func()

in mux.go [180:210]

• 21 lines of code
• 5 McCabe index (conditional complexity)

func (m *mux) getConnHandler(conn net.Conn, buf *bytes.Buffer) (connHandlerFunc, error) {
	rbuf := io.TeeReader(conn, buf)
	framer := http2.NewFramer(conn, rbuf)
	framer.SetReuseFrames()

	// Client expects SETTINGS first, so send empty initial settings.
	// The real server will send a new one with the real settings.
	//
	// When replaying frames to the real server, we'll need to suppress
	// the ACK for this frame, which the server won't know about.
	if err := framer.WriteSettings(); err != nil {
		return nil, err
	}

	// Read client preface. We don't bother verifying it here, as it will
	// be verified later by the real http2.Server.
	var preface [len(http2.ClientPreface)]byte
	if _, err := io.ReadFull(rbuf, preface[:]); err != nil {
		return nil, err
	}

	contentType, err := m.getContentType(framer, buf)
	if err != nil {
		return nil, err
	}
	connHandler := m.handleHTTP
	if contentType == grpcContentType {
		connHandler = m.handleGRPC
	}
	return connHandler, nil
}