forked from zyxar/socketio
/
websocket.go
110 lines (95 loc) · 2.28 KB
/
websocket.go
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package engine
import (
"bytes"
"io"
"net"
"time"
"github.com/gorilla/websocket"
)
type websocketConn struct {
conn *websocket.Conn
}
// LocalAddr returns the local network address.
func (w *websocketConn) LocalAddr() net.Addr {
return w.conn.LocalAddr()
}
// RemoteAddr returns the remote network address.
func (w *websocketConn) RemoteAddr() net.Addr {
return w.conn.RemoteAddr()
}
func (w *websocketConn) nextWriter(msgType MessageType, pt PacketType) (io.WriteCloser, error) {
var m int
switch msgType {
case MessageTypeString:
m = websocket.TextMessage
case MessageTypeBinary:
m = websocket.BinaryMessage
default:
return nil, ErrInvalidPayload
}
wc, err := w.conn.NextWriter(m)
if err != nil {
return nil, err
}
b := []byte{byte(pt)}
switch msgType {
case MessageTypeString:
b[0] += '0'
}
if _, err := wc.Write(b); err != nil {
wc.Close()
return nil, err
}
return wc, nil
}
func (w *websocketConn) Close() error {
return w.conn.Close()
}
func (w *websocketConn) WritePacket(p *Packet) error {
wc, err := w.nextWriter(p.msgType, p.pktType)
if err != nil {
return err
}
if len(p.data) > 0 {
if _, err = wc.Write(p.data); err != nil {
wc.Close()
return err
}
}
return wc.Close()
}
func (w *websocketConn) ReadPacket() (p *Packet, err error) {
msgType, reader, err := w.conn.NextReader()
if err != nil {
return nil, err
}
b := []byte{0}
if _, err = io.ReadFull(reader, b); err != nil {
return nil, err
}
switch msgType {
case websocket.TextMessage:
b[0] -= '0'
p = &Packet{msgType: MessageTypeString, pktType: PacketType(b[0])}
case websocket.BinaryMessage:
p = &Packet{msgType: MessageTypeBinary, pktType: PacketType(b[0])}
default:
return nil, ErrInvalidPayload
}
var buffer bytes.Buffer
if _, err = buffer.ReadFrom(reader); err != nil {
return
}
p.data = buffer.Bytes()
return
}
func (w *websocketConn) SetReadDeadline(t time.Time) error {
return w.conn.SetReadDeadline(t)
}
func (w *websocketConn) SetWriteDeadline(t time.Time) error {
return w.conn.SetWriteDeadline(t)
}
func (*websocketConn) Pause() error { return ErrPauseNotSupported }
func (*websocketConn) Resume() error { return nil }
func (*websocketConn) FlushOut() []*Packet { return nil }
func (*websocketConn) FlushIn() []*Packet { return nil }