Refine the connection close

webcc/response_builder.cc

@@ -32,10 +32,14 @@ ResponsePtr ResponseBuilder::operator()() {
       }
     }
 #endif  // WEBCC_ENABLE_GZIP
-
-    response->SetBody(body_, true);
+  } else {
+    // Ensure the existing of `Content-Length` header if the body is empty.
+    // `Content-Length: 0` is required by most HTTP clients (e.g., Chrome).
+    body_ = std::make_shared<webcc::Body>();
   }
 
+  response->SetBody(body_, true);
+
   return response;
 }