fix: fixing shut down deadlock

go.mod

@@ -4,4 +4,6 @@ go 1.24.5
 
 require github.com/gorilla/websocket v1.5.3
 
-require git.neurocipta.com/rogerferdinan/custom-rwmutex v1.0.0 // indirect
+require git.neurocipta.com/rogerferdinan/custom-rwmutex v1.0.0
+
+require git.neurocipta.com/rogerferdinan/safe-map v0.0.0-20251011004629-ab0b119a7c48 // indirect

go.sum

@@ -1,4 +1,6 @@
 git.neurocipta.com/rogerferdinan/custom-rwmutex v1.0.0 h1:KnNc40SrYsg0cksIIcQy/ca6bunkGADQOs1u7O/E+iY=
 git.neurocipta.com/rogerferdinan/custom-rwmutex v1.0.0/go.mod h1:9DvvHc2UZhBwEs63NgO4IhiuHnBNtTuBkTJgiMnnCss=
+git.neurocipta.com/rogerferdinan/safe-map v0.0.0-20251011004629-ab0b119a7c48 h1:4wXSbEuwFd2gycaaGP35bjUkKEEO6WcVfJ6cetEyT5s=
+git.neurocipta.com/rogerferdinan/safe-map v0.0.0-20251011004629-ab0b119a7c48/go.mod h1:QtIxG0BYCCq8a5qyklpSHA8qWUvKr+mfl42qF9QxTc0=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=

internal/hub.go

@@ -1,7 +1,6 @@
 package internal
 
 import (
-	"fmt"
 	"log"
 	"time"
 
@@ -24,9 +23,9 @@ type Client struct {
 func NewClient(conn *websocket.Conn, subscribedPath string) *Client {
 	return &Client{
 		Conn:           conn,
-		Send:           make(chan []byte, 64),
+		Send:           make(chan []byte, 2),
 		SubscribedPath: subscribedPath,
-		done:           make(chan struct{}),
+		done:           make(chan struct{}, 1),
 	}
 }
 
@@ -39,10 +38,10 @@ type Hub struct {
 
 func NewHub() *Hub {
 	return &Hub{
-		Broadcast:  make(chan []byte),
+		Broadcast:  make(chan []byte, 1),
-		Register:   make(chan *Client),
+		Register:   make(chan *Client, 1),
-		Unregister: make(chan *Client),
+		Unregister: make(chan *Client, 1),
-		Clients:    make(map[*Client]bool),
+		Clients:    make(map[*Client]bool, 0),
 	}
 }
 
@@ -118,14 +117,14 @@ func ReadPump(c *Client, h *Hub) {
 	for {
 		messageType, message, err := c.Conn.ReadMessage()
 		if err != nil {
-			if !websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
+			if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
 				log.Printf("WebSocket error: %v", err)
 			}
 			break
 		}
 
 		if messageType == websocket.TextMessage {
-			fmt.Printf("Received: %s\n", message)
+			log.Printf("Received: %s\n", message)
 		}
 	}
 }

v1/client/client.go

@@ -6,62 +6,31 @@ import (
 	"log"
 	"net/url"
 	"strings"
-	"sync"
 	"time"
 
 	custom_rwmutex "git.neurocipta.com/rogerferdinan/custom-rwmutex"
+	safemap "git.neurocipta.com/rogerferdinan/safe-map"
 	"git.neurocipta.com/rogerferdinan/safe-web-socket/internal"
 	"github.com/gorilla/websocket"
 )
 
 const (
-	pingPeriod = 10 * time.Second
+	pingPeriod   = 10 * time.Second
+	readDeadline = 30 * time.Second
 )
 
-type SafeMap[K comparable, V any] struct {
+type MessageType uint
-	m sync.Map
-}
 
-func NewSafeMap[K comparable, V any]() *SafeMap[K, V] {
+const (
-	return &SafeMap[K, V]{
+	MessageTypeText  MessageType = websocket.TextMessage
-		m: sync.Map{},
+	MessageTypePing  MessageType = websocket.PingMessage
-	}
+	MessageTypePong  MessageType = websocket.PongMessage
-}
+	MessageTypeClose MessageType = websocket.CloseMessage
+)
 
-func (sm *SafeMap[K, V]) Store(key K, value V) {
+type Message struct {
-	sm.m.Store(key, value)
+	MessageType MessageType
-}
+	Data        []byte
-
-func (sm *SafeMap[K, V]) Load(key K) (value V, ok bool) {
-	val, loaded := sm.m.Load(key)
-	if !loaded {
-		return *new(V), false
-	}
-	return val.(V), true
-}
-
-func (sm *SafeMap[K, V]) Delete(key K) {
-	sm.m.Delete(key)
-}
-
-func (sm *SafeMap[K, V]) Range(f func(K, V) bool) {
-	sm.m.Range(func(key, value any) bool {
-		k, ok1 := key.(K)
-		v, ok2 := value.(V)
-		if !ok1 || !ok2 {
-			return true
-		}
-		return f(k, v)
-	})
-}
-
-func (sm *SafeMap[K, V]) Len() int {
-	count := 0
-	sm.Range(func(_ K, _ V) bool {
-		count++
-		return true
-	})
-	return count
 }
 
 type SafeWebsocketClientBuilder struct {
@@ -69,6 +38,7 @@ type SafeWebsocketClientBuilder struct {
 	basePort    *uint16 `nil_checker:"required"`
 	path        *string
 	rawQuery    *string
+	isDrop      *bool
 	useTLS      *bool
 	channelSize *int64
 }
@@ -102,6 +72,11 @@ func (b *SafeWebsocketClientBuilder) RawQuery(rawQuery string) *SafeWebsocketCli
 	return b
 }
 
+func (b *SafeWebsocketClientBuilder) IsDrop(isDrop bool) *SafeWebsocketClientBuilder {
+	b.isDrop = &isDrop
+	return b
+}
+
 func (b *SafeWebsocketClientBuilder) ChannelSize(channelSize int64) *SafeWebsocketClientBuilder {
 	b.channelSize = &channelSize
 	return b
@@ -112,9 +87,15 @@ func (b *SafeWebsocketClientBuilder) Build(ctx context.Context) (*SafeWebsocketC
 		return nil, err
 	}
 
-	var useTLS bool
+	// var useTLS bool
-	if b.useTLS != nil {
+	if b.useTLS == nil {
-		useTLS = *b.useTLS
+		useTLS := true
+		b.useTLS = &useTLS
+	}
+
+	if b.isDrop == nil {
+		isDrop := true
+		b.isDrop = &isDrop
 	}
 
 	if b.channelSize == nil {
@@ -125,7 +106,8 @@ func (b *SafeWebsocketClientBuilder) Build(ctx context.Context) (*SafeWebsocketC
 	wsClient := SafeWebsocketClient{
 		baseHost:    *b.baseHost,
 		basePort:    *b.basePort,
-		useTLS:      useTLS,
+		useTLS:      *b.useTLS,
+		isDrop:      *b.isDrop,
 		path:        b.path,
 		rawQuery:    b.rawQuery,
 		dataChannel: make(chan []byte, *b.channelSize),
@@ -133,7 +115,8 @@ func (b *SafeWebsocketClientBuilder) Build(ctx context.Context) (*SafeWebsocketC
 		ctx:         ctx,
 		reconnectCh: make(chan struct{}, 1),
 		isConnected: false,
-		doneMap:     NewSafeMap[string, chan struct{}](),
+		doneMap:     safemap.NewSafeMap[string, chan struct{}](),
+		writeChan:   make(chan Message, 1),
 	}
 
 	go wsClient.reconnectHandler()
@@ -146,20 +129,26 @@ func (b *SafeWebsocketClientBuilder) Build(ctx context.Context) (*SafeWebsocketC
 }
 
 type SafeWebsocketClient struct {
-	baseHost       string
+	baseHost string
-	basePort       uint16
+	basePort uint16
-	useTLS         bool
+	isDrop   bool
-	path           *string
+	useTLS   bool
-	rawQuery       *string
+	path     *string
-	dataChannel    chan []byte
+	rawQuery *string
-	mu             *custom_rwmutex.CustomRwMutex
+
-	conn           *websocket.Conn
+	mu          *custom_rwmutex.CustomRwMutex
-	cancelFuncs    []context.CancelFunc
+	conn        *websocket.Conn
-	ctx            context.Context
+	ctx         context.Context
+	cancelFuncs []context.CancelFunc
+	dataChannel chan []byte
+
 	reconnectCh    chan struct{}
 	reconnectChans []chan struct{}
 	isConnected    bool
-	doneMap        *SafeMap[string, chan struct{}]
+	doneMap        *safemap.SafeMap[string, chan struct{}]
+
+	writeChan chan Message
+	pongChan  chan error
 }
 
 func (wsClient *SafeWebsocketClient) connect() error {
@@ -187,41 +176,161 @@ func (wsClient *SafeWebsocketClient) connect() error {
 		return fmt.Errorf("failed to connect to %s: %w", wsClient.baseHost, err)
 	}
 
-	conn.SetPingHandler(func(pingData string) error {
+	pingCtx, pingCancel := context.WithCancel(context.Background())
-		if err := conn.WriteMessage(websocket.PongMessage, []byte(pingData)); err != nil {
-			if err == websocket.ErrCloseSent {
-				return nil
-			}
-			if netErr, ok := err.(interface{ Timeout() bool }); ok && netErr.Timeout() {
-				return nil
-			}
-			return err
-		}
-		return nil
-	})
-
 	wsClient.mu.WriteHandler(func() error {
-		if wsClient.conn != nil {
-			wsClient.conn.Close()
-		}
-
-		wsClient.conn = conn
-
-		wsClient.isConnected = true
-
-		pingCtx, pingCancel := context.WithCancel(context.Background())
-		go wsClient.startPingTicker(pingCtx)
 		wsClient.cancelFuncs = append(wsClient.cancelFuncs, pingCancel)
-
-		receiverCtx, receiverCancel := context.WithCancel(context.Background())
-		go wsClient.startReceiveHandler(receiverCtx)
-		wsClient.cancelFuncs = append(wsClient.cancelFuncs, receiverCancel)
-
 		return nil
 	})
+
+	go wsClient.startPingTicker(pingCtx)
+
+	if wsClient.conn != nil {
+		wsClient.conn.Close()
+	}
+	wsClient.conn = conn
+	wsClient.isConnected = true
+
+	go wsClient.writePump()
+	go wsClient.readPump()
+
+	conn.SetPingHandler(func(pingData string) error {
+		wsClient.writeChan <- Message{
+			MessageType: MessageTypePong,
+			Data:        []byte(pingData),
+		}
+
+		select {
+		case err := <-wsClient.pongChan:
+			return err
+		default:
+		}
+		return nil
+	})
+
 	return nil
 }
 
+func (wsClient *SafeWebsocketClient) writePump() {
+	ctx, cancel := context.WithCancel(context.Background())
+	wsClient.mu.WriteHandler(func() error {
+		wsClient.cancelFuncs = append(wsClient.cancelFuncs, cancel)
+		return nil
+	})
+
+	var c *websocket.Conn
+	wsClient.mu.ReadHandler(func() error {
+		c = wsClient.conn
+		return nil
+	})
+
+	for {
+		select {
+		case <-ctx.Done():
+			log.Println("Writer canceled by context")
+			return
+		case data := <-wsClient.writeChan:
+			if c == nil {
+				return
+			}
+
+			if err := c.WriteMessage(int(data.MessageType), data.Data); err != nil {
+				log.Printf("error on write message: %v\n", err)
+				if data.MessageType == MessageTypePong {
+					wsClient.pongChan <- err
+				}
+				return
+			}
+		}
+	}
+}
+
+func (wsClient *SafeWebsocketClient) readPump() {
+	ctx, cancel := context.WithCancel(context.Background())
+	wsClient.mu.WriteHandler(func() error {
+		wsClient.cancelFuncs = append(wsClient.cancelFuncs, cancel)
+		return nil
+	})
+
+	var c *websocket.Conn
+	wsClient.mu.ReadHandler(func() error {
+		c = wsClient.conn
+		return nil
+	})
+
+	if wsClient.isDrop {
+		for {
+			select {
+			case <-ctx.Done():
+				log.Println("Reader canceled by context")
+				return
+			default:
+				if c == nil {
+					return
+				}
+
+				if err := c.SetReadDeadline(time.Now().Add(readDeadline)); err != nil {
+					log.Printf("error on read deadline: %v\n", err)
+					return
+				}
+
+				messageType, data, err := c.ReadMessage()
+				if err != nil {
+					log.Printf("error on read message: %v\n", err)
+					wsClient.triggerReconnect()
+					return
+				}
+
+				if messageType != websocket.TextMessage {
+					continue
+				}
+
+				select {
+				case wsClient.dataChannel <- data:
+				case <-ctx.Done():
+					return
+				default:
+					log.Println("Data channel full, dropping message")
+				}
+			}
+		}
+	} else {
+		for {
+			select {
+			case <-ctx.Done():
+				log.Println("Reader canceled by context")
+				return
+			default:
+				if c == nil {
+					return
+				}
+
+				if err := c.SetReadDeadline(time.Now().Add(readDeadline)); err != nil {
+					log.Printf("error on read deadline: %v\n", err)
+					return
+				}
+
+				messageType, data, err := c.ReadMessage()
+				if err != nil {
+					log.Printf("error on read message: %v\n", err)
+					wsClient.triggerReconnect()
+					return
+				}
+
+				if messageType != websocket.TextMessage {
+					continue
+				}
+
+				select {
+				case wsClient.dataChannel <- data:
+				case <-ctx.Done():
+					return
+				}
+			}
+		}
+	}
+
+}
+
 func (wsClient *SafeWebsocketClient) startPingTicker(ctx context.Context) {
 	ticker := time.NewTicker(pingPeriod)
 	defer ticker.Stop()
@@ -229,53 +338,12 @@ func (wsClient *SafeWebsocketClient) startPingTicker(ctx context.Context) {
 	for {
 		select {
 		case <-ctx.Done():
-			log.Println("ping ticker stopped")
+			log.Println("ping ticker canceled by context")
 			return
 		case <-ticker.C:
-			wsClient.mu.WriteHandler(func() error {
+			wsClient.writeChan <- Message{
-				if wsClient.conn == nil {
+				MessageType: websocket.PingMessage,
-					return fmt.Errorf("connection closed")
+				Data:        []byte{},
-				}
-				if err := wsClient.conn.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
-					log.Printf("Ping failed: %v. Will attempt reconnect.", err)
-					wsClient.triggerReconnect()
-				}
-				return nil
-			})
-		}
-	}
-}
-
-func (wsClient *SafeWebsocketClient) startReceiveHandler(ctx context.Context) {
-	for {
-		select {
-		case <-ctx.Done():
-			log.Println("receive handler stopped")
-			return
-		default:
-			if err := 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:
-				case <-ctx.Done():
-					log.Println("Reconnect handler stopped")
-					return nil
-				default:
-					log.Println("Data channel full, dropping message")
-				}
-				return nil
-			}); err != nil {
-				return
 			}
 		}
 	}
@@ -295,13 +363,18 @@ func (wsClient *SafeWebsocketClient) reconnectHandler() {
 		select {
 		case <-wsClient.reconnectCh:
 			log.Println("Reconnect triggered")
-			if wsClient.cancelFuncs != nil {
+
-				for _, cancel := range wsClient.cancelFuncs {
+			wsClient.mu.ReadHandler(func() error {
-					cancel()
+				if wsClient.cancelFuncs != nil {
+					for _, cancel := range wsClient.cancelFuncs {
+						cancel()
+					}
 				}
-			}
+				return nil
+			})
+
 			wsClient.isConnected = false
-			time.Sleep(100 * time.Millisecond)
+			// time.Sleep(100 * time.Millisecond)
 
 			isInnerLoop := true
 			for isInnerLoop {
@@ -320,6 +393,8 @@ func (wsClient *SafeWebsocketClient) reconnectHandler() {
 					isInnerLoop = false
 					continue
 				case <-wsClient.ctx.Done():
+					log.Println("reconnect handler stopped due to client shutdown")
+					wsClient.Close()
 					return
 				}
 			}
@@ -337,7 +412,7 @@ func (wsClient *SafeWebsocketClient) reconnectHandler() {
 }
 
 func (wsClient *SafeWebsocketClient) ReconnectChannel() <-chan struct{} {
-	reconnectCh := make(chan struct{})
+	reconnectCh := make(chan struct{}, 1)
 	wsClient.mu.WriteHandler(func() error {
 		wsClient.reconnectChans = append(wsClient.reconnectChans, reconnectCh)
 		return nil
@@ -350,31 +425,37 @@ func (wsClient *SafeWebsocketClient) DataChannel() <-chan []byte {
 	return wsClient.dataChannel
 }
 
-func (wsClient *SafeWebsocketClient) WriteJSON(message any) error {
+func (wsClient *SafeWebsocketClient) CloseDataChannel() {
-	return wsClient.mu.WriteHandler(func() error {
+	close(wsClient.dataChannel)
-		return wsClient.conn.WriteJSON(message)
+}
-	})
+
+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.cancelFuncs != nil {
 			for _, cancel := range wsClient.cancelFuncs {
 				cancel()
 			}
 		}
-
-		if wsClient.reconnectChans != nil {
-			for _, reconnectChan := range wsClient.reconnectChans {
-				close(reconnectChan)
-			}
-		}
-		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

@@ -29,6 +29,7 @@ func main() {
 		BasePort(8080).
 		Path("/ws/test/data_1").
 		UseTLS(false).
+		ChannelSize(30).
 		Build(ctx)
 	if err != nil {
 		log.Fatal(err)
@@ -43,6 +44,7 @@ func main() {
 	dataChannel := wsClient.DataChannel()
 
 	for data := range dataChannel {
+		// _ = data
 		fmt.Println(string(data))
 	}
 }