来自服务器的http.ResponseWritter-如何知道客户端是否收到响应

In my project I've got a use case when I send (I'm the server) a response to a hardware (the client) and I would like to revert some changes if the client disconnect from the wifi before reading the response.

render.Status(r, http.StatusCreated)
render.Respond(w, r, obj)

I do a respond and from this point on I want to check if the response is lost in the wild or found the client.

I've tried to hijacked it:

hj, ok := w.(http.Hijacker)
if !ok {
    http.Error(w, "webserver doesn't support hijacking", http.StatusInternalServerError)
    return
}
logs.Println("2")
conn, bufrw, err := hj.Hijack()
if err != nil {
    http.Error(w, err.Error(), http.StatusInternalServerError)
    return
}
err = conn.Close()
if err != nil {
    logs.Println("LOL", err)
}
...

But I can't catch anything... I've tried to check the w.Write() err without success!

Any idea on how to proceed?