package httpconn

import (
	"io"
	"net"
	"net/http"
	"time"
)

func Accept(w http.ResponseWriter, r *http.Request) (net.Conn, error) {
	if r.Method != "CONNECT" {
		w.Header().Set("Content-Type", "text/plain; charset=utf-8")
		w.WriteHeader(http.StatusMethodNotAllowed)
		io.WriteString(w, "405 must CONNECT\n")
		return nil, http.ErrNotSupported
	}

	hj, ok := w.(http.Hijacker)
	if !ok {
		return nil, http.ErrNotSupported
	}

	conn, _, err := hj.Hijack()
	if err != nil {
		return nil, err
	}

	_, _ = io.WriteString(conn, "HTTP/1.0 200 OK\n\n")
	conn.SetDeadline(time.Time{})

	return conn, nil
}