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June 4, 2022 06:21
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Remove url event listener
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| 'use strict'; | |
| (function () { | |
| const originalAddEventListener = EventTarget.prototype.addEventListener; | |
| const originalRemoveEventListener = EventTarget.prototype.removeEventListener; | |
| const {hostname, pathname} = self.location | |
| const safeFetchHandlers = new WeakMap(); | |
| let currentOnFetch = null; | |
| const matches = /^\/(apps|a|community|tools)\/[^\/]+/.exec(pathname); | |
| const proxy = matches && matches[0]; | |
| const hostnameRegex = hostname.replace(/\./g, '\\.'); | |
| const ALLOWLIST = [ | |
| // Allow only specific subroutes within a storefront | |
| `^https\:\/\/${hostnameRegex}+\/($|collections|products|pages|cart|search|blogs|account|recommendations)`, | |
| // Allow requests from the app proxy in which the service worker was served | |
| `^https\:\/\/${hostnameRegex}+${proxy}`, | |
| // Allow all 3rd party urls | |
| `^https?\:\/\/(?!${hostnameRegex}).+`, | |
| ]; | |
| function isAllowlisted(url) { | |
| return ALLOWLIST.some((str) => { | |
| const re = new RegExp(str); | |
| return url.match(re) | |
| }) | |
| } | |
| function safeAddEventListener(event, handler, options) { | |
| if (event !== 'fetch') return originalAddEventListener.call(this, event, handler, options); | |
| function safeHandler(event) { | |
| if (!isAllowlisted(event.request.url)) { | |
| return console.debug(`FETCH EVENT BLOCKED: Cannot execute fetch event handler on following request: ${event.request.url}`) | |
| } | |
| return handler.call(this, event); | |
| } | |
| safeFetchHandlers.set(handler, safeHandler); | |
| originalAddEventListener.call(this, event, safeHandler, options); | |
| }; | |
| function safeRemoveEventListener(event, handler) { | |
| if (!safeFetchHandlers.has(handler)) return; | |
| const safeHandler = safeFetchHandlers.get(handler) | |
| safeFetchHandlers.delete(handler); | |
| originalRemoveEventListener.call(this, event, safeHandler); | |
| } | |
| Object.defineProperty(EventTarget.prototype, 'addEventListener', { | |
| ...Object.getOwnPropertyDescriptor(EventTarget.prototype, 'addEventListener'), | |
| value: safeAddEventListener | |
| }); | |
| Object.defineProperty(EventTarget.prototype, 'removeEventListener', { | |
| ...Object.getOwnPropertyDescriptor(EventTarget.prototype, 'removeEventListener'), | |
| value: safeRemoveEventListener | |
| }); | |
| Object.defineProperty(self, 'onfetch', { | |
| ...Object.getOwnPropertyDescriptor(self, 'onfetch'), | |
| get() { return currentOnFetch; }, | |
| set(newOnFetch) { | |
| if (currentOnFetch !== null) { | |
| safeRemoveEventListener.call(self, 'fetch', currentOnFetch); | |
| } | |
| if (typeof newOnFetch === 'function') { | |
| safeAddEventListener.call(self, 'fetch', newOnFetch); | |
| } | |
| currentOnFetch = newOnFetch; | |
| }, | |
| }); | |
| }()); | |
| importScripts('https://static.edgeme.sh/edgemesh-sw.js') |
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