hj, ok := w.(http.Hijacker)
if !ok {
http.Error(w, "ResponseWriter does not support connection upgrade", http.StatusInternalServerError)
return
}
w.Header().Set("Connection", "upgrade")
hj, ok := w.(http.Hijacker)
if !ok {
http.Error(w, "ResponseWriter does not support connection upgrade", http.StatusInternalServerError)
return
}
w.Header().Set("Connection", "upgrade")