mirror of
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122 lines
3.9 KiB
Text
122 lines
3.9 KiB
Text
/*
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Copyright 2018 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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import {assert} from 'workbox-core/_private/assert.js';
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import {logger} from 'workbox-core/_private/logger.js';
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import {timeout} from 'workbox-core/_private/timeout.js';
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import {WorkboxError} from 'workbox-core/_private/WorkboxError.js';
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import {Strategy, StrategyOptions} from './Strategy.js';
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import {StrategyHandler} from './StrategyHandler.js';
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import {messages} from './utils/messages.js';
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import './_version.js';
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interface NetworkOnlyOptions
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extends Omit<StrategyOptions, 'cacheName' | 'matchOptions'> {
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networkTimeoutSeconds?: number;
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}
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/**
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* An implementation of a
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* [network-only](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#network-only)
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* request strategy.
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*
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* This class is useful if you want to take advantage of any
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* [Workbox plugins](https://developer.chrome.com/docs/workbox/using-plugins/).
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*
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* If the network request fails, this will throw a `WorkboxError` exception.
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*
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* @extends workbox-strategies.Strategy
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* @memberof workbox-strategies
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*/
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class NetworkOnly extends Strategy {
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private readonly _networkTimeoutSeconds: number;
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/**
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* @param {Object} [options]
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* @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
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* to use in conjunction with this caching strategy.
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* @param {Object} [options.fetchOptions] Values passed along to the
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* [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
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* of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)
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* `fetch()` requests made by this strategy.
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* @param {number} [options.networkTimeoutSeconds] If set, any network requests
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* that fail to respond within the timeout will result in a network error.
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*/
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constructor(options: NetworkOnlyOptions = {}) {
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super(options);
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this._networkTimeoutSeconds = options.networkTimeoutSeconds || 0;
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}
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/**
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* @private
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* @param {Request|string} request A request to run this strategy for.
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* @param {workbox-strategies.StrategyHandler} handler The event that
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* triggered the request.
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* @return {Promise<Response>}
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*/
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async _handle(request: Request, handler: StrategyHandler): Promise<Response> {
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if (process.env.NODE_ENV !== 'production') {
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assert!.isInstance(request, Request, {
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moduleName: 'workbox-strategies',
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className: this.constructor.name,
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funcName: '_handle',
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paramName: 'request',
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});
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}
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let error: Error | undefined = undefined;
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let response: Response | undefined;
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try {
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const promises: Promise<Response | undefined>[] = [
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handler.fetch(request),
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];
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if (this._networkTimeoutSeconds) {
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const timeoutPromise = timeout(
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this._networkTimeoutSeconds * 1000,
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) as Promise<undefined>;
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promises.push(timeoutPromise);
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}
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response = await Promise.race(promises);
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if (!response) {
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throw new Error(
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`Timed out the network response after ` +
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`${this._networkTimeoutSeconds} seconds.`,
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);
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}
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} catch (err) {
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if (err instanceof Error) {
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error = err;
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}
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}
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if (process.env.NODE_ENV !== 'production') {
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logger.groupCollapsed(
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messages.strategyStart(this.constructor.name, request),
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);
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if (response) {
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logger.log(`Got response from network.`);
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} else {
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logger.log(`Unable to get a response from the network.`);
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}
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messages.printFinalResponse(response);
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logger.groupEnd();
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}
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if (!response) {
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throw new WorkboxError('no-response', {url: request.url, error});
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}
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return response;
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}
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}
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export {NetworkOnly, NetworkOnlyOptions};
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