astro/dist/assets/endpoint/node.js

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

// @ts-expect-error
import { outDir, serverDir } from "astro:assets";
import { readFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";
import { isParentDirectory } from "@astrojs/internal-helpers/path";
import { handleImageRequest } from "./shared.js";
async function loadLocalImage(src, url) {
	const outDirURL = resolveOutDir();
	// If the _image segment isn't at the start of the path, we have a base
	const idx = url.pathname.indexOf("/_image");
	if (idx > 0) {
		// Remove the base path
		src = src.slice(idx);
	}
	let fileUrl;
	try {
		if (!URL.canParse("." + src, outDirURL)) {
			return { kind: "invalid-path" };
		}
		fileUrl = new URL("." + src, outDirURL);
		if (fileUrl.protocol !== "file:" || !isParentDirectory(fileURLToPath(outDirURL), fileURLToPath(fileUrl))) {
			return { kind: "invalid-path" };
		}
	} catch {
		return { kind: "invalid-path" };
	}
	try {
		return {
			kind: "loaded",
			buffer: await readFile(fileUrl)
		};
	} catch (error) {
		if (error instanceof Error && "code" in error && (error.code === "ENOENT" || error.code === "ENOTDIR" || error.code === "EISDIR")) {
			return { kind: "not-found" };
		}
		return { kind: "failed" };
	}
}
/**
* Endpoint used in dev and SSR to serve optimized images by the base image services
*/
export const GET = async ({ request, logger }) => {
	try {
		return await handleImageRequest({
			request,
			loadLocalImage,
			logger
		});
	} catch (err) {
		logger.error(`Could not process image request: ${err}`);
		return new Response("Internal Server Error", { status: 500 });
	}
};
function resolveOutDir() {
	const serverDirPath = fileURLToPath(serverDir);
	const rel = path.relative(serverDirPath, fileURLToPath(outDir));
	const serverFolder = path.basename(serverDirPath);
	let serverEntryFolderURL = path.dirname(import.meta.url);
	while (!serverEntryFolderURL.endsWith(serverFolder)) {
		serverEntryFolderURL = path.dirname(serverEntryFolderURL);
	}
	const serverEntryURL = serverEntryFolderURL + "/entry.mjs";
	const outDirURL = new URL(appendForwardSlash(rel), serverEntryURL);
	return outDirURL;
}
function appendForwardSlash(pth) {
	return pth.endsWith("/") ? pth : pth + "/";
}