37 lines
1.1 KiB
TypeScript
37 lines
1.1 KiB
TypeScript
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import type { RequestHandler } from './$types';
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import { error } from '@sveltejs/kit';
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import { createReadStream, existsSync, statSync } from 'node:fs';
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import { join, basename, extname } from 'node:path';
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const IMAGE_DIR = process.env.IMAGE_DIR ?? './data/images';
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const MIME: Record<string, string> = {
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'.jpg': 'image/jpeg',
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'.jpeg': 'image/jpeg',
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'.png': 'image/png',
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'.webp': 'image/webp',
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'.gif': 'image/gif',
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'.avif': 'image/avif'
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};
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export const GET: RequestHandler = ({ params }) => {
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const filename = basename(params.filename ?? '');
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if (!filename || filename.includes('..')) error(400, { message: 'Invalid filename' });
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const full = join(IMAGE_DIR, filename);
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if (!existsSync(full)) error(404, { message: 'Not found' });
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const st = statSync(full);
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const ext = extname(filename).toLowerCase();
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const mime = MIME[ext] ?? 'application/octet-stream';
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const stream = createReadStream(full);
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return new Response(stream as unknown as ReadableStream, {
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status: 200,
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headers: {
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'content-type': mime,
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'content-length': String(st.size),
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'cache-control': 'public, max-age=86400, immutable'
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}
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});
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};
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