| // Copyright 2022 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| const interceptedBody = 'window.activeServiceWorker.postMessage("script-intercepted");'; |
| let shouldIntercept = false; |
| |
| const postMessage = message => { |
| const options = { |
| includeUncontrolled: false, type: 'window' |
| }; |
| self.clients.matchAll(options).then(clients => { |
| clients.forEach(c => { |
| c.postMessage(message); |
| }); |
| }); |
| }; |
| |
| self.addEventListener("install", event => { |
| self.skipWaiting(); |
| }); |
| |
| self.addEventListener('activate', event => { |
| self.clients.claim(); |
| }); |
| |
| let fetchEventCount = 0; |
| let expectScriptIntercepted = false; |
| |
| self.addEventListener('message', event => { |
| if (event.data === 'start-test') { |
| shouldIntercept = true; |
| postMessage({test: 'check-fetch-intercepted'}); |
| return; |
| } |
| if (event.data.test === 'check-fetch-intercepted') { |
| if (interceptedBody !== event.data.result) { |
| postMessage({test: 'check-fetch-intercepted', result: 'failed'}); |
| return; |
| } |
| shouldIntercept = false; |
| postMessage({test: 'check-fetch-not-intercepted'}); |
| return; |
| } |
| if (event.data.test === 'check-fetch-not-intercepted') { |
| if (interceptedBody === event.data.result) { |
| postMessage({test: 'check-fetch-not-intercepted', result: 'failed'}); |
| return; |
| } |
| shouldIntercept = true; |
| expectScriptIntercepted = true; |
| postMessage({test: 'check-script-intercepted'}); |
| return; |
| } |
| if (event.data === 'script-intercepted') { |
| if (!expectScriptIntercepted) { |
| postMessage('script-intercepted-unexpected'); |
| } |
| shouldIntercept = false; |
| expectScriptIntercepted = false; |
| postMessage({test: 'check-script-not-intercepted'}) |
| return; |
| } |
| if (event.data === 'script-not-intercepted') { |
| if (expectScriptIntercepted) { |
| postMessage('script-not-intercepted-unexpected'); |
| return; |
| } |
| if (fetchEventCount !== 4) { |
| postMessage('fetch-event-count-incorrect'); |
| return; |
| } |
| postMessage('end-test'); |
| return; |
| } |
| postMessage(`${JSON.stringify(event.data)}-unexpected-message`); |
| }); |
| |
| self.addEventListener('fetch', event => { |
| fetchEventCount++; |
| if (shouldIntercept) { |
| event.respondWith(new Promise(resolve => { |
| setTimeout(() => resolve(new Response(interceptedBody)), 100); |
| })); |
| } |
| }); |