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

2019-03-01 15:43:20 +01:00
parent b4b4225fb3
commit 2afe6a6efb
1 changed files with 4 additions and 1 deletions
@@ -169,7 +169,10 @@ public:
                        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) {