/
conn_wrapper.go
92 lines (75 loc) · 2.03 KB
/
conn_wrapper.go
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// Copyright (C) 2017 Jennal(jennalcn@gmail.com). All rights reserved.
//
// Licensed under the MIT License (the "License"); you may not use this file except
// in compliance with the License. You may obtain a copy of the License at
//
// http://opensource.org/licenses/MIT
//
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
package websocket
import (
"errors"
"net"
"time"
"sync"
"github.com/gorilla/websocket"
)
var (
ERR_WRONG_MESSAGE_TYPE = errors.New("wrong message type")
)
type Conn struct {
*websocket.Conn
buffer []byte
sync.Mutex
}
func NewConn(conn *websocket.Conn) net.Conn {
return &Conn{
Conn: conn,
}
}
func (conn *Conn) readFromBuffer(b []byte) (int, error) {
conn.Lock()
defer conn.Unlock()
n := copy(b, conn.buffer)
conn.buffer = conn.buffer[n:]
return n, nil
}
func (conn *Conn) Read(b []byte) (int, error) {
if len(b) <= len(conn.buffer) {
return conn.readFromBuffer(b)
}
t, buffer, err := conn.ReadMessage()
// log.Log("Read: ", t, "\t", buffer, " | ", string(buffer), " (", len(buffer), ")\t", err) //, "\n\t", log.StackTrace(false))
if err != nil {
return 0, err
}
if t != websocket.BinaryMessage {
return 0, ERR_WRONG_MESSAGE_TYPE
}
conn.Lock()
conn.buffer = append(conn.buffer, buffer...)
conn.Unlock()
return conn.readFromBuffer(b)
}
func (conn *Conn) Write(b []byte) (int, error) {
err := conn.WriteMessage(websocket.BinaryMessage, b)
// log.Log("Write: ", websocket.BinaryMessage, "\t", b, " | ", string(b), " (", len(b), ")\t", err) //, "\n\t", log.StackTrace(false))
if err != nil {
return 0, err
}
return len(b), nil
}
func (conn *Conn) SetDeadline(t time.Time) error {
err := conn.SetReadDeadline(t)
if err != nil {
return err
}
err = conn.SetWriteDeadline(t)
if err != nil {
return err
}
return nil
}