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- /*
- 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 { logger } from 'workbox-core/_private/logger.js';
- import { WorkboxError } from 'workbox-core/_private/WorkboxError.js';
- import { Strategy } from './Strategy.js';
- import { messages } from './utils/messages.js';
- import './_version.js';
- /**
- * An implementation of a [cache-only](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#cache-only)
- * request strategy.
- *
- * This class is useful if you want to take advantage of any
- * [Workbox plugins](https://developer.chrome.com/docs/workbox/using-plugins/).
- *
- * If there is no cache match, this will throw a `WorkboxError` exception.
- *
- * @extends workbox-strategies.Strategy
- * @memberof workbox-strategies
- */
- class CacheOnly extends Strategy {
- /**
- * @private
- * @param {Request|string} request A request to run this strategy for.
- * @param {workbox-strategies.StrategyHandler} handler The event that
- * triggered the request.
- * @return {Promise<Response>}
- */
- async _handle(request, handler) {
- if (process.env.NODE_ENV !== 'production') {
- assert.isInstance(request, Request, {
- moduleName: 'workbox-strategies',
- className: this.constructor.name,
- funcName: 'makeRequest',
- paramName: 'request',
- });
- }
- const response = await handler.cacheMatch(request);
- if (process.env.NODE_ENV !== 'production') {
- logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
- if (response) {
- logger.log(`Found a cached response in the '${this.cacheName}' ` + `cache.`);
- messages.printFinalResponse(response);
- }
- else {
- logger.log(`No response found in the '${this.cacheName}' cache.`);
- }
- logger.groupEnd();
- }
- if (!response) {
- throw new WorkboxError('no-response', { url: request.url });
- }
- return response;
- }
- }
- export { CacheOnly };
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