fix(judge-lab): tolerate missing image bindings

Author: kunaldhongade

judge-lab/tests/rendered-html.test.mjs

@@ -62,6 +62,17 @@ test("health endpoint reports engine and build provenance", async () => {
   assert.deepEqual(payload.evidenceModes, ["live", "precomputed"]);
 });
 
+test("image optimization endpoint does not crash without local worker bindings", async () => {
+  const worker = await createWorker();
+  const response = await worker.fetch(
+    new Request("http://localhost/_vinext/image?url=%2Flogo.png&w=128&q=75"),
+    {},
+    context,
+  );
+
+  assert.notEqual(response.status, 500);
+});
+
 test("live endpoint finds the curated anonymous admin route", async () => {
   const worker = await createWorker();
   const response = await worker.fetch(

judge-lab/worker/index.ts

@@ -8,9 +8,9 @@ import {
 } from "vinext/server/image-optimization";
 
 interface Env {
-  ASSETS: Fetcher;
+  ASSETS?: Fetcher;
   DB: D1Database;
-  IMAGES: {
+  IMAGES?: {
     input(stream: ReadableStream): {
       transform(options: Record<string, unknown>): {
         output(options: { format: string; quality: number }): Promise<{ response(): Response }>;
@@ -39,8 +39,19 @@ const worker = {
       return handleImageOptimization(
         request,
         {
-          fetchAsset: (path) => env.ASSETS.fetch(new Request(new URL(path, request.url))),
+          fetchAsset: (path) => {
+            if (!env.ASSETS) {
+              return Promise.resolve(new Response("Not found", { status: 404 }));
+            }
+            return env.ASSETS.fetch(new Request(new URL(path, request.url)));
+          },
           transformImage: async (body, { width, format, quality }) => {
+            if (!env.IMAGES) {
+              return new Response(body, {
+                headers: { "content-type": `image/${format}` },
+                status: 200,
+              });
+            }
             const result = await env.IMAGES.input(body)
               .transform(width > 0 ? { width } : {})
               .output({ format, quality });