astro/dist/assets/endpoint/loadImage.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

import { isRemoteAllowed } from "@astrojs/internal-helpers/remote";
import { fetchWithRedirects } from "../utils/redirectValidation.js";
/**
* Fetches an image by URL. Used by the generic image endpoint for both
* remote images and local images (self-fetched from the same origin).
*
* For remote images, the final URL (after any redirects) is validated
* against `imageConfig.domains` and `imageConfig.remotePatterns`.
* Local images skip this check — they are already guarded by the
* same-origin check in the caller.
*/
export async function loadImage(src, headers, imageConfig, isRemote, fetchFn) {
	try {
		const res = await fetchWithRedirects({
			url: src,
			headers,
			imageConfig,
			fetchFn
		});
		if (isRemote && !isRemoteAllowed(res.url, imageConfig)) {
			return undefined;
		}
		if (!res.ok) {
			return undefined;
		}
		return await res.arrayBuffer();
	} catch {
		return undefined;
	}
}