forked from mystiq/hydrogen-web
38 lines
1.4 KiB
JavaScript
38 lines
1.4 KiB
JavaScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Copyright 2020 The Matrix.org Foundation C.I.C.
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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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export function addCacheBuster(urlStr, random = Math.random) {
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// XHR doesn't have a good way to disable cache,
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// so add a random query param
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// see https://davidtranscend.com/blog/prevent-ie11-cache-ajax-requests/
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if (urlStr.includes("?")) {
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urlStr = urlStr + "&";
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} else {
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urlStr = urlStr + "?";
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}
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return urlStr + `_cacheBuster=${Math.ceil(random() * Number.MAX_SAFE_INTEGER)}`;
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}
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export function tests() {
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return {
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"add cache buster": assert => {
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const random = () => 0.5;
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assert.equal(addCacheBuster("http://foo", random), "http://foo?_cacheBuster=4503599627370496");
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assert.equal(addCacheBuster("http://foo?bar=baz", random), "http://foo?bar=baz&_cacheBuster=4503599627370496");
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}
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}
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}
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