v1.0.0

transport/internet/websocket/connection.go

@@ -0,0 +1,114 @@
+// +build !confonly
+
+package websocket
+
+import (
+	"io"
+	"net"
+	"time"
+
+	"github.com/gorilla/websocket"
+	"github.com/xtls/xray-core/v1/common/buf"
+	"github.com/xtls/xray-core/v1/common/errors"
+	"github.com/xtls/xray-core/v1/common/serial"
+)
+
+var (
+	_ buf.Writer = (*connection)(nil)
+)
+
+// connection is a wrapper for net.Conn over WebSocket connection.
+type connection struct {
+	conn       *websocket.Conn
+	reader     io.Reader
+	remoteAddr net.Addr
+}
+
+func newConnection(conn *websocket.Conn, remoteAddr net.Addr) *connection {
+	return &connection{
+		conn:       conn,
+		remoteAddr: remoteAddr,
+	}
+}
+
+// Read implements net.Conn.Read()
+func (c *connection) Read(b []byte) (int, error) {
+	for {
+		reader, err := c.getReader()
+		if err != nil {
+			return 0, err
+		}
+
+		nBytes, err := reader.Read(b)
+		if errors.Cause(err) == io.EOF {
+			c.reader = nil
+			continue
+		}
+		return nBytes, err
+	}
+}
+
+func (c *connection) getReader() (io.Reader, error) {
+	if c.reader != nil {
+		return c.reader, nil
+	}
+
+	_, reader, err := c.conn.NextReader()
+	if err != nil {
+		return nil, err
+	}
+	c.reader = reader
+	return reader, nil
+}
+
+// Write implements io.Writer.
+func (c *connection) Write(b []byte) (int, error) {
+	if err := c.conn.WriteMessage(websocket.BinaryMessage, b); err != nil {
+		return 0, err
+	}
+	return len(b), nil
+}
+
+func (c *connection) WriteMultiBuffer(mb buf.MultiBuffer) error {
+	mb = buf.Compact(mb)
+	mb, err := buf.WriteMultiBuffer(c, mb)
+	buf.ReleaseMulti(mb)
+	return err
+}
+
+func (c *connection) Close() error {
+	var errors []interface{}
+	if err := c.conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(time.Second*5)); err != nil {
+		errors = append(errors, err)
+	}
+	if err := c.conn.Close(); err != nil {
+		errors = append(errors, err)
+	}
+	if len(errors) > 0 {
+		return newError("failed to close connection").Base(newError(serial.Concat(errors...)))
+	}
+	return nil
+}
+
+func (c *connection) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *connection) RemoteAddr() net.Addr {
+	return c.remoteAddr
+}
+
+func (c *connection) SetDeadline(t time.Time) error {
+	if err := c.SetReadDeadline(t); err != nil {
+		return err
+	}
+	return c.SetWriteDeadline(t)
+}
+
+func (c *connection) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *connection) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}