mirror of https://github.com/jkjoy/sunpeiwen.git
1510 lines
53 KiB
JavaScript
1510 lines
53 KiB
JavaScript
this.workbox = this.workbox || {};
|
|
this.workbox.strategies = (function (exports, assert_js, logger_js, WorkboxError_js, cacheNames_js, getFriendlyURL_js, cacheMatchIgnoreParams_js, Deferred_js, executeQuotaErrorCallbacks_js, timeout_js) {
|
|
'use strict';
|
|
|
|
try {
|
|
self['workbox:strategies:6.5.3'] && _();
|
|
} catch (e) {}
|
|
|
|
/*
|
|
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
|
|
*/
|
|
|
|
{
|
|
assert_js.assert.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_js.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<Response>}
|
|
*/
|
|
|
|
|
|
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_js.logger.log(`Using a preloaded navigation response for ` + `'${getFriendlyURL_js.getFriendlyURL(request.url)}'`);
|
|
}
|
|
|
|
return possiblePreloadResponse;
|
|
}
|
|
} // If there is a fetchDidFail plugin, we need to save a clone of the
|
|
// original request before it's either modified by a requestWillFetch
|
|
// plugin or before the original request's body is consumed via fetch().
|
|
|
|
|
|
const originalRequest = this.hasCallback('fetchDidFail') ? request.clone() : null;
|
|
|
|
try {
|
|
for (const cb of this.iterateCallbacks('requestWillFetch')) {
|
|
request = await cb({
|
|
request: request.clone(),
|
|
event
|
|
});
|
|
}
|
|
} catch (err) {
|
|
if (err instanceof Error) {
|
|
throw new WorkboxError_js.WorkboxError('plugin-error-request-will-fetch', {
|
|
thrownErrorMessage: err.message
|
|
});
|
|
}
|
|
} // The request can be altered by plugins with `requestWillFetch` making
|
|
// the original request (most likely from a `fetch` event) different
|
|
// from the Request we make. Pass both to `fetchDidFail` to aid debugging.
|
|
|
|
|
|
const pluginFilteredRequest = request.clone();
|
|
|
|
try {
|
|
let fetchResponse; // See https://github.com/GoogleChrome/workbox/issues/1796
|
|
|
|
fetchResponse = await fetch(request, request.mode === 'navigate' ? undefined : this._strategy.fetchOptions);
|
|
|
|
if ("dev" !== 'production') {
|
|
logger_js.logger.debug(`Network request for ` + `'${getFriendlyURL_js.getFriendlyURL(request.url)}' returned a response with ` + `status '${fetchResponse.status}'.`);
|
|
}
|
|
|
|
for (const callback of this.iterateCallbacks('fetchDidSucceed')) {
|
|
fetchResponse = await callback({
|
|
event,
|
|
request: pluginFilteredRequest,
|
|
response: fetchResponse
|
|
});
|
|
}
|
|
|
|
return fetchResponse;
|
|
} catch (error) {
|
|
{
|
|
logger_js.logger.log(`Network request for ` + `'${getFriendlyURL_js.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<Response>}
|
|
*/
|
|
|
|
|
|
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<Response|undefined>} 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_js.logger.debug(`Found a cached response in '${cacheName}'.`);
|
|
} else {
|
|
logger_js.logger.debug(`No cached response found in '${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<boolean>} `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_js.timeout(0);
|
|
const effectiveRequest = await this.getCacheKey(request, 'write');
|
|
|
|
{
|
|
if (effectiveRequest.method && effectiveRequest.method !== 'GET') {
|
|
throw new WorkboxError_js.WorkboxError('attempt-to-cache-non-get-request', {
|
|
url: getFriendlyURL_js.getFriendlyURL(effectiveRequest.url),
|
|
method: effectiveRequest.method
|
|
});
|
|
} // See https://github.com/GoogleChrome/workbox/issues/2818
|
|
|
|
|
|
const vary = response.headers.get('Vary');
|
|
|
|
if (vary) {
|
|
logger_js.logger.debug(`The response for ${getFriendlyURL_js.getFriendlyURL(effectiveRequest.url)} ` + `has a 'Vary: ${vary}' header. ` + `Consider setting the {ignoreVary: true} option on your strategy ` + `to ensure cache matching and deletion works as expected.`);
|
|
}
|
|
}
|
|
|
|
if (!response) {
|
|
{
|
|
logger_js.logger.error(`Cannot cache non-existent response for ` + `'${getFriendlyURL_js.getFriendlyURL(effectiveRequest.url)}'.`);
|
|
}
|
|
|
|
throw new WorkboxError_js.WorkboxError('cache-put-with-no-response', {
|
|
url: getFriendlyURL_js.getFriendlyURL(effectiveRequest.url)
|
|
});
|
|
}
|
|
|
|
const responseToCache = await this._ensureResponseSafeToCache(response);
|
|
|
|
if (!responseToCache) {
|
|
{
|
|
logger_js.logger.debug(`Response '${getFriendlyURL_js.getFriendlyURL(effectiveRequest.url)}' ` + `will not be cached.`, responseToCache);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
const {
|
|
cacheName,
|
|
matchOptions
|
|
} = this._strategy;
|
|
const cache = await self.caches.open(cacheName);
|
|
const hasCacheUpdateCallback = this.hasCallback('cacheDidUpdate');
|
|
const oldResponse = hasCacheUpdateCallback ? await cacheMatchIgnoreParams_js.cacheMatchIgnoreParams( // TODO(philipwalton): the `__WB_REVISION__` param is a precaching
|
|
// feature. Consider into ways to only add this behavior if using
|
|
// precaching.
|
|
cache, effectiveRequest.clone(), ['__WB_REVISION__'], matchOptions) : null;
|
|
|
|
{
|
|
logger_js.logger.debug(`Updating the '${cacheName}' cache with a new Response ` + `for ${getFriendlyURL_js.getFriendlyURL(effectiveRequest.url)}.`);
|
|
}
|
|
|
|
try {
|
|
await cache.put(effectiveRequest, hasCacheUpdateCallback ? responseToCache.clone() : responseToCache);
|
|
} catch (error) {
|
|
if (error instanceof Error) {
|
|
// See https://developer.mozilla.org/en-US/docs/Web/API/DOMException#exception-QuotaExceededError
|
|
if (error.name === 'QuotaExceededError') {
|
|
await executeQuotaErrorCallbacks_js.executeQuotaErrorCallbacks();
|
|
}
|
|
|
|
throw error;
|
|
}
|
|
}
|
|
|
|
for (const callback of this.iterateCallbacks('cacheDidUpdate')) {
|
|
await callback({
|
|
cacheName,
|
|
oldResponse,
|
|
newResponse: responseToCache.clone(),
|
|
request: effectiveRequest,
|
|
event: this.event
|
|
});
|
|
}
|
|
|
|
return true;
|
|
}
|
|
/**
|
|
* Checks the list of plugins for the `cacheKeyWillBeUsed` callback, and
|
|
* executes any of those callbacks found in sequence. The final `Request`
|
|
* object returned by the last plugin is treated as the cache key for cache
|
|
* reads and/or writes. If no `cacheKeyWillBeUsed` plugin callbacks have
|
|
* been registered, the passed request is returned unmodified
|
|
*
|
|
* @param {Request} request
|
|
* @param {string} mode
|
|
* @return {Promise<Request>}
|
|
*/
|
|
|
|
|
|
async getCacheKey(request, mode) {
|
|
const key = `${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<Function>}
|
|
*/
|
|
|
|
|
|
*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<Response|undefined>}
|
|
*
|
|
* @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_js.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_js.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<Object>} [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_js.cacheNames.getRuntimeName(options.cacheName);
|
|
/**
|
|
* The list
|
|
* [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
|
|
* used by this strategy.
|
|
*
|
|
* @type {Array<Object>}
|
|
*/
|
|
|
|
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<Promise>} 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_js.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_js.logger.log(`While responding to '${getFriendlyURL_js.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<Response>}
|
|
*
|
|
* @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_js.getFriendlyURL(request.url)}'`,
|
|
printFinalResponse: response => {
|
|
if (response) {
|
|
logger_js.logger.groupCollapsed(`View the final response here.`);
|
|
logger_js.logger.log(response || '[No response returned]');
|
|
logger_js.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 [cache-first](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#cache-first-falling-back-to-network)
|
|
* request strategy.
|
|
*
|
|
* A cache first strategy is useful for assets that have been revisioned,
|
|
* such as URLs like `/styles/example.a8f5f1.css`, since they
|
|
* can be cached for long periods of time.
|
|
*
|
|
* 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 CacheFirst extends Strategy {
|
|
/**
|
|
* @private
|
|
* @param {Request|string} request A request to run this strategy for.
|
|
* @param {workbox-strategies.StrategyHandler} handler The event that
|
|
* triggered the request.
|
|
* @return {Promise<Response>}
|
|
*/
|
|
async _handle(request, handler) {
|
|
const logs = [];
|
|
|
|
{
|
|
assert_js.assert.isInstance(request, Request, {
|
|
moduleName: 'workbox-strategies',
|
|
className: this.constructor.name,
|
|
funcName: 'makeRequest',
|
|
paramName: 'request'
|
|
});
|
|
}
|
|
|
|
let response = await handler.cacheMatch(request);
|
|
let error = undefined;
|
|
|
|
if (!response) {
|
|
{
|
|
logs.push(`No response found in the '${this.cacheName}' cache. ` + `Will respond with a network request.`);
|
|
}
|
|
|
|
try {
|
|
response = await handler.fetchAndCachePut(request);
|
|
} catch (err) {
|
|
if (err instanceof Error) {
|
|
error = err;
|
|
}
|
|
}
|
|
|
|
{
|
|
if (response) {
|
|
logs.push(`Got response from network.`);
|
|
} else {
|
|
logs.push(`Unable to get a response from the network.`);
|
|
}
|
|
}
|
|
} else {
|
|
{
|
|
logs.push(`Found a cached response in the '${this.cacheName}' cache.`);
|
|
}
|
|
}
|
|
|
|
{
|
|
logger_js.logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
|
|
|
|
for (const log of logs) {
|
|
logger_js.logger.log(log);
|
|
}
|
|
|
|
messages.printFinalResponse(response);
|
|
logger_js.logger.groupEnd();
|
|
}
|
|
|
|
if (!response) {
|
|
throw new WorkboxError_js.WorkboxError('no-response', {
|
|
url: request.url,
|
|
error
|
|
});
|
|
}
|
|
|
|
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 [cache-only](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#cache-only)
|
|
* request strategy.
|
|
*
|
|
* This class is useful if you want to take advantage of any
|
|
* [Workbox plugins](https://developer.chrome.com/docs/workbox/using-plugins/).
|
|
*
|
|
* If there is no cache match, this will throw a `WorkboxError` exception.
|
|
*
|
|
* @extends workbox-strategies.Strategy
|
|
* @memberof workbox-strategies
|
|
*/
|
|
|
|
class CacheOnly extends Strategy {
|
|
/**
|
|
* @private
|
|
* @param {Request|string} request A request to run this strategy for.
|
|
* @param {workbox-strategies.StrategyHandler} handler The event that
|
|
* triggered the request.
|
|
* @return {Promise<Response>}
|
|
*/
|
|
async _handle(request, handler) {
|
|
{
|
|
assert_js.assert.isInstance(request, Request, {
|
|
moduleName: 'workbox-strategies',
|
|
className: this.constructor.name,
|
|
funcName: 'makeRequest',
|
|
paramName: 'request'
|
|
});
|
|
}
|
|
|
|
const response = await handler.cacheMatch(request);
|
|
|
|
{
|
|
logger_js.logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
|
|
|
|
if (response) {
|
|
logger_js.logger.log(`Found a cached response in the '${this.cacheName}' ` + `cache.`);
|
|
messages.printFinalResponse(response);
|
|
} else {
|
|
logger_js.logger.log(`No response found in the '${this.cacheName}' cache.`);
|
|
}
|
|
|
|
logger_js.logger.groupEnd();
|
|
}
|
|
|
|
if (!response) {
|
|
throw new WorkboxError_js.WorkboxError('no-response', {
|
|
url: request.url
|
|
});
|
|
}
|
|
|
|
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.
|
|
*/
|
|
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.
|
|
*/
|
|
/**
|
|
* 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<Object>} [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) {
|
|
assert_js.assert.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<Response>}
|
|
*/
|
|
|
|
|
|
async _handle(request, handler) {
|
|
const logs = [];
|
|
|
|
{
|
|
assert_js.assert.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_js.logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
|
|
|
|
for (const log of logs) {
|
|
logger_js.logger.log(log);
|
|
}
|
|
|
|
messages.printFinalResponse(response);
|
|
logger_js.logger.groupEnd();
|
|
}
|
|
|
|
if (!response) {
|
|
throw new WorkboxError_js.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<Response>}
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
|
|
_getTimeoutPromise({
|
|
request,
|
|
logs,
|
|
handler
|
|
}) {
|
|
let timeoutId;
|
|
const timeoutPromise = new Promise(resolve => {
|
|
const onNetworkTimeout = async () => {
|
|
{
|
|
logs.push(`Timing out the network response at ` + `${this._networkTimeoutSeconds} seconds.`);
|
|
}
|
|
|
|
resolve(await handler.cacheMatch(request));
|
|
};
|
|
|
|
timeoutId = setTimeout(onNetworkTimeout, this._networkTimeoutSeconds * 1000);
|
|
});
|
|
return {
|
|
promise: timeoutPromise,
|
|
id: timeoutId
|
|
};
|
|
}
|
|
/**
|
|
* @param {Object} options
|
|
* @param {number|undefined} options.timeoutId
|
|
* @param {Request} options.request
|
|
* @param {Array} options.logs A reference to the logs Array.
|
|
* @param {Event} options.event
|
|
* @return {Promise<Response>}
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
|
|
async _getNetworkPromise({
|
|
timeoutId,
|
|
request,
|
|
logs,
|
|
handler
|
|
}) {
|
|
let error;
|
|
let response;
|
|
|
|
try {
|
|
response = await handler.fetchAndCachePut(request);
|
|
} catch (fetchError) {
|
|
if (fetchError instanceof Error) {
|
|
error = fetchError;
|
|
}
|
|
}
|
|
|
|
if (timeoutId) {
|
|
clearTimeout(timeoutId);
|
|
}
|
|
|
|
{
|
|
if (response) {
|
|
logs.push(`Got response from network.`);
|
|
} else {
|
|
logs.push(`Unable to get a response from the network. Will respond ` + `with a cached response.`);
|
|
}
|
|
}
|
|
|
|
if (error || !response) {
|
|
response = await handler.cacheMatch(request);
|
|
|
|
{
|
|
if (response) {
|
|
logs.push(`Found a cached response in the '${this.cacheName}'` + ` cache.`);
|
|
} else {
|
|
logs.push(`No response found in the '${this.cacheName}' cache.`);
|
|
}
|
|
}
|
|
}
|
|
|
|
return response;
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
Copyright 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](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#network-only)
|
|
* request strategy.
|
|
*
|
|
* This class is useful if you want to take advantage of any
|
|
* [Workbox plugins](https://developer.chrome.com/docs/workbox/using-plugins/).
|
|
*
|
|
* If the network request fails, this will throw a `WorkboxError` exception.
|
|
*
|
|
* @extends workbox-strategies.Strategy
|
|
* @memberof workbox-strategies
|
|
*/
|
|
|
|
class NetworkOnly extends Strategy {
|
|
/**
|
|
* @param {Object} [options]
|
|
* @param {Array<Object>} [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 {workbox-strategies.StrategyHandler} handler The event that
|
|
* triggered the request.
|
|
* @return {Promise<Response>}
|
|
*/
|
|
|
|
|
|
async _handle(request, handler) {
|
|
{
|
|
assert_js.assert.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_js.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) {
|
|
if (err instanceof Error) {
|
|
error = err;
|
|
}
|
|
}
|
|
|
|
{
|
|
logger_js.logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
|
|
|
|
if (response) {
|
|
logger_js.logger.log(`Got response from network.`);
|
|
} else {
|
|
logger_js.logger.log(`Unable to get a response from the network.`);
|
|
}
|
|
|
|
messages.printFinalResponse(response);
|
|
logger_js.logger.groupEnd();
|
|
}
|
|
|
|
if (!response) {
|
|
throw new WorkboxError_js.WorkboxError('no-response', {
|
|
url: request.url,
|
|
error
|
|
});
|
|
}
|
|
|
|
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
|
|
* [stale-while-revalidate](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#stale-while-revalidate)
|
|
* request strategy.
|
|
*
|
|
* Resources are requested from both the cache and the network in parallel.
|
|
* The strategy will respond with the cached version if available, otherwise
|
|
* wait for the network response. The cache is updated with the network response
|
|
* with each successful request.
|
|
*
|
|
* 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 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 StaleWhileRevalidate 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<Object>} [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)
|
|
*/
|
|
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);
|
|
}
|
|
}
|
|
/**
|
|
* @private
|
|
* @param {Request|string} request A request to run this strategy for.
|
|
* @param {workbox-strategies.StrategyHandler} handler The event that
|
|
* triggered the request.
|
|
* @return {Promise<Response>}
|
|
*/
|
|
|
|
|
|
async _handle(request, handler) {
|
|
const logs = [];
|
|
|
|
{
|
|
assert_js.assert.isInstance(request, Request, {
|
|
moduleName: 'workbox-strategies',
|
|
className: this.constructor.name,
|
|
funcName: 'handle',
|
|
paramName: 'request'
|
|
});
|
|
}
|
|
|
|
const fetchAndCachePromise = handler.fetchAndCachePut(request).catch(() => {// Swallow this error because a 'no-response' error will be thrown in
|
|
// main handler return flow. This will be in the `waitUntil()` flow.
|
|
});
|
|
void handler.waitUntil(fetchAndCachePromise);
|
|
let response = await handler.cacheMatch(request);
|
|
let error;
|
|
|
|
if (response) {
|
|
{
|
|
logs.push(`Found a cached response in the '${this.cacheName}'` + ` cache. Will update with the network response in the background.`);
|
|
}
|
|
} else {
|
|
{
|
|
logs.push(`No response found in the '${this.cacheName}' cache. ` + `Will wait for the network response.`);
|
|
}
|
|
|
|
try {
|
|
// NOTE(philipwalton): Really annoying that we have to type cast here.
|
|
// https://github.com/microsoft/TypeScript/issues/20006
|
|
response = await fetchAndCachePromise;
|
|
} catch (err) {
|
|
if (err instanceof Error) {
|
|
error = err;
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
logger_js.logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
|
|
|
|
for (const log of logs) {
|
|
logger_js.logger.log(log);
|
|
}
|
|
|
|
messages.printFinalResponse(response);
|
|
logger_js.logger.groupEnd();
|
|
}
|
|
|
|
if (!response) {
|
|
throw new WorkboxError_js.WorkboxError('no-response', {
|
|
url: request.url,
|
|
error
|
|
});
|
|
}
|
|
|
|
return response;
|
|
}
|
|
|
|
}
|
|
|
|
exports.CacheFirst = CacheFirst;
|
|
exports.CacheOnly = CacheOnly;
|
|
exports.NetworkFirst = NetworkFirst;
|
|
exports.NetworkOnly = NetworkOnly;
|
|
exports.StaleWhileRevalidate = StaleWhileRevalidate;
|
|
exports.Strategy = Strategy;
|
|
exports.StrategyHandler = StrategyHandler;
|
|
|
|
return exports;
|
|
|
|
}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
|
|
//# sourceMappingURL=workbox-strategies.dev.js.map
|