
  95   }, function(error) {
  96     console.log(error);
  97   });
  98 }