/* Copyright 2018 Google LLC Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at https://opensource.org/licenses/MIT. */ import { assert } from 'workbox-core/_private/assert.js'; import { fetchWrapper } from 'workbox-core/_private/fetchWrapper.js'; import { logger } from 'workbox-core/_private/logger.js'; import { WorkboxError } from 'workbox-core/_private/WorkboxError.js'; import { messages } from './utils/messages.js'; import './_version.js'; /** * An implementation of a * [network-only]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#network-only} * request strategy. * * This class is useful if you want to take advantage of any * [Workbox plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}. * * If the network request fails, this will throw a `WorkboxError` exception. * * @memberof module:workbox-strategies */ class NetworkOnly { /** * @param {Object} options * @param {string} options.cacheName Cache name to store and retrieve * requests. Defaults to cache names provided by * [workbox-core]{@link module:workbox-core.cacheNames}. * @param {Array} options.plugins [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins} * to use in conjunction with this caching strategy. * @param {Object} options.fetchOptions Values passed along to the * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters) * of all fetch() requests made by this strategy. */ constructor(options = {}) { this._plugins = options.plugins || []; this._fetchOptions = options.fetchOptions; } /** * This method will perform a request strategy and follows an API that * will work with the * [Workbox Router]{@link module:workbox-routing.Router}. * * @param {Object} options * @param {Request|string} options.request The request to run this strategy for. * @param {Event} [options.event] The event that triggered the request. * @return {Promise} */ async handle({ event, request }) { if (typeof request === 'string') { request = new Request(request); } if (process.env.NODE_ENV !== 'production') { assert.isInstance(request, Request, { moduleName: 'workbox-strategies', className: 'NetworkOnly', funcName: 'handle', paramName: 'request', }); } let error; let response; try { response = await fetchWrapper.fetch({ request, event, fetchOptions: this._fetchOptions, plugins: this._plugins, }); } catch (err) { error = err; } if (process.env.NODE_ENV !== 'production') { logger.groupCollapsed(messages.strategyStart('NetworkOnly', request)); if (response) { logger.log(`Got response from network.`); } else { logger.log(`Unable to get a response from the network.`); } messages.printFinalResponse(response); logger.groupEnd(); } if (!response) { throw new WorkboxError('no-response', { url: request.url, error }); } return response; } } export { NetworkOnly };