| 'use strict'; |
| |
| self.onfetch = function(event) { |
| if (event.request.url.indexOf('non-existent-file.txt') !== -1) { |
| event.respondWith(new Response('Response from service worker')); |
| } else if (event.request.url.indexOf('/iframe_page') !== -1) { |
| event.respondWith(new Response( |
| '<!DOCTYPE html>\n' + |
| '<script>\n' + |
| 'function performSyncXHROnWorker(url) {\n' + |
| ' return new Promise((resolve) => {\n' + |
| ' var worker =\n' + |
| ' new Worker(\'./worker_script\');\n' + |
| ' worker.addEventListener(\'message\', (msg) => {\n' + |
| ' resolve(msg.data);\n' + |
| ' });\n' + |
| ' worker.postMessage({\n' + |
| ' url: url\n' + |
| ' });\n' + |
| ' });\n' + |
| '}\n' + |
| '</script>', |
| { |
| headers: [['content-type', 'text/html']] |
| })); |
| } else if (event.request.url.indexOf('/worker_script') !== -1) { |
| event.respondWith(new Response( |
| 'self.onmessage = (msg) => {' + |
| ' const syncXhr = new XMLHttpRequest();' + |
| ' syncXhr.open(\'GET\', msg.data.url, false);' + |
| ' syncXhr.send();' + |
| ' self.postMessage({' + |
| ' status: syncXhr.status,' + |
| ' responseText: syncXhr.responseText' + |
| ' });' + |
| '}', |
| { |
| headers: [['content-type', 'application/javascript']] |
| })); |
| } |
| }; |
