142 lines
3.1 KiB
Go
142 lines
3.1 KiB
Go
package ws
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import (
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"context"
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"github.com/fox/fox/ksync"
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"github.com/fox/fox/log"
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"github.com/gorilla/websocket"
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"net/http"
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"sync"
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"time"
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)
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type IOnFunc interface {
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OnMessage(msg []byte) error
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}
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type Client struct {
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conn *websocket.Conn
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sendChan chan *wsMessage
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ctx context.Context
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cancel context.CancelFunc
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wg sync.WaitGroup
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onFunc IOnFunc
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}
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func NewClient(url string, onFunc IOnFunc) (*Client, error) {
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dialer := websocket.DefaultDialer
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dialer.HandshakeTimeout = 30 * time.Second
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conn, _, err := dialer.Dial(url, http.Header{"User-Agent": {"MyClient/1.0"}})
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if err != nil {
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return nil, err
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}
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ctx, cancel := context.WithCancel(context.Background())
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return &Client{
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conn: conn,
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sendChan: make(chan *wsMessage, 100),
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ctx: ctx,
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cancel: cancel,
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onFunc: onFunc,
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}, nil
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}
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func (c *Client) Start() {
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c.wg.Add(2)
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ksync.GoSafe(c.readLoop, nil)
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ksync.GoSafe(c.writeLoop, nil)
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ksync.GoSafe(c.heartbeatLoop, nil)
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}
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/*
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readLoop暂时没有好的办法及时退出协程，c.conn.ReadMessage()是阻塞式，导致协程无法及时catch到关闭信号
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如果在ReadMessage前调用SetReadDeadline设置超时，它会在超时后将底部连接状态标记为已损坏，后续ReadMessage会触发崩溃
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*/
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func (c *Client) readLoop() {
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//defer c.wg.Done()
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for {
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select {
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case <-c.ctx.Done():
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log.Debug("readLoop 收到关闭信号")
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return
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default:
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messageType, message, err := c.conn.ReadMessage()
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if err != nil {
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//log.Error(fmt.Sprintf("读取错误:%v", err))
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c.NotifyStop()
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return
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}
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switch messageType {
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case websocket.PingMessage:
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c.sendChan <- &wsMessage{messageType: websocket.PongMessage, data: []byte("pong")}
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case websocket.PongMessage:
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case websocket.TextMessage, websocket.BinaryMessage:
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_ = c.onFunc.OnMessage(message)
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case websocket.CloseMessage:
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log.Debug("收到关闭帧")
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c.NotifyStop()
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return
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}
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}
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}
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}
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func (c *Client) SendMsg(data []byte) {
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c.sendChan <- &wsMessage{messageType: websocket.BinaryMessage, data: data}
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}
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func (c *Client) writeLoop() {
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defer c.wg.Done()
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for {
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select {
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case msg := <-c.sendChan:
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switch msg.messageType {
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case websocket.PingMessage:
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_ = c.conn.WriteMessage(websocket.PingMessage, []byte("ping"))
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case websocket.PongMessage:
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_ = c.conn.WriteMessage(websocket.PongMessage, []byte("pong"))
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default:
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_ = c.conn.WriteMessage(msg.messageType, msg.data)
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}
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case <-c.ctx.Done():
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//log.Debug("writeLoop 收到关闭信号")
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// 发送关闭帧
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_ = c.conn.WriteControl(
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websocket.CloseMessage,
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websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""),
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time.Now().Add(10*time.Second),
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)
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return
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}
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}
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}
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func (c *Client) heartbeatLoop() {
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defer c.wg.Done()
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ticker := time.NewTicker(25 * time.Second)
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defer ticker.Stop()
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for {
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select {
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case <-ticker.C:
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c.sendChan <- &wsMessage{messageType: websocket.PingMessage, data: []byte("ping")}
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case <-c.ctx.Done():
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//log.Debug("heartbeatLoop 收到关闭信号")
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return
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}
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}
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}
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func (c *Client) WaitStop() {
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c.wg.Wait()
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}
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func (c *Client) NotifyStop() {
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c.cancel()
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_ = c.conn.Close()
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}
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