workbox-strategies.prod.js.map
62.4 KB
{"version":3,"file":"workbox-strategies.prod.js","sources":["../_version.js","../StrategyHandler.js","../Strategy.js","../plugins/cacheOkAndOpaquePlugin.js","../CacheFirst.js","../CacheOnly.js","../NetworkFirst.js","../NetworkOnly.js","../StaleWhileRevalidate.js"],"sourcesContent":["\"use strict\";\n// @ts-ignore\ntry {\n self['workbox:strategies:6.5.3'] && _();\n}\ncatch (e) { }\n","/*\n Copyright 2020 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { cacheMatchIgnoreParams } from 'workbox-core/_private/cacheMatchIgnoreParams.js';\nimport { Deferred } from 'workbox-core/_private/Deferred.js';\nimport { executeQuotaErrorCallbacks } from 'workbox-core/_private/executeQuotaErrorCallbacks.js';\nimport { getFriendlyURL } from 'workbox-core/_private/getFriendlyURL.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { timeout } from 'workbox-core/_private/timeout.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport './_version.js';\nfunction toRequest(input) {\n return typeof input === 'string' ? new Request(input) : input;\n}\n/**\n * A class created every time a Strategy instance instance calls\n * {@link workbox-strategies.Strategy~handle} or\n * {@link workbox-strategies.Strategy~handleAll} that wraps all fetch and\n * cache actions around plugin callbacks and keeps track of when the strategy\n * is \"done\" (i.e. all added `event.waitUntil()` promises have resolved).\n *\n * @memberof workbox-strategies\n */\nclass StrategyHandler {\n /**\n * Creates a new instance associated with the passed strategy and event\n * that's handling the request.\n *\n * The constructor also initializes the state that will be passed to each of\n * the plugins handling this request.\n *\n * @param {workbox-strategies.Strategy} strategy\n * @param {Object} options\n * @param {Request|string} options.request A request to run this strategy for.\n * @param {ExtendableEvent} options.event The event associated with the\n * request.\n * @param {URL} [options.url]\n * @param {*} [options.params] The return value from the\n * {@link workbox-routing~matchCallback} (if applicable).\n */\n constructor(strategy, options) {\n this._cacheKeys = {};\n /**\n * The request the strategy is performing (passed to the strategy's\n * `handle()` or `handleAll()` method).\n * @name request\n * @instance\n * @type {Request}\n * @memberof workbox-strategies.StrategyHandler\n */\n /**\n * The event associated with this request.\n * @name event\n * @instance\n * @type {ExtendableEvent}\n * @memberof workbox-strategies.StrategyHandler\n */\n /**\n * A `URL` instance of `request.url` (if passed to the strategy's\n * `handle()` or `handleAll()` method).\n * Note: the `url` param will be present if the strategy was invoked\n * from a workbox `Route` object.\n * @name url\n * @instance\n * @type {URL|undefined}\n * @memberof workbox-strategies.StrategyHandler\n */\n /**\n * A `param` value (if passed to the strategy's\n * `handle()` or `handleAll()` method).\n * Note: the `param` param will be present if the strategy was invoked\n * from a workbox `Route` object and the\n * {@link workbox-routing~matchCallback} returned\n * a truthy value (it will be that value).\n * @name params\n * @instance\n * @type {*|undefined}\n * @memberof workbox-strategies.StrategyHandler\n */\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(options.event, ExtendableEvent, {\n moduleName: 'workbox-strategies',\n className: 'StrategyHandler',\n funcName: 'constructor',\n paramName: 'options.event',\n });\n }\n Object.assign(this, options);\n this.event = options.event;\n this._strategy = strategy;\n this._handlerDeferred = new Deferred();\n this._extendLifetimePromises = [];\n // Copy the plugins list (since it's mutable on the strategy),\n // so any mutations don't affect this handler instance.\n this._plugins = [...strategy.plugins];\n this._pluginStateMap = new Map();\n for (const plugin of this._plugins) {\n this._pluginStateMap.set(plugin, {});\n }\n this.event.waitUntil(this._handlerDeferred.promise);\n }\n /**\n * Fetches a given request (and invokes any applicable plugin callback\n * methods) using the `fetchOptions` (for non-navigation requests) and\n * `plugins` defined on the `Strategy` object.\n *\n * The following plugin lifecycle methods are invoked when using this method:\n * - `requestWillFetch()`\n * - `fetchDidSucceed()`\n * - `fetchDidFail()`\n *\n * @param {Request|string} input The URL or request to fetch.\n * @return {Promise<Response>}\n */\n async fetch(input) {\n const { event } = this;\n let request = toRequest(input);\n if (request.mode === 'navigate' &&\n event instanceof FetchEvent &&\n event.preloadResponse) {\n const possiblePreloadResponse = (await event.preloadResponse);\n if (possiblePreloadResponse) {\n if (process.env.NODE_ENV !== 'production') {\n logger.log(`Using a preloaded navigation response for ` +\n `'${getFriendlyURL(request.url)}'`);\n }\n return possiblePreloadResponse;\n }\n }\n // If there is a fetchDidFail plugin, we need to save a clone of the\n // original request before it's either modified by a requestWillFetch\n // plugin or before the original request's body is consumed via fetch().\n const originalRequest = this.hasCallback('fetchDidFail')\n ? request.clone()\n : null;\n try {\n for (const cb of this.iterateCallbacks('requestWillFetch')) {\n request = await cb({ request: request.clone(), event });\n }\n }\n catch (err) {\n if (err instanceof Error) {\n throw new WorkboxError('plugin-error-request-will-fetch', {\n thrownErrorMessage: err.message,\n });\n }\n }\n // The request can be altered by plugins with `requestWillFetch` making\n // the original request (most likely from a `fetch` event) different\n // from the Request we make. Pass both to `fetchDidFail` to aid debugging.\n const pluginFilteredRequest = request.clone();\n try {\n let fetchResponse;\n // See https://github.com/GoogleChrome/workbox/issues/1796\n fetchResponse = await fetch(request, request.mode === 'navigate' ? undefined : this._strategy.fetchOptions);\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Network request for ` +\n `'${getFriendlyURL(request.url)}' returned a response with ` +\n `status '${fetchResponse.status}'.`);\n }\n for (const callback of this.iterateCallbacks('fetchDidSucceed')) {\n fetchResponse = await callback({\n event,\n request: pluginFilteredRequest,\n response: fetchResponse,\n });\n }\n return fetchResponse;\n }\n catch (error) {\n if (process.env.NODE_ENV !== 'production') {\n logger.log(`Network request for ` +\n `'${getFriendlyURL(request.url)}' threw an error.`, error);\n }\n // `originalRequest` will only exist if a `fetchDidFail` callback\n // is being used (see above).\n if (originalRequest) {\n await this.runCallbacks('fetchDidFail', {\n error: error,\n event,\n originalRequest: originalRequest.clone(),\n request: pluginFilteredRequest.clone(),\n });\n }\n throw error;\n }\n }\n /**\n * Calls `this.fetch()` and (in the background) runs `this.cachePut()` on\n * the response generated by `this.fetch()`.\n *\n * The call to `this.cachePut()` automatically invokes `this.waitUntil()`,\n * so you do not have to manually call `waitUntil()` on the event.\n *\n * @param {Request|string} input The request or URL to fetch and cache.\n * @return {Promise<Response>}\n */\n async fetchAndCachePut(input) {\n const response = await this.fetch(input);\n const responseClone = response.clone();\n void this.waitUntil(this.cachePut(input, responseClone));\n return response;\n }\n /**\n * Matches a request from the cache (and invokes any applicable plugin\n * callback methods) using the `cacheName`, `matchOptions`, and `plugins`\n * defined on the strategy object.\n *\n * The following plugin lifecycle methods are invoked when using this method:\n * - cacheKeyWillByUsed()\n * - cachedResponseWillByUsed()\n *\n * @param {Request|string} key The Request or URL to use as the cache key.\n * @return {Promise<Response|undefined>} A matching response, if found.\n */\n async cacheMatch(key) {\n const request = toRequest(key);\n let cachedResponse;\n const { cacheName, matchOptions } = this._strategy;\n const effectiveRequest = await this.getCacheKey(request, 'read');\n const multiMatchOptions = Object.assign(Object.assign({}, matchOptions), { cacheName });\n cachedResponse = await caches.match(effectiveRequest, multiMatchOptions);\n if (process.env.NODE_ENV !== 'production') {\n if (cachedResponse) {\n logger.debug(`Found a cached response in '${cacheName}'.`);\n }\n else {\n logger.debug(`No cached response found in '${cacheName}'.`);\n }\n }\n for (const callback of this.iterateCallbacks('cachedResponseWillBeUsed')) {\n cachedResponse =\n (await callback({\n cacheName,\n matchOptions,\n cachedResponse,\n request: effectiveRequest,\n event: this.event,\n })) || undefined;\n }\n return cachedResponse;\n }\n /**\n * Puts a request/response pair in the cache (and invokes any applicable\n * plugin callback methods) using the `cacheName` and `plugins` defined on\n * the strategy object.\n *\n * The following plugin lifecycle methods are invoked when using this method:\n * - cacheKeyWillByUsed()\n * - cacheWillUpdate()\n * - cacheDidUpdate()\n *\n * @param {Request|string} key The request or URL to use as the cache key.\n * @param {Response} response The response to cache.\n * @return {Promise<boolean>} `false` if a cacheWillUpdate caused the response\n * not be cached, and `true` otherwise.\n */\n async cachePut(key, response) {\n const request = toRequest(key);\n // Run in the next task to avoid blocking other cache reads.\n // https://github.com/w3c/ServiceWorker/issues/1397\n await timeout(0);\n const effectiveRequest = await this.getCacheKey(request, 'write');\n if (process.env.NODE_ENV !== 'production') {\n if (effectiveRequest.method && effectiveRequest.method !== 'GET') {\n throw new WorkboxError('attempt-to-cache-non-get-request', {\n url: getFriendlyURL(effectiveRequest.url),\n method: effectiveRequest.method,\n });\n }\n // See https://github.com/GoogleChrome/workbox/issues/2818\n const vary = response.headers.get('Vary');\n if (vary) {\n logger.debug(`The response for ${getFriendlyURL(effectiveRequest.url)} ` +\n `has a 'Vary: ${vary}' header. ` +\n `Consider setting the {ignoreVary: true} option on your strategy ` +\n `to ensure cache matching and deletion works as expected.`);\n }\n }\n if (!response) {\n if (process.env.NODE_ENV !== 'production') {\n logger.error(`Cannot cache non-existent response for ` +\n `'${getFriendlyURL(effectiveRequest.url)}'.`);\n }\n throw new WorkboxError('cache-put-with-no-response', {\n url: getFriendlyURL(effectiveRequest.url),\n });\n }\n const responseToCache = await this._ensureResponseSafeToCache(response);\n if (!responseToCache) {\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Response '${getFriendlyURL(effectiveRequest.url)}' ` +\n `will not be cached.`, responseToCache);\n }\n return false;\n }\n const { cacheName, matchOptions } = this._strategy;\n const cache = await self.caches.open(cacheName);\n const hasCacheUpdateCallback = this.hasCallback('cacheDidUpdate');\n const oldResponse = hasCacheUpdateCallback\n ? await cacheMatchIgnoreParams(\n // TODO(philipwalton): the `__WB_REVISION__` param is a precaching\n // feature. Consider into ways to only add this behavior if using\n // precaching.\n cache, effectiveRequest.clone(), ['__WB_REVISION__'], matchOptions)\n : null;\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Updating the '${cacheName}' cache with a new Response ` +\n `for ${getFriendlyURL(effectiveRequest.url)}.`);\n }\n try {\n await cache.put(effectiveRequest, hasCacheUpdateCallback ? responseToCache.clone() : responseToCache);\n }\n catch (error) {\n if (error instanceof Error) {\n // See https://developer.mozilla.org/en-US/docs/Web/API/DOMException#exception-QuotaExceededError\n if (error.name === 'QuotaExceededError') {\n await executeQuotaErrorCallbacks();\n }\n throw error;\n }\n }\n for (const callback of this.iterateCallbacks('cacheDidUpdate')) {\n await callback({\n cacheName,\n oldResponse,\n newResponse: responseToCache.clone(),\n request: effectiveRequest,\n event: this.event,\n });\n }\n return true;\n }\n /**\n * Checks the list of plugins for the `cacheKeyWillBeUsed` callback, and\n * executes any of those callbacks found in sequence. The final `Request`\n * object returned by the last plugin is treated as the cache key for cache\n * reads and/or writes. If no `cacheKeyWillBeUsed` plugin callbacks have\n * been registered, the passed request is returned unmodified\n *\n * @param {Request} request\n * @param {string} mode\n * @return {Promise<Request>}\n */\n async getCacheKey(request, mode) {\n const key = `${request.url} | ${mode}`;\n if (!this._cacheKeys[key]) {\n let effectiveRequest = request;\n for (const callback of this.iterateCallbacks('cacheKeyWillBeUsed')) {\n effectiveRequest = toRequest(await callback({\n mode,\n request: effectiveRequest,\n event: this.event,\n // params has a type any can't change right now.\n params: this.params, // eslint-disable-line\n }));\n }\n this._cacheKeys[key] = effectiveRequest;\n }\n return this._cacheKeys[key];\n }\n /**\n * Returns true if the strategy has at least one plugin with the given\n * callback.\n *\n * @param {string} name The name of the callback to check for.\n * @return {boolean}\n */\n hasCallback(name) {\n for (const plugin of this._strategy.plugins) {\n if (name in plugin) {\n return true;\n }\n }\n return false;\n }\n /**\n * Runs all plugin callbacks matching the given name, in order, passing the\n * given param object (merged ith the current plugin state) as the only\n * argument.\n *\n * Note: since this method runs all plugins, it's not suitable for cases\n * where the return value of a callback needs to be applied prior to calling\n * the next callback. See\n * {@link workbox-strategies.StrategyHandler#iterateCallbacks}\n * below for how to handle that case.\n *\n * @param {string} name The name of the callback to run within each plugin.\n * @param {Object} param The object to pass as the first (and only) param\n * when executing each callback. This object will be merged with the\n * current plugin state prior to callback execution.\n */\n async runCallbacks(name, param) {\n for (const callback of this.iterateCallbacks(name)) {\n // TODO(philipwalton): not sure why `any` is needed. It seems like\n // this should work with `as WorkboxPluginCallbackParam[C]`.\n await callback(param);\n }\n }\n /**\n * Accepts a callback and returns an iterable of matching plugin callbacks,\n * where each callback is wrapped with the current handler state (i.e. when\n * you call each callback, whatever object parameter you pass it will\n * be merged with the plugin's current state).\n *\n * @param {string} name The name fo the callback to run\n * @return {Array<Function>}\n */\n *iterateCallbacks(name) {\n for (const plugin of this._strategy.plugins) {\n if (typeof plugin[name] === 'function') {\n const state = this._pluginStateMap.get(plugin);\n const statefulCallback = (param) => {\n const statefulParam = Object.assign(Object.assign({}, param), { state });\n // TODO(philipwalton): not sure why `any` is needed. It seems like\n // this should work with `as WorkboxPluginCallbackParam[C]`.\n return plugin[name](statefulParam);\n };\n yield statefulCallback;\n }\n }\n }\n /**\n * Adds a promise to the\n * [extend lifetime promises]{@link https://w3c.github.io/ServiceWorker/#extendableevent-extend-lifetime-promises}\n * of the event event associated with the request being handled (usually a\n * `FetchEvent`).\n *\n * Note: you can await\n * {@link workbox-strategies.StrategyHandler~doneWaiting}\n * to know when all added promises have settled.\n *\n * @param {Promise} promise A promise to add to the extend lifetime promises\n * of the event that triggered the request.\n */\n waitUntil(promise) {\n this._extendLifetimePromises.push(promise);\n return promise;\n }\n /**\n * Returns a promise that resolves once all promises passed to\n * {@link workbox-strategies.StrategyHandler~waitUntil}\n * have settled.\n *\n * Note: any work done after `doneWaiting()` settles should be manually\n * passed to an event's `waitUntil()` method (not this handler's\n * `waitUntil()` method), otherwise the service worker thread my be killed\n * prior to your work completing.\n */\n async doneWaiting() {\n let promise;\n while ((promise = this._extendLifetimePromises.shift())) {\n await promise;\n }\n }\n /**\n * Stops running the strategy and immediately resolves any pending\n * `waitUntil()` promises.\n */\n destroy() {\n this._handlerDeferred.resolve(null);\n }\n /**\n * This method will call cacheWillUpdate on the available plugins (or use\n * status === 200) to determine if the Response is safe and valid to cache.\n *\n * @param {Request} options.request\n * @param {Response} options.response\n * @return {Promise<Response|undefined>}\n *\n * @private\n */\n async _ensureResponseSafeToCache(response) {\n let responseToCache = response;\n let pluginsUsed = false;\n for (const callback of this.iterateCallbacks('cacheWillUpdate')) {\n responseToCache =\n (await callback({\n request: this.request,\n response: responseToCache,\n event: this.event,\n })) || undefined;\n pluginsUsed = true;\n if (!responseToCache) {\n break;\n }\n }\n if (!pluginsUsed) {\n if (responseToCache && responseToCache.status !== 200) {\n responseToCache = undefined;\n }\n if (process.env.NODE_ENV !== 'production') {\n if (responseToCache) {\n if (responseToCache.status !== 200) {\n if (responseToCache.status === 0) {\n logger.warn(`The response for '${this.request.url}' ` +\n `is an opaque response. The caching strategy that you're ` +\n `using will not cache opaque responses by default.`);\n }\n else {\n logger.debug(`The response for '${this.request.url}' ` +\n `returned a status code of '${response.status}' and won't ` +\n `be cached as a result.`);\n }\n }\n }\n }\n }\n return responseToCache;\n }\n}\nexport { StrategyHandler };\n","/*\n Copyright 2020 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { cacheNames } from 'workbox-core/_private/cacheNames.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { getFriendlyURL } from 'workbox-core/_private/getFriendlyURL.js';\nimport { StrategyHandler } from './StrategyHandler.js';\nimport './_version.js';\n/**\n * An abstract base class that all other strategy classes must extend from:\n *\n * @memberof workbox-strategies\n */\nclass Strategy {\n /**\n * Creates a new instance of the strategy and sets all documented option\n * properties as public instance properties.\n *\n * Note: if a custom strategy class extends the base Strategy class and does\n * not need more than these properties, it does not need to define its own\n * constructor.\n *\n * @param {Object} [options]\n * @param {string} [options.cacheName] Cache name to store and retrieve\n * requests. Defaults to the cache names provided by\n * {@link workbox-core.cacheNames}.\n * @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}\n * to use in conjunction with this caching strategy.\n * @param {Object} [options.fetchOptions] Values passed along to the\n * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)\n * of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)\n * `fetch()` requests made by this strategy.\n * @param {Object} [options.matchOptions] The\n * [`CacheQueryOptions`]{@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions}\n * for any `cache.match()` or `cache.put()` calls made by this strategy.\n */\n constructor(options = {}) {\n /**\n * Cache name to store and retrieve\n * requests. Defaults to the cache names provided by\n * {@link workbox-core.cacheNames}.\n *\n * @type {string}\n */\n this.cacheName = cacheNames.getRuntimeName(options.cacheName);\n /**\n * The list\n * [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}\n * used by this strategy.\n *\n * @type {Array<Object>}\n */\n this.plugins = options.plugins || [];\n /**\n * Values passed along to the\n * [`init`]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters}\n * of all fetch() requests made by this strategy.\n *\n * @type {Object}\n */\n this.fetchOptions = options.fetchOptions;\n /**\n * The\n * [`CacheQueryOptions`]{@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions}\n * for any `cache.match()` or `cache.put()` calls made by this strategy.\n *\n * @type {Object}\n */\n this.matchOptions = options.matchOptions;\n }\n /**\n * Perform a request strategy and returns a `Promise` that will resolve with\n * a `Response`, invoking all relevant plugin callbacks.\n *\n * When a strategy instance is registered with a Workbox\n * {@link workbox-routing.Route}, this method is automatically\n * called when the route matches.\n *\n * Alternatively, this method can be used in a standalone `FetchEvent`\n * listener by passing it to `event.respondWith()`.\n *\n * @param {FetchEvent|Object} options A `FetchEvent` or an object with the\n * properties listed below.\n * @param {Request|string} options.request A request to run this strategy for.\n * @param {ExtendableEvent} options.event The event associated with the\n * request.\n * @param {URL} [options.url]\n * @param {*} [options.params]\n */\n handle(options) {\n const [responseDone] = this.handleAll(options);\n return responseDone;\n }\n /**\n * Similar to {@link workbox-strategies.Strategy~handle}, but\n * instead of just returning a `Promise` that resolves to a `Response` it\n * it will return an tuple of `[response, done]` promises, where the former\n * (`response`) is equivalent to what `handle()` returns, and the latter is a\n * Promise that will resolve once any promises that were added to\n * `event.waitUntil()` as part of performing the strategy have completed.\n *\n * You can await the `done` promise to ensure any extra work performed by\n * the strategy (usually caching responses) completes successfully.\n *\n * @param {FetchEvent|Object} options A `FetchEvent` or an object with the\n * properties listed below.\n * @param {Request|string} options.request A request to run this strategy for.\n * @param {ExtendableEvent} options.event The event associated with the\n * request.\n * @param {URL} [options.url]\n * @param {*} [options.params]\n * @return {Array<Promise>} A tuple of [response, done]\n * promises that can be used to determine when the response resolves as\n * well as when the handler has completed all its work.\n */\n handleAll(options) {\n // Allow for flexible options to be passed.\n if (options instanceof FetchEvent) {\n options = {\n event: options,\n request: options.request,\n };\n }\n const event = options.event;\n const request = typeof options.request === 'string'\n ? new Request(options.request)\n : options.request;\n const params = 'params' in options ? options.params : undefined;\n const handler = new StrategyHandler(this, { event, request, params });\n const responseDone = this._getResponse(handler, request, event);\n const handlerDone = this._awaitComplete(responseDone, handler, request, event);\n // Return an array of promises, suitable for use with Promise.all().\n return [responseDone, handlerDone];\n }\n async _getResponse(handler, request, event) {\n await handler.runCallbacks('handlerWillStart', { event, request });\n let response = undefined;\n try {\n response = await this._handle(request, handler);\n // The \"official\" Strategy subclasses all throw this error automatically,\n // but in case a third-party Strategy doesn't, ensure that we have a\n // consistent failure when there's no response or an error response.\n if (!response || response.type === 'error') {\n throw new WorkboxError('no-response', { url: request.url });\n }\n }\n catch (error) {\n if (error instanceof Error) {\n for (const callback of handler.iterateCallbacks('handlerDidError')) {\n response = await callback({ error, event, request });\n if (response) {\n break;\n }\n }\n }\n if (!response) {\n throw error;\n }\n else if (process.env.NODE_ENV !== 'production') {\n logger.log(`While responding to '${getFriendlyURL(request.url)}', ` +\n `an ${error instanceof Error ? error.toString() : ''} error occurred. Using a fallback response provided by ` +\n `a handlerDidError plugin.`);\n }\n }\n for (const callback of handler.iterateCallbacks('handlerWillRespond')) {\n response = await callback({ event, request, response });\n }\n return response;\n }\n async _awaitComplete(responseDone, handler, request, event) {\n let response;\n let error;\n try {\n response = await responseDone;\n }\n catch (error) {\n // Ignore errors, as response errors should be caught via the `response`\n // promise above. The `done` promise will only throw for errors in\n // promises passed to `handler.waitUntil()`.\n }\n try {\n await handler.runCallbacks('handlerDidRespond', {\n event,\n request,\n response,\n });\n await handler.doneWaiting();\n }\n catch (waitUntilError) {\n if (waitUntilError instanceof Error) {\n error = waitUntilError;\n }\n }\n await handler.runCallbacks('handlerDidComplete', {\n event,\n request,\n response,\n error: error,\n });\n handler.destroy();\n if (error) {\n throw error;\n }\n }\n}\nexport { Strategy };\n/**\n * Classes extending the `Strategy` based class should implement this method,\n * and leverage the {@link workbox-strategies.StrategyHandler}\n * arg to perform all fetching and cache logic, which will ensure all relevant\n * cache, cache options, fetch options and plugins are used (per the current\n * strategy instance).\n *\n * @name _handle\n * @instance\n * @abstract\n * @function\n * @param {Request} request\n * @param {workbox-strategies.StrategyHandler} handler\n * @return {Promise<Response>}\n *\n * @memberof workbox-strategies.Strategy\n */\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\nexport const cacheOkAndOpaquePlugin = {\n /**\n * Returns a valid response (to allow caching) if the status is 200 (OK) or\n * 0 (opaque).\n *\n * @param {Object} options\n * @param {Response} options.response\n * @return {Response|null}\n *\n * @private\n */\n cacheWillUpdate: async ({ response }) => {\n if (response.status === 200 || response.status === 0) {\n return response;\n }\n return null;\n },\n};\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { Strategy } from './Strategy.js';\nimport { messages } from './utils/messages.js';\nimport './_version.js';\n/**\n * An implementation of a [cache-first](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#cache-first-falling-back-to-network)\n * request strategy.\n *\n * A cache first strategy is useful for assets that have been revisioned,\n * such as URLs like `/styles/example.a8f5f1.css`, since they\n * can be cached for long periods of time.\n *\n * If the network request fails, and there is no cache match, this will throw\n * a `WorkboxError` exception.\n *\n * @extends workbox-strategies.Strategy\n * @memberof workbox-strategies\n */\nclass CacheFirst extends Strategy {\n /**\n * @private\n * @param {Request|string} request A request to run this strategy for.\n * @param {workbox-strategies.StrategyHandler} handler The event that\n * triggered the request.\n * @return {Promise<Response>}\n */\n async _handle(request, handler) {\n const logs = [];\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(request, Request, {\n moduleName: 'workbox-strategies',\n className: this.constructor.name,\n funcName: 'makeRequest',\n paramName: 'request',\n });\n }\n let response = await handler.cacheMatch(request);\n let error = undefined;\n if (!response) {\n if (process.env.NODE_ENV !== 'production') {\n logs.push(`No response found in the '${this.cacheName}' cache. ` +\n `Will respond with a network request.`);\n }\n try {\n response = await handler.fetchAndCachePut(request);\n }\n catch (err) {\n if (err instanceof Error) {\n error = err;\n }\n }\n if (process.env.NODE_ENV !== 'production') {\n if (response) {\n logs.push(`Got response from network.`);\n }\n else {\n logs.push(`Unable to get a response from the network.`);\n }\n }\n }\n else {\n if (process.env.NODE_ENV !== 'production') {\n logs.push(`Found a cached response in the '${this.cacheName}' cache.`);\n }\n }\n if (process.env.NODE_ENV !== 'production') {\n logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));\n for (const log of logs) {\n logger.log(log);\n }\n messages.printFinalResponse(response);\n logger.groupEnd();\n }\n if (!response) {\n throw new WorkboxError('no-response', { url: request.url, error });\n }\n return response;\n }\n}\nexport { CacheFirst };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { Strategy } from './Strategy.js';\nimport { messages } from './utils/messages.js';\nimport './_version.js';\n/**\n * An implementation of a [cache-only](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#cache-only)\n * request strategy.\n *\n * This class is useful if you want to take advantage of any\n * [Workbox plugins](https://developer.chrome.com/docs/workbox/using-plugins/).\n *\n * If there is no cache match, this will throw a `WorkboxError` exception.\n *\n * @extends workbox-strategies.Strategy\n * @memberof workbox-strategies\n */\nclass CacheOnly extends Strategy {\n /**\n * @private\n * @param {Request|string} request A request to run this strategy for.\n * @param {workbox-strategies.StrategyHandler} handler The event that\n * triggered the request.\n * @return {Promise<Response>}\n */\n async _handle(request, handler) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(request, Request, {\n moduleName: 'workbox-strategies',\n className: this.constructor.name,\n funcName: 'makeRequest',\n paramName: 'request',\n });\n }\n const response = await handler.cacheMatch(request);\n if (process.env.NODE_ENV !== 'production') {\n logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));\n if (response) {\n logger.log(`Found a cached response in the '${this.cacheName}' ` + `cache.`);\n messages.printFinalResponse(response);\n }\n else {\n logger.log(`No response found in the '${this.cacheName}' cache.`);\n }\n logger.groupEnd();\n }\n if (!response) {\n throw new WorkboxError('no-response', { url: request.url });\n }\n return response;\n }\n}\nexport { CacheOnly };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { cacheOkAndOpaquePlugin } from './plugins/cacheOkAndOpaquePlugin.js';\nimport { Strategy } from './Strategy.js';\nimport { messages } from './utils/messages.js';\nimport './_version.js';\n/**\n * An implementation of a\n * [network first](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#network-first-falling-back-to-cache)\n * request strategy.\n *\n * By default, this strategy will cache responses with a 200 status code as\n * well as [opaque responses](https://developer.chrome.com/docs/workbox/caching-resources-during-runtime/#opaque-responses).\n * Opaque responses are are cross-origin requests where the response doesn't\n * support [CORS](https://enable-cors.org/).\n *\n * If the network request fails, and there is no cache match, this will throw\n * a `WorkboxError` exception.\n *\n * @extends workbox-strategies.Strategy\n * @memberof workbox-strategies\n */\nclass NetworkFirst extends Strategy {\n /**\n * @param {Object} [options]\n * @param {string} [options.cacheName] Cache name to store and retrieve\n * requests. Defaults to cache names provided by\n * {@link workbox-core.cacheNames}.\n * @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}\n * to use in conjunction with this caching strategy.\n * @param {Object} [options.fetchOptions] Values passed along to the\n * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)\n * of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)\n * `fetch()` requests made by this strategy.\n * @param {Object} [options.matchOptions] [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)\n * @param {number} [options.networkTimeoutSeconds] If set, any network requests\n * that fail to respond within the timeout will fallback to the cache.\n *\n * This option can be used to combat\n * \"[lie-fi]{@link https://developers.google.com/web/fundamentals/performance/poor-connectivity/#lie-fi}\"\n * scenarios.\n */\n constructor(options = {}) {\n super(options);\n // If this instance contains no plugins with a 'cacheWillUpdate' callback,\n // prepend the `cacheOkAndOpaquePlugin` plugin to the plugins list.\n if (!this.plugins.some((p) => 'cacheWillUpdate' in p)) {\n this.plugins.unshift(cacheOkAndOpaquePlugin);\n }\n this._networkTimeoutSeconds = options.networkTimeoutSeconds || 0;\n if (process.env.NODE_ENV !== 'production') {\n if (this._networkTimeoutSeconds) {\n assert.isType(this._networkTimeoutSeconds, 'number', {\n moduleName: 'workbox-strategies',\n className: this.constructor.name,\n funcName: 'constructor',\n paramName: 'networkTimeoutSeconds',\n });\n }\n }\n }\n /**\n * @private\n * @param {Request|string} request A request to run this strategy for.\n * @param {workbox-strategies.StrategyHandler} handler The event that\n * triggered the request.\n * @return {Promise<Response>}\n */\n async _handle(request, handler) {\n const logs = [];\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(request, Request, {\n moduleName: 'workbox-strategies',\n className: this.constructor.name,\n funcName: 'handle',\n paramName: 'makeRequest',\n });\n }\n const promises = [];\n let timeoutId;\n if (this._networkTimeoutSeconds) {\n const { id, promise } = this._getTimeoutPromise({ request, logs, handler });\n timeoutId = id;\n promises.push(promise);\n }\n const networkPromise = this._getNetworkPromise({\n timeoutId,\n request,\n logs,\n handler,\n });\n promises.push(networkPromise);\n const response = await handler.waitUntil((async () => {\n // Promise.race() will resolve as soon as the first promise resolves.\n return ((await handler.waitUntil(Promise.race(promises))) ||\n // If Promise.race() resolved with null, it might be due to a network\n // timeout + a cache miss. If that were to happen, we'd rather wait until\n // the networkPromise resolves instead of returning null.\n // Note that it's fine to await an already-resolved promise, so we don't\n // have to check to see if it's still \"in flight\".\n (await networkPromise));\n })());\n if (process.env.NODE_ENV !== 'production') {\n logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));\n for (const log of logs) {\n logger.log(log);\n }\n messages.printFinalResponse(response);\n logger.groupEnd();\n }\n if (!response) {\n throw new WorkboxError('no-response', { url: request.url });\n }\n return response;\n }\n /**\n * @param {Object} options\n * @param {Request} options.request\n * @param {Array} options.logs A reference to the logs array\n * @param {Event} options.event\n * @return {Promise<Response>}\n *\n * @private\n */\n _getTimeoutPromise({ request, logs, handler, }) {\n let timeoutId;\n const timeoutPromise = new Promise((resolve) => {\n const onNetworkTimeout = async () => {\n if (process.env.NODE_ENV !== 'production') {\n logs.push(`Timing out the network response at ` +\n `${this._networkTimeoutSeconds} seconds.`);\n }\n resolve(await handler.cacheMatch(request));\n };\n timeoutId = setTimeout(onNetworkTimeout, this._networkTimeoutSeconds * 1000);\n });\n return {\n promise: timeoutPromise,\n id: timeoutId,\n };\n }\n /**\n * @param {Object} options\n * @param {number|undefined} options.timeoutId\n * @param {Request} options.request\n * @param {Array} options.logs A reference to the logs Array.\n * @param {Event} options.event\n * @return {Promise<Response>}\n *\n * @private\n */\n async _getNetworkPromise({ timeoutId, request, logs, handler, }) {\n let error;\n let response;\n try {\n response = await handler.fetchAndCachePut(request);\n }\n catch (fetchError) {\n if (fetchError instanceof Error) {\n error = fetchError;\n }\n }\n if (timeoutId) {\n clearTimeout(timeoutId);\n }\n if (process.env.NODE_ENV !== 'production') {\n if (response) {\n logs.push(`Got response from network.`);\n }\n else {\n logs.push(`Unable to get a response from the network. Will respond ` +\n `with a cached response.`);\n }\n }\n if (error || !response) {\n response = await handler.cacheMatch(request);\n if (process.env.NODE_ENV !== 'production') {\n if (response) {\n logs.push(`Found a cached response in the '${this.cacheName}'` + ` cache.`);\n }\n else {\n logs.push(`No response found in the '${this.cacheName}' cache.`);\n }\n }\n }\n return response;\n }\n}\nexport { NetworkFirst };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { timeout } from 'workbox-core/_private/timeout.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { Strategy } from './Strategy.js';\nimport { messages } from './utils/messages.js';\nimport './_version.js';\n/**\n * An implementation of a\n * [network-only](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#network-only)\n * request strategy.\n *\n * This class is useful if you want to take advantage of any\n * [Workbox plugins](https://developer.chrome.com/docs/workbox/using-plugins/).\n *\n * If the network request fails, this will throw a `WorkboxError` exception.\n *\n * @extends workbox-strategies.Strategy\n * @memberof workbox-strategies\n */\nclass NetworkOnly extends Strategy {\n /**\n * @param {Object} [options]\n * @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}\n * to use in conjunction with this caching strategy.\n * @param {Object} [options.fetchOptions] Values passed along to the\n * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)\n * of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)\n * `fetch()` requests made by this strategy.\n * @param {number} [options.networkTimeoutSeconds] If set, any network requests\n * that fail to respond within the timeout will result in a network error.\n */\n constructor(options = {}) {\n super(options);\n this._networkTimeoutSeconds = options.networkTimeoutSeconds || 0;\n }\n /**\n * @private\n * @param {Request|string} request A request to run this strategy for.\n * @param {workbox-strategies.StrategyHandler} handler The event that\n * triggered the request.\n * @return {Promise<Response>}\n */\n async _handle(request, handler) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(request, Request, {\n moduleName: 'workbox-strategies',\n className: this.constructor.name,\n funcName: '_handle',\n paramName: 'request',\n });\n }\n let error = undefined;\n let response;\n try {\n const promises = [\n handler.fetch(request),\n ];\n if (this._networkTimeoutSeconds) {\n const timeoutPromise = timeout(this._networkTimeoutSeconds * 1000);\n promises.push(timeoutPromise);\n }\n response = await Promise.race(promises);\n if (!response) {\n throw new Error(`Timed out the network response after ` +\n `${this._networkTimeoutSeconds} seconds.`);\n }\n }\n catch (err) {\n if (err instanceof Error) {\n error = err;\n }\n }\n if (process.env.NODE_ENV !== 'production') {\n logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));\n if (response) {\n logger.log(`Got response from network.`);\n }\n else {\n logger.log(`Unable to get a response from the network.`);\n }\n messages.printFinalResponse(response);\n logger.groupEnd();\n }\n if (!response) {\n throw new WorkboxError('no-response', { url: request.url, error });\n }\n return response;\n }\n}\nexport { NetworkOnly };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { cacheOkAndOpaquePlugin } from './plugins/cacheOkAndOpaquePlugin.js';\nimport { Strategy } from './Strategy.js';\nimport { messages } from './utils/messages.js';\nimport './_version.js';\n/**\n * An implementation of a\n * [stale-while-revalidate](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#stale-while-revalidate)\n * request strategy.\n *\n * Resources are requested from both the cache and the network in parallel.\n * The strategy will respond with the cached version if available, otherwise\n * wait for the network response. The cache is updated with the network response\n * with each successful request.\n *\n * By default, this strategy will cache responses with a 200 status code as\n * well as [opaque responses](https://developer.chrome.com/docs/workbox/caching-resources-during-runtime/#opaque-responses).\n * Opaque responses are cross-origin requests where the response doesn't\n * support [CORS](https://enable-cors.org/).\n *\n * If the network request fails, and there is no cache match, this will throw\n * a `WorkboxError` exception.\n *\n * @extends workbox-strategies.Strategy\n * @memberof workbox-strategies\n */\nclass StaleWhileRevalidate extends Strategy {\n /**\n * @param {Object} [options]\n * @param {string} [options.cacheName] Cache name to store and retrieve\n * requests. Defaults to cache names provided by\n * {@link workbox-core.cacheNames}.\n * @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}\n * to use in conjunction with this caching strategy.\n * @param {Object} [options.fetchOptions] Values passed along to the\n * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)\n * of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)\n * `fetch()` requests made by this strategy.\n * @param {Object} [options.matchOptions] [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)\n */\n constructor(options = {}) {\n super(options);\n // If this instance contains no plugins with a 'cacheWillUpdate' callback,\n // prepend the `cacheOkAndOpaquePlugin` plugin to the plugins list.\n if (!this.plugins.some((p) => 'cacheWillUpdate' in p)) {\n this.plugins.unshift(cacheOkAndOpaquePlugin);\n }\n }\n /**\n * @private\n * @param {Request|string} request A request to run this strategy for.\n * @param {workbox-strategies.StrategyHandler} handler The event that\n * triggered the request.\n * @return {Promise<Response>}\n */\n async _handle(request, handler) {\n const logs = [];\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(request, Request, {\n moduleName: 'workbox-strategies',\n className: this.constructor.name,\n funcName: 'handle',\n paramName: 'request',\n });\n }\n const fetchAndCachePromise = handler.fetchAndCachePut(request).catch(() => {\n // Swallow this error because a 'no-response' error will be thrown in\n // main handler return flow. This will be in the `waitUntil()` flow.\n });\n void handler.waitUntil(fetchAndCachePromise);\n let response = await handler.cacheMatch(request);\n let error;\n if (response) {\n if (process.env.NODE_ENV !== 'production') {\n logs.push(`Found a cached response in the '${this.cacheName}'` +\n ` cache. Will update with the network response in the background.`);\n }\n }\n else {\n if (process.env.NODE_ENV !== 'production') {\n logs.push(`No response found in the '${this.cacheName}' cache. ` +\n `Will wait for the network response.`);\n }\n try {\n // NOTE(philipwalton): Really annoying that we have to type cast here.\n // https://github.com/microsoft/TypeScript/issues/20006\n response = (await fetchAndCachePromise);\n }\n catch (err) {\n if (err instanceof Error) {\n error = err;\n }\n }\n }\n if (process.env.NODE_ENV !== 'production') {\n logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));\n for (const log of logs) {\n logger.log(log);\n }\n messages.printFinalResponse(response);\n logger.groupEnd();\n }\n if (!response) {\n throw new WorkboxError('no-response', { url: request.url, error });\n }\n return response;\n }\n}\nexport { StaleWhileRevalidate 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