forked from mirrors/gecko-dev
42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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let knownConfigs = new Map();
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export class HPKEConfigManager {
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static async get(aURL, aOptions = {}) {
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try {
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let config = await this.#getInternal(aURL, aOptions);
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return new Uint8Array(config);
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} catch (ex) {
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console.error(ex);
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return null;
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}
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}
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static async #getInternal(aURL, aOptions = {}) {
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let { maxAge = -1 } = aOptions;
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let knownConfig = knownConfigs.get(aURL);
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if (
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knownConfig &&
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(maxAge < 0 || Date.now() - knownConfig.fetchDate < maxAge)
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) {
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return knownConfig.config;
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}
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return this.fetchAndStore(aURL, aOptions);
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}
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static async fetchAndStore(aURL, aOptions = {}) {
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let fetchDate = Date.now();
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let resp = await fetch(aURL, { signal: aOptions.abortSignal });
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if (!resp?.ok) {
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throw new Error(
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`Fetching HPKE config from ${aURL} failed with error ${resp.status}`
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);
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}
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let config = await resp.blob().then(b => b.arrayBuffer());
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knownConfigs.set(aURL, { config, fetchDate });
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return config;
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}
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}
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