/
websockettunnel_connection.go
103 lines (86 loc) · 2.5 KB
/
websockettunnel_connection.go
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package streams
import (
"github.com/bokysan/socketace/v2/internal/util/buffers"
"github.com/gorilla/websocket"
"github.com/pkg/errors"
"io"
"net"
"time"
)
// WebsocketConnection implements a ReadWriteCloser over a websocket connection
type WebsocketTunnelConnection struct {
*websocket.Conn
closed bool
}
func NewWebsocketTunnelConnection(conn *websocket.Conn) *WebsocketTunnelConnection {
return &WebsocketTunnelConnection{
Conn: conn,
}
}
func (wstc *WebsocketTunnelConnection) Read(p []byte) (int, error) {
messageType, message, err := wstc.Conn.ReadMessage()
if messageType == websocket.CloseMessage || messageType == -1 {
return 0, io.EOF
} else if messageType != websocket.BinaryMessage {
return 0, errors.Errorf("Invalid message type: %v", messageType)
} else if err != nil {
return 0, errors.WithStack(err)
}
msgLen := len(message)
if len(p) < msgLen {
return 0, errors.Errorf("Buffer to small: message size is %v, but buffer size is %v", msgLen, len(p))
}
copy(p, message)
return msgLen, nil
}
// Write will take a stream of bytes and send it over a websocket connection.
func (wstc *WebsocketTunnelConnection) Write(p []byte) (int, error) {
dataLen := len(p)
for {
if len(p) > buffers.BufferSize {
err := wstc.Conn.WriteMessage(websocket.BinaryMessage, p[:buffers.BufferSize])
if err != nil {
return 0, errors.WithStack(err)
}
p = p[buffers.BufferSize:]
} else {
err := wstc.Conn.WriteMessage(websocket.BinaryMessage, p)
if err != nil {
return 0, errors.WithStack(err)
}
break
}
}
return dataLen, nil
}
func (wstc *WebsocketTunnelConnection) Close() error {
if wstc.closed {
return nil
}
err := LogClose(wstc.Conn)
wstc.closed = true
return err
}
func (wstc *WebsocketTunnelConnection) Closed() bool {
return wstc.closed
}
func (wstc *WebsocketTunnelConnection) LocalAddr() net.Addr {
return wstc.Conn.LocalAddr()
}
// RemoteAddr returns the remote network address.
func (wstc *WebsocketTunnelConnection) RemoteAddr() net.Addr {
return wstc.Conn.RemoteAddr()
}
func (wstc *WebsocketTunnelConnection) SetDeadline(t time.Time) error {
return wstc.Conn.UnderlyingConn().SetDeadline(t)
}
func (wstc *WebsocketTunnelConnection) SetReadDeadline(t time.Time) error {
return wstc.Conn.SetReadDeadline(t)
}
func (wstc *WebsocketTunnelConnection) SetWriteDeadline(t time.Time) error {
return wstc.Conn.SetWriteDeadline(t)
}
// Unwrap returns the embedded net.Conn
func (wstc *WebsocketTunnelConnection) Unwrap() net.Conn {
return wstc.Conn.UnderlyingConn()
}