58 lines
1.7 KiB
TypeScript
58 lines
1.7 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import type {MiddlewareHandler} from 'hono';
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const CACHEABLE_CONTENT_TYPES = [
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'text/css',
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'application/javascript',
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'font/',
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'image/',
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'video/',
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'audio/',
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'application/font-woff2',
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];
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function shouldCache(contentType: string): boolean {
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return CACHEABLE_CONTENT_TYPES.some((type) => contentType.startsWith(type));
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}
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export interface CacheHeadersOptions {
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staticCacheControl?: string;
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defaultCacheControl?: string;
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}
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export function cacheHeaders(options: CacheHeadersOptions = {}): MiddlewareHandler {
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const {staticCacheControl = 'public, max-age=31536000, immutable', defaultCacheControl = 'no-cache'} = options;
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return async (c, next) => {
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await next();
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const existingCacheControl = c.res.headers.get('Cache-Control');
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if (existingCacheControl) {
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return;
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}
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const contentType = c.res.headers.get('Content-Type') || '';
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const cacheHeader = shouldCache(contentType) ? staticCacheControl : defaultCacheControl;
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c.res.headers.set('Cache-Control', cacheHeader);
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};
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}
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