CacheOnly.js
3.47 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/*
Copyright 2018 Google LLC
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
import { assert } from 'workbox-core/_private/assert.js';
import { cacheNames } from 'workbox-core/_private/cacheNames.js';
import { cacheWrapper } from 'workbox-core/_private/cacheWrapper.js';
import { logger } from 'workbox-core/_private/logger.js';
import { WorkboxError } from 'workbox-core/_private/WorkboxError.js';
import { messages } from './utils/messages.js';
import './_version.js';
/**
* An implementation of a
* [cache-only]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#cache-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 there is no cache match, this will throw a `WorkboxError` exception.
*
* @memberof module:workbox-strategies
*/
class CacheOnly {
/**
* @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<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.matchOptions [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)
*/
constructor(options = {}) {
this._cacheName = cacheNames.getRuntimeName(options.cacheName);
this._plugins = options.plugins || [];
this._matchOptions = options.matchOptions;
}
/**
* This method will perform a request strategy and follows an API that
* will work with the
* [Workbox Router]{@link module:workbox-routing.Router}.
*
* @param {Object} options
* @param {Request|string} options.request A request to run this strategy for.
* @param {Event} [options.event] The event that triggered the request.
* @return {Promise<Response>}
*/
async handle({ event, request }) {
if (typeof request === 'string') {
request = new Request(request);
}
if (process.env.NODE_ENV !== 'production') {
assert.isInstance(request, Request, {
moduleName: 'workbox-strategies',
className: 'CacheOnly',
funcName: 'makeRequest',
paramName: 'request',
});
}
const response = await cacheWrapper.match({
cacheName: this._cacheName,
request,
event,
matchOptions: this._matchOptions,
plugins: this._plugins,
});
if (process.env.NODE_ENV !== 'production') {
logger.groupCollapsed(messages.strategyStart('CacheOnly', request));
if (response) {
logger.log(`Found a cached response in the '${this._cacheName}'` +
` cache.`);
messages.printFinalResponse(response);
}
else {
logger.log(`No response found in the '${this._cacheName}' cache.`);
}
logger.groupEnd();
}
if (!response) {
throw new WorkboxError('no-response', { url: request.url });
}
return response;
}
}
export { CacheOnly };