Only set sec-websocket-extensions if we have an offer

uNetworking · Mar 1, 2019 · 2afe6a6 · 2afe6a6
1 parent b4b4225
commit 2afe6a6
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/App.h b/src/App.h
@@ -169,7 +169,10 @@ struct TemplatedApp {
                         extensionsNegotiator.readOffer(extensions);
 
                         /* Todo: remove these mid string copies */
-                        res->writeHeader("Sec-WebSocket-Extensions", extensionsNegotiator.generateOffer());
+                        std::string offer = extensionsNegotiator.generateOffer();
+                        if (offer.length()) {
+                            res->writeHeader("Sec-WebSocket-Extensions", offer);
+                        }
 
                         /* Did we negotiate permessage-deflate? */
                         if (extensionsNegotiator.getNegotiatedOptions() & PERMESSAGE_DEFLATE) {