fix: adding reconnect when deadline met

v1/client/client.go

@@ -3,6 +3,7 @@ package client
 import (
 	"context"
 	"fmt"
+	"io"
 	"log"
 	"net/url"
 	"strings"
@@ -15,7 +16,8 @@ import (
 )
 
 const (
-	pingPeriod = 10 * time.Second
+	pingPeriod   = 10 * time.Second
+	readDeadline = 30 * time.Second
 )
 
 type SafeMap[K comparable, V any] struct {
@@ -64,12 +66,28 @@ func (sm *SafeMap[K, V]) Len() int {
 	return count
 }
 
+type MessageType uint
+
+const (
+	MessageTypeText  MessageType = iota + 1
+	MessageTypePing  MessageType = iota
+	MessageTypePong  MessageType = iota
+	MessageTypeClose MessageType = iota
+)
+
+type Message struct {
+	MessageType MessageType
+	Data        []byte
+}
+
 type SafeWebsocketClientBuilder struct {
-	baseHost *string `nil_checker:"required"`
+	baseHost       *string `nil_checker:"required"`
-	basePort *uint16 `nil_checker:"required"`
+	basePort       *uint16 `nil_checker:"required"`
-	path     *string
+	path           *string
-	rawQuery *string
+	rawQuery       *string
-	useTLS   *bool
+	useTLS         *bool
+	channelSize    *int64
+	authenticateFn func(*SafeWebsocketClient) error
 }
 
 func NewSafeWebsocketClientBuilder() *SafeWebsocketClientBuilder {
@@ -91,6 +109,11 @@ func (b *SafeWebsocketClientBuilder) UseTLS(useTLS bool) *SafeWebsocketClientBui
 	return b
 }
 
+func (b *SafeWebsocketClientBuilder) AuthenticateFn(authenticateFn func(*SafeWebsocketClient) error) *SafeWebsocketClientBuilder {
+	b.authenticateFn = authenticateFn
+	return b
+}
+
 func (b *SafeWebsocketClientBuilder) Path(path string) *SafeWebsocketClientBuilder {
 	b.path = &path
 	return b
@@ -101,7 +124,12 @@ func (b *SafeWebsocketClientBuilder) RawQuery(rawQuery string) *SafeWebsocketCli
 	return b
 }
 
-func (b *SafeWebsocketClientBuilder) Build(channelSize int) (*SafeWebsocketClient, error) {
+func (b *SafeWebsocketClientBuilder) ChannelSize(channelSize int64) *SafeWebsocketClientBuilder {
+	b.channelSize = &channelSize
+	return b
+}
+
+func (b *SafeWebsocketClientBuilder) Build(ctx context.Context) (*SafeWebsocketClient, error) {
 	if err := internal.NilChecker(b); err != nil {
 		return nil, err
 	}
@@ -111,17 +139,28 @@ func (b *SafeWebsocketClientBuilder) Build(channelSize int) (*SafeWebsocketClien
 		useTLS = *b.useTLS
 	}
 
+	if b.channelSize == nil {
+		channelSize := int64(1)
+		b.channelSize = &channelSize
+	}
+
 	wsClient := SafeWebsocketClient{
 		baseHost:    *b.baseHost,
 		basePort:    *b.basePort,
 		useTLS:      useTLS,
 		path:        b.path,
 		rawQuery:    b.rawQuery,
-		dataChannel: make(chan []byte, channelSize),
+		dataChannel: make(chan []byte, *b.channelSize),
 		mu:          custom_rwmutex.NewCustomRwMutex(),
+		ctx:         ctx,
 		reconnectCh: make(chan struct{}, 1),
 		isConnected: false,
 		doneMap:     NewSafeMap[string, chan struct{}](),
+		writeChan:   make(chan Message),
+	}
+
+	if b.authenticateFn != nil {
+		wsClient.authenticateFn = b.authenticateFn
 	}
 
 	go wsClient.reconnectHandler()
@@ -134,20 +173,27 @@ func (b *SafeWebsocketClientBuilder) Build(channelSize int) (*SafeWebsocketClien
 }
 
 type SafeWebsocketClient struct {
-	baseHost    string
+	baseHost string
-	basePort    uint16
+	basePort uint16
-	useTLS      bool
+	useTLS   bool
-	path        *string
+	path     *string
-	rawQuery    *string
+	rawQuery *string
+
 	dataChannel chan []byte
 	mu          *custom_rwmutex.CustomRwMutex
 	conn        *websocket.Conn
-	ctx         context.Context
+	cancelFuncs []context.CancelFunc
-	cancel      context.CancelFunc
-	reconnectCh chan struct{}
-	isConnected bool
 
-	doneMap *SafeMap[string, chan struct{}]
+	ctx    context.Context
+	Cancel context.CancelFunc
+
+	reconnectCh    chan struct{}
+	reconnectChans []chan struct{}
+	isConnected    bool
+	doneMap        *SafeMap[string, chan struct{}]
+	authenticateFn func(*SafeWebsocketClient) error
+
+	writeChan chan Message
 }
 
 func (wsClient *SafeWebsocketClient) connect() error {
@@ -176,36 +222,118 @@ func (wsClient *SafeWebsocketClient) connect() error {
 	}
 
 	conn.SetPingHandler(func(pingData string) error {
-		return wsClient.mu.WriteHandler(func() error {
+		if err := conn.WriteMessage(websocket.PongMessage, []byte(pingData)); err != nil {
-			if err := conn.WriteMessage(websocket.PongMessage, []byte(pingData)); err != nil {
+			if err == websocket.ErrCloseSent {
-				if err == websocket.ErrCloseSent {
+				return nil
-					return nil
-				}
-				if netErr, ok := err.(interface{ Timeout() bool }); ok && netErr.Timeout() {
-					return nil
-				}
-				return err
 			}
-			return nil
+			if netErr, ok := err.(interface{ Timeout() bool }); ok && netErr.Timeout() {
-		})
+				return nil
-	})
+			}
-
+			return err
-	wsClient.mu.WriteHandler(func() error {
-		if wsClient.conn != nil {
-			wsClient.conn.Close()
 		}
-
-		ctx, cancel := context.WithCancel(context.Background())
-		wsClient.ctx = ctx
-		wsClient.cancel = cancel
-		wsClient.conn = conn
-		wsClient.isConnected = true
-
-		go wsClient.startPingTicker(ctx)
-		go wsClient.startReceiveHandler(ctx)
-
 		return nil
 	})
+
+	pingCtx, pingCancel := context.WithCancel(context.Background())
+	go wsClient.startPingTicker(pingCtx)
+	wsClient.mu.WriteHandler(func() error {
+		wsClient.cancelFuncs = append(wsClient.cancelFuncs, pingCancel)
+		return nil
+	})
+
+	if wsClient.conn != nil {
+		wsClient.conn.Close()
+	}
+	wsClient.conn = conn
+	wsClient.isConnected = true
+
+	if wsClient.authenticateFn != nil {
+		if err := wsClient.authenticateFn(wsClient); err != nil {
+			return err
+		}
+	}
+
+	go func() {
+		ctx, cancel := context.WithCancel(context.Background())
+		wsClient.mu.WriteHandler(func() error {
+			wsClient.cancelFuncs = append(wsClient.cancelFuncs, cancel)
+			return nil
+		})
+
+		writer, err := conn.NextWriter(websocket.TextMessage)
+		if err != nil {
+			return
+		}
+		for {
+			select {
+			case <-ctx.Done():
+				fmt.Println("Writer stopped due to client shutdown")
+				return
+			case data := <-wsClient.writeChan:
+				if conn == nil {
+					wsClient.triggerReconnect()
+					return
+				}
+
+				if _, err := writer.Write(data.Data); err != nil {
+					wsClient.triggerReconnect()
+					return
+				}
+			}
+		}
+	}()
+
+	go func() {
+		ctx, cancel := context.WithCancel(context.Background())
+		wsClient.mu.WriteHandler(func() error {
+			wsClient.cancelFuncs = append(wsClient.cancelFuncs, cancel)
+			return nil
+		})
+
+		for {
+			select {
+			case <-ctx.Done():
+				fmt.Println("Reader stopped due to client shutdown")
+				return
+			default:
+				if conn == nil {
+					return
+				}
+				if err := conn.SetReadDeadline(time.Now().Add(readDeadline)); err != nil {
+					wsClient.triggerReconnect()
+					fmt.Printf("error on read deadline: %v\n", err)
+					return
+				}
+
+				mt, reader, err := conn.NextReader()
+				if err != nil {
+					wsClient.triggerReconnect()
+					return
+				}
+
+				if mt != websocket.TextMessage {
+					continue
+				}
+
+				readerBytes, err := io.ReadAll(reader)
+				if err != nil {
+					fmt.Printf("io reader failed: %v\n", err)
+					wsClient.triggerReconnect()
+					return
+				}
+				select {
+				case wsClient.dataChannel <- readerBytes:
+				case <-ctx.Done():
+					return
+				default:
+					fmt.Println("Data channel full, dropping message")
+				}
+
+			}
+
+		}
+	}()
+
 	return nil
 }
 
@@ -215,51 +343,14 @@ func (wsClient *SafeWebsocketClient) startPingTicker(ctx context.Context) {
 
 	for {
 		select {
+		case <-ctx.Done():
+			log.Println("ping ticker stopped")
+			return
 		case <-ticker.C:
-			wsClient.mu.WriteHandler(func() error {
+			wsClient.writeChan <- Message{
-				if wsClient.conn == nil {
+				MessageType: websocket.PingMessage,
-					return fmt.Errorf("connecrtion closed")
+				Data:        nil,
-				}
+			}
-				if err := wsClient.conn.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
-					log.Printf("Ping failed: %v. Will attempt reconnect.", err)
-					wsClient.triggerReconnect()
-				}
-				return nil
-			})
-		case <-ctx.Done():
-			log.Println("Ping ticker stopped due to context cancellation")
-			return
-		}
-	}
-}
-
-func (wsClient *SafeWebsocketClient) startReceiveHandler(ctx context.Context) {
-	for {
-		select {
-		case <-ctx.Done():
-			log.Println("Reconnect handler stopped")
-			return
-		default:
-			wsClient.mu.ReadHandler(func() error {
-				conn := wsClient.conn
-
-				if conn == nil {
-					wsClient.triggerReconnect()
-					return fmt.Errorf("connection closed")
-				}
-				_, message, err := conn.ReadMessage()
-				if err != nil {
-					wsClient.triggerReconnect()
-					return fmt.Errorf("failed to read message: %v", err)
-				}
-				select {
-				case wsClient.dataChannel <- message:
-				default:
-					log.Println("Data channel full, dropping message")
-				}
-				return nil
-			})
-
 		}
 	}
 }
@@ -275,20 +366,20 @@ func (wsClient *SafeWebsocketClient) reconnectHandler() {
 	backoff := 1 * time.Second
 	maxBackoff := 30 * time.Second
 	for {
-		if wsClient.ctx == nil {
-			continue
-		}
 		select {
 		case <-wsClient.reconnectCh:
 			log.Println("Reconnect triggered")
-			wsClient.mu.WriteHandler(func() error {
+
-				if wsClient.cancel != nil {
+			wsClient.mu.ReadHandler(func() error {
-					wsClient.cancel()
+				if wsClient.cancelFuncs != nil {
+					for _, cancel := range wsClient.cancelFuncs {
+						cancel()
+					}
 				}
-				wsClient.isConnected = false
 				return nil
 			})
 
+			wsClient.isConnected = false
 			time.Sleep(100 * time.Millisecond)
 
 			isInnerLoop := true
@@ -308,31 +399,65 @@ func (wsClient *SafeWebsocketClient) reconnectHandler() {
 					isInnerLoop = false
 					continue
 				case <-wsClient.ctx.Done():
+					log.Println("reconnect handler stopped due to client shutdown")
+					wsClient.Close()
 					return
 				}
 			}
+			if wsClient.reconnectChans != nil {
+				for _, reconnectCh := range wsClient.reconnectChans {
+					reconnectCh <- struct{}{}
+				}
+			}
 		case <-wsClient.ctx.Done():
-			log.Println("Reconnect handler stopped due to client shutdown")
+			log.Println("reconnect handler stopped due to client shutdown")
+			wsClient.Close()
 			return
 		}
 	}
 }
 
+func (wsClient *SafeWebsocketClient) ReconnectChannel() <-chan struct{} {
+	reconnectCh := make(chan struct{})
+	wsClient.mu.WriteHandler(func() error {
+		wsClient.reconnectChans = append(wsClient.reconnectChans, reconnectCh)
+		return nil
+	})
+
+	return reconnectCh
+}
+
 func (wsClient *SafeWebsocketClient) DataChannel() <-chan []byte {
 	return wsClient.dataChannel
 }
 
+func (wsClient *SafeWebsocketClient) Write(data []byte) error {
+	wsClient.writeChan <- Message{
+		MessageType: MessageTypeText,
+		Data:        data,
+	}
+	return nil
+}
+
 func (wsClient *SafeWebsocketClient) Close() error {
-	wsClient.mu.WriteHandler(func() error {
+	wsClient.mu.ReadHandler(func() error {
-		if wsClient.cancel != nil {
+		if wsClient.cancelFuncs != nil {
-			wsClient.cancel()
+			for _, cancel := range wsClient.cancelFuncs {
+				cancel()
+			}
 		}
-		if wsClient.conn != nil {
-			wsClient.conn.Close()
-		}
-		wsClient.isConnected = false
 		return nil
 	})
+
+	if wsClient.reconnectChans != nil {
+		for _, reconnectChan := range wsClient.reconnectChans {
+			close(reconnectChan)
+		}
+	}
+	if wsClient.conn != nil {
+		wsClient.conn.Close()
+	}
+	wsClient.isConnected = false
 	close(wsClient.dataChannel)
 
 	return nil

v1/examples/client/main.go

@@ -1,25 +1,50 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"log"
+	"os"
+	"os/signal"
+	"syscall"
 
 	"git.neurocipta.com/rogerferdinan/safe-web-socket/v1/client"
 )
 
 func main() {
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	go func() {
+		<-sigChan
+		fmt.Println("\nReceived interrupt signal. Shutting down gracefully...")
+		cancel()
+	}()
+
 	wsClient, err := client.NewSafeWebsocketClientBuilder().
 		BaseHost("localhost").
 		BasePort(8080).
 		Path("/ws/test/data_1").
 		UseTLS(false).
-		Build()
+		ChannelSize(30).
+		Build(ctx)
 	if err != nil {
 		log.Fatal(err)
 	}
+
+	go func() {
+		for range wsClient.ReconnectChannel() {
+			fmt.Println("Reconnection Success")
+		}
+	}()
+
 	dataChannel := wsClient.DataChannel()
 
 	for data := range dataChannel {
+		// _ = data
 		fmt.Println(string(data))
 	}
 }