Hijack() — gin Function Reference

Source Code

response_writer.go lines 111–121

func (w *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
	// Allow hijacking before any data is written (size == -1) or after headers are written (size == 0),
	// but not after body data is written (size > 0). For compatibility with websocket libraries (e.g., github.com/coder/websocket)
	if w.size > 0 {
		return nil, nil, errHijackAlreadyWritten
	}
	if w.size < 0 {
		w.size = 0
	}
	return w.ResponseWriter.(http.Hijacker).Hijack()
}