79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
/*
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Copyright 2017 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import '../_version.mjs';
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/**
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* Used as a consistent way of referencing a URL to precache.
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*
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* @private
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* @memberof module:workbox-precaching
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*/
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export default class PrecacheEntry {
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/**
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* This class ensures all cache list entries are consistent and
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* adds cache busting if required.
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*
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* @param {*} originalInput
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* @param {string} url
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* @param {string} revision
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* @param {boolean} shouldCacheBust
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*/
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constructor(originalInput, url, revision, shouldCacheBust) {
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this._originalInput = originalInput;
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this._entryId = url;
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this._revision = revision;
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const requestAsCacheKey = new Request(url, {credentials: 'same-origin'});
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this._cacheRequest = requestAsCacheKey;
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this._networkRequest = shouldCacheBust ?
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this._cacheBustRequest(requestAsCacheKey) : requestAsCacheKey;
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}
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/**
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* This method will either use Request.cache option OR append a cache
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* busting parameter to the URL.
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*
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* @param {Request} request The request to cache bust
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* @return {Request} A cachebusted Request
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*
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* @private
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*/
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_cacheBustRequest(request) {
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let url = request.url;
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const requestOptions = {
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credentials: 'same-origin',
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};
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if ('cache' in Request.prototype) {
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// Make use of the Request cache mode where we can.
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// Reload skips the HTTP cache for outgoing requests and updates
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// the cache with the returned response.
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requestOptions.cache = 'reload';
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} else {
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const parsedURL = new URL(url, location);
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// This is done so the minifier can mangle 'global.encodeURIComponent'
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const _encodeURIComponent = encodeURIComponent;
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parsedURL.search += (parsedURL.search ? '&' : '') +
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_encodeURIComponent(`_workbox-cache-bust`) + '=' +
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_encodeURIComponent(this._revision);
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url = parsedURL.toString();
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}
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return new Request(url, requestOptions);
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}
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}
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