86 lines
1.8 KiB
Go
86 lines
1.8 KiB
Go
/*
|
|
* Copyright (C) 2018 Simon Eisenmann
|
|
* Copyright (C) 2014-2017 struktur AG
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* 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 main
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/gorilla/websocket"
|
|
)
|
|
|
|
const (
|
|
writeWait = 10 * time.Second
|
|
pongWait = 60 * time.Second
|
|
pingPeriod = (pongWait * 9) / 10
|
|
maxMessageSize = 512
|
|
)
|
|
|
|
type connection struct {
|
|
ws *websocket.Conn
|
|
send chan []byte
|
|
iface string
|
|
}
|
|
|
|
func (c *connection) readPump() {
|
|
defer func() {
|
|
h.unregister <- c
|
|
c.ws.Close()
|
|
}()
|
|
c.ws.SetReadLimit(maxMessageSize)
|
|
c.ws.SetReadDeadline(time.Now().Add(pongWait))
|
|
c.ws.SetPongHandler(func(string) error {
|
|
c.ws.SetReadDeadline(time.Now().Add(pongWait))
|
|
return nil
|
|
})
|
|
for {
|
|
_, _, err := c.ws.ReadMessage()
|
|
if err != nil {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *connection) write(mt int, payload []byte) error {
|
|
c.ws.SetWriteDeadline(time.Now().Add(writeWait))
|
|
return c.ws.WriteMessage(mt, payload)
|
|
}
|
|
|
|
func (c *connection) writePump() {
|
|
ticker := time.NewTicker(pingPeriod)
|
|
defer func() {
|
|
ticker.Stop()
|
|
c.ws.Close()
|
|
}()
|
|
for {
|
|
select {
|
|
case message, ok := <-c.send:
|
|
if !ok {
|
|
c.write(websocket.CloseMessage, []byte{})
|
|
return
|
|
}
|
|
if err := c.write(websocket.TextMessage, message); err != nil {
|
|
return
|
|
}
|
|
case <-ticker.C:
|
|
if err := c.write(websocket.PingMessage, []byte{}); err != nil {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|