| 1 | /*
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| 2 | Copyright 2018 Google LLC
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| 3 |
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| 4 | Use of this source code is governed by an MIT-style
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| 5 | license that can be found in the LICENSE file or at
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| 6 | https://opensource.org/licenses/MIT.
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| 7 | */
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| 8 | import { WorkboxError } from 'workbox-core/_private/WorkboxError.js';
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| 9 | import '../_version.js';
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| 10 | // Name of the search parameter used to store revision info.
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| 11 | const REVISION_SEARCH_PARAM = '__WB_REVISION__';
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| 12 | /**
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| 13 | * Converts a manifest entry into a versioned URL suitable for precaching.
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| 14 | *
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| 15 | * @param {Object|string} entry
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| 16 | * @return {string} A URL with versioning info.
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| 17 | *
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| 18 | * @private
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| 19 | * @memberof workbox-precaching
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| 20 | */
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| 21 | export function createCacheKey(entry) {
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| 22 | if (!entry) {
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| 23 | throw new WorkboxError('add-to-cache-list-unexpected-type', { entry });
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| 24 | }
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| 25 | // If a precache manifest entry is a string, it's assumed to be a versioned
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| 26 | // URL, like '/app.abcd1234.js'. Return as-is.
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| 27 | if (typeof entry === 'string') {
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| 28 | const urlObject = new URL(entry, location.href);
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| 29 | return {
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| 30 | cacheKey: urlObject.href,
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| 31 | url: urlObject.href,
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| 32 | };
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| 33 | }
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| 34 | const { revision, url } = entry;
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| 35 | if (!url) {
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| 36 | throw new WorkboxError('add-to-cache-list-unexpected-type', { entry });
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| 37 | }
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| 38 | // If there's just a URL and no revision, then it's also assumed to be a
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| 39 | // versioned URL.
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| 40 | if (!revision) {
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| 41 | const urlObject = new URL(url, location.href);
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| 42 | return {
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| 43 | cacheKey: urlObject.href,
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| 44 | url: urlObject.href,
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| 45 | };
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| 46 | }
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| 47 | // Otherwise, construct a properly versioned URL using the custom Workbox
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| 48 | // search parameter along with the revision info.
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| 49 | const cacheKeyURL = new URL(url, location.href);
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| 50 | const originalURL = new URL(url, location.href);
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| 51 | cacheKeyURL.searchParams.set(REVISION_SEARCH_PARAM, revision);
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| 52 | return {
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| 53 | cacheKey: cacheKeyURL.href,
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| 54 | url: originalURL.href,
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| 55 | };
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| 56 | }
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