define("./workbox-6b19f60b.js",['exports'], function (exports) { 'use strict'; try { self['workbox:core:6.1.5'] && _(); } 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 self)) { self.__WB_DISABLE_DEV_LOGS = false; } let inGroup = false; const methodToColorMap = { debug: `#7f8c8d`, log: `#2ecc71`, warn: `#f39c12`, error: `#c0392b`, groupCollapsed: `#3498db`, groupEnd: null }; 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; } }; 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.`); } return `The parameter '${paramName}' passed into ` + `'${moduleName}.${className ? className + '.' : ''}` + `${funcName}()' must be of type ${expectedType}.`; }, 'incorrect-class': ({ expectedClass, paramName, moduleName, className, funcName, isReturnValueProblem }) => { if (!expectedClass || !moduleName || !funcName) { throw new Error(`Unexpected input to 'incorrect-class' error.`); } if (isReturnValueProblem) { return `The return value from ` + `'${moduleName}.${className ? className + '.' : ''}${funcName}()' ` + `must be an instance of class ${expectedClass.name}.`; } return `The parameter '${paramName}' passed into ` + `'${moduleName}.${className ? className + '.' : ''}${funcName}()' ` + `must be an instance of class ${expectedClass.name}.`; }, 'missing-a-method': ({ expectedMethod, paramName, moduleName, className, funcName }) => { if (!expectedMethod || !paramName || !moduleName || !className || !funcName) { throw new Error(`Unexpected input to 'missing-a-method' error.`); } return `${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._entryId} 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': ({ thrownError }) => { if (!thrownError) { 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: '${thrownError.message}'.`; }, 'invalid-cache-name': ({ cacheNameId, value }) => { if (!cacheNameId) { throw new Error(`Expected a 'cacheNameId' for error 'invalid-cache-name'`); } return `You must provide a name containing at least one character for ` + `setCacheDetails({${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}.`; } }; /* 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, expectedClass, details) => { if (!(object instanceof expectedClass)) { details['expectedClass'] = expectedClass; 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, expectedClass, 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 }; try { self['workbox:routing:6.1.5'] && _(); } 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 module:workbox-routing */ class Route { /** * Constructor for Route class. * * @param {module:workbox-routing~matchCallback} match * A callback function that determines whether the route matches a given * `fetch` event by returning a non-falsy value. * @param {module: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 {module: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 * [Route]{@link module: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. * * [See the module docs for info.]{@link https://developers.google.com/web/tools/workbox/modules/workbox-routing} * * @memberof module:workbox-routing * @extends module: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 * [handler's]{@link module:workbox-routing~handlerCallback} `params` * argument. * * @param {RegExp} regExp The regular expression to match against URLs. * @param {module: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}' only partially matched ` + `against the cross-origin URL '${url}'. RegExpRoute's will only ` + `handle cross-origin requests if they match the entire URL.`); } return; } // If the route matches, but there aren't any capture groups defined, then // this will return [], which is truthy and therefore sufficient to // indicate a match. // If there are capture groups, then it will return their values. return result.slice(1); }; super(match, handler, method); } } /* Copyright 2018 Google LLC Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at https://opensource.org/licenses/MIT. */ const getFriendlyURL = url => { const urlObj = new URL(String(url), location.href); // See https://github.com/GoogleChrome/workbox/issues/2323 // We want to include everything, except for the origin if it's same-origin. return urlObj.href.replace(new RegExp(`^${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 through one or more * [Routes]{@link module:workbox-routing.Route} responding with a Request 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 module: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 => { if (event.data && event.data.type === 'CACHE_URLS') { 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]) { 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) { 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; 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 params = matchResult; if (Array.isArray(matchResult) && matchResult.length === 0) { // Instead of passing an empty array in as params, use undefined. params = undefined; } else if (matchResult.constructor === Object && 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 {module: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 {module: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 {module: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 {module: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 [registerRoute()]{@link module:workbox-routing.Router#registerRoute}. * * @param {RegExp|string|module:workbox-routing.Route~matchCallback|module:workbox-routing.Route} capture * If the capture param is a `Route`, all other arguments will be ignored. * @param {module: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 {module:workbox-routing.Route} The generated `Route`(Useful for * unregistering). * * @memberof module: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}. 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; } try { self['workbox:strategies:6.1.5'] && _(); } 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; } }; function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); } 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 = _extends({}, 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. */ 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 module: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)); } function toRequest(input) { return typeof input === 'string' ? new Request(input) : input; } /** * A class created every time a Strategy instance instance calls * [handle()]{@link module:workbox-strategies.Strategy~handle} or * [handleAll()]{@link module: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 module: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 {module: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] * [match callback]{@link module: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 module:workbox-strategies.StrategyHandler */ /** * The event associated with this request. * @name event * @instance * @type {ExtendableEvent} * @memberof module: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 module: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 * [match callback]{@link module:workbox-routing~matchCallback} returned * a truthy value (it will be that value). * @name params * @instance * @type {*|undefined} * @memberof module: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) { throw new WorkboxError('plugin-error-request-will-fetch', { thrownError: err }); } // 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 ` + `'${getFriendlyURL(request.url)}' threw an error.`, error); } // `originalRequest` will only exist if a `fetchDidFail` callback // is being used (see above). if (originalRequest) { await this.runCallbacks('fetchDidFail', { error, event, originalRequest: originalRequest.clone(), request: pluginFilteredRequest.clone() }); } throw error; } } /** * Calls `this.fetch()` and (in the background) runs `this.cachePut()` on * the response generated by `this.fetch()`. * * The call to `this.cachePut()` automatically invokes `this.waitUntil()`, * so you do not have to manually call `waitUntil()` on the event. * * @param {Request|string} input The request or URL to fetch and cache. * @return {Promise} */ async fetchAndCachePut(input) { const response = await this.fetch(input); const responseClone = response.clone(); this.waitUntil(this.cachePut(input, responseClone)); return response; } /** * Matches a request from the cache (and invokes any applicable plugin * callback methods) using the `cacheName`, `matchOptions`, and `plugins` * defined on the strategy object. * * The following plugin lifecycle methods are invoked when using this method: * - cacheKeyWillByUsed() * - cachedResponseWillByUsed() * * @param {Request|string} key The Request or URL to use as the cache key. * @return {Promise} A matching response, if found. */ async cacheMatch(key) { const request = toRequest(key); let cachedResponse; const { cacheName, matchOptions } = this._strategy; const effectiveRequest = await this.getCacheKey(request, 'read'); const multiMatchOptions = _extends({}, matchOptions, { cacheName }); cachedResponse = await caches.match(effectiveRequest, multiMatchOptions); { if (cachedResponse) { logger.debug(`Found a cached response in '${cacheName}'.`); } else { logger.debug(`No cached response found in '${cacheName}'.`); } } for (const callback of this.iterateCallbacks('cachedResponseWillBeUsed')) { cachedResponse = (await callback({ cacheName, matchOptions, cachedResponse, request: effectiveRequest, event: this.event })) || undefined; } return cachedResponse; } /** * Puts a request/response pair in the cache (and invokes any applicable * plugin callback methods) using the `cacheName` and `plugins` defined on * the strategy object. * * The following plugin lifecycle methods are invoked when using this method: * - cacheKeyWillByUsed() * - cacheWillUpdate() * - cacheDidUpdate() * * @param {Request|string} key The request or URL to use as the cache key. * @param {Response} response The response to cache. * @return {Promise} `false` if a cacheWillUpdate caused the response * not be cached, and `true` otherwise. */ async cachePut(key, response) { const request = toRequest(key); // Run in the next task to avoid blocking other cache reads. // https://github.com/w3c/ServiceWorker/issues/1397 await timeout(0); const effectiveRequest = await this.getCacheKey(request, 'write'); { if (effectiveRequest.method && effectiveRequest.method !== 'GET') { throw new WorkboxError('attempt-to-cache-non-get-request', { url: getFriendlyURL(effectiveRequest.url), method: effectiveRequest.method }); } } if (!response) { { logger.error(`Cannot cache non-existent response for ` + `'${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) { // 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) { if (!this._cacheKeys[mode]) { let effectiveRequest = request; for (const callback of this.iterateCallbacks('cacheKeyWillBeUsed')) { effectiveRequest = toRequest(await callback({ mode, request: effectiveRequest, event: this.event, params: this.params })); } this._cacheKeys[mode] = effectiveRequest; } return this._cacheKeys[mode]; } /** * 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 * [`iterateCallbacks()`]{@link module: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 = _extends({}, 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 * [`doneWaiting()`]{@link module: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 * [`waitUntil()`]{@link module: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(); } /** * 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 module: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 * [workbox-core]{@link module:workbox-core.cacheNames}. * @param {Array} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins} * to use in conjunction with this caching strategy. * @param {Object} [options.fetchOptions] Values passed along to the * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters) * of [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 * [workbox-core]{@link module: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 * [route]{@link module: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 [`handle()`]{@link module: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) { 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} 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) { error = waitUntilError; } await handler.runCallbacks('handlerDidComplete', { event, request, response, error }); handler.destroy(); if (error) { throw error; } } } /** * Classes extending the `Strategy` based class should implement this method, * and leverage the [`handler`]{@link module: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 {module:workbox-strategies.StrategyHandler} handler * @return {Promise} * * @memberof module: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]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#network-falling-back-to-cache} * request strategy. * * By default, this strategy will cache responses with a 200 status code as * well as [opaque responses]{@link https://developers.google.com/web/tools/workbox/guides/handle-third-party-requests}. * Opaque responses are are cross-origin requests where the response doesn't * support [CORS]{@link https://enable-cors.org/}. * * If the network request fails, and there is no cache match, this will throw * a `WorkboxError` exception. * * @extends module:workbox-strategies.Strategy * @memberof module: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 * [workbox-core]{@link module:workbox-core.cacheNames}. * @param {Array} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins} * to use in conjunction with this caching strategy. * @param {Object} [options.fetchOptions] Values passed along to the * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters) * of [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 {module: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 ` + `${this._networkTimeoutSeconds} seconds.`); } resolve(await handler.cacheMatch(request)); }; timeoutId = setTimeout(onNetworkTimeout, this._networkTimeoutSeconds * 1000); }); return { promise: timeoutPromise, id: timeoutId }; } /** * @param {Object} options * @param {number|undefined} options.timeoutId * @param {Request} options.request * @param {Array} options.logs A reference to the logs Array. * @param {Event} options.event * @return {Promise} * * @private */ async _getNetworkPromise({ timeoutId, request, logs, handler }) { let error; let response; try { response = await handler.fetchAndCachePut(request); } catch (fetchError) { error = fetchError; } if (timeoutId) { clearTimeout(timeoutId); } { if (response) { logs.push(`Got response from network.`); } else { logs.push(`Unable to get a response from the network. Will respond ` + `with a cached response.`); } } if (error || !response) { response = await handler.cacheMatch(request); { if (response) { logs.push(`Found a cached response in the '${this.cacheName}'` + ` cache.`); } else { logs.push(`No response found in the '${this.cacheName}' cache.`); } } } return response; } } /* Copyright 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-only]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#network-only} * request strategy. * * This class is useful if you want to take advantage of any * [Workbox plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}. * * If the network request fails, this will throw a `WorkboxError` exception. * * @extends module:workbox-strategies.Strategy * @memberof module:workbox-strategies */ class NetworkOnly extends Strategy { /** * @param {Object} [options] * @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 {number} [options.networkTimeoutSeconds] If set, any network requests * that fail to respond within the timeout will result in a network error. */ constructor(options = {}) { super(options); this._networkTimeoutSeconds = options.networkTimeoutSeconds || 0; } /** * @private * @param {Request|string} request A request to run this strategy for. * @param {module:workbox-strategies.StrategyHandler} handler The event that * triggered the request. * @return {Promise} */ async _handle(request, handler) { { finalAssertExports.isInstance(request, Request, { moduleName: 'workbox-strategies', className: this.constructor.name, funcName: '_handle', paramName: 'request' }); } let error = undefined; let response; try { const promises = [handler.fetch(request)]; if (this._networkTimeoutSeconds) { const timeoutPromise = timeout(this._networkTimeoutSeconds * 1000); promises.push(timeoutPromise); } response = await Promise.race(promises); if (!response) { throw new Error(`Timed out the network response after ` + `${this._networkTimeoutSeconds} seconds.`); } } catch (err) { error = err; } { logger.groupCollapsed(messages.strategyStart(this.constructor.name, request)); if (response) { logger.log(`Got response from network.`); } else { logger.log(`Unable to get a response from the network.`); } messages.printFinalResponse(response); logger.groupEnd(); } if (!response) { throw new WorkboxError('no-response', { url: request.url, error }); } return response; } } /* 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 module:workbox-core */ function clientsClaim() { self.addEventListener('activate', () => self.clients.claim()); } exports.NetworkFirst = NetworkFirst; exports.NetworkOnly = NetworkOnly; exports.clientsClaim = clientsClaim; exports.registerRoute = registerRoute; }); //# sourceMappingURL=workbox-6b19f60b.js.map