fix: ignore timeout on websocket (#1802)

rest/handler/timeouthandler.go

@@ -20,6 +20,8 @@ import (
 const (
 	statusClientClosedRequest = 499
 	reason                    = "Request Timeout"
+	headerUpgrade             = "Upgrade"
+	valueWebsocket            = "websocket"
 )
 
 // TimeoutHandler returns the handler with given timeout.
@@ -52,6 +54,11 @@ func (h *timeoutHandler) errorBody() string {
 }
 
 func (h *timeoutHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if r.Header.Get(headerUpgrade) == valueWebsocket {
+		h.handler.ServeHTTP(w, r)
+		return
+	}
+
 	ctx, cancelCtx := context.WithTimeout(r.Context(), h.dt)
 	defer cancelCtx()