53 lines
1.3 KiB
TypeScript
53 lines
1.3 KiB
TypeScript
import type { APIRoute } from 'astro';
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import mime from 'mime';
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// @ts-ignore
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import loader from 'virtual:image-loader';
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import { etag } from './utils/etag.js';
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import { isRemoteImage } from './utils/paths.js';
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async function loadRemoteImage(src: URL) {
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try {
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const res = await fetch(src);
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if (!res.ok) {
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return undefined;
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}
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return Buffer.from(await res.arrayBuffer());
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} catch {
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return undefined;
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}
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}
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export const get: APIRoute = async ({ request }) => {
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try {
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const url = new URL(request.url);
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const transform = loader.parseTransform(url.searchParams);
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let inputBuffer: Buffer | undefined = undefined;
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// TODO: handle config subpaths?
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const sourceUrl = isRemoteImage(transform.src)
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? new URL(transform.src)
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: new URL(transform.src, url.origin);
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inputBuffer = await loadRemoteImage(sourceUrl);
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if (!inputBuffer) {
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return new Response('Not Found', { status: 404 });
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}
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const { data, format } = await loader.transform(inputBuffer, transform);
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return new Response(data, {
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status: 200,
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headers: {
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'Content-Type': mime.getType(format) || '',
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'Cache-Control': 'public, max-age=31536000',
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ETag: etag(data.toString()),
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Date: new Date().toUTCString(),
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},
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});
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} catch (err: unknown) {
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return new Response(`Server Error: ${err}`, { status: 500 });
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}
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};
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