69 lines
2.3 KiB
JavaScript
69 lines
2.3 KiB
JavaScript
/*
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Copyright 2016 Google Inc. All Rights Reserved.
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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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http://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 {WorkboxError} from 'workbox-core/_private/WorkboxError.mjs';
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import {logger} from 'workbox-core/_private/logger.mjs';
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import '../_version.mjs';
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/**
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* Given two `Response's`, compares several header values to see if they are
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* the same or not.
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*
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* @param {Response} firstResponse
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* @param {Response} secondResponse
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* @param {Array<string>} headersToCheck
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* @return {boolean}
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*
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* @memberof workbox.broadcastUpdate
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* @private
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*/
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const responsesAreSame = (firstResponse, secondResponse, headersToCheck) => {
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if (process.env.NODE_ENV !== 'production') {
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if (!(firstResponse instanceof Response &&
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secondResponse instanceof Response)) {
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throw new WorkboxError('invalid-responses-are-same-args');
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}
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}
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const atLeastOneHeaderAvailable = headersToCheck.some((header) => {
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return firstResponse.headers.has(header) &&
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secondResponse.headers.has(header);
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});
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if (!atLeastOneHeaderAvailable) {
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if (process.env.NODE_ENV !== 'production') {
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logger.warn(`Unable to determine where the response has been updated ` +
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`because none of the headers that would be checked are present.`);
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logger.debug(`Attempting to compare the following: `,
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firstResponse, secondResponse, headersToCheck);
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}
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// Just return true, indicating the that responses are the same, since we
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// can't determine otherwise.
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return true;
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}
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return headersToCheck.every((header) => {
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const headerStateComparison = firstResponse.headers.has(header) ===
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secondResponse.headers.has(header);
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const headerValueComparison = firstResponse.headers.get(header) ===
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secondResponse.headers.get(header);
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return headerStateComparison && headerValueComparison;
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});
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};
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export {responsesAreSame};
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