From f76432368055264a459f57619b7aa73808929439 Mon Sep 17 00:00:00 2001
From: Chris Park <chris.park@aligent.com.au>
Date: Wed, 1 Nov 2023 11:55:20 +1030
Subject: [PATCH] DO-1563: (Legacy) Log custom header having the Prerender
 requester's User-Agent information

---
 packages/prerender-proxy/lib/handlers/prerender-check.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/packages/prerender-proxy/lib/handlers/prerender-check.ts b/packages/prerender-proxy/lib/handlers/prerender-check.ts
index 879c1d25..6ab03ad3 100644
--- a/packages/prerender-proxy/lib/handlers/prerender-check.ts
+++ b/packages/prerender-proxy/lib/handlers/prerender-check.ts
@@ -26,6 +26,14 @@ export const handler = async (
       request.headers["x-prerender-host"] = [
         { key: "X-Prerender-Host", value: request.headers.host[0].value },
       ];
+
+      // Custom header to be forwarded to Prerender service for better logging
+      request.headers["x-prerender-user-agent"] = [
+        {
+          key: "x-prerender-user-agent",
+          value: request.headers["user-agent"][0].value,
+        },
+      ];
     }
   }