Feature/keep alive (#25)

* feat(#keepAlive) : keepAlive

* feat(#keepAlive) : keepAlive

---------

Co-authored-by: mike.wq <mike.wq@alibaba-inc.com>

client/client.go

@@ -41,10 +41,13 @@ type StreamClient struct {
 	extras        map[string]string
 	openApiHost   string
 	proxy         string
+	keepAliveIdle time.Duration
 }
 
 func NewStreamClient(options ...ClientOption) *StreamClient {
-	cli := &StreamClient{}
+	cli := &StreamClient{
+		keepAliveIdle: 120 * time.Second,
+	}
 
 	defaultOptions := []ClientOption{
 		WithSubscription(utils.SubscriptionTypeKSystem, "disconnect", cli.OnDisconnect),
@@ -133,21 +136,68 @@ func (cli *StreamClient) processLoop() {
 		}
 	}()
 
-	for {
 	if cli.conn == nil {
 		logger.GetLogger().Errorf("connection process connect nil, maybe disconnected.")
 		return
 	}
 
+	readChan := make(chan []byte)
+	pongChan := make(chan struct{})
+	closeChan := make(chan struct{})
+	defer func() { close(closeChan) }()
+	defer func() { close(pongChan) }()
+	defer func() { close(readChan) }()
+
+	cli.conn.SetPongHandler(func(appData string) error {
+		pongChan <- struct{}{}
+		return nil
+	})
+	//开始启动协程读数据
+	go func() {
+		for {
 			messageType, message, err := cli.conn.ReadMessage()
 			if err != nil {
 				logger.GetLogger().Errorf("connection process read message error: messageType=[%d] message=[%s] error=[%s]", messageType, string(message), err)
+				closeChan <- struct{}{}
 				return
 			}
+			if messageType == websocket.TextMessage {
+				readChan <- message
+			}
+		}
+	}()
 
-		logger.GetLogger().Debugf("[wire] [websocket] remote => local: \n%s", string(message))
-
-		go cli.processDataFrame(message)
+	//循环处理事件
+	for {
+		timer := time.NewTimer(cli.keepAliveIdle)
+		select {
+		case msg, ok := <-readChan:
+			timer.Stop()
+			if ok {
+				go cli.processDataFrame(msg)
+			} else {
+				logger.GetLogger().Errorf("connection process is closed")
+				return
+			}
+		case <-timer.C:
+			e := cli.conn.WriteMessage(websocket.PingMessage, nil)
+			if e != nil {
+				logger.GetLogger().Errorf("connection write ping message error: error=[%s]", e)
+				return
+			}
+			go func() {
+				select {
+				case <-pongChan:
+					return
+				case <-time.After(5 * time.Second):
+					logger.GetLogger().Errorf("ping time out, connection is closing")
+					closeChan <- struct{}{}
+					return
+				}
+			}()
+		case <-closeChan:
+			return
+		}
 	}
 }
 

client/config.go

@@ -41,7 +41,7 @@ type UserAgentConfig struct {
 
 func NewDingtalkGoSDKUserAgent() *UserAgentConfig {
 	return &UserAgentConfig{
-		UserAgent: "dingtalk-sdk-go/v0.9.0",
+		UserAgent: "dingtalk-sdk-go/v0.9.1",
 	}
 }
 

client/option.go

@@ -1,6 +1,9 @@
 package client
 
-import "github.com/open-dingtalk/dingtalk-stream-sdk-go/handler"
+import (
+	"github.com/open-dingtalk/dingtalk-stream-sdk-go/handler"
+	"time"
+)
 
 /**
  * @Author linya.jj
@@ -27,6 +30,14 @@ func WithSubscription(stype, stopic string, frameHandler handler.IFrameHandler)
 	}
 }
 
+func WithKeepAlive(keepAliveIdle time.Duration) ClientOption {
+	return func(client *StreamClient) {
+		if keepAliveIdle >= 3*time.Second {
+			client.keepAliveIdle = keepAliveIdle
+		}
+	}
+}
+
 func WithUserAgent(ua *UserAgentConfig) ClientOption {
 	return func(c *StreamClient) {
 		if ua.Valid() != nil {