From 692aced7c1b9b122416660490637b88c0f7665b1 Mon Sep 17 00:00:00 2001
From: Brian Frank <briansfrank@gmail.com>
Date: Wed, 16 Aug 2023 08:55:49 -0400
Subject: [PATCH] web: WebSocket.openServer echo back the
 Sec-WebSocket-Protocol header

---
 src/web/fan/WebSocket.fan | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/web/fan/WebSocket.fan b/src/web/fan/WebSocket.fan
index bc4ad5ca2..1794ea60c 100644
--- a/src/web/fan/WebSocket.fan
+++ b/src/web/fan/WebSocket.fan
@@ -73,6 +73,7 @@ class WebSocket
     res.headers["Upgrade"] = "websocket"
     res.headers["Connection"] = "Upgrade"
     res.headers["Sec-WebSocket-Accept"] = secDigest(key)
+    res.headers.addNotNull("Sec-WebSocket-Protocol", req.headers["Sec-WebSocket-Protocol"])
 
     // take ownership of the underlying socket
     socket := res.upgrade(101)