Xray-core/transport/internet/websocket/connection.go
2021-09-20 21:00:55 +08:00

115 lines
2.4 KiB
Go

package websocket
import (
"io"
"net"
"time"
"github.com/gorilla/websocket"
"github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/common/errors"
"github.com/xtls/xray-core/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, extraReader io.Reader) *connection {
return &connection{
conn: conn,
remoteAddr: remoteAddr,
reader: extraReader,
}
}
// 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)
}