Add xhttp transport

transport/v2rayxhttp/conn.go

@@ -0,0 +1,108 @@
+package xhttp
+
+import (
+	"bufio"
+	"io"
+	"net"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/sagernet/sing-box/common/xray/signal/done"
+)
+
+type splitConn struct {
+	writer     io.WriteCloser
+	reader     io.ReadCloser
+	remoteAddr net.Addr
+	localAddr  net.Addr
+	onClose    func()
+}
+
+func (c *splitConn) Write(b []byte) (int, error) {
+	return c.writer.Write(b)
+}
+
+func (c *splitConn) Read(b []byte) (int, error) {
+	return c.reader.Read(b)
+}
+
+func (c *splitConn) Close() error {
+	if c.onClose != nil {
+		c.onClose()
+	}
+
+	err := c.writer.Close()
+	err2 := c.reader.Close()
+	if err != nil {
+		return err
+	}
+
+	if err2 != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *splitConn) LocalAddr() net.Addr {
+	return c.localAddr
+}
+
+func (c *splitConn) RemoteAddr() net.Addr {
+	return c.remoteAddr
+}
+
+func (c *splitConn) SetDeadline(t time.Time) error {
+	// TODO cannot do anything useful
+	return nil
+}
+
+func (c *splitConn) SetReadDeadline(t time.Time) error {
+	// TODO cannot do anything useful
+	return nil
+}
+
+func (c *splitConn) SetWriteDeadline(t time.Time) error {
+	// TODO cannot do anything useful
+	return nil
+}
+
+type H1Conn struct {
+	UnreadedResponsesCount int
+	RespBufReader          *bufio.Reader
+	net.Conn
+}
+
+func NewH1Conn(conn net.Conn) *H1Conn {
+	return &H1Conn{
+		RespBufReader: bufio.NewReader(conn),
+		Conn:          conn,
+	}
+}
+
+type httpServerConn struct {
+	sync.Mutex
+	*done.Instance
+	io.Reader // no need to Close request.Body
+	http.ResponseWriter
+}
+
+func (c *httpServerConn) Write(b []byte) (int, error) {
+	c.Lock()
+	defer c.Unlock()
+	if c.Done() {
+		return 0, io.ErrClosedPipe
+	}
+	n, err := c.ResponseWriter.Write(b)
+	if err == nil {
+		c.ResponseWriter.(http.Flusher).Flush()
+	}
+	return n, err
+}
+
+func (c *httpServerConn) Close() error {
+	c.Lock()
+	defer c.Unlock()
+	return c.Instance.Close()
+}