angular-cn/packages/service-worker/worker/testing/cache.ts

195 lines
5.6 KiB
TypeScript

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {MockRequest, MockResponse} from './fetch';
export interface DehydratedResponse {
body: string|null;
status: number;
statusText: string;
headers: {[name: string]: string};
}
export type DehydratedCache = {
[url: string]: DehydratedResponse
};
export type DehydratedCacheStorage = {
[name: string]: DehydratedCache
};
export class MockCacheStorage implements CacheStorage {
private caches = new Map<string, MockCache>();
constructor(private origin: string, hydrateFrom?: string) {
if (hydrateFrom !== undefined) {
const hydrated = JSON.parse(hydrateFrom) as DehydratedCacheStorage;
Object.keys(hydrated).forEach(name => {
this.caches.set(name, new MockCache(this.origin, hydrated[name]));
});
}
}
async has(name: string): Promise<boolean> {
return this.caches.has(name);
}
async keys(): Promise<string[]> {
return Array.from(this.caches.keys());
}
async open(name: string): Promise<Cache> {
if (!this.caches.has(name)) {
this.caches.set(name, new MockCache(this.origin));
}
return this.caches.get(name) as any;
}
async match(req: Request): Promise<Response|undefined> {
return await Array.from(this.caches.values())
.reduce<Promise<Response|undefined>>(async(answer, cache): Promise<Response|undefined> => {
const curr = await answer;
if (curr !== undefined) {
return curr;
}
return cache.match(req);
}, Promise.resolve<Response|undefined>(undefined));
}
async 'delete'(name: string): Promise<boolean> {
if (this.caches.has(name)) {
this.caches.delete(name);
return true;
}
return false;
}
dehydrate(): string {
const dehydrated: DehydratedCacheStorage = {};
Array.from(this.caches.keys()).forEach(name => {
const cache = this.caches.get(name)!;
dehydrated[name] = cache.dehydrate();
});
return JSON.stringify(dehydrated);
}
}
export class MockCache {
private cache = new Map<string, Response>();
constructor(private origin: string, hydrated?: DehydratedCache) {
if (hydrated !== undefined) {
Object.keys(hydrated).forEach(url => {
const resp = hydrated[url];
this.cache.set(
url,
new MockResponse(
resp.body,
{status: resp.status, statusText: resp.statusText, headers: resp.headers}));
});
}
}
async add(request: RequestInfo): Promise<void> {
throw 'Not implemented';
}
async addAll(requests: RequestInfo[]): Promise<void> {
throw 'Not implemented';
}
async 'delete'(request: RequestInfo): Promise<boolean> {
const url = (typeof request === 'string' ? request : request.url);
if (this.cache.has(url)) {
this.cache.delete(url);
return true;
}
return false;
}
async keys(match?: Request|string): Promise<string[]> {
if (match !== undefined) {
throw 'Not implemented';
}
return Array.from(this.cache.keys());
}
async match(request: RequestInfo, options?: CacheQueryOptions): Promise<Response> {
let url = (typeof request === 'string' ? request : request.url);
if (url.startsWith(this.origin)) {
url = '/' + url.substr(this.origin.length);
}
// TODO: cleanup typings. Typescript doesn't know this can resolve to undefined.
let res = this.cache.get(url);
if (res !== undefined) {
res = res.clone();
}
return res!;
}
async matchAll(request?: Request|string, options?: CacheQueryOptions): Promise<Response[]> {
if (request === undefined) {
return Array.from(this.cache.values());
}
const url = (typeof request === 'string' ? request : request.url);
if (this.cache.has(url)) {
return [this.cache.get(url)!];
} else {
return [];
}
}
async put(request: RequestInfo, response: Response): Promise<void> {
const url = (typeof request === 'string' ? request : request.url);
this.cache.set(url, response.clone());
// Even though the body above is cloned, consume it here because the
// real cache consumes the body.
await response.text();
return;
}
dehydrate(): DehydratedCache {
const dehydrated: DehydratedCache = {};
Array.from(this.cache.keys()).forEach(url => {
const resp = this.cache.get(url) as MockResponse;
const dehydratedResp = {
body: resp._body,
status: resp.status,
statusText: resp.statusText,
headers: {},
} as DehydratedResponse;
resp.headers.forEach((value: string, name: string) => {
dehydratedResp.headers[name] = value;
});
dehydrated[url] = dehydratedResp;
});
return dehydrated;
}
}
// This can be used to simulate a situation (bug?), where the user clears the caches from DevTools,
// while the SW is still running (e.g. serving another tab) and keeps references to the deleted
// caches.
export async function clearAllCaches(caches: CacheStorage): Promise<void> {
const cacheNames = await caches.keys();
const cacheInstances = await Promise.all(cacheNames.map(name => caches.open(name)));
// Delete all cache instances from `CacheStorage`.
await Promise.all(cacheNames.map(name => caches.delete(name)));
// Delete all entries from each cache instance.
await Promise.all(cacheInstances.map(async cache => {
const keys = await cache.keys();
await Promise.all(keys.map(key => cache.delete(key)));
}));
}