feat(knowledge): add service library

frontend/athena/lib/server/hermes-proxy.ts

@@ -57,3 +57,47 @@ export async function proxyHermesRequest(
 
   return hermesJsonResponse(hermesResponse);
 }
+
+export async function proxyHermesStreamRequest(
+  request: NextRequest,
+  path: string,
+) {
+  const token = await getAccessToken();
+
+  if (!token) {
+    return unauthorizedResponse();
+  }
+
+  const hermesUrl = getHermesUrl();
+
+  if (!hermesUrl) {
+    return upstreamConfigurationErrorResponse();
+  }
+
+  let hermesResponse: Response;
+
+  try {
+    hermesResponse = await fetch(`${hermesUrl}${path}`, {
+      method: request.method,
+      headers: {
+        Authorization: `Bearer ${token}`,
+        Accept: request.headers.get("accept") ?? "*/*",
+      },
+      cache: "no-store",
+    });
+  } catch {
+    return upstreamUnavailableResponse();
+  }
+
+  if (!hermesResponse.ok) {
+    return hermesJsonResponse(hermesResponse);
+  }
+
+  return new Response(hermesResponse.body, {
+    status: hermesResponse.status,
+    headers: {
+      "Content-Type": hermesResponse.headers.get("content-type") ?? "application/octet-stream",
+      "Content-Disposition": hermesResponse.headers.get("content-disposition") ?? "attachment",
+    },
+  });
+}