net/http package Server struct in the SDK have ConnState func(net.Conn, ConnState), But not exists in the 'Server' struct of 'x/net/http2'
With the h2c feature, when the state variable is converted to http.StateHijacked , I will no longer know the subsequent state of the connection.
I expect to be able to follow the status of this TCP connection until it is closed.
Is there such a function or a flexible solution? Thank you
You should not use this code in your production.
From x/net/http2:
This is a work-in-progress HTTP/2 implementation for Go.
For your h2c support there is information:
ServeConn serves HTTP/2 requests on the provided connection and blocks until the connection is no longer readable.
ServeConn starts speaking HTTP/2 assuming that c has not had any reads or writes. It writes its initial settings frame and expects to be able to read the preface and settings frame from the client. If c has a ConnectionState method like a *tls.Conn, the ConnectionState is used to verify the TLS ciphersuite and to set the Request.TLS field in Handlers.
ServeConn does not support h2c by itself. Any h2c support must be implemented in terms of providing a suitably-behaving net.Conn.
H2C is not supported with HTTP/2, there are few technical reason why they cut that support. More information you can find in the following Stack thread: Why do web browsers not support h2c (HTTP/2 without TLS)?
You should not know state of connection, you should rely on the language library. If you need to check if connection can accept new connection, you have function here: https://pkg.go.dev/golang.org/x/net/http2#ClientConn.CanTakeNewRequest
Just to take more context, I have one question: Why do you need to know connection state in your application? It is a logic that should be hidden from your app.
