forked from leizongmin/huobiapi
/
ws.go
114 lines (99 loc) · 2.49 KB
/
ws.go
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package market
import (
"fmt"
"time"
"github.com/gorilla/websocket"
)
var SafeWebSocketDestroyError = fmt.Errorf("connection destroy by user")
// SafeWebSocket 安全的WebSocket封装
// 保证读取和发送操作是并发安全的,支持自定义保持alive函数
type SafeWebSocket struct {
ws *websocket.Conn
listener SafeWebSocketMessageListener
aliveHandler SafeWebSocketAliveHandler
aliveInterval time.Duration
sendQueue chan []byte
lastError error
runningTaskSend bool
runningTaskRead bool
runningTaskAlive bool
}
type SafeWebSocketMessageListener = func(b []byte)
type SafeWebSocketAliveHandler = func()
// NewSafeWebSocket 创建安全的WebSocket实例并连接
func NewSafeWebSocket(endpoint string) (*SafeWebSocket, error) {
ws, _, err := websocket.DefaultDialer.Dial(endpoint, nil)
if err != nil {
return nil, err
}
s := &SafeWebSocket{ws: ws, sendQueue: make(chan []byte, 1000), aliveInterval: time.Second * 60}
go func() {
s.runningTaskSend = true
for s.lastError == nil {
b := <-s.sendQueue
if err := s.ws.WriteMessage(websocket.TextMessage, b); err != nil {
s.lastError = err
break
}
}
s.runningTaskSend = false
}()
go func() {
s.runningTaskRead = true
for s.lastError == nil {
_, b, err := s.ws.ReadMessage()
if err != nil {
s.lastError = err
break
}
s.listener(b)
}
s.runningTaskRead = false
}()
go func() {
s.runningTaskAlive = true
for s.lastError == nil {
if s.aliveHandler != nil {
s.aliveHandler()
}
time.Sleep(s.aliveInterval)
}
s.runningTaskAlive = false
}()
return s, nil
}
// Listen 监听消息
func (s *SafeWebSocket) Listen(h SafeWebSocketMessageListener) {
s.listener = h
}
// Send 发送消息
func (s *SafeWebSocket) Send(b []byte) {
s.sendQueue <- b
}
// KeepAlive 设置alive周期及函数
func (s *SafeWebSocket) KeepAlive(v time.Duration, h SafeWebSocketAliveHandler) {
s.aliveInterval = v
s.aliveHandler = h
}
// Destroy 销毁
func (s *SafeWebSocket) Destroy() (err error) {
s.lastError = SafeWebSocketDestroyError
for !s.runningTaskRead && !s.runningTaskSend && !s.runningTaskAlive {
time.Sleep(time.Millisecond * 100)
}
if s.ws != nil {
err = s.ws.Close()
s.ws = nil
}
s.listener = nil
s.aliveHandler = nil
s.sendQueue = nil
return err
}
// Loop 进入事件循环,直到连接关闭才退出
func (s *SafeWebSocket) Loop() error {
for s.lastError == nil {
time.Sleep(time.Millisecond * 100)
}
return s.lastError
}