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