handleGET: hide S3 bucket responses

src/index.coffee

@@ -37,7 +37,17 @@ handleGET = (request) ->
     return new Response "Invalid URL",
       status: 404
 
-  return await s3.getObject url.pathname[1...], {}
+  resp = await s3.getObject url.pathname[1...], {}
+
+  if not resp.ok
+    headers = new Headers resp.headers
+    headers.set "Content-Length", 0
+    return new Response null,
+      status: resp.status
+      statusText: resp.statusText
+      headers: headers
+  else
+    return resp
 
 handlePUT = (request) ->
   url = new URL request.url