define(['exports'], (function (exports) { 'use strict'; // @ts-ignore try { self['workbox:core:7.0.0'] && _(); } catch (e) {} /* Copyright 2019 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. */ const logger = (() => { // Don't overwrite this value if it's already set. // See https://github.com/GoogleChrome/workbox/pull/2284#issuecomment-560470923 if (!('__WB_DISABLE_DEV_LOGS' in globalThis)) { self.__WB_DISABLE_DEV_LOGS = false; } let inGroup = false; const methodToColorMap = { debug: `#7f8c8d`, log: `#2ecc71`, warn: `#f39c12`, error: `#c0392b`, groupCollapsed: `#3498db`, groupEnd: null // No colored prefix on groupEnd }; const print = function (method, args) { if (self.__WB_DISABLE_DEV_LOGS) { return; } if (method === 'groupCollapsed') { // Safari doesn't print all console.groupCollapsed() arguments: // https://bugs.webkit.org/show_bug.cgi?id=182754 if (/^((?!chrome|android).)*safari/i.test(navigator.userAgent)) { console[method](...args); return; } } const styles = [`background: ${methodToColorMap[method]}`, `border-radius: 0.5em`, `color: white`, `font-weight: bold`, `padding: 2px 0.5em`]; // When in a group, the workbox prefix is not displayed. const logPrefix = inGroup ? [] : ['%cworkbox', styles.join(';')]; console[method](...logPrefix, ...args); if (method === 'groupCollapsed') { inGroup = true; } if (method === 'groupEnd') { inGroup = false; } }; // eslint-disable-next-line @typescript-eslint/ban-types const api = {}; const loggerMethods = Object.keys(methodToColorMap); for (const key of loggerMethods) { const method = key; api[method] = (...args) => { print(method, args); }; } return api; })(); /* 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. */ const messages$1 = { 'invalid-value': ({ paramName, validValueDescription, value }) => { if (!paramName || !validValueDescription) { throw new Error(`Unexpected input to 'invalid-value' error.`); } return `The '${paramName}' parameter was given a value with an ` + `unexpected value. ${validValueDescription} Received a value of ` + `${JSON.stringify(value)}.`; }, 'not-an-array': ({ moduleName, className, funcName, paramName }) => { if (!moduleName || !className || !funcName || !paramName) { throw new Error(`Unexpected input to 'not-an-array' error.`); } return `The parameter '${paramName}' passed into ` + `'${moduleName}.${className}.${funcName}()' must be an array.`; }, 'incorrect-type': ({ expectedType, paramName, moduleName, className, funcName }) => { if (!expectedType || !paramName || !moduleName || !funcName) { throw new Error(`Unexpected input to 'incorrect-type' error.`); } const classNameStr = className ? `${className}.` : ''; return `The parameter '${paramName}' passed into ` + `'${moduleName}.${classNameStr}` + `${funcName}()' must be of type ${expectedType}.`; }, 'incorrect-class': ({ expectedClassName, paramName, moduleName, className, funcName, isReturnValueProblem }) => { if (!expectedClassName || !moduleName || !funcName) { throw new Error(`Unexpected input to 'incorrect-class' error.`); } const classNameStr = className ? `${className}.` : ''; if (isReturnValueProblem) { return `The return value from ` + `'${moduleName}.${classNameStr}${funcName}()' ` + `must be an instance of class ${expectedClassName}.`; } return `The parameter '${paramName}' passed into ` + `'${moduleName}.${classNameStr}${funcName}()' ` + `must be an instance of class ${expectedClassName}.`; }, 'missing-a-method': ({ expectedMethod, paramName, moduleName, className, funcName }) => { if (!expectedMethod || !paramName || !moduleName || !className || !funcName) { throw new Error(`Unexpected input to 'missing-a-method' error.`); } return `${moduleName}.${className}.${funcName}() expected the ` + `'${paramName}' parameter to expose a '${expectedMethod}' method.`; }, 'add-to-cache-list-unexpected-type': ({ entry }) => { return `An unexpected entry was passed to ` + `'workbox-precaching.PrecacheController.addToCacheList()' The entry ` + `'${JSON.stringify(entry)}' isn't supported. You must supply an array of ` + `strings with one or more characters, objects with a url property or ` + `Request objects.`; }, 'add-to-cache-list-conflicting-entries': ({ firstEntry, secondEntry }) => { if (!firstEntry || !secondEntry) { throw new Error(`Unexpected input to ` + `'add-to-cache-list-duplicate-entries' error.`); } return `Two of the entries passed to ` + `'workbox-precaching.PrecacheController.addToCacheList()' had the URL ` + `${firstEntry} but different revision details. Workbox is ` + `unable to cache and version the asset correctly. Please remove one ` + `of the entries.`; }, 'plugin-error-request-will-fetch': ({ thrownErrorMessage }) => { if (!thrownErrorMessage) { throw new Error(`Unexpected input to ` + `'plugin-error-request-will-fetch', error.`); } return `An error was thrown by a plugins 'requestWillFetch()' method. ` + `The thrown error message was: '${thrownErrorMessage}'.`; }, 'invalid-cache-name': ({ cacheNameId, value }) => { if (!cacheNameId) { throw new Error(`Expected a 'cacheNameId' for error 'invalid-cache-name'`); } return `You must provide a name containing at least one character for ` + `setCacheDetails({${cacheNameId}: '...'}). Received a value of ` + `'${JSON.stringify(value)}'`; }, 'unregister-route-but-not-found-with-method': ({ method }) => { if (!method) { throw new Error(`Unexpected input to ` + `'unregister-route-but-not-found-with-method' error.`); } return `The route you're trying to unregister was not previously ` + `registered for the method type '${method}'.`; }, 'unregister-route-route-not-registered': () => { return `The route you're trying to unregister was not previously ` + `registered.`; }, 'queue-replay-failed': ({ name }) => { return `Replaying the background sync queue '${name}' failed.`; }, 'duplicate-queue-name': ({ name }) => { return `The Queue name '${name}' is already being used. ` + `All instances of backgroundSync.Queue must be given unique names.`; }, 'expired-test-without-max-age': ({ methodName, paramName }) => { return `The '${methodName}()' method can only be used when the ` + `'${paramName}' is used in the constructor.`; }, 'unsupported-route-type': ({ moduleName, className, funcName, paramName }) => { return `The supplied '${paramName}' parameter was an unsupported type. ` + `Please check the docs for ${moduleName}.${className}.${funcName} for ` + `valid input types.`; }, 'not-array-of-class': ({ value, expectedClass, moduleName, className, funcName, paramName }) => { return `The supplied '${paramName}' parameter must be an array of ` + `'${expectedClass}' objects. Received '${JSON.stringify(value)},'. ` + `Please check the call to ${moduleName}.${className}.${funcName}() ` + `to fix the issue.`; }, 'max-entries-or-age-required': ({ moduleName, className, funcName }) => { return `You must define either config.maxEntries or config.maxAgeSeconds` + `in ${moduleName}.${className}.${funcName}`; }, 'statuses-or-headers-required': ({ moduleName, className, funcName }) => { return `You must define either config.statuses or config.headers` + `in ${moduleName}.${className}.${funcName}`; }, 'invalid-string': ({ moduleName, funcName, paramName }) => { if (!paramName || !moduleName || !funcName) { throw new Error(`Unexpected input to 'invalid-string' error.`); } return `When using strings, the '${paramName}' parameter must start with ` + `'http' (for cross-origin matches) or '/' (for same-origin matches). ` + `Please see the docs for ${moduleName}.${funcName}() for ` + `more info.`; }, 'channel-name-required': () => { return `You must provide a channelName to construct a ` + `BroadcastCacheUpdate instance.`; }, 'invalid-responses-are-same-args': () => { return `The arguments passed into responsesAreSame() appear to be ` + `invalid. Please ensure valid Responses are used.`; }, 'expire-custom-caches-only': () => { return `You must provide a 'cacheName' property when using the ` + `expiration plugin with a runtime caching strategy.`; }, 'unit-must-be-bytes': ({ normalizedRangeHeader }) => { if (!normalizedRangeHeader) { throw new Error(`Unexpected input to 'unit-must-be-bytes' error.`); } return `The 'unit' portion of the Range header must be set to 'bytes'. ` + `The Range header provided was "${normalizedRangeHeader}"`; }, 'single-range-only': ({ normalizedRangeHeader }) => { if (!normalizedRangeHeader) { throw new Error(`Unexpected input to 'single-range-only' error.`); } return `Multiple ranges are not supported. Please use a single start ` + `value, and optional end value. The Range header provided was ` + `"${normalizedRangeHeader}"`; }, 'invalid-range-values': ({ normalizedRangeHeader }) => { if (!normalizedRangeHeader) { throw new Error(`Unexpected input to 'invalid-range-values' error.`); } return `The Range header is missing both start and end values. At least ` + `one of those values is needed. The Range header provided was ` + `"${normalizedRangeHeader}"`; }, 'no-range-header': () => { return `No Range header was found in the Request provided.`; }, 'range-not-satisfiable': ({ size, start, end }) => { return `The start (${start}) and end (${end}) values in the Range are ` + `not satisfiable by the cached response, which is ${size} bytes.`; }, 'attempt-to-cache-non-get-request': ({ url, method }) => { return `Unable to cache '${url}' because it is a '${method}' request and ` + `only 'GET' requests can be cached.`; }, 'cache-put-with-no-response': ({ url }) => { return `There was an attempt to cache '${url}' but the response was not ` + `defined.`; }, 'no-response': ({ url, error }) => { let message = `The strategy could not generate a response for '${url}'.`; if (error) { message += ` The underlying error is ${error}.`; } return message; }, 'bad-precaching-response': ({ url, status }) => { return `The precaching request for '${url}' failed` + (status ? ` with an HTTP status of ${status}.` : `.`); }, 'non-precached-url': ({ url }) => { return `createHandlerBoundToURL('${url}') was called, but that URL is ` + `not precached. Please pass in a URL that is precached instead.`; }, 'add-to-cache-list-conflicting-integrities': ({ url }) => { return `Two of the entries passed to ` + `'workbox-precaching.PrecacheController.addToCacheList()' had the URL ` + `${url} with different integrity values. Please remove one of them.`; }, 'missing-precache-entry': ({ cacheName, url }) => { return `Unable to find a precached response in ${cacheName} for ${url}.`; }, 'cross-origin-copy-response': ({ origin }) => { return `workbox-core.copyResponse() can only be used with same-origin ` + `responses. It was passed a response with origin ${origin}.`; }, 'opaque-streams-source': ({ type }) => { const message = `One of the workbox-streams sources resulted in an ` + `'${type}' response.`; if (type === 'opaqueredirect') { return `${message} Please do not use a navigation request that results ` + `in a redirect as a source.`; } return `${message} Please ensure your sources are CORS-enabled.`; } }; /* 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. */ const generatorFunction = (code, details = {}) => { const message = messages$1[code]; if (!message) { throw new Error(`Unable to find message for code '${code}'.`); } return message(details); }; const messageGenerator = generatorFunction; /* 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. */ /** * Workbox errors should be thrown with this class. * This allows use to ensure the type easily in tests, * helps developers identify errors from workbox * easily and allows use to optimise error * messages correctly. * * @private */ class WorkboxError extends Error { /** * * @param {string} errorCode The error code that * identifies this particular error. * @param {Object=} details Any relevant arguments * that will help developers identify issues should * be added as a key on the context object. */ constructor(errorCode, details) { const message = messageGenerator(errorCode, details); super(message); this.name = errorCode; this.details = details; } } /* 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. */ /* * This method throws if the supplied value is not an array. * The destructed values are required to produce a meaningful error for users. * The destructed and restructured object is so it's clear what is * needed. */ const isArray = (value, details) => { if (!Array.isArray(value)) { throw new WorkboxError('not-an-array', details); } }; const hasMethod = (object, expectedMethod, details) => { const type = typeof object[expectedMethod]; if (type !== 'function') { details['expectedMethod'] = expectedMethod; throw new WorkboxError('missing-a-method', details); } }; const isType = (object, expectedType, details) => { if (typeof object !== expectedType) { details['expectedType'] = expectedType; throw new WorkboxError('incorrect-type', details); } }; const isInstance = (object, // Need the general type to do the check later. // eslint-disable-next-line @typescript-eslint/ban-types expectedClass, details) => { if (!(object instanceof expectedClass)) { details['expectedClassName'] = expectedClass.name; throw new WorkboxError('incorrect-class', details); } }; const isOneOf = (value, validValues, details) => { if (!validValues.includes(value)) { details['validValueDescription'] = `Valid values are ${JSON.stringify(validValues)}.`; throw new WorkboxError('invalid-value', details); } }; const isArrayOfClass = (value, // Need general type to do check later. expectedClass, // eslint-disable-line details) => { const error = new WorkboxError('not-array-of-class', details); if (!Array.isArray(value)) { throw error; } for (const item of value) { if (!(item instanceof expectedClass)) { throw error; } } }; const finalAssertExports = { hasMethod, isArray, isInstance, isOneOf, isType, isArrayOfClass }; // @ts-ignore try { self['workbox:routing:7.0.0'] && _(); } catch (e) {} /* 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. */ /** * The default HTTP method, 'GET', used when there's no specific method * configured for a route. * * @type {string} * * @private */ const defaultMethod = 'GET'; /** * The list of valid HTTP methods associated with requests that could be routed. * * @type {Array} * * @private */ const validMethods = ['DELETE', 'GET', 'HEAD', 'PATCH', 'POST', 'PUT']; /* 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. */ /** * @param {function()|Object} handler Either a function, or an object with a * 'handle' method. * @return {Object} An object with a handle method. * * @private */ const normalizeHandler = handler => { if (handler && typeof handler === 'object') { { finalAssertExports.hasMethod(handler, 'handle', { moduleName: 'workbox-routing', className: 'Route', funcName: 'constructor', paramName: 'handler' }); } return handler; } else { { finalAssertExports.isType(handler, 'function', { moduleName: 'workbox-routing', className: 'Route', funcName: 'constructor', paramName: 'handler' }); } return { handle: handler }; } }; /* 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. */ /** * A `Route` consists of a pair of callback functions, "match" and "handler". * The "match" callback determine if a route should be used to "handle" a * request by returning a non-falsy value if it can. The "handler" callback * is called when there is a match and should return a Promise that resolves * to a `Response`. * * @memberof workbox-routing */ class Route { /** * Constructor for Route class. * * @param {workbox-routing~matchCallback} match * A callback function that determines whether the route matches a given * `fetch` event by returning a non-falsy value. * @param {workbox-routing~handlerCallback} handler A callback * function that returns a Promise resolving to a Response. * @param {string} [method='GET'] The HTTP method to match the Route * against. */ constructor(match, handler, method = defaultMethod) { { finalAssertExports.isType(match, 'function', { moduleName: 'workbox-routing', className: 'Route', funcName: 'constructor', paramName: 'match' }); if (method) { finalAssertExports.isOneOf(method, validMethods, { paramName: 'method' }); } } // These values are referenced directly by Router so cannot be // altered by minificaton. this.handler = normalizeHandler(handler); this.match = match; this.method = method; } /** * * @param {workbox-routing-handlerCallback} handler A callback * function that returns a Promise resolving to a Response */ setCatchHandler(handler) { this.catchHandler = normalizeHandler(handler); } } /* 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. */ /** * RegExpRoute makes it easy to create a regular expression based * {@link workbox-routing.Route}. * * For same-origin requests the RegExp only needs to match part of the URL. For * requests against third-party servers, you must define a RegExp that matches * the start of the URL. * * @memberof workbox-routing * @extends workbox-routing.Route */ class RegExpRoute extends Route { /** * If the regular expression contains * [capture groups]{@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#grouping-back-references}, * the captured values will be passed to the * {@link workbox-routing~handlerCallback} `params` * argument. * * @param {RegExp} regExp The regular expression to match against URLs. * @param {workbox-routing~handlerCallback} handler A callback * function that returns a Promise resulting in a Response. * @param {string} [method='GET'] The HTTP method to match the Route * against. */ constructor(regExp, handler, method) { { finalAssertExports.isInstance(regExp, RegExp, { moduleName: 'workbox-routing', className: 'RegExpRoute', funcName: 'constructor', paramName: 'pattern' }); } const match = ({ url }) => { const result = regExp.exec(url.href); // Return immediately if there's no match. if (!result) { return; } // Require that the match start at the first character in the URL string // if it's a cross-origin request. // See https://github.com/GoogleChrome/workbox/issues/281 for the context // behind this behavior. if (url.origin !== location.origin && result.index !== 0) { { logger.debug(`The regular expression '${regExp.toString()}' only partially matched ` + `against the cross-origin URL '${url.toString()}'. RegExpRoute's will only ` + `handle cross-origin requests if they match the entire URL.`); } return; } // If the route matches, but there aren't any capture groups defined, then // this will return [], which is truthy and therefore sufficient to // indicate a match. // If there are capture groups, then it will return their values. return result.slice(1); }; super(match, handler, method); } } /* Copyright 2018 Google LLC Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at https://opensource.org/licenses/MIT. */ const getFriendlyURL = url => { const urlObj = new URL(String(url), location.href); // See https://github.com/GoogleChrome/workbox/issues/2323 // We want to include everything, except for the origin if it's same-origin. return urlObj.href.replace(new RegExp(`^${location.origin}`), ''); }; /* 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. */ /** * The Router can be used to process a `FetchEvent` using one or more * {@link workbox-routing.Route}, responding with a `Response` if * a matching route exists. * * If no route matches a given a request, the Router will use a "default" * handler if one is defined. * * Should the matching Route throw an error, the Router will use a "catch" * handler if one is defined to gracefully deal with issues and respond with a * Request. * * If a request matches multiple routes, the **earliest** registered route will * be used to respond to the request. * * @memberof workbox-routing */ class Router { /** * Initializes a new Router. */ constructor() { this._routes = new Map(); this._defaultHandlerMap = new Map(); } /** * @return {Map>} routes A `Map` of HTTP * method name ('GET', etc.) to an array of all the corresponding `Route` * instances that are registered. */ get routes() { return this._routes; } /** * Adds a fetch event listener to respond to events when a route matches * the event's request. */ addFetchListener() { // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705 self.addEventListener('fetch', event => { const { request } = event; const responsePromise = this.handleRequest({ request, event }); if (responsePromise) { event.respondWith(responsePromise); } }); } /** * Adds a message event listener for URLs to cache from the window. * This is useful to cache resources loaded on the page prior to when the * service worker started controlling it. * * The format of the message data sent from the window should be as follows. * Where the `urlsToCache` array may consist of URL strings or an array of * URL string + `requestInit` object (the same as you'd pass to `fetch()`). * * ``` * { * type: 'CACHE_URLS', * payload: { * urlsToCache: [ * './script1.js', * './script2.js', * ['./script3.js', {mode: 'no-cors'}], * ], * }, * } * ``` */ addCacheListener() { // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705 self.addEventListener('message', event => { // event.data is type 'any' // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access if (event.data && event.data.type === 'CACHE_URLS') { // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment const { payload } = event.data; { logger.debug(`Caching URLs from the window`, payload.urlsToCache); } const requestPromises = Promise.all(payload.urlsToCache.map(entry => { if (typeof entry === 'string') { entry = [entry]; } const request = new Request(...entry); return this.handleRequest({ request, event }); // TODO(philipwalton): TypeScript errors without this typecast for // some reason (probably a bug). The real type here should work but // doesn't: `Array | undefined>`. })); // TypeScript event.waitUntil(requestPromises); // If a MessageChannel was used, reply to the message on success. if (event.ports && event.ports[0]) { void requestPromises.then(() => event.ports[0].postMessage(true)); } } }); } /** * Apply the routing rules to a FetchEvent object to get a Response from an * appropriate Route's handler. * * @param {Object} options * @param {Request} options.request The request to handle. * @param {ExtendableEvent} options.event The event that triggered the * request. * @return {Promise|undefined} A promise is returned if a * registered route can handle the request. If there is no matching * route and there's no `defaultHandler`, `undefined` is returned. */ handleRequest({ request, event }) { { finalAssertExports.isInstance(request, Request, { moduleName: 'workbox-routing', className: 'Router', funcName: 'handleRequest', paramName: 'options.request' }); } const url = new URL(request.url, location.href); if (!url.protocol.startsWith('http')) { { logger.debug(`Workbox Router only supports URLs that start with 'http'.`); } return; } const sameOrigin = url.origin === location.origin; const { params, route } = this.findMatchingRoute({ event, request, sameOrigin, url }); let handler = route && route.handler; const debugMessages = []; { if (handler) { debugMessages.push([`Found a route to handle this request:`, route]); if (params) { debugMessages.push([`Passing the following params to the route's handler:`, params]); } } } // If we don't have a handler because there was no matching route, then // fall back to defaultHandler if that's defined. const method = request.method; if (!handler && this._defaultHandlerMap.has(method)) { { debugMessages.push(`Failed to find a matching route. Falling ` + `back to the default handler for ${method}.`); } handler = this._defaultHandlerMap.get(method); } if (!handler) { { // No handler so Workbox will do nothing. If logs is set of debug // i.e. verbose, we should print out this information. logger.debug(`No route found for: ${getFriendlyURL(url)}`); } return; } { // We have a handler, meaning Workbox is going to handle the route. // print the routing details to the console. logger.groupCollapsed(`Router is responding to: ${getFriendlyURL(url)}`); debugMessages.forEach(msg => { if (Array.isArray(msg)) { logger.log(...msg); } else { logger.log(msg); } }); logger.groupEnd(); } // Wrap in try and catch in case the handle method throws a synchronous // error. It should still callback to the catch handler. let responsePromise; try { responsePromise = handler.handle({ url, request, event, params }); } catch (err) { responsePromise = Promise.reject(err); } // Get route's catch handler, if it exists const catchHandler = route && route.catchHandler; if (responsePromise instanceof Promise && (this._catchHandler || catchHandler)) { responsePromise = responsePromise.catch(async err => { // If there's a route catch handler, process that first if (catchHandler) { { // Still include URL here as it will be async from the console group // and may not make sense without the URL logger.groupCollapsed(`Error thrown when responding to: ` + ` ${getFriendlyURL(url)}. Falling back to route's Catch Handler.`); logger.error(`Error thrown by:`, route); logger.error(err); logger.groupEnd(); } try { return await catchHandler.handle({ url, request, event, params }); } catch (catchErr) { if (catchErr instanceof Error) { err = catchErr; } } } if (this._catchHandler) { { // Still include URL here as it will be async from the console group // and may not make sense without the URL logger.groupCollapsed(`Error thrown when responding to: ` + ` ${getFriendlyURL(url)}. Falling back to global Catch Handler.`); logger.error(`Error thrown by:`, route); logger.error(err); logger.groupEnd(); } return this._catchHandler.handle({ url, request, event }); } throw err; }); } return responsePromise; } /** * Checks a request and URL (and optionally an event) against the list of * registered routes, and if there's a match, returns the corresponding * route along with any params generated by the match. * * @param {Object} options * @param {URL} options.url * @param {boolean} options.sameOrigin The result of comparing `url.origin` * against the current origin. * @param {Request} options.request The request to match. * @param {Event} options.event The corresponding event. * @return {Object} An object with `route` and `params` properties. * They are populated if a matching route was found or `undefined` * otherwise. */ findMatchingRoute({ url, sameOrigin, request, event }) { const routes = this._routes.get(request.method) || []; for (const route of routes) { let params; // route.match returns type any, not possible to change right now. // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment const matchResult = route.match({ url, sameOrigin, request, event }); if (matchResult) { { // Warn developers that using an async matchCallback is almost always // not the right thing to do. if (matchResult instanceof Promise) { logger.warn(`While routing ${getFriendlyURL(url)}, an async ` + `matchCallback function was used. Please convert the ` + `following route to use a synchronous matchCallback function:`, route); } } // See https://github.com/GoogleChrome/workbox/issues/2079 // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment params = matchResult; if (Array.isArray(params) && params.length === 0) { // Instead of passing an empty array in as params, use undefined. params = undefined; } else if (matchResult.constructor === Object && // eslint-disable-line Object.keys(matchResult).length === 0) { // Instead of passing an empty object in as params, use undefined. params = undefined; } else if (typeof matchResult === 'boolean') { // For the boolean value true (rather than just something truth-y), // don't set params. // See https://github.com/GoogleChrome/workbox/pull/2134#issuecomment-513924353 params = undefined; } // Return early if have a match. return { route, params }; } } // If no match was found above, return and empty object. return {}; } /** * Define a default `handler` that's called when no routes explicitly * match the incoming request. * * Each HTTP method ('GET', 'POST', etc.) gets its own default handler. * * Without a default handler, unmatched requests will go against the * network as if there were no service worker present. * * @param {workbox-routing~handlerCallback} handler A callback * function that returns a Promise resulting in a Response. * @param {string} [method='GET'] The HTTP method to associate with this * default handler. Each method has its own default. */ setDefaultHandler(handler, method = defaultMethod) { this._defaultHandlerMap.set(method, normalizeHandler(handler)); } /** * If a Route throws an error while handling a request, this `handler` * will be called and given a chance to provide a response. * * @param {workbox-routing~handlerCallback} handler A callback * function that returns a Promise resulting in a Response. */ setCatchHandler(handler) { this._catchHandler = normalizeHandler(handler); } /** * Registers a route with the router. * * @param {workbox-routing.Route} route The route to register. */ registerRoute(route) { { finalAssertExports.isType(route, 'object', { moduleName: 'workbox-routing', className: 'Router', funcName: 'registerRoute', paramName: 'route' }); finalAssertExports.hasMethod(route, 'match', { moduleName: 'workbox-routing', className: 'Router', funcName: 'registerRoute', paramName: 'route' }); finalAssertExports.isType(route.handler, 'object', { moduleName: 'workbox-routing', className: 'Router', funcName: 'registerRoute', paramName: 'route' }); finalAssertExports.hasMethod(route.handler, 'handle', { moduleName: 'workbox-routing', className: 'Router', funcName: 'registerRoute', paramName: 'route.handler' }); finalAssertExports.isType(route.method, 'string', { moduleName: 'workbox-routing', className: 'Router', funcName: 'registerRoute', paramName: 'route.method' }); } if (!this._routes.has(route.method)) { this._routes.set(route.method, []); } // Give precedence to all of the earlier routes by adding this additional // route to the end of the array. this._routes.get(route.method).push(route); } /** * Unregisters a route with the router. * * @param {workbox-routing.Route} route The route to unregister. */ unregisterRoute(route) { if (!this._routes.has(route.method)) { throw new WorkboxError('unregister-route-but-not-found-with-method', { method: route.method }); } const routeIndex = this._routes.get(route.method).indexOf(route); if (routeIndex > -1) { this._routes.get(route.method).splice(routeIndex, 1); } else { throw new WorkboxError('unregister-route-route-not-registered'); } } } /* Copyright 2019 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. */ let defaultRouter; /** * Creates a new, singleton Router instance if one does not exist. If one * does already exist, that instance is returned. * * @private * @return {Router} */ const getOrCreateDefaultRouter = () => { if (!defaultRouter) { defaultRouter = new Router(); // The helpers that use the default Router assume these listeners exist. defaultRouter.addFetchListener(); defaultRouter.addCacheListener(); } return defaultRouter; }; /* Copyright 2019 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. */ /** * Easily register a RegExp, string, or function with a caching * strategy to a singleton Router instance. * * This method will generate a Route for you if needed and * call {@link workbox-routing.Router#registerRoute}. * * @param {RegExp|string|workbox-routing.Route~matchCallback|workbox-routing.Route} capture * If the capture param is a `Route`, all other arguments will be ignored. * @param {workbox-routing~handlerCallback} [handler] A callback * function that returns a Promise resulting in a Response. This parameter * is required if `capture` is not a `Route` object. * @param {string} [method='GET'] The HTTP method to match the Route * against. * @return {workbox-routing.Route} The generated `Route`. * * @memberof workbox-routing */ function registerRoute(capture, handler, method) { let route; if (typeof capture === 'string') { const captureUrl = new URL(capture, location.href); { if (!(capture.startsWith('/') || capture.startsWith('http'))) { throw new WorkboxError('invalid-string', { moduleName: 'workbox-routing', funcName: 'registerRoute', paramName: 'capture' }); } // We want to check if Express-style wildcards are in the pathname only. // TODO: Remove this log message in v4. const valueToCheck = capture.startsWith('http') ? captureUrl.pathname : capture; // See https://github.com/pillarjs/path-to-regexp#parameters const wildcards = '[*:?+]'; if (new RegExp(`${wildcards}`).exec(valueToCheck)) { logger.debug(`The '$capture' parameter contains an Express-style wildcard ` + `character (${wildcards}). Strings are now always interpreted as ` + `exact matches; use a RegExp for partial or wildcard matches.`); } } const matchCallback = ({ url }) => { { if (url.pathname === captureUrl.pathname && url.origin !== captureUrl.origin) { logger.debug(`${capture} only partially matches the cross-origin URL ` + `${url.toString()}. This route will only handle cross-origin requests ` + `if they match the entire URL.`); } } return url.href === captureUrl.href; }; // If `capture` is a string then `handler` and `method` must be present. route = new Route(matchCallback, handler, method); } else if (capture instanceof RegExp) { // If `capture` is a `RegExp` then `handler` and `method` must be present. route = new RegExpRoute(capture, handler, method); } else if (typeof capture === 'function') { // If `capture` is a function then `handler` and `method` must be present. route = new Route(capture, handler, method); } else if (capture instanceof Route) { route = capture; } else { throw new WorkboxError('unsupported-route-type', { moduleName: 'workbox-routing', funcName: 'registerRoute', paramName: 'capture' }); } const defaultRouter = getOrCreateDefaultRouter(); defaultRouter.registerRoute(route); return route; } // @ts-ignore try { self['workbox:strategies:7.0.0'] && _(); } catch (e) {} /* 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. */ const cacheOkAndOpaquePlugin = { /** * Returns a valid response (to allow caching) if the status is 200 (OK) or * 0 (opaque). * * @param {Object} options * @param {Response} options.response * @return {Response|null} * * @private */ cacheWillUpdate: async ({ response }) => { if (response.status === 200 || response.status === 0) { return response; } return null; } }; /* 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. */ const _cacheNameDetails = { googleAnalytics: 'googleAnalytics', precache: 'precache-v2', prefix: 'workbox', runtime: 'runtime', suffix: typeof registration !== 'undefined' ? registration.scope : '' }; const _createCacheName = cacheName => { return [_cacheNameDetails.prefix, cacheName, _cacheNameDetails.suffix].filter(value => value && value.length > 0).join('-'); }; const eachCacheNameDetail = fn => { for (const key of Object.keys(_cacheNameDetails)) { fn(key); } }; const cacheNames = { updateDetails: details => { eachCacheNameDetail(key => { if (typeof details[key] === 'string') { _cacheNameDetails[key] = details[key]; } }); }, getGoogleAnalyticsName: userCacheName => { return userCacheName || _createCacheName(_cacheNameDetails.googleAnalytics); }, getPrecacheName: userCacheName => { return userCacheName || _createCacheName(_cacheNameDetails.precache); }, getPrefix: () => { return _cacheNameDetails.prefix; }, getRuntimeName: userCacheName => { return userCacheName || _createCacheName(_cacheNameDetails.runtime); }, getSuffix: () => { return _cacheNameDetails.suffix; } }; /* Copyright 2020 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. */ function stripParams(fullURL, ignoreParams) { const strippedURL = new URL(fullURL); for (const param of ignoreParams) { strippedURL.searchParams.delete(param); } return strippedURL.href; } /** * Matches an item in the cache, ignoring specific URL params. This is similar * to the `ignoreSearch` option, but it allows you to ignore just specific * params (while continuing to match on the others). * * @private * @param {Cache} cache * @param {Request} request * @param {Object} matchOptions * @param {Array} ignoreParams * @return {Promise} */ async function cacheMatchIgnoreParams(cache, request, ignoreParams, matchOptions) { const strippedRequestURL = stripParams(request.url, ignoreParams); // If the request doesn't include any ignored params, match as normal. if (request.url === strippedRequestURL) { return cache.match(request, matchOptions); } // Otherwise, match by comparing keys const keysOptions = Object.assign(Object.assign({}, matchOptions), { ignoreSearch: true }); const cacheKeys = await cache.keys(request, keysOptions); for (const cacheKey of cacheKeys) { const strippedCacheKeyURL = stripParams(cacheKey.url, ignoreParams); if (strippedRequestURL === strippedCacheKeyURL) { return cache.match(cacheKey, matchOptions); } } return; } /* 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. */ /** * The Deferred class composes Promises in a way that allows for them to be * resolved or rejected from outside the constructor. In most cases promises * should be used directly, but Deferreds can be necessary when the logic to * resolve a promise must be separate. * * @private */ class Deferred { /** * Creates a promise and exposes its resolve and reject functions as methods. */ constructor() { this.promise = new Promise((resolve, reject) => { this.resolve = resolve; this.reject = reject; }); } } /* 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. */ // Callbacks to be executed whenever there's a quota error. // Can't change Function type right now. // eslint-disable-next-line @typescript-eslint/ban-types const quotaErrorCallbacks = new Set(); /* 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. */ /** * Runs all of the callback functions, one at a time sequentially, in the order * in which they were registered. * * @memberof workbox-core * @private */ async function executeQuotaErrorCallbacks() { { logger.log(`About to run ${quotaErrorCallbacks.size} ` + `callbacks to clean up caches.`); } for (const callback of quotaErrorCallbacks) { await callback(); { logger.log(callback, 'is complete.'); } } { logger.log('Finished running callbacks.'); } } /* Copyright 2019 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. */ /** * Returns a promise that resolves and the passed number of milliseconds. * This utility is an async/await-friendly version of `setTimeout`. * * @param {number} ms * @return {Promise} * @private */ function timeout(ms) { return new Promise(resolve => setTimeout(resolve, ms)); } /* Copyright 2020 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. */ function toRequest(input) { return typeof input === 'string' ? new Request(input) : input; } /** * A class created every time a Strategy instance instance calls * {@link workbox-strategies.Strategy~handle} or * {@link workbox-strategies.Strategy~handleAll} that wraps all fetch and * cache actions around plugin callbacks and keeps track of when the strategy * is "done" (i.e. all added `event.waitUntil()` promises have resolved). * * @memberof workbox-strategies */ class StrategyHandler { /** * Creates a new instance associated with the passed strategy and event * that's handling the request. * * The constructor also initializes the state that will be passed to each of * the plugins handling this request. * * @param {workbox-strategies.Strategy} strategy * @param {Object} options * @param {Request|string} options.request A request to run this strategy for. * @param {ExtendableEvent} options.event The event associated with the * request. * @param {URL} [options.url] * @param {*} [options.params] The return value from the * {@link workbox-routing~matchCallback} (if applicable). */ constructor(strategy, options) { this._cacheKeys = {}; /** * The request the strategy is performing (passed to the strategy's * `handle()` or `handleAll()` method). * @name request * @instance * @type {Request} * @memberof workbox-strategies.StrategyHandler */ /** * The event associated with this request. * @name event * @instance * @type {ExtendableEvent} * @memberof workbox-strategies.StrategyHandler */ /** * A `URL` instance of `request.url` (if passed to the strategy's * `handle()` or `handleAll()` method). * Note: the `url` param will be present if the strategy was invoked * from a workbox `Route` object. * @name url * @instance * @type {URL|undefined} * @memberof workbox-strategies.StrategyHandler */ /** * A `param` value (if passed to the strategy's * `handle()` or `handleAll()` method). * Note: the `param` param will be present if the strategy was invoked * from a workbox `Route` object and the * {@link workbox-routing~matchCallback} returned * a truthy value (it will be that value). * @name params * @instance * @type {*|undefined} * @memberof workbox-strategies.StrategyHandler */ { finalAssertExports.isInstance(options.event, ExtendableEvent, { moduleName: 'workbox-strategies', className: 'StrategyHandler', funcName: 'constructor', paramName: 'options.event' }); } Object.assign(this, options); this.event = options.event; this._strategy = strategy; this._handlerDeferred = new Deferred(); this._extendLifetimePromises = []; // Copy the plugins list (since it's mutable on the strategy), // so any mutations don't affect this handler instance. this._plugins = [...strategy.plugins]; this._pluginStateMap = new Map(); for (const plugin of this._plugins) { this._pluginStateMap.set(plugin, {}); } this.event.waitUntil(this._handlerDeferred.promise); } /** * Fetches a given request (and invokes any applicable plugin callback * methods) using the `fetchOptions` (for non-navigation requests) and * `plugins` defined on the `Strategy` object. * * The following plugin lifecycle methods are invoked when using this method: * - `requestWillFetch()` * - `fetchDidSucceed()` * - `fetchDidFail()` * * @param {Request|string} input The URL or request to fetch. * @return {Promise} */ async fetch(input) { const { event } = this; let request = toRequest(input); if (request.mode === 'navigate' && event instanceof FetchEvent && event.preloadResponse) { const possiblePreloadResponse = await event.preloadResponse; if (possiblePreloadResponse) { { logger.log(`Using a preloaded navigation response for ` + `'${getFriendlyURL(request.url)}'`); } return possiblePreloadResponse; } } // If there is a fetchDidFail plugin, we need to save a clone of the // original request before it's either modified by a requestWillFetch // plugin or before the original request's body is consumed via fetch(). const originalRequest = this.hasCallback('fetchDidFail') ? request.clone() : null; try { for (const cb of this.iterateCallbacks('requestWillFetch')) { request = await cb({ request: request.clone(), event }); } } catch (err) { if (err instanceof Error) { throw new WorkboxError('plugin-error-request-will-fetch', { thrownErrorMessage: err.message }); } } // The request can be altered by plugins with `requestWillFetch` making // the original request (most likely from a `fetch` event) different // from the Request we make. Pass both to `fetchDidFail` to aid debugging. const pluginFilteredRequest = request.clone(); try { let fetchResponse; // See https://github.com/GoogleChrome/workbox/issues/1796 fetchResponse = await fetch(request, request.mode === 'navigate' ? undefined : this._strategy.fetchOptions); if ("development" !== 'production') { logger.debug(`Network request for ` + `'${getFriendlyURL(request.url)}' returned a response with ` + `status '${fetchResponse.status}'.`); } for (const callback of this.iterateCallbacks('fetchDidSucceed')) { fetchResponse = await callback({ event, request: pluginFilteredRequest, response: fetchResponse }); } return fetchResponse; } catch (error) { { logger.log(`Network request for ` + `'${getFriendlyURL(request.url)}' threw an error.`, error); } // `originalRequest` will only exist if a `fetchDidFail` callback // is being used (see above). if (originalRequest) { await this.runCallbacks('fetchDidFail', { error: error, event, originalRequest: originalRequest.clone(), request: pluginFilteredRequest.clone() }); } throw error; } } /** * Calls `this.fetch()` and (in the background) runs `this.cachePut()` on * the response generated by `this.fetch()`. * * The call to `this.cachePut()` automatically invokes `this.waitUntil()`, * so you do not have to manually call `waitUntil()` on the event. * * @param {Request|string} input The request or URL to fetch and cache. * @return {Promise} */ async fetchAndCachePut(input) { const response = await this.fetch(input); const responseClone = response.clone(); void this.waitUntil(this.cachePut(input, responseClone)); return response; } /** * Matches a request from the cache (and invokes any applicable plugin * callback methods) using the `cacheName`, `matchOptions`, and `plugins` * defined on the strategy object. * * The following plugin lifecycle methods are invoked when using this method: * - cacheKeyWillByUsed() * - cachedResponseWillByUsed() * * @param {Request|string} key The Request or URL to use as the cache key. * @return {Promise} A matching response, if found. */ async cacheMatch(key) { const request = toRequest(key); let cachedResponse; const { cacheName, matchOptions } = this._strategy; const effectiveRequest = await this.getCacheKey(request, 'read'); const multiMatchOptions = Object.assign(Object.assign({}, matchOptions), { cacheName }); cachedResponse = await caches.match(effectiveRequest, multiMatchOptions); { if (cachedResponse) { logger.debug(`Found a cached response in '${cacheName}'.`); } else { logger.debug(`No cached response found in '${cacheName}'.`); } } for (const callback of this.iterateCallbacks('cachedResponseWillBeUsed')) { cachedResponse = (await callback({ cacheName, matchOptions, cachedResponse, request: effectiveRequest, event: this.event })) || undefined; } return cachedResponse; } /** * Puts a request/response pair in the cache (and invokes any applicable * plugin callback methods) using the `cacheName` and `plugins` defined on * the strategy object. * * The following plugin lifecycle methods are invoked when using this method: * - cacheKeyWillByUsed() * - cacheWillUpdate() * - cacheDidUpdate() * * @param {Request|string} key The request or URL to use as the cache key. * @param {Response} response The response to cache. * @return {Promise} `false` if a cacheWillUpdate caused the response * not be cached, and `true` otherwise. */ async cachePut(key, response) { const request = toRequest(key); // Run in the next task to avoid blocking other cache reads. // https://github.com/w3c/ServiceWorker/issues/1397 await timeout(0); const effectiveRequest = await this.getCacheKey(request, 'write'); { if (effectiveRequest.method && effectiveRequest.method !== 'GET') { throw new WorkboxError('attempt-to-cache-non-get-request', { url: getFriendlyURL(effectiveRequest.url), method: effectiveRequest.method }); } // See https://github.com/GoogleChrome/workbox/issues/2818 const vary = response.headers.get('Vary'); if (vary) { logger.debug(`The response for ${getFriendlyURL(effectiveRequest.url)} ` + `has a 'Vary: ${vary}' header. ` + `Consider setting the {ignoreVary: true} option on your strategy ` + `to ensure cache matching and deletion works as expected.`); } } if (!response) { { logger.error(`Cannot cache non-existent response for ` + `'${getFriendlyURL(effectiveRequest.url)}'.`); } throw new WorkboxError('cache-put-with-no-response', { url: getFriendlyURL(effectiveRequest.url) }); } const responseToCache = await this._ensureResponseSafeToCache(response); if (!responseToCache) { { logger.debug(`Response '${getFriendlyURL(effectiveRequest.url)}' ` + `will not be cached.`, responseToCache); } return false; } const { cacheName, matchOptions } = this._strategy; const cache = await self.caches.open(cacheName); const hasCacheUpdateCallback = this.hasCallback('cacheDidUpdate'); const oldResponse = hasCacheUpdateCallback ? await cacheMatchIgnoreParams( // TODO(philipwalton): the `__WB_REVISION__` param is a precaching // feature. Consider into ways to only add this behavior if using // precaching. cache, effectiveRequest.clone(), ['__WB_REVISION__'], matchOptions) : null; { logger.debug(`Updating the '${cacheName}' cache with a new Response ` + `for ${getFriendlyURL(effectiveRequest.url)}.`); } try { await cache.put(effectiveRequest, hasCacheUpdateCallback ? responseToCache.clone() : responseToCache); } catch (error) { if (error instanceof Error) { // See https://developer.mozilla.org/en-US/docs/Web/API/DOMException#exception-QuotaExceededError if (error.name === 'QuotaExceededError') { await executeQuotaErrorCallbacks(); } throw error; } } for (const callback of this.iterateCallbacks('cacheDidUpdate')) { await callback({ cacheName, oldResponse, newResponse: responseToCache.clone(), request: effectiveRequest, event: this.event }); } return true; } /** * Checks the list of plugins for the `cacheKeyWillBeUsed` callback, and * executes any of those callbacks found in sequence. The final `Request` * object returned by the last plugin is treated as the cache key for cache * reads and/or writes. If no `cacheKeyWillBeUsed` plugin callbacks have * been registered, the passed request is returned unmodified * * @param {Request} request * @param {string} mode * @return {Promise} */ async getCacheKey(request, mode) { const key = `${request.url} | ${mode}`; if (!this._cacheKeys[key]) { let effectiveRequest = request; for (const callback of this.iterateCallbacks('cacheKeyWillBeUsed')) { effectiveRequest = toRequest(await callback({ mode, request: effectiveRequest, event: this.event, // params has a type any can't change right now. params: this.params // eslint-disable-line })); } this._cacheKeys[key] = effectiveRequest; } return this._cacheKeys[key]; } /** * Returns true if the strategy has at least one plugin with the given * callback. * * @param {string} name The name of the callback to check for. * @return {boolean} */ hasCallback(name) { for (const plugin of this._strategy.plugins) { if (name in plugin) { return true; } } return false; } /** * Runs all plugin callbacks matching the given name, in order, passing the * given param object (merged ith the current plugin state) as the only * argument. * * Note: since this method runs all plugins, it's not suitable for cases * where the return value of a callback needs to be applied prior to calling * the next callback. See * {@link workbox-strategies.StrategyHandler#iterateCallbacks} * below for how to handle that case. * * @param {string} name The name of the callback to run within each plugin. * @param {Object} param The object to pass as the first (and only) param * when executing each callback. This object will be merged with the * current plugin state prior to callback execution. */ async runCallbacks(name, param) { for (const callback of this.iterateCallbacks(name)) { // TODO(philipwalton): not sure why `any` is needed. It seems like // this should work with `as WorkboxPluginCallbackParam[C]`. await callback(param); } } /** * Accepts a callback and returns an iterable of matching plugin callbacks, * where each callback is wrapped with the current handler state (i.e. when * you call each callback, whatever object parameter you pass it will * be merged with the plugin's current state). * * @param {string} name The name fo the callback to run * @return {Array} */ *iterateCallbacks(name) { for (const plugin of this._strategy.plugins) { if (typeof plugin[name] === 'function') { const state = this._pluginStateMap.get(plugin); const statefulCallback = param => { const statefulParam = Object.assign(Object.assign({}, param), { state }); // TODO(philipwalton): not sure why `any` is needed. It seems like // this should work with `as WorkboxPluginCallbackParam[C]`. return plugin[name](statefulParam); }; yield statefulCallback; } } } /** * Adds a promise to the * [extend lifetime promises]{@link https://w3c.github.io/ServiceWorker/#extendableevent-extend-lifetime-promises} * of the event event associated with the request being handled (usually a * `FetchEvent`). * * Note: you can await * {@link workbox-strategies.StrategyHandler~doneWaiting} * to know when all added promises have settled. * * @param {Promise} promise A promise to add to the extend lifetime promises * of the event that triggered the request. */ waitUntil(promise) { this._extendLifetimePromises.push(promise); return promise; } /** * Returns a promise that resolves once all promises passed to * {@link workbox-strategies.StrategyHandler~waitUntil} * have settled. * * Note: any work done after `doneWaiting()` settles should be manually * passed to an event's `waitUntil()` method (not this handler's * `waitUntil()` method), otherwise the service worker thread my be killed * prior to your work completing. */ async doneWaiting() { let promise; while (promise = this._extendLifetimePromises.shift()) { await promise; } } /** * Stops running the strategy and immediately resolves any pending * `waitUntil()` promises. */ destroy() { this._handlerDeferred.resolve(null); } /** * This method will call cacheWillUpdate on the available plugins (or use * status === 200) to determine if the Response is safe and valid to cache. * * @param {Request} options.request * @param {Response} options.response * @return {Promise} * * @private */ async _ensureResponseSafeToCache(response) { let responseToCache = response; let pluginsUsed = false; for (const callback of this.iterateCallbacks('cacheWillUpdate')) { responseToCache = (await callback({ request: this.request, response: responseToCache, event: this.event })) || undefined; pluginsUsed = true; if (!responseToCache) { break; } } if (!pluginsUsed) { if (responseToCache && responseToCache.status !== 200) { responseToCache = undefined; } { if (responseToCache) { if (responseToCache.status !== 200) { if (responseToCache.status === 0) { logger.warn(`The response for '${this.request.url}' ` + `is an opaque response. The caching strategy that you're ` + `using will not cache opaque responses by default.`); } else { logger.debug(`The response for '${this.request.url}' ` + `returned a status code of '${response.status}' and won't ` + `be cached as a result.`); } } } } } return responseToCache; } } /* Copyright 2020 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. */ /** * An abstract base class that all other strategy classes must extend from: * * @memberof workbox-strategies */ class Strategy { /** * Creates a new instance of the strategy and sets all documented option * properties as public instance properties. * * Note: if a custom strategy class extends the base Strategy class and does * not need more than these properties, it does not need to define its own * constructor. * * @param {Object} [options] * @param {string} [options.cacheName] Cache name to store and retrieve * requests. Defaults to the cache names provided by * {@link 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 [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796) * `fetch()` requests made by this strategy. * @param {Object} [options.matchOptions] The * [`CacheQueryOptions`]{@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions} * for any `cache.match()` or `cache.put()` calls made by this strategy. */ constructor(options = {}) { /** * Cache name to store and retrieve * requests. Defaults to the cache names provided by * {@link workbox-core.cacheNames}. * * @type {string} */ this.cacheName = cacheNames.getRuntimeName(options.cacheName); /** * The list * [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins} * used by this strategy. * * @type {Array} */ this.plugins = options.plugins || []; /** * Values passed along to the * [`init`]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters} * of all fetch() requests made by this strategy. * * @type {Object} */ this.fetchOptions = options.fetchOptions; /** * The * [`CacheQueryOptions`]{@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions} * for any `cache.match()` or `cache.put()` calls made by this strategy. * * @type {Object} */ this.matchOptions = options.matchOptions; } /** * Perform a request strategy and returns a `Promise` that will resolve with * a `Response`, invoking all relevant plugin callbacks. * * When a strategy instance is registered with a Workbox * {@link workbox-routing.Route}, this method is automatically * called when the route matches. * * Alternatively, this method can be used in a standalone `FetchEvent` * listener by passing it to `event.respondWith()`. * * @param {FetchEvent|Object} options A `FetchEvent` or an object with the * properties listed below. * @param {Request|string} options.request A request to run this strategy for. * @param {ExtendableEvent} options.event The event associated with the * request. * @param {URL} [options.url] * @param {*} [options.params] */ handle(options) { const [responseDone] = this.handleAll(options); return responseDone; } /** * Similar to {@link workbox-strategies.Strategy~handle}, but * instead of just returning a `Promise` that resolves to a `Response` it * it will return an tuple of `[response, done]` promises, where the former * (`response`) is equivalent to what `handle()` returns, and the latter is a * Promise that will resolve once any promises that were added to * `event.waitUntil()` as part of performing the strategy have completed. * * You can await the `done` promise to ensure any extra work performed by * the strategy (usually caching responses) completes successfully. * * @param {FetchEvent|Object} options A `FetchEvent` or an object with the * properties listed below. * @param {Request|string} options.request A request to run this strategy for. * @param {ExtendableEvent} options.event The event associated with the * request. * @param {URL} [options.url] * @param {*} [options.params] * @return {Array} A tuple of [response, done] * promises that can be used to determine when the response resolves as * well as when the handler has completed all its work. */ handleAll(options) { // Allow for flexible options to be passed. if (options instanceof FetchEvent) { options = { event: options, request: options.request }; } const event = options.event; const request = typeof options.request === 'string' ? new Request(options.request) : options.request; const params = 'params' in options ? options.params : undefined; const handler = new StrategyHandler(this, { event, request, params }); const responseDone = this._getResponse(handler, request, event); const handlerDone = this._awaitComplete(responseDone, handler, request, event); // Return an array of promises, suitable for use with Promise.all(). return [responseDone, handlerDone]; } async _getResponse(handler, request, event) { await handler.runCallbacks('handlerWillStart', { event, request }); let response = undefined; try { response = await this._handle(request, handler); // The "official" Strategy subclasses all throw this error automatically, // but in case a third-party Strategy doesn't, ensure that we have a // consistent failure when there's no response or an error response. if (!response || response.type === 'error') { throw new WorkboxError('no-response', { url: request.url }); } } catch (error) { if (error instanceof Error) { for (const callback of handler.iterateCallbacks('handlerDidError')) { response = await callback({ error, event, request }); if (response) { break; } } } if (!response) { throw error; } else { logger.log(`While responding to '${getFriendlyURL(request.url)}', ` + `an ${error instanceof Error ? error.toString() : ''} error occurred. Using a fallback response provided by ` + `a handlerDidError plugin.`); } } for (const callback of handler.iterateCallbacks('handlerWillRespond')) { response = await callback({ event, request, response }); } return response; } async _awaitComplete(responseDone, handler, request, event) { let response; let error; try { response = await responseDone; } catch (error) { // Ignore errors, as response errors should be caught via the `response` // promise above. The `done` promise will only throw for errors in // promises passed to `handler.waitUntil()`. } try { await handler.runCallbacks('handlerDidRespond', { event, request, response }); await handler.doneWaiting(); } catch (waitUntilError) { if (waitUntilError instanceof Error) { error = waitUntilError; } } await handler.runCallbacks('handlerDidComplete', { event, request, response, error: error }); handler.destroy(); if (error) { throw error; } } } /** * Classes extending the `Strategy` based class should implement this method, * and leverage the {@link workbox-strategies.StrategyHandler} * arg to perform all fetching and cache logic, which will ensure all relevant * cache, cache options, fetch options and plugins are used (per the current * strategy instance). * * @name _handle * @instance * @abstract * @function * @param {Request} request * @param {workbox-strategies.StrategyHandler} handler * @return {Promise} * * @memberof workbox-strategies.Strategy */ /* 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. */ const messages = { strategyStart: (strategyName, request) => `Using ${strategyName} to respond to '${getFriendlyURL(request.url)}'`, printFinalResponse: response => { if (response) { logger.groupCollapsed(`View the final response here.`); logger.log(response || '[No response returned]'); logger.groupEnd(); } } }; /* 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. */ /** * An implementation of a * [network first](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#network-first-falling-back-to-cache) * request strategy. * * By default, this strategy will cache responses with a 200 status code as * well as [opaque responses](https://developer.chrome.com/docs/workbox/caching-resources-during-runtime/#opaque-responses). * Opaque responses are are cross-origin requests where the response doesn't * support [CORS](https://enable-cors.org/). * * If the network request fails, and there is no cache match, this will throw * a `WorkboxError` exception. * * @extends workbox-strategies.Strategy * @memberof workbox-strategies */ class NetworkFirst extends Strategy { /** * @param {Object} [options] * @param {string} [options.cacheName] Cache name to store and retrieve * requests. Defaults to cache names provided by * {@link 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 [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796) * `fetch()` requests made by this strategy. * @param {Object} [options.matchOptions] [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions) * @param {number} [options.networkTimeoutSeconds] If set, any network requests * that fail to respond within the timeout will fallback to the cache. * * This option can be used to combat * "[lie-fi]{@link https://developers.google.com/web/fundamentals/performance/poor-connectivity/#lie-fi}" * scenarios. */ constructor(options = {}) { super(options); // If this instance contains no plugins with a 'cacheWillUpdate' callback, // prepend the `cacheOkAndOpaquePlugin` plugin to the plugins list. if (!this.plugins.some(p => 'cacheWillUpdate' in p)) { this.plugins.unshift(cacheOkAndOpaquePlugin); } this._networkTimeoutSeconds = options.networkTimeoutSeconds || 0; { if (this._networkTimeoutSeconds) { finalAssertExports.isType(this._networkTimeoutSeconds, 'number', { moduleName: 'workbox-strategies', className: this.constructor.name, funcName: 'constructor', paramName: 'networkTimeoutSeconds' }); } } } /** * @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} */ async _handle(request, handler) { const logs = []; { finalAssertExports.isInstance(request, Request, { moduleName: 'workbox-strategies', className: this.constructor.name, funcName: 'handle', paramName: 'makeRequest' }); } const promises = []; let timeoutId; if (this._networkTimeoutSeconds) { const { id, promise } = this._getTimeoutPromise({ request, logs, handler }); timeoutId = id; promises.push(promise); } const networkPromise = this._getNetworkPromise({ timeoutId, request, logs, handler }); promises.push(networkPromise); const response = await handler.waitUntil((async () => { // Promise.race() will resolve as soon as the first promise resolves. return (await handler.waitUntil(Promise.race(promises))) || ( // If Promise.race() resolved with null, it might be due to a network // timeout + a cache miss. If that were to happen, we'd rather wait until // the networkPromise resolves instead of returning null. // Note that it's fine to await an already-resolved promise, so we don't // have to check to see if it's still "in flight". await networkPromise); })()); { logger.groupCollapsed(messages.strategyStart(this.constructor.name, request)); for (const log of logs) { logger.log(log); } messages.printFinalResponse(response); logger.groupEnd(); } if (!response) { throw new WorkboxError('no-response', { url: request.url }); } return response; } /** * @param {Object} options * @param {Request} options.request * @param {Array} options.logs A reference to the logs array * @param {Event} options.event * @return {Promise} * * @private */ _getTimeoutPromise({ request, logs, handler }) { let timeoutId; const timeoutPromise = new Promise(resolve => { const onNetworkTimeout = async () => { { logs.push(`Timing out the network response at ` + `${this._networkTimeoutSeconds} seconds.`); } resolve(await handler.cacheMatch(request)); }; timeoutId = setTimeout(onNetworkTimeout, this._networkTimeoutSeconds * 1000); }); return { promise: timeoutPromise, id: timeoutId }; } /** * @param {Object} options * @param {number|undefined} options.timeoutId * @param {Request} options.request * @param {Array} options.logs A reference to the logs Array. * @param {Event} options.event * @return {Promise} * * @private */ async _getNetworkPromise({ timeoutId, request, logs, handler }) { let error; let response; try { response = await handler.fetchAndCachePut(request); } catch (fetchError) { if (fetchError instanceof Error) { error = fetchError; } } if (timeoutId) { clearTimeout(timeoutId); } { if (response) { logs.push(`Got response from network.`); } else { logs.push(`Unable to get a response from the network. Will respond ` + `with a cached response.`); } } if (error || !response) { response = await handler.cacheMatch(request); { if (response) { logs.push(`Found a cached response in the '${this.cacheName}'` + ` cache.`); } else { logs.push(`No response found in the '${this.cacheName}' cache.`); } } } return response; } } /* Copyright 2019 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. */ /** * Claim any currently available clients once the service worker * becomes active. This is normally used in conjunction with `skipWaiting()`. * * @memberof workbox-core */ function clientsClaim() { self.addEventListener('activate', () => self.clients.claim()); } /* Copyright 2020 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. */ /** * A utility method that makes it easier to use `event.waitUntil` with * async functions and return the result. * * @param {ExtendableEvent} event * @param {Function} asyncFn * @return {Function} * @private */ function waitUntil(event, asyncFn) { const returnPromise = asyncFn(); event.waitUntil(returnPromise); return returnPromise; } // @ts-ignore try { self['workbox:precaching:7.0.0'] && _(); } catch (e) {} /* 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. */ // Name of the search parameter used to store revision info. const REVISION_SEARCH_PARAM = '__WB_REVISION__'; /** * Converts a manifest entry into a versioned URL suitable for precaching. * * @param {Object|string} entry * @return {string} A URL with versioning info. * * @private * @memberof workbox-precaching */ function createCacheKey(entry) { if (!entry) { throw new WorkboxError('add-to-cache-list-unexpected-type', { entry }); } // If a precache manifest entry is a string, it's assumed to be a versioned // URL, like '/app.abcd1234.js'. Return as-is. if (typeof entry === 'string') { const urlObject = new URL(entry, location.href); return { cacheKey: urlObject.href, url: urlObject.href }; } const { revision, url } = entry; if (!url) { throw new WorkboxError('add-to-cache-list-unexpected-type', { entry }); } // If there's just a URL and no revision, then it's also assumed to be a // versioned URL. if (!revision) { const urlObject = new URL(url, location.href); return { cacheKey: urlObject.href, url: urlObject.href }; } // Otherwise, construct a properly versioned URL using the custom Workbox // search parameter along with the revision info. const cacheKeyURL = new URL(url, location.href); const originalURL = new URL(url, location.href); cacheKeyURL.searchParams.set(REVISION_SEARCH_PARAM, revision); return { cacheKey: cacheKeyURL.href, url: originalURL.href }; } /* Copyright 2020 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. */ /** * A plugin, designed to be used with PrecacheController, to determine the * of assets that were updated (or not updated) during the install event. * * @private */ class PrecacheInstallReportPlugin { constructor() { this.updatedURLs = []; this.notUpdatedURLs = []; this.handlerWillStart = async ({ request, state }) => { // TODO: `state` should never be undefined... if (state) { state.originalRequest = request; } }; this.cachedResponseWillBeUsed = async ({ event, state, cachedResponse }) => { if (event.type === 'install') { if (state && state.originalRequest && state.originalRequest instanceof Request) { // TODO: `state` should never be undefined... const url = state.originalRequest.url; if (cachedResponse) { this.notUpdatedURLs.push(url); } else { this.updatedURLs.push(url); } } } return cachedResponse; }; } } /* Copyright 2020 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. */ /** * A plugin, designed to be used with PrecacheController, to translate URLs into * the corresponding cache key, based on the current revision info. * * @private */ class PrecacheCacheKeyPlugin { constructor({ precacheController }) { this.cacheKeyWillBeUsed = async ({ request, params }) => { // Params is type any, can't change right now. /* eslint-disable */ const cacheKey = (params === null || params === void 0 ? void 0 : params.cacheKey) || this._precacheController.getCacheKeyForURL(request.url); /* eslint-enable */ return cacheKey ? new Request(cacheKey, { headers: request.headers }) : request; }; this._precacheController = precacheController; } } /* 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. */ /** * @param {string} groupTitle * @param {Array} deletedURLs * * @private */ const logGroup = (groupTitle, deletedURLs) => { logger.groupCollapsed(groupTitle); for (const url of deletedURLs) { logger.log(url); } logger.groupEnd(); }; /** * @param {Array} deletedURLs * * @private * @memberof workbox-precaching */ function printCleanupDetails(deletedURLs) { const deletionCount = deletedURLs.length; if (deletionCount > 0) { logger.groupCollapsed(`During precaching cleanup, ` + `${deletionCount} cached ` + `request${deletionCount === 1 ? ' was' : 's were'} deleted.`); logGroup('Deleted Cache Requests', deletedURLs); logger.groupEnd(); } } /* 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. */ /** * @param {string} groupTitle * @param {Array} urls * * @private */ function _nestedGroup(groupTitle, urls) { if (urls.length === 0) { return; } logger.groupCollapsed(groupTitle); for (const url of urls) { logger.log(url); } logger.groupEnd(); } /** * @param {Array} urlsToPrecache * @param {Array} urlsAlreadyPrecached * * @private * @memberof workbox-precaching */ function printInstallDetails(urlsToPrecache, urlsAlreadyPrecached) { const precachedCount = urlsToPrecache.length; const alreadyPrecachedCount = urlsAlreadyPrecached.length; if (precachedCount || alreadyPrecachedCount) { let message = `Precaching ${precachedCount} file${precachedCount === 1 ? '' : 's'}.`; if (alreadyPrecachedCount > 0) { message += ` ${alreadyPrecachedCount} ` + `file${alreadyPrecachedCount === 1 ? ' is' : 's are'} already cached.`; } logger.groupCollapsed(message); _nestedGroup(`View newly precached URLs.`, urlsToPrecache); _nestedGroup(`View previously precached URLs.`, urlsAlreadyPrecached); logger.groupEnd(); } } /* Copyright 2019 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. */ let supportStatus; /** * A utility function that determines whether the current browser supports * constructing a new `Response` from a `response.body` stream. * * @return {boolean} `true`, if the current browser can successfully * construct a `Response` from a `response.body` stream, `false` otherwise. * * @private */ function canConstructResponseFromBodyStream() { if (supportStatus === undefined) { const testResponse = new Response(''); if ('body' in testResponse) { try { new Response(testResponse.body); supportStatus = true; } catch (error) { supportStatus = false; } } supportStatus = false; } return supportStatus; } /* Copyright 2019 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. */ /** * Allows developers to copy a response and modify its `headers`, `status`, * or `statusText` values (the values settable via a * [`ResponseInit`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Response/Response#Syntax} * object in the constructor). * To modify these values, pass a function as the second argument. That * function will be invoked with a single object with the response properties * `{headers, status, statusText}`. The return value of this function will * be used as the `ResponseInit` for the new `Response`. To change the values * either modify the passed parameter(s) and return it, or return a totally * new object. * * This method is intentionally limited to same-origin responses, regardless of * whether CORS was used or not. * * @param {Response} response * @param {Function} modifier * @memberof workbox-core */ async function copyResponse(response, modifier) { let origin = null; // If response.url isn't set, assume it's cross-origin and keep origin null. if (response.url) { const responseURL = new URL(response.url); origin = responseURL.origin; } if (origin !== self.location.origin) { throw new WorkboxError('cross-origin-copy-response', { origin }); } const clonedResponse = response.clone(); // Create a fresh `ResponseInit` object by cloning the headers. const responseInit = { headers: new Headers(clonedResponse.headers), status: clonedResponse.status, statusText: clonedResponse.statusText }; // Apply any user modifications. const modifiedResponseInit = modifier ? modifier(responseInit) : responseInit; // Create the new response from the body stream and `ResponseInit` // modifications. Note: not all browsers support the Response.body stream, // so fall back to reading the entire body into memory as a blob. const body = canConstructResponseFromBodyStream() ? clonedResponse.body : await clonedResponse.blob(); return new Response(body, modifiedResponseInit); } /* Copyright 2020 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. */ /** * A {@link workbox-strategies.Strategy} implementation * specifically designed to work with * {@link workbox-precaching.PrecacheController} * to both cache and fetch precached assets. * * Note: an instance of this class is created automatically when creating a * `PrecacheController`; it's generally not necessary to create this yourself. * * @extends workbox-strategies.Strategy * @memberof workbox-precaching */ class PrecacheStrategy extends Strategy { /** * * @param {Object} [options] * @param {string} [options.cacheName] Cache name to store and retrieve * requests. Defaults to the cache names provided by * {@link workbox-core.cacheNames}. * @param {Array} [options.plugins] {@link https://developers.google.com/web/tools/workbox/guides/using-plugins|Plugins} * to use in conjunction with this caching strategy. * @param {Object} [options.fetchOptions] Values passed along to the * {@link https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters|init} * of all fetch() requests made by this strategy. * @param {Object} [options.matchOptions] The * {@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions|CacheQueryOptions} * for any `cache.match()` or `cache.put()` calls made by this strategy. * @param {boolean} [options.fallbackToNetwork=true] Whether to attempt to * get the response from the network if there's a precache miss. */ constructor(options = {}) { options.cacheName = cacheNames.getPrecacheName(options.cacheName); super(options); this._fallbackToNetwork = options.fallbackToNetwork === false ? false : true; // Redirected responses cannot be used to satisfy a navigation request, so // any redirected response must be "copied" rather than cloned, so the new // response doesn't contain the `redirected` flag. See: // https://bugs.chromium.org/p/chromium/issues/detail?id=669363&desc=2#c1 this.plugins.push(PrecacheStrategy.copyRedirectedCacheableResponsesPlugin); } /** * @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} */ async _handle(request, handler) { const response = await handler.cacheMatch(request); if (response) { return response; } // If this is an `install` event for an entry that isn't already cached, // then populate the cache. if (handler.event && handler.event.type === 'install') { return await this._handleInstall(request, handler); } // Getting here means something went wrong. An entry that should have been // precached wasn't found in the cache. return await this._handleFetch(request, handler); } async _handleFetch(request, handler) { let response; const params = handler.params || {}; // Fall back to the network if we're configured to do so. if (this._fallbackToNetwork) { { logger.warn(`The precached response for ` + `${getFriendlyURL(request.url)} in ${this.cacheName} was not ` + `found. Falling back to the network.`); } const integrityInManifest = params.integrity; const integrityInRequest = request.integrity; const noIntegrityConflict = !integrityInRequest || integrityInRequest === integrityInManifest; // Do not add integrity if the original request is no-cors // See https://github.com/GoogleChrome/workbox/issues/3096 response = await handler.fetch(new Request(request, { integrity: request.mode !== 'no-cors' ? integrityInRequest || integrityInManifest : undefined })); // It's only "safe" to repair the cache if we're using SRI to guarantee // that the response matches the precache manifest's expectations, // and there's either a) no integrity property in the incoming request // or b) there is an integrity, and it matches the precache manifest. // See https://github.com/GoogleChrome/workbox/issues/2858 // Also if the original request users no-cors we don't use integrity. // See https://github.com/GoogleChrome/workbox/issues/3096 if (integrityInManifest && noIntegrityConflict && request.mode !== 'no-cors') { this._useDefaultCacheabilityPluginIfNeeded(); const wasCached = await handler.cachePut(request, response.clone()); { if (wasCached) { logger.log(`A response for ${getFriendlyURL(request.url)} ` + `was used to "repair" the precache.`); } } } } else { // This shouldn't normally happen, but there are edge cases: // https://github.com/GoogleChrome/workbox/issues/1441 throw new WorkboxError('missing-precache-entry', { cacheName: this.cacheName, url: request.url }); } { const cacheKey = params.cacheKey || (await handler.getCacheKey(request, 'read')); // Workbox is going to handle the route. // print the routing details to the console. logger.groupCollapsed(`Precaching is responding to: ` + getFriendlyURL(request.url)); logger.log(`Serving the precached url: ${getFriendlyURL(cacheKey instanceof Request ? cacheKey.url : cacheKey)}`); logger.groupCollapsed(`View request details here.`); logger.log(request); logger.groupEnd(); logger.groupCollapsed(`View response details here.`); logger.log(response); logger.groupEnd(); logger.groupEnd(); } return response; } async _handleInstall(request, handler) { this._useDefaultCacheabilityPluginIfNeeded(); const response = await handler.fetch(request); // Make sure we defer cachePut() until after we know the response // should be cached; see https://github.com/GoogleChrome/workbox/issues/2737 const wasCached = await handler.cachePut(request, response.clone()); if (!wasCached) { // Throwing here will lead to the `install` handler failing, which // we want to do if *any* of the responses aren't safe to cache. throw new WorkboxError('bad-precaching-response', { url: request.url, status: response.status }); } return response; } /** * This method is complex, as there a number of things to account for: * * The `plugins` array can be set at construction, and/or it might be added to * to at any time before the strategy is used. * * At the time the strategy is used (i.e. during an `install` event), there * needs to be at least one plugin that implements `cacheWillUpdate` in the * array, other than `copyRedirectedCacheableResponsesPlugin`. * * - If this method is called and there are no suitable `cacheWillUpdate` * plugins, we need to add `defaultPrecacheCacheabilityPlugin`. * * - If this method is called and there is exactly one `cacheWillUpdate`, then * we don't have to do anything (this might be a previously added * `defaultPrecacheCacheabilityPlugin`, or it might be a custom plugin). * * - If this method is called and there is more than one `cacheWillUpdate`, * then we need to check if one is `defaultPrecacheCacheabilityPlugin`. If so, * we need to remove it. (This situation is unlikely, but it could happen if * the strategy is used multiple times, the first without a `cacheWillUpdate`, * and then later on after manually adding a custom `cacheWillUpdate`.) * * See https://github.com/GoogleChrome/workbox/issues/2737 for more context. * * @private */ _useDefaultCacheabilityPluginIfNeeded() { let defaultPluginIndex = null; let cacheWillUpdatePluginCount = 0; for (const [index, plugin] of this.plugins.entries()) { // Ignore the copy redirected plugin when determining what to do. if (plugin === PrecacheStrategy.copyRedirectedCacheableResponsesPlugin) { continue; } // Save the default plugin's index, in case it needs to be removed. if (plugin === PrecacheStrategy.defaultPrecacheCacheabilityPlugin) { defaultPluginIndex = index; } if (plugin.cacheWillUpdate) { cacheWillUpdatePluginCount++; } } if (cacheWillUpdatePluginCount === 0) { this.plugins.push(PrecacheStrategy.defaultPrecacheCacheabilityPlugin); } else if (cacheWillUpdatePluginCount > 1 && defaultPluginIndex !== null) { // Only remove the default plugin; multiple custom plugins are allowed. this.plugins.splice(defaultPluginIndex, 1); } // Nothing needs to be done if cacheWillUpdatePluginCount is 1 } } PrecacheStrategy.defaultPrecacheCacheabilityPlugin = { async cacheWillUpdate({ response }) { if (!response || response.status >= 400) { return null; } return response; } }; PrecacheStrategy.copyRedirectedCacheableResponsesPlugin = { async cacheWillUpdate({ response }) { return response.redirected ? await copyResponse(response) : response; } }; /* Copyright 2019 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. */ /** * Performs efficient precaching of assets. * * @memberof workbox-precaching */ class PrecacheController { /** * Create a new PrecacheController. * * @param {Object} [options] * @param {string} [options.cacheName] The cache to use for precaching. * @param {string} [options.plugins] Plugins to use when precaching as well * as responding to fetch events for precached assets. * @param {boolean} [options.fallbackToNetwork=true] Whether to attempt to * get the response from the network if there's a precache miss. */ constructor({ cacheName, plugins = [], fallbackToNetwork = true } = {}) { this._urlsToCacheKeys = new Map(); this._urlsToCacheModes = new Map(); this._cacheKeysToIntegrities = new Map(); this._strategy = new PrecacheStrategy({ cacheName: cacheNames.getPrecacheName(cacheName), plugins: [...plugins, new PrecacheCacheKeyPlugin({ precacheController: this })], fallbackToNetwork }); // Bind the install and activate methods to the instance. this.install = this.install.bind(this); this.activate = this.activate.bind(this); } /** * @type {workbox-precaching.PrecacheStrategy} The strategy created by this controller and * used to cache assets and respond to fetch events. */ get strategy() { return this._strategy; } /** * Adds items to the precache list, removing any duplicates and * stores the files in the * {@link workbox-core.cacheNames|"precache cache"} when the service * worker installs. * * This method can be called multiple times. * * @param {Array} [entries=[]] Array of entries to precache. */ precache(entries) { this.addToCacheList(entries); if (!this._installAndActiveListenersAdded) { self.addEventListener('install', this.install); self.addEventListener('activate', this.activate); this._installAndActiveListenersAdded = true; } } /** * This method will add items to the precache list, removing duplicates * and ensuring the information is valid. * * @param {Array} entries * Array of entries to precache. */ addToCacheList(entries) { { finalAssertExports.isArray(entries, { moduleName: 'workbox-precaching', className: 'PrecacheController', funcName: 'addToCacheList', paramName: 'entries' }); } const urlsToWarnAbout = []; for (const entry of entries) { // See https://github.com/GoogleChrome/workbox/issues/2259 if (typeof entry === 'string') { urlsToWarnAbout.push(entry); } else if (entry && entry.revision === undefined) { urlsToWarnAbout.push(entry.url); } const { cacheKey, url } = createCacheKey(entry); const cacheMode = typeof entry !== 'string' && entry.revision ? 'reload' : 'default'; if (this._urlsToCacheKeys.has(url) && this._urlsToCacheKeys.get(url) !== cacheKey) { throw new WorkboxError('add-to-cache-list-conflicting-entries', { firstEntry: this._urlsToCacheKeys.get(url), secondEntry: cacheKey }); } if (typeof entry !== 'string' && entry.integrity) { if (this._cacheKeysToIntegrities.has(cacheKey) && this._cacheKeysToIntegrities.get(cacheKey) !== entry.integrity) { throw new WorkboxError('add-to-cache-list-conflicting-integrities', { url }); } this._cacheKeysToIntegrities.set(cacheKey, entry.integrity); } this._urlsToCacheKeys.set(url, cacheKey); this._urlsToCacheModes.set(url, cacheMode); if (urlsToWarnAbout.length > 0) { const warningMessage = `Workbox is precaching URLs without revision ` + `info: ${urlsToWarnAbout.join(', ')}\nThis is generally NOT safe. ` + `Learn more at https://bit.ly/wb-precache`; { logger.warn(warningMessage); } } } } /** * Precaches new and updated assets. Call this method from the service worker * install event. * * Note: this method calls `event.waitUntil()` for you, so you do not need * to call it yourself in your event handlers. * * @param {ExtendableEvent} event * @return {Promise} */ install(event) { // waitUntil returns Promise // eslint-disable-next-line @typescript-eslint/no-unsafe-return return waitUntil(event, async () => { const installReportPlugin = new PrecacheInstallReportPlugin(); this.strategy.plugins.push(installReportPlugin); // Cache entries one at a time. // See https://github.com/GoogleChrome/workbox/issues/2528 for (const [url, cacheKey] of this._urlsToCacheKeys) { const integrity = this._cacheKeysToIntegrities.get(cacheKey); const cacheMode = this._urlsToCacheModes.get(url); const request = new Request(url, { integrity, cache: cacheMode, credentials: 'same-origin' }); await Promise.all(this.strategy.handleAll({ params: { cacheKey }, request, event })); } const { updatedURLs, notUpdatedURLs } = installReportPlugin; { printInstallDetails(updatedURLs, notUpdatedURLs); } return { updatedURLs, notUpdatedURLs }; }); } /** * Deletes assets that are no longer present in the current precache manifest. * Call this method from the service worker activate event. * * Note: this method calls `event.waitUntil()` for you, so you do not need * to call it yourself in your event handlers. * * @param {ExtendableEvent} event * @return {Promise} */ activate(event) { // waitUntil returns Promise // eslint-disable-next-line @typescript-eslint/no-unsafe-return return waitUntil(event, async () => { const cache = await self.caches.open(this.strategy.cacheName); const currentlyCachedRequests = await cache.keys(); const expectedCacheKeys = new Set(this._urlsToCacheKeys.values()); const deletedURLs = []; for (const request of currentlyCachedRequests) { if (!expectedCacheKeys.has(request.url)) { await cache.delete(request); deletedURLs.push(request.url); } } { printCleanupDetails(deletedURLs); } return { deletedURLs }; }); } /** * Returns a mapping of a precached URL to the corresponding cache key, taking * into account the revision information for the URL. * * @return {Map} A URL to cache key mapping. */ getURLsToCacheKeys() { return this._urlsToCacheKeys; } /** * Returns a list of all the URLs that have been precached by the current * service worker. * * @return {Array} The precached URLs. */ getCachedURLs() { return [...this._urlsToCacheKeys.keys()]; } /** * Returns the cache key used for storing a given URL. If that URL is * unversioned, like `/index.html', then the cache key will be the original * URL with a search parameter appended to it. * * @param {string} url A URL whose cache key you want to look up. * @return {string} The versioned URL that corresponds to a cache key * for the original URL, or undefined if that URL isn't precached. */ getCacheKeyForURL(url) { const urlObject = new URL(url, location.href); return this._urlsToCacheKeys.get(urlObject.href); } /** * @param {string} url A cache key whose SRI you want to look up. * @return {string} The subresource integrity associated with the cache key, * or undefined if it's not set. */ getIntegrityForCacheKey(cacheKey) { return this._cacheKeysToIntegrities.get(cacheKey); } /** * This acts as a drop-in replacement for * [`cache.match()`](https://developer.mozilla.org/en-US/docs/Web/API/Cache/match) * with the following differences: * * - It knows what the name of the precache is, and only checks in that cache. * - It allows you to pass in an "original" URL without versioning parameters, * and it will automatically look up the correct cache key for the currently * active revision of that URL. * * E.g., `matchPrecache('index.html')` will find the correct precached * response for the currently active service worker, even if the actual cache * key is `'/index.html?__WB_REVISION__=1234abcd'`. * * @param {string|Request} request The key (without revisioning parameters) * to look up in the precache. * @return {Promise} */ async matchPrecache(request) { const url = request instanceof Request ? request.url : request; const cacheKey = this.getCacheKeyForURL(url); if (cacheKey) { const cache = await self.caches.open(this.strategy.cacheName); return cache.match(cacheKey); } return undefined; } /** * Returns a function that looks up `url` in the precache (taking into * account revision information), and returns the corresponding `Response`. * * @param {string} url The precached URL which will be used to lookup the * `Response`. * @return {workbox-routing~handlerCallback} */ createHandlerBoundToURL(url) { const cacheKey = this.getCacheKeyForURL(url); if (!cacheKey) { throw new WorkboxError('non-precached-url', { url }); } return options => { options.request = new Request(url); options.params = Object.assign({ cacheKey }, options.params); return this.strategy.handle(options); }; } } /* Copyright 2019 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. */ let precacheController; /** * @return {PrecacheController} * @private */ const getOrCreatePrecacheController = () => { if (!precacheController) { precacheController = new PrecacheController(); } return precacheController; }; /* 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. */ /** * Removes any URL search parameters that should be ignored. * * @param {URL} urlObject The original URL. * @param {Array} ignoreURLParametersMatching RegExps to test against * each search parameter name. Matches mean that the search parameter should be * ignored. * @return {URL} The URL with any ignored search parameters removed. * * @private * @memberof workbox-precaching */ function removeIgnoredSearchParams(urlObject, ignoreURLParametersMatching = []) { // Convert the iterable into an array at the start of the loop to make sure // deletion doesn't mess up iteration. for (const paramName of [...urlObject.searchParams.keys()]) { if (ignoreURLParametersMatching.some(regExp => regExp.test(paramName))) { urlObject.searchParams.delete(paramName); } } return urlObject; } /* Copyright 2019 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. */ /** * Generator function that yields possible variations on the original URL to * check, one at a time. * * @param {string} url * @param {Object} options * * @private * @memberof workbox-precaching */ function* generateURLVariations(url, { ignoreURLParametersMatching = [/^utm_/, /^fbclid$/], directoryIndex = 'index.html', cleanURLs = true, urlManipulation } = {}) { const urlObject = new URL(url, location.href); urlObject.hash = ''; yield urlObject.href; const urlWithoutIgnoredParams = removeIgnoredSearchParams(urlObject, ignoreURLParametersMatching); yield urlWithoutIgnoredParams.href; if (directoryIndex && urlWithoutIgnoredParams.pathname.endsWith('/')) { const directoryURL = new URL(urlWithoutIgnoredParams.href); directoryURL.pathname += directoryIndex; yield directoryURL.href; } if (cleanURLs) { const cleanURL = new URL(urlWithoutIgnoredParams.href); cleanURL.pathname += '.html'; yield cleanURL.href; } if (urlManipulation) { const additionalURLs = urlManipulation({ url: urlObject }); for (const urlToAttempt of additionalURLs) { yield urlToAttempt.href; } } } /* Copyright 2020 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. */ /** * A subclass of {@link workbox-routing.Route} that takes a * {@link workbox-precaching.PrecacheController} * instance and uses it to match incoming requests and handle fetching * responses from the precache. * * @memberof workbox-precaching * @extends workbox-routing.Route */ class PrecacheRoute extends Route { /** * @param {PrecacheController} precacheController A `PrecacheController` * instance used to both match requests and respond to fetch events. * @param {Object} [options] Options to control how requests are matched * against the list of precached URLs. * @param {string} [options.directoryIndex=index.html] The `directoryIndex` will * check cache entries for a URLs ending with '/' to see if there is a hit when * appending the `directoryIndex` value. * @param {Array} [options.ignoreURLParametersMatching=[/^utm_/, /^fbclid$/]] An * array of regex's to remove search params when looking for a cache match. * @param {boolean} [options.cleanURLs=true] The `cleanURLs` option will * check the cache for the URL with a `.html` added to the end of the end. * @param {workbox-precaching~urlManipulation} [options.urlManipulation] * This is a function that should take a URL and return an array of * alternative URLs that should be checked for precache matches. */ constructor(precacheController, options) { const match = ({ request }) => { const urlsToCacheKeys = precacheController.getURLsToCacheKeys(); for (const possibleURL of generateURLVariations(request.url, options)) { const cacheKey = urlsToCacheKeys.get(possibleURL); if (cacheKey) { const integrity = precacheController.getIntegrityForCacheKey(cacheKey); return { cacheKey, integrity }; } } { logger.debug(`Precaching did not find a match for ` + getFriendlyURL(request.url)); } return; }; super(match, precacheController.strategy); } } /* Copyright 2019 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. */ /** * Add a `fetch` listener to the service worker that will * respond to * [network requests]{@link https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers#Custom_responses_to_requests} * with precached assets. * * Requests for assets that aren't precached, the `FetchEvent` will not be * responded to, allowing the event to fall through to other `fetch` event * listeners. * * @param {Object} [options] See the {@link workbox-precaching.PrecacheRoute} * options. * * @memberof workbox-precaching */ function addRoute(options) { const precacheController = getOrCreatePrecacheController(); const precacheRoute = new PrecacheRoute(precacheController, options); registerRoute(precacheRoute); } /* Copyright 2019 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. */ /** * Adds items to the precache list, removing any duplicates and * stores the files in the * {@link workbox-core.cacheNames|"precache cache"} when the service * worker installs. * * This method can be called multiple times. * * Please note: This method **will not** serve any of the cached files for you. * It only precaches files. To respond to a network request you call * {@link workbox-precaching.addRoute}. * * If you have a single array of files to precache, you can just call * {@link workbox-precaching.precacheAndRoute}. * * @param {Array} [entries=[]] Array of entries to precache. * * @memberof workbox-precaching */ function precache(entries) { const precacheController = getOrCreatePrecacheController(); precacheController.precache(entries); } /* Copyright 2019 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. */ /** * This method will add entries to the precache list and add a route to * respond to fetch events. * * This is a convenience method that will call * {@link workbox-precaching.precache} and * {@link workbox-precaching.addRoute} in a single call. * * @param {Array} entries Array of entries to precache. * @param {Object} [options] See the * {@link workbox-precaching.PrecacheRoute} options. * * @memberof workbox-precaching */ function precacheAndRoute(entries, options) { precache(entries); addRoute(options); } /* 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. */ const SUBSTRING_TO_FIND = '-precache-'; /** * Cleans up incompatible precaches that were created by older versions of * Workbox, by a service worker registered under the current scope. * * This is meant to be called as part of the `activate` event. * * This should be safe to use as long as you don't include `substringToFind` * (defaulting to `-precache-`) in your non-precache cache names. * * @param {string} currentPrecacheName The cache name currently in use for * precaching. This cache won't be deleted. * @param {string} [substringToFind='-precache-'] Cache names which include this * substring will be deleted (excluding `currentPrecacheName`). * @return {Array} A list of all the cache names that were deleted. * * @private * @memberof workbox-precaching */ const deleteOutdatedCaches = async (currentPrecacheName, substringToFind = SUBSTRING_TO_FIND) => { const cacheNames = await self.caches.keys(); const cacheNamesToDelete = cacheNames.filter(cacheName => { return cacheName.includes(substringToFind) && cacheName.includes(self.registration.scope) && cacheName !== currentPrecacheName; }); await Promise.all(cacheNamesToDelete.map(cacheName => self.caches.delete(cacheName))); return cacheNamesToDelete; }; /* Copyright 2019 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. */ /** * Adds an `activate` event listener which will clean up incompatible * precaches that were created by older versions of Workbox. * * @memberof workbox-precaching */ function cleanupOutdatedCaches() { // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705 self.addEventListener('activate', event => { const cacheName = cacheNames.getPrecacheName(); event.waitUntil(deleteOutdatedCaches(cacheName).then(cachesDeleted => { { if (cachesDeleted.length > 0) { logger.log(`The following out-of-date precaches were cleaned up ` + `automatically:`, cachesDeleted); } } })); }); } /* 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. */ /** * NavigationRoute makes it easy to create a * {@link workbox-routing.Route} that matches for browser * [navigation requests]{@link https://developers.google.com/web/fundamentals/primers/service-workers/high-performance-loading#first_what_are_navigation_requests}. * * It will only match incoming Requests whose * {@link https://fetch.spec.whatwg.org/#concept-request-mode|mode} * is set to `navigate`. * * You can optionally only apply this route to a subset of navigation requests * by using one or both of the `denylist` and `allowlist` parameters. * * @memberof workbox-routing * @extends workbox-routing.Route */ class NavigationRoute extends Route { /** * If both `denylist` and `allowlist` are provided, the `denylist` will * take precedence and the request will not match this route. * * The regular expressions in `allowlist` and `denylist` * are matched against the concatenated * [`pathname`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/pathname} * and [`search`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/search} * portions of the requested URL. * * *Note*: These RegExps may be evaluated against every destination URL during * a navigation. Avoid using * [complex RegExps](https://github.com/GoogleChrome/workbox/issues/3077), * or else your users may see delays when navigating your site. * * @param {workbox-routing~handlerCallback} handler A callback * function that returns a Promise resulting in a Response. * @param {Object} options * @param {Array} [options.denylist] If any of these patterns match, * the route will not handle the request (even if a allowlist RegExp matches). * @param {Array} [options.allowlist=[/./]] If any of these patterns * match the URL's pathname and search parameter, the route will handle the * request (assuming the denylist doesn't match). */ constructor(handler, { allowlist = [/./], denylist = [] } = {}) { { finalAssertExports.isArrayOfClass(allowlist, RegExp, { moduleName: 'workbox-routing', className: 'NavigationRoute', funcName: 'constructor', paramName: 'options.allowlist' }); finalAssertExports.isArrayOfClass(denylist, RegExp, { moduleName: 'workbox-routing', className: 'NavigationRoute', funcName: 'constructor', paramName: 'options.denylist' }); } super(options => this._match(options), handler); this._allowlist = allowlist; this._denylist = denylist; } /** * Routes match handler. * * @param {Object} options * @param {URL} options.url * @param {Request} options.request * @return {boolean} * * @private */ _match({ url, request }) { if (request && request.mode !== 'navigate') { return false; } const pathnameAndSearch = url.pathname + url.search; for (const regExp of this._denylist) { if (regExp.test(pathnameAndSearch)) { { logger.log(`The navigation route ${pathnameAndSearch} is not ` + `being used, since the URL matches this denylist pattern: ` + `${regExp.toString()}`); } return false; } } if (this._allowlist.some(regExp => regExp.test(pathnameAndSearch))) { { logger.debug(`The navigation route ${pathnameAndSearch} ` + `is being used.`); } return true; } { logger.log(`The navigation route ${pathnameAndSearch} is not ` + `being used, since the URL being navigated to doesn't ` + `match the allowlist.`); } return false; } } /* Copyright 2019 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. */ /** * Helper function that calls * {@link PrecacheController#createHandlerBoundToURL} on the default * {@link PrecacheController} instance. * * If you are creating your own {@link PrecacheController}, then call the * {@link PrecacheController#createHandlerBoundToURL} on that instance, * instead of using this function. * * @param {string} url The precached URL which will be used to lookup the * `Response`. * @param {boolean} [fallbackToNetwork=true] Whether to attempt to get the * response from the network if there's a precache miss. * @return {workbox-routing~handlerCallback} * * @memberof workbox-precaching */ function createHandlerBoundToURL(url) { const precacheController = getOrCreatePrecacheController(); return precacheController.createHandlerBoundToURL(url); } exports.NavigationRoute = NavigationRoute; exports.NetworkFirst = NetworkFirst; exports.cleanupOutdatedCaches = cleanupOutdatedCaches; exports.clientsClaim = clientsClaim; exports.createHandlerBoundToURL = createHandlerBoundToURL; exports.precacheAndRoute = precacheAndRoute; exports.registerRoute = registerRoute; }));