diff --git a/client-connection-handler.go b/client-connection-handler.go
new file mode 100644
index 0000000..4b5505c
--- /dev/null
+++ b/client-connection-handler.go
@@ -0,0 +1,42 @@
+package server
+
+import (
+	"time"
+)
+
+type ClientConnectionHandler interface {
+	ConnectionHandler
+	GetReconnectInterval() time.Duration
+	GetReconnectTryTime() int
+}
+
+type ClientConnectionHandlers struct {
+	ConnectionHandlers
+
+	ReconnectInterval time.Duration
+	ReconnectTryTime  int
+}
+
+func (cch *ClientConnectionHandlers) GetReconnectInterval() time.Duration {
+	return cch.ReconnectInterval
+}
+
+func (cch *ClientConnectionHandlers) GetReconnectTryTime() int {
+	return cch.ReconnectTryTime
+}
+
+func (cch *ClientConnectionHandlers) Validate() error {
+	if err := cch.ConnectionHandlers.Validate(); nil != err {
+		return err
+	}
+
+	if cch.ReconnectInterval <= 0 {
+		cch.ReconnectInterval = DefaultReconnectInterval
+	}
+
+	if cch.ReconnectTryTime <= 0 {
+		cch.ReconnectTryTime = DefaultReconnectTryTime
+	}
+
+	return nil
+}
diff --git a/client-rwc-handler.go b/client-rwc-handler.go
new file mode 100644
index 0000000..9451d29
--- /dev/null
+++ b/client-rwc-handler.go
@@ -0,0 +1,70 @@
+package server
+
+import (
+	"io"
+	"sync"
+
+	logging "git.loafle.net/commons/logging-go"
+)
+
+type ClientRWCHandler struct {
+	ReadwriteHandler ReadWriteHandler
+	ReadChan         chan<- []byte
+	WriteChan        <-chan []byte
+	DisconnectedChan chan<- struct{}
+	ReconnectedChan  <-chan *Conn
+	ClientStopChan   <-chan struct{}
+	ClientStopWg     *sync.WaitGroup
+}
+
+func (crwch *ClientRWCHandler) HandleConnection(conn *Conn) {
+
+	defer func() {
+		if nil != conn {
+			conn.Close()
+		}
+		logging.Logger().Infof("disconnected")
+		crwch.ClientStopWg.Done()
+	}()
+
+	logging.Logger().Infof("connected")
+
+	stopChan := make(chan struct{})
+
+	readerDoneChan := make(chan error)
+	writerDoneChan := make(chan error)
+
+	var err error
+
+	for {
+		if nil != err {
+			if io.EOF == err || io.ErrUnexpectedEOF == err {
+				crwch.DisconnectedChan <- struct{}{}
+				newConn := <-crwch.ReconnectedChan
+				if nil == newConn {
+					return
+				}
+				conn = newConn
+			} else {
+				return
+			}
+		}
+
+		go connReadHandler(crwch.ReadwriteHandler, conn, stopChan, readerDoneChan, crwch.ReadChan)
+		go connWriteHandler(crwch.ReadwriteHandler, conn, stopChan, writerDoneChan, crwch.WriteChan)
+
+		select {
+		case err = <-readerDoneChan:
+			close(stopChan)
+			<-writerDoneChan
+		case err = <-writerDoneChan:
+			close(stopChan)
+			<-readerDoneChan
+		case <-crwch.ClientStopChan:
+			close(stopChan)
+			<-readerDoneChan
+			<-writerDoneChan
+			return
+		}
+	}
+}
diff --git a/connection-handler.go b/connection-handler.go
new file mode 100644
index 0000000..20bca64
--- /dev/null
+++ b/connection-handler.go
@@ -0,0 +1,65 @@
+package server
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net"
+	"time"
+)
+
+type ConnectionHandler interface {
+	GetConcurrency() int
+	GetKeepAlive() time.Duration
+	GetHandshakeTimeout() time.Duration
+	GetTLSConfig() *tls.Config
+
+	Listener(serverCtx ServerCtx) (net.Listener, error)
+}
+
+type ConnectionHandlers struct {
+	ConnectionHandler
+
+	// The maximum number of concurrent connections the server may serve.
+	//
+	// DefaultConcurrency is used if not set.
+	Concurrency      int
+	KeepAlive        time.Duration
+	HandshakeTimeout time.Duration
+	TLSConfig        *tls.Config
+}
+
+func (ch *ConnectionHandlers) Listener(serverCtx ServerCtx) (net.Listener, error) {
+	return nil, fmt.Errorf("Method[ConnectionHandler.Listener] is not implemented")
+}
+
+func (ch *ConnectionHandlers) GetConcurrency() int {
+	return ch.Concurrency
+}
+
+func (ch *ConnectionHandlers) GetKeepAlive() time.Duration {
+	return ch.KeepAlive
+}
+
+func (ch *ConnectionHandlers) GetHandshakeTimeout() time.Duration {
+	return ch.HandshakeTimeout
+}
+
+func (ch *ConnectionHandlers) GetTLSConfig() *tls.Config {
+	return ch.TLSConfig
+}
+
+func (ch *ConnectionHandlers) Validate() error {
+	if ch.Concurrency <= 0 {
+		ch.Concurrency = DefaultConcurrency
+	}
+
+	if ch.KeepAlive <= 0 {
+		ch.KeepAlive = DefaultKeepAlive
+	}
+
+	if ch.HandshakeTimeout <= 0 {
+		ch.HandshakeTimeout = DefaultHandshakeTimeout
+	}
+
+	return nil
+}
diff --git a/const.go b/const.go
index a31a1c5..d7179f3 100644
--- a/const.go
+++ b/const.go
@@ -30,4 +30,7 @@ const (
 	DefaultPingTimeout = 10 * time.Second
 	// DefaultPingPeriod is default value of send ping period
 	DefaultPingPeriod = (DefaultPingTimeout * 9) / 10
+
+	DefaultReconnectInterval = 1 * time.Second
+	DefaultReconnectTryTime  = 10
 )
diff --git a/fasthttp/websocket/client.go b/fasthttp/websocket/client.go
index 26e0308..58f0d6e 100644
--- a/fasthttp/websocket/client.go
+++ b/fasthttp/websocket/client.go
@@ -23,6 +23,9 @@ import (
 var errMalformedURL = errors.New("malformed ws or wss URL")
 
 type Client struct {
+	server.ClientConnectionHandlers
+	server.ReadWriteHandlers
+
 	Name string
 
 	URL string
@@ -44,46 +47,18 @@ type Client struct {
 	// If Proxy is nil or returns a nil *URL, no proxy is used.
 	Proxy func(*http.Request) (*url.URL, error)
 
-	TLSConfig        *tls.Config
-	HandshakeTimeout time.Duration
-	// ReadBufferSize and WriteBufferSize specify I/O buffer sizes. If a buffer
-	// size is zero, then a useful default size is used. The I/O buffer sizes
-	// do not limit the size of the messages that can be sent or received.
-	ReadBufferSize, WriteBufferSize int
-	// Subprotocols specifies the client's requested subprotocols.
-
-	// EnableCompression specifies if the client should attempt to negotiate
-	// per message compression (RFC 7692). Setting this value to true does not
-	// guarantee that compression will be supported. Currently only "no context
-	// takeover" modes are supported.
-	EnableCompression bool
-
-	// MaxMessageSize is the maximum size for a message read from the peer. If a
-	// message exceeds the limit, the connection sends a close frame to the peer
-	// and returns ErrReadLimit to the application.
-	MaxMessageSize int64
-	// WriteTimeout is the write deadline on the underlying network
-	// connection. After a write has timed out, the websocket state is corrupt and
-	// all future writes will return an error. A zero value for t means writes will
-	// not time out.
-	WriteTimeout time.Duration
-	// ReadTimeout is the read deadline on the underlying network connection.
-	// After a read has timed out, the websocket connection state is corrupt and
-	// all future reads will return an error. A zero value for t means reads will
-	// not time out.
-	ReadTimeout time.Duration
-
-	PongTimeout time.Duration
-	PingTimeout time.Duration
-	PingPeriod  time.Duration
-
 	serverURL *url.URL
 
-	stopChan  chan struct{}
-	stopWg    sync.WaitGroup
-	conn      *server.Conn
+	stopChan chan struct{}
+	stopWg   sync.WaitGroup
+
 	readChan  chan []byte
 	writeChan chan []byte
+
+	disconnectedChan chan struct{}
+	reconnectedChan  chan *server.Conn
+
+	crwch server.ClientRWCHandler
 }
 
 func (c *Client) Connect() (readChan <-chan []byte, writeChan chan<- []byte, res *http.Response, err error) {
@@ -107,10 +82,20 @@ func (c *Client) Connect() (readChan <-chan []byte, writeChan chan<- []byte, res
 
 	c.readChan = make(chan []byte, 256)
 	c.writeChan = make(chan []byte, 256)
-
+	c.disconnectedChan = make(chan struct{})
+	c.reconnectedChan = make(chan *server.Conn)
 	c.stopChan = make(chan struct{})
+
+	c.crwch.ReadwriteHandler = c
+	c.crwch.ReadChan = c.readChan
+	c.crwch.WriteChan = c.writeChan
+	c.crwch.ClientStopChan = c.stopChan
+	c.crwch.ClientStopWg = &c.stopWg
+	c.crwch.DisconnectedChan = c.disconnectedChan
+	c.crwch.ReconnectedChan = c.reconnectedChan
+
 	c.stopWg.Add(1)
-	go c.handleConnection(conn)
+	go c.crwch.HandleConnection(conn)
 
 	return c.readChan, c.writeChan, res, nil
 }
@@ -144,124 +129,6 @@ func (c *Client) connect() (*server.Conn, *http.Response, error) {
 	return conn, res, nil
 }
 
-func (c *Client) handleConnection(conn *server.Conn) {
-	defer func() {
-		if nil != conn {
-			conn.Close()
-		}
-		logging.Logger().Infof(c.clientMessage("disconnected"))
-		c.stopWg.Done()
-	}()
-
-	logging.Logger().Infof(c.clientMessage("connected"))
-
-	stopChan := make(chan struct{})
-
-	readerDoneChan := make(chan struct{})
-	writerDoneChan := make(chan struct{})
-
-	go handleClientRead(c, conn, stopChan, readerDoneChan)
-	go handleClientWrite(c, conn, stopChan, writerDoneChan)
-
-	select {
-	case <-readerDoneChan:
-		close(stopChan)
-		<-writerDoneChan
-	case <-writerDoneChan:
-		close(stopChan)
-		<-readerDoneChan
-	case <-c.stopChan:
-		close(stopChan)
-		<-readerDoneChan
-		<-writerDoneChan
-	}
-}
-
-func handleClientRead(c *Client, conn *server.Conn, stopChan <-chan struct{}, doneChan chan<- struct{}) {
-	defer func() {
-		doneChan <- struct{}{}
-	}()
-
-	if 0 < c.MaxMessageSize {
-		conn.SetReadLimit(c.MaxMessageSize)
-	}
-	if 0 < c.ReadTimeout {
-		conn.SetReadDeadline(time.Now().Add(c.ReadTimeout))
-	}
-	conn.SetPongHandler(func(string) error {
-		conn.SetReadDeadline(time.Now().Add(c.PongTimeout))
-		return nil
-	})
-
-	var (
-		message []byte
-		err     error
-	)
-
-	for {
-		readMessageChan := make(chan struct{})
-
-		go func() {
-			_, message, err = conn.ReadMessage()
-			close(readMessageChan)
-		}()
-
-		select {
-		case <-stopChan:
-			<-readMessageChan
-			return
-		case <-readMessageChan:
-		}
-
-		if nil != err {
-			if server.IsUnexpectedCloseError(err, server.CloseGoingAway, server.CloseAbnormalClosure) {
-				logging.Logger().Debugf(c.clientMessage(fmt.Sprintf("Read error %v", err)))
-			}
-			return
-		}
-
-		c.readChan <- message
-	}
-}
-
-func handleClientWrite(c *Client, conn *server.Conn, stopChan <-chan struct{}, doneChan chan<- struct{}) {
-	defer func() {
-		doneChan <- struct{}{}
-	}()
-
-	ticker := time.NewTicker(c.PingPeriod)
-	defer func() {
-		ticker.Stop()
-	}()
-	for {
-		select {
-		case message, ok := <-c.writeChan:
-			conn.SetWriteDeadline(time.Now().Add(c.WriteTimeout))
-			if !ok {
-				conn.WriteMessage(server.CloseMessage, []byte{})
-				return
-			}
-
-			w, err := conn.NextWriter(server.TextMessage)
-			if err != nil {
-				return
-			}
-			w.Write(message)
-
-			if err := w.Close(); nil != err {
-				return
-			}
-		case <-ticker.C:
-			conn.SetWriteDeadline(time.Now().Add(c.PingTimeout))
-			if err := conn.WriteMessage(server.PingMessage, nil); nil != err {
-				return
-			}
-		case <-stopChan:
-			return
-		}
-	}
-}
-
 func (c *Client) Dial() (*server.Conn, *http.Response, error) {
 	var (
 		err          error
@@ -476,6 +343,13 @@ func (c *Client) Dial() (*server.Conn, *http.Response, error) {
 }
 
 func (c *Client) Validate() error {
+	if err := c.ClientConnectionHandlers.Validate(); nil != err {
+		return err
+	}
+	if err := c.ReadWriteHandlers.Validate(); nil != err {
+		return err
+	}
+
 	if "" == c.Name {
 		c.Name = "Client"
 	}
@@ -507,34 +381,6 @@ func (c *Client) Validate() error {
 		c.Proxy = http.ProxyFromEnvironment
 	}
 
-	if c.HandshakeTimeout <= 0 {
-		c.HandshakeTimeout = server.DefaultHandshakeTimeout
-	}
-	if c.MaxMessageSize <= 0 {
-		c.MaxMessageSize = server.DefaultMaxMessageSize
-	}
-	if c.ReadBufferSize <= 0 {
-		c.ReadBufferSize = server.DefaultReadBufferSize
-	}
-	if c.WriteBufferSize <= 0 {
-		c.WriteBufferSize = server.DefaultWriteBufferSize
-	}
-	if c.ReadTimeout <= 0 {
-		c.ReadTimeout = server.DefaultReadTimeout
-	}
-	if c.WriteTimeout <= 0 {
-		c.WriteTimeout = server.DefaultWriteTimeout
-	}
-	if c.PongTimeout <= 0 {
-		c.PongTimeout = server.DefaultPongTimeout
-	}
-	if c.PingTimeout <= 0 {
-		c.PingTimeout = server.DefaultPingTimeout
-	}
-	if c.PingPeriod <= 0 {
-		c.PingPeriod = server.DefaultPingPeriod
-	}
-
 	return nil
 }
 
diff --git a/fasthttp/websocket/server.go b/fasthttp/websocket/server.go
index 779e86d..0142c4e 100644
--- a/fasthttp/websocket/server.go
+++ b/fasthttp/websocket/server.go
@@ -6,7 +6,6 @@ import (
 	"net"
 	"net/http"
 	"sync"
-	"time"
 
 	"git.loafle.net/commons/logging-go"
 	"git.loafle.net/commons/server-go"
@@ -16,14 +15,14 @@ import (
 type Server struct {
 	ServerHandler ServerHandler
 
-	ctx server.ServerCtx
+	ctx      server.ServerCtx
+	stopChan chan struct{}
+	stopWg   sync.WaitGroup
+
+	srwch server.ServerRWCHandler
 
 	hs       *fasthttp.Server
 	upgrader *Upgrader
-
-	connections sync.Map
-	stopChan    chan struct{}
-	stopWg      sync.WaitGroup
 }
 
 func (s *Server) ListenAndServe() error {
@@ -59,7 +58,7 @@ func (s *Server) ListenAndServe() error {
 		HandshakeTimeout:  s.ServerHandler.GetHandshakeTimeout(),
 		ReadBufferSize:    s.ServerHandler.GetReadBufferSize(),
 		WriteBufferSize:   s.ServerHandler.GetWriteBufferSize(),
-		CheckOrigin:       s.ServerHandler.CheckOrigin,
+		CheckOrigin:       s.ServerHandler.(ServerHandler).CheckOrigin,
 		Error:             s.onError,
 		EnableCompression: s.ServerHandler.IsEnableCompression(),
 	}
@@ -73,13 +72,18 @@ func (s *Server) ListenAndServe() error {
 	}
 
 	s.stopChan = make(chan struct{})
+
+	s.srwch.ReadwriteHandler = s.ServerHandler
+	s.srwch.ServerStopChan = s.stopChan
+	s.srwch.ServerStopWg = &s.stopWg
+
 	s.stopWg.Add(1)
 	return s.handleServer(listener)
 }
 
 func (s *Server) Shutdown(ctx context.Context) error {
 	if s.stopChan == nil {
-		return fmt.Errorf(s.serverMessage("server must be started before stopping it"))
+		return fmt.Errorf("server must be started before stopping it")
 	}
 	close(s.stopChan)
 	s.stopWg.Wait()
@@ -91,15 +95,6 @@ func (s *Server) Shutdown(ctx context.Context) error {
 	return nil
 }
 
-func (s *Server) ConnectionSize() int {
-	var sz int
-	s.connections.Range(func(k, v interface{}) bool {
-		sz++
-		return true
-	})
-	return sz
-}
-
 func (s *Server) serverMessage(msg string) string {
 	return fmt.Sprintf("Server[%s]: %s", s.ServerHandler.GetName(), msg)
 }
@@ -162,7 +157,7 @@ func (s *Server) httpHandler(ctx *fasthttp.RequestCtx) {
 	)
 
 	if 0 < s.ServerHandler.GetConcurrency() {
-		sz := s.ConnectionSize()
+		sz := s.srwch.ConnectionSize()
 		if sz >= s.ServerHandler.GetConcurrency() {
 			logging.Logger().Warnf(s.serverMessage(fmt.Sprintf("max connections size %d, refuse", sz)))
 			s.onError(ctx, fasthttp.StatusServiceUnavailable, err)
@@ -170,7 +165,7 @@ func (s *Server) httpHandler(ctx *fasthttp.RequestCtx) {
 		}
 	}
 
-	if servlet = s.ServerHandler.Servlet(path); nil == servlet {
+	if servlet = s.ServerHandler.(ServerHandler).Servlet(path); nil == servlet {
 		s.onError(ctx, fasthttp.StatusInternalServerError, err)
 		return
 	}
@@ -190,154 +185,10 @@ func (s *Server) httpHandler(ctx *fasthttp.RequestCtx) {
 		}
 
 		s.stopWg.Add(1)
-		go s.handleConnection(servlet, servletCtx, conn)
+		go s.srwch.HandleConnection(servlet, servletCtx, conn)
 	})
 }
 
-func (s *Server) handleConnection(servlet Servlet, servletCtx server.ServletCtx, conn *server.Conn) {
-	addr := conn.RemoteAddr()
-
-	defer func() {
-		if nil != conn {
-			conn.Close()
-		}
-		servlet.OnDisconnect(servletCtx)
-		logging.Logger().Infof(s.serverMessage(fmt.Sprintf("Client[%s] has been disconnected", addr)))
-		s.stopWg.Done()
-	}()
-
-	logging.Logger().Infof(s.serverMessage(fmt.Sprintf("Client[%s] has been connected", addr)))
-
-	s.connections.Store(conn, true)
-	defer s.connections.Delete(conn)
-
-	servlet.OnConnect(servletCtx, conn)
-	conn.SetCloseHandler(func(code int, text string) error {
-		logging.Logger().Debugf("close")
-		return nil
-	})
-
-	stopChan := make(chan struct{})
-	servletDoneChan := make(chan struct{})
-
-	readChan := make(chan []byte)
-	writeChan := make(chan []byte)
-
-	readerDoneChan := make(chan struct{})
-	writerDoneChan := make(chan struct{})
-
-	go servlet.Handle(servletCtx, stopChan, servletDoneChan, readChan, writeChan)
-	go handleRead(s, conn, stopChan, readerDoneChan, readChan)
-	go handleWrite(s, conn, stopChan, writerDoneChan, writeChan)
-
-	select {
-	case <-readerDoneChan:
-		close(stopChan)
-		<-writerDoneChan
-		<-servletDoneChan
-	case <-writerDoneChan:
-		close(stopChan)
-		<-readerDoneChan
-		<-servletDoneChan
-	case <-servletDoneChan:
-		close(stopChan)
-		<-readerDoneChan
-		<-writerDoneChan
-	case <-s.stopChan:
-		close(stopChan)
-		<-readerDoneChan
-		<-writerDoneChan
-		<-servletDoneChan
-	}
-}
-
 func (s *Server) onError(ctx *fasthttp.RequestCtx, status int, reason error) {
-	s.ServerHandler.OnError(s.ctx, ctx, status, reason)
-}
-
-func handleRead(s *Server, conn *server.Conn, stopChan <-chan struct{}, doneChan chan<- struct{}, readChan chan []byte) {
-	defer func() {
-		doneChan <- struct{}{}
-	}()
-
-	if 0 < s.ServerHandler.GetMaxMessageSize() {
-		conn.SetReadLimit(s.ServerHandler.GetMaxMessageSize())
-	}
-	if 0 < s.ServerHandler.GetReadTimeout() {
-		conn.SetReadDeadline(time.Now().Add(s.ServerHandler.GetReadTimeout()))
-	}
-	conn.SetPongHandler(func(string) error {
-		conn.SetReadDeadline(time.Now().Add(s.ServerHandler.GetPongTimeout()))
-		return nil
-	})
-
-	var (
-		message []byte
-		err     error
-	)
-
-	for {
-		readMessageChan := make(chan struct{})
-
-		go func() {
-			_, message, err = conn.ReadMessage()
-			close(readMessageChan)
-		}()
-
-		select {
-		case <-s.stopChan:
-			<-readMessageChan
-			return
-		case <-readMessageChan:
-		}
-
-		if nil != err {
-			if server.IsUnexpectedCloseError(err, server.CloseGoingAway, server.CloseAbnormalClosure) {
-				logging.Logger().Debugf(s.serverMessage(fmt.Sprintf("Read error %v", err)))
-			}
-			return
-		}
-
-		readChan <- message
-	}
-}
-
-func handleWrite(s *Server, conn *server.Conn, stopChan <-chan struct{}, doneChan chan<- struct{}, writeChan chan []byte) {
-	defer func() {
-		doneChan <- struct{}{}
-	}()
-
-	ticker := time.NewTicker(s.ServerHandler.GetPingPeriod())
-	defer func() {
-		ticker.Stop()
-	}()
-	for {
-		select {
-		case message, ok := <-writeChan:
-			if 0 < s.ServerHandler.GetWriteTimeout() {
-				conn.SetWriteDeadline(time.Now().Add(s.ServerHandler.GetWriteTimeout()))
-			}
-			if !ok {
-				conn.WriteMessage(server.CloseMessage, []byte{})
-				return
-			}
-
-			w, err := conn.NextWriter(server.TextMessage)
-			if err != nil {
-				return
-			}
-			w.Write(message)
-
-			if err := w.Close(); nil != err {
-				return
-			}
-		case <-ticker.C:
-			conn.SetWriteDeadline(time.Now().Add(s.ServerHandler.GetPingTimeout()))
-			if err := conn.WriteMessage(server.PingMessage, nil); nil != err {
-				return
-			}
-		case <-s.stopChan:
-			return
-		}
-	}
+	s.ServerHandler.(ServerHandler).OnError(s.ctx, ctx, status, reason)
 }
diff --git a/net/client.go b/net/client.go
index 8f8829b..eeec2e2 100644
--- a/net/client.go
+++ b/net/client.go
@@ -12,52 +12,25 @@ import (
 )
 
 type Client struct {
+	server.ClientConnectionHandlers
+	server.ReadWriteHandlers
+
 	Name string
 
-	Network          string
-	Address          string
-	TLSConfig        *tls.Config
-	HandshakeTimeout time.Duration
-	KeepAlive        time.Duration
-	LocalAddress     net.Addr
+	Network      string
+	Address      string
+	LocalAddress net.Addr
 
-	MaxMessageSize int64
-	// Per-connection buffer size for requests' reading.
-	// This also limits the maximum header size.
-	//
-	// Increase this buffer if your clients send multi-KB RequestURIs
-	// and/or multi-KB headers (for example, BIG cookies).
-	//
-	// Default buffer size is used if not set.
-	ReadBufferSize int
-	// Per-connection buffer size for responses' writing.
-	//
-	// Default buffer size is used if not set.
-	WriteBufferSize int
-	// Maximum duration for reading the full request (including body).
-	//
-	// This also limits the maximum duration for idle keep-alive
-	// connections.
-	//
-	// By default request read timeout is unlimited.
-	ReadTimeout time.Duration
+	stopChan chan struct{}
+	stopWg   sync.WaitGroup
 
-	// Maximum duration for writing the full response (including body).
-	//
-	// By default response write timeout is unlimited.
-	WriteTimeout time.Duration
-
-	PongTimeout time.Duration
-	PingTimeout time.Duration
-	PingPeriod  time.Duration
-
-	EnableCompression bool
-
-	stopChan  chan struct{}
-	stopWg    sync.WaitGroup
-	conn      *server.Conn
 	readChan  chan []byte
 	writeChan chan []byte
+
+	disconnectedChan chan struct{}
+	reconnectedChan  chan *server.Conn
+
+	crwch server.ClientRWCHandler
 }
 
 func (c *Client) Connect() (readChan <-chan []byte, writeChan chan<- []byte, err error) {
@@ -81,10 +54,20 @@ func (c *Client) Connect() (readChan <-chan []byte, writeChan chan<- []byte, err
 
 	c.readChan = make(chan []byte, 256)
 	c.writeChan = make(chan []byte, 256)
-
+	c.disconnectedChan = make(chan struct{})
+	c.reconnectedChan = make(chan *server.Conn)
 	c.stopChan = make(chan struct{})
+
+	c.crwch.ReadwriteHandler = c
+	c.crwch.ReadChan = c.readChan
+	c.crwch.WriteChan = c.writeChan
+	c.crwch.ClientStopChan = c.stopChan
+	c.crwch.ClientStopWg = &c.stopWg
+	c.crwch.DisconnectedChan = c.disconnectedChan
+	c.crwch.ReconnectedChan = c.reconnectedChan
+
 	c.stopWg.Add(1)
-	go c.handleConnection(conn)
+	go c.crwch.HandleConnection(conn)
 
 	return c.readChan, c.writeChan, nil
 }
@@ -119,126 +102,6 @@ func (c *Client) connect() (*server.Conn, error) {
 	return conn, nil
 }
 
-func (c *Client) handleConnection(conn *server.Conn) {
-	defer func() {
-		if nil != conn {
-			conn.Close()
-		}
-		logging.Logger().Infof(c.clientMessage("disconnected"))
-		c.stopWg.Done()
-	}()
-
-	logging.Logger().Infof(c.clientMessage("connected"))
-
-	stopChan := make(chan struct{})
-
-	readerDoneChan := make(chan struct{})
-	writerDoneChan := make(chan struct{})
-
-	go handleClientRead(c, conn, stopChan, readerDoneChan)
-	go handleClientWrite(c, conn, stopChan, writerDoneChan)
-
-	select {
-	case <-readerDoneChan:
-		close(stopChan)
-		<-writerDoneChan
-	case <-writerDoneChan:
-		close(stopChan)
-		<-readerDoneChan
-	case <-c.stopChan:
-		close(stopChan)
-		<-readerDoneChan
-		<-writerDoneChan
-	}
-}
-
-func handleClientRead(c *Client, conn *server.Conn, stopChan <-chan struct{}, doneChan chan<- struct{}) {
-	defer func() {
-		doneChan <- struct{}{}
-	}()
-
-	if 0 < c.MaxMessageSize {
-		conn.SetReadLimit(c.MaxMessageSize)
-	}
-	if 0 < c.ReadTimeout {
-		conn.SetReadDeadline(time.Now().Add(c.ReadTimeout))
-	}
-	conn.SetPongHandler(func(string) error {
-		conn.SetReadDeadline(time.Now().Add(c.PongTimeout))
-		return nil
-	})
-
-	var (
-		message []byte
-		err     error
-	)
-
-	for {
-		readMessageChan := make(chan struct{})
-
-		go func() {
-			_, message, err = conn.ReadMessage()
-			close(readMessageChan)
-		}()
-
-		select {
-		case <-stopChan:
-			<-readMessageChan
-			return
-		case <-readMessageChan:
-		}
-
-		if nil != err {
-			if server.IsUnexpectedCloseError(err, server.CloseGoingAway, server.CloseAbnormalClosure) {
-				logging.Logger().Debugf(c.clientMessage(fmt.Sprintf("Read error %v", err)))
-			}
-			return
-		}
-
-		c.readChan <- message
-	}
-}
-
-func handleClientWrite(c *Client, conn *server.Conn, stopChan <-chan struct{}, doneChan chan<- struct{}) {
-	defer func() {
-		doneChan <- struct{}{}
-	}()
-
-	ticker := time.NewTicker(c.PingPeriod)
-	defer func() {
-		ticker.Stop()
-	}()
-	for {
-		select {
-		case message, ok := <-c.writeChan:
-			if 0 < c.WriteTimeout {
-				conn.SetWriteDeadline(time.Now().Add(c.WriteTimeout))
-			}
-			if !ok {
-				conn.WriteMessage(server.CloseMessage, []byte{})
-				return
-			}
-
-			w, err := conn.NextWriter(server.TextMessage)
-			if err != nil {
-				return
-			}
-			w.Write(message)
-
-			if err := w.Close(); nil != err {
-				return
-			}
-		case <-ticker.C:
-			conn.SetWriteDeadline(time.Now().Add(c.PingTimeout))
-			if err := conn.WriteMessage(server.PingMessage, nil); nil != err {
-				return
-			}
-		case <-stopChan:
-			return
-		}
-	}
-}
-
 func (c *Client) Dial() (net.Conn, error) {
 	if err := c.Validate(); nil != err {
 		return nil, err
@@ -279,6 +142,13 @@ func (c *Client) Dial() (net.Conn, error) {
 }
 
 func (c *Client) Validate() error {
+	if err := c.ClientConnectionHandlers.Validate(); nil != err {
+		return err
+	}
+	if err := c.ReadWriteHandlers.Validate(); nil != err {
+		return err
+	}
+
 	if "" == c.Name {
 		c.Name = "Client"
 	}
@@ -291,33 +161,5 @@ func (c *Client) Validate() error {
 		return fmt.Errorf("Client: Address is not valid")
 	}
 
-	if c.HandshakeTimeout <= 0 {
-		c.HandshakeTimeout = server.DefaultHandshakeTimeout
-	}
-	if c.MaxMessageSize <= 0 {
-		c.MaxMessageSize = server.DefaultMaxMessageSize
-	}
-	if c.ReadBufferSize <= 0 {
-		c.ReadBufferSize = server.DefaultReadBufferSize
-	}
-	if c.WriteBufferSize <= 0 {
-		c.WriteBufferSize = server.DefaultWriteBufferSize
-	}
-	if c.ReadTimeout <= 0 {
-		c.ReadTimeout = server.DefaultReadTimeout
-	}
-	if c.WriteTimeout <= 0 {
-		c.WriteTimeout = server.DefaultWriteTimeout
-	}
-	if c.PongTimeout <= 0 {
-		c.PongTimeout = server.DefaultPongTimeout
-	}
-	if c.PingTimeout <= 0 {
-		c.PingTimeout = server.DefaultPingTimeout
-	}
-	if c.PingPeriod <= 0 {
-		c.PingPeriod = server.DefaultPingPeriod
-	}
-
 	return nil
 }
diff --git a/net/server.go b/net/server.go
index 806c99e..04868af 100644
--- a/net/server.go
+++ b/net/server.go
@@ -1,8 +1,10 @@
 package net
 
 import (
+	"context"
 	"fmt"
 	"net"
+	"sync"
 	"sync/atomic"
 	"time"
 
@@ -10,24 +12,19 @@ import (
 	"git.loafle.net/commons/server-go"
 )
 
-type Server interface {
-	server.Server
+type Server struct {
+	ServerHandler ServerHandler
+
+	ctx      server.ServerCtx
+	stopChan chan struct{}
+	stopWg   sync.WaitGroup
+
+	srwch server.ServerRWCHandler
 }
 
-func NewServer(serverHandler ServerHandler) Server {
-	s := &netServer{}
-	s.ServerHandler = serverHandler
-
-	return s
-}
-
-type netServer struct {
-	server.Servers
-}
-
-func (s *netServer) ListenAndServe() error {
-	if s.StopChan != nil {
-		return fmt.Errorf(s.ServerMessage("already running. Stop it before starting it again"))
+func (s *Server) ListenAndServe() error {
+	if s.stopChan != nil {
+		return fmt.Errorf(s.serverMessage("already running. Stop it before starting it again"))
 	}
 
 	var (
@@ -41,25 +38,48 @@ func (s *netServer) ListenAndServe() error {
 		return err
 	}
 
-	s.ServerCtx = s.ServerHandler.ServerCtx()
-	if nil == s.ServerCtx {
-		return fmt.Errorf(s.ServerMessage("ServerCtx is nil"))
+	s.ctx = s.ServerHandler.ServerCtx()
+	if nil == s.ctx {
+		return fmt.Errorf(s.serverMessage("ServerCtx is nil"))
 	}
 
-	if err = s.ServerHandler.Init(s.ServerCtx); nil != err {
+	if err = s.ServerHandler.Init(s.ctx); nil != err {
 		return err
 	}
 
-	if listener, err = s.ServerHandler.Listener(s.ServerCtx); nil != err {
+	if listener, err = s.ServerHandler.Listener(s.ctx); nil != err {
 		return err
 	}
 
-	s.StopChan = make(chan struct{})
-	s.StopWg.Add(1)
+	s.stopChan = make(chan struct{})
+
+	s.srwch.ReadwriteHandler = s.ServerHandler
+	s.srwch.ServerStopChan = s.stopChan
+	s.srwch.ServerStopWg = &s.stopWg
+
+	s.stopWg.Add(1)
 	return s.handleServer(listener)
 }
 
-func (s *netServer) handleServer(listener net.Listener) error {
+func (s *Server) Shutdown(ctx context.Context) error {
+	if s.stopChan == nil {
+		return fmt.Errorf("server must be started before stopping it")
+	}
+	close(s.stopChan)
+	s.stopWg.Wait()
+
+	s.ServerHandler.Destroy(s.ctx)
+
+	s.stopChan = nil
+
+	return nil
+}
+
+func (s *Server) serverMessage(msg string) string {
+	return fmt.Sprintf("Server[%s]: %s", s.ServerHandler.GetName(), msg)
+}
+
+func (s *Server) handleServer(listener net.Listener) error {
 	var (
 		stopping atomic.Value
 		netConn  net.Conn
@@ -71,18 +91,18 @@ func (s *netServer) handleServer(listener net.Listener) error {
 			listener.Close()
 		}
 
-		s.ServerHandler.OnStop(s.ServerCtx)
+		s.ServerHandler.OnStop(s.ctx)
 
-		logging.Logger().Infof(s.ServerMessage("Stopped"))
+		logging.Logger().Infof(s.serverMessage("Stopped"))
 
-		s.StopWg.Done()
+		s.stopWg.Done()
 	}()
 
-	if err = s.ServerHandler.OnStart(s.ServerCtx); nil != err {
+	if err = s.ServerHandler.OnStart(s.ctx); nil != err {
 		return err
 	}
 
-	logging.Logger().Infof(s.ServerMessage("Started"))
+	logging.Logger().Infof(s.serverMessage("Started"))
 
 	for {
 		acceptChan := make(chan struct{})
@@ -90,14 +110,14 @@ func (s *netServer) handleServer(listener net.Listener) error {
 		go func() {
 			if netConn, err = listener.Accept(); err != nil {
 				if nil == stopping.Load() {
-					logging.Logger().Errorf(s.ServerMessage(fmt.Sprintf("%v", err)))
+					logging.Logger().Errorf(s.serverMessage(fmt.Sprintf("%v", err)))
 				}
 			}
 			close(acceptChan)
 		}()
 
 		select {
-		case <-s.StopChan:
+		case <-s.stopChan:
 			stopping.Store(true)
 			listener.Close()
 			<-acceptChan
@@ -108,7 +128,7 @@ func (s *netServer) handleServer(listener net.Listener) error {
 
 		if nil != err {
 			select {
-			case <-s.StopChan:
+			case <-s.stopChan:
 				return nil
 			case <-time.After(time.Second):
 			}
@@ -116,9 +136,9 @@ func (s *netServer) handleServer(listener net.Listener) error {
 		}
 
 		if 0 < s.ServerHandler.GetConcurrency() {
-			sz := s.ConnectionSize()
+			sz := s.srwch.ConnectionSize()
 			if sz >= s.ServerHandler.GetConcurrency() {
-				logging.Logger().Warnf(s.ServerMessage(fmt.Sprintf("max connections size %d, refuse", sz)))
+				logging.Logger().Warnf(s.serverMessage(fmt.Sprintf("max connections size %d, refuse", sz)))
 				netConn.Close()
 				continue
 			}
@@ -126,24 +146,24 @@ func (s *netServer) handleServer(listener net.Listener) error {
 
 		servlet := s.ServerHandler.(ServerHandler).Servlet()
 		if nil == servlet {
-			logging.Logger().Errorf(s.ServerMessage("Servlet is nil"))
+			logging.Logger().Errorf(s.serverMessage("Servlet is nil"))
 			continue
 		}
 
-		servletCtx := servlet.ServletCtx(s.ServerCtx)
+		servletCtx := servlet.ServletCtx(s.ctx)
 		if nil == servletCtx {
-			logging.Logger().Errorf(s.ServerMessage("ServletCtx is nil"))
+			logging.Logger().Errorf(s.serverMessage("ServletCtx is nil"))
 			continue
 		}
 
 		if err := servlet.Handshake(servletCtx, netConn); nil != err {
-			logging.Logger().Infof(s.ServerMessage(fmt.Sprintf("Handshaking of Client[%s] has been failed %v", netConn.RemoteAddr(), err)))
+			logging.Logger().Infof(s.serverMessage(fmt.Sprintf("Handshaking of Client[%s] has been failed %v", netConn.RemoteAddr(), err)))
 			continue
 		}
 
 		conn := server.NewConn(netConn, true, s.ServerHandler.GetReadBufferSize(), s.ServerHandler.GetWriteBufferSize())
 
-		s.StopWg.Add(1)
-		go s.HandleConnection(servlet, servletCtx, conn)
+		s.stopWg.Add(1)
+		go s.srwch.HandleConnection(servlet, servletCtx, conn)
 	}
 }
diff --git a/readwrite-handler.go b/readwrite-handler.go
new file mode 100644
index 0000000..68b94a9
--- /dev/null
+++ b/readwrite-handler.go
@@ -0,0 +1,115 @@
+package server
+
+import (
+	"time"
+)
+
+type ReadWriteHandler interface {
+	GetMaxMessageSize() int64
+	GetReadBufferSize() int
+	GetWriteBufferSize() int
+	GetReadTimeout() time.Duration
+	GetWriteTimeout() time.Duration
+	GetPongTimeout() time.Duration
+	GetPingTimeout() time.Duration
+	GetPingPeriod() time.Duration
+
+	IsEnableCompression() bool
+}
+
+type ReadWriteHandlers struct {
+	ReadWriteHandler
+
+	MaxMessageSize int64
+	// Per-connection buffer size for requests' reading.
+	// This also limits the maximum header size.
+	//
+	// Increase this buffer if your clients send multi-KB RequestURIs
+	// and/or multi-KB headers (for example, BIG cookies).
+	//
+	// Default buffer size is used if not set.
+	ReadBufferSize int
+	// Per-connection buffer size for responses' writing.
+	//
+	// Default buffer size is used if not set.
+	WriteBufferSize int
+	// Maximum duration for reading the full request (including body).
+	//
+	// This also limits the maximum duration for idle keep-alive
+	// connections.
+	//
+	// By default request read timeout is unlimited.
+	ReadTimeout time.Duration
+
+	// Maximum duration for writing the full response (including body).
+	//
+	// By default response write timeout is unlimited.
+	WriteTimeout time.Duration
+
+	PongTimeout time.Duration
+	PingTimeout time.Duration
+	PingPeriod  time.Duration
+
+	EnableCompression bool
+}
+
+func (rwh *ReadWriteHandlers) GetMaxMessageSize() int64 {
+	return rwh.MaxMessageSize
+}
+
+func (rwh *ReadWriteHandlers) GetReadBufferSize() int {
+	return rwh.ReadBufferSize
+}
+
+func (rwh *ReadWriteHandlers) GetWriteBufferSize() int {
+	return rwh.WriteBufferSize
+}
+
+func (rwh *ReadWriteHandlers) GetReadTimeout() time.Duration {
+	return rwh.ReadTimeout
+}
+func (rwh *ReadWriteHandlers) GetWriteTimeout() time.Duration {
+	return rwh.WriteTimeout
+}
+func (rwh *ReadWriteHandlers) GetPongTimeout() time.Duration {
+	return rwh.PongTimeout
+}
+func (rwh *ReadWriteHandlers) GetPingTimeout() time.Duration {
+	return rwh.PingTimeout
+}
+func (rwh *ReadWriteHandlers) GetPingPeriod() time.Duration {
+	return rwh.PingPeriod
+}
+
+func (rwh *ReadWriteHandlers) IsEnableCompression() bool {
+	return rwh.EnableCompression
+}
+
+func (rwh *ReadWriteHandlers) Validate() error {
+	if rwh.MaxMessageSize <= 0 {
+		rwh.MaxMessageSize = DefaultMaxMessageSize
+	}
+	if rwh.ReadBufferSize <= 0 {
+		rwh.ReadBufferSize = DefaultReadBufferSize
+	}
+	if rwh.WriteBufferSize <= 0 {
+		rwh.WriteBufferSize = DefaultWriteBufferSize
+	}
+	if rwh.ReadTimeout <= 0 {
+		rwh.ReadTimeout = DefaultReadTimeout
+	}
+	if rwh.WriteTimeout <= 0 {
+		rwh.WriteTimeout = DefaultWriteTimeout
+	}
+	if rwh.PongTimeout <= 0 {
+		rwh.PongTimeout = DefaultPongTimeout
+	}
+	if rwh.PingTimeout <= 0 {
+		rwh.PingTimeout = DefaultPingTimeout
+	}
+	if rwh.PingPeriod <= 0 {
+		rwh.PingPeriod = (rwh.PingTimeout * 9) / 10
+	}
+
+	return nil
+}
diff --git a/readwrite.go b/readwrite.go
new file mode 100644
index 0000000..0c946b3
--- /dev/null
+++ b/readwrite.go
@@ -0,0 +1,101 @@
+package server
+
+import (
+	"fmt"
+	"io"
+	"time"
+)
+
+func connReadHandler(readWriteHandler ReadWriteHandler, conn *Conn, stopChan <-chan struct{}, doneChan chan<- error, readChan chan<- []byte) {
+	var (
+		message []byte
+		err     error
+	)
+
+	defer func() {
+		doneChan <- err
+	}()
+
+	if 0 < readWriteHandler.GetMaxMessageSize() {
+		conn.SetReadLimit(readWriteHandler.GetMaxMessageSize())
+	}
+	if 0 < readWriteHandler.GetReadTimeout() {
+		conn.SetReadDeadline(time.Now().Add(readWriteHandler.GetReadTimeout()))
+	}
+	conn.SetPongHandler(func(string) error {
+		conn.SetReadDeadline(time.Now().Add(readWriteHandler.GetPongTimeout()))
+		return nil
+	})
+
+	for {
+		readMessageChan := make(chan struct{})
+
+		go func() {
+			_, message, err = conn.ReadMessage()
+			close(readMessageChan)
+		}()
+
+		select {
+		case <-stopChan:
+			<-readMessageChan
+			return
+		case <-readMessageChan:
+		}
+
+		if nil != err {
+			if IsUnexpectedCloseError(err, CloseGoingAway, CloseAbnormalClosure) {
+				err = fmt.Errorf("Read error %v", err)
+			}
+			return
+		}
+
+		readChan <- message
+	}
+}
+
+func connWriteHandler(readWriteHandler ReadWriteHandler, conn *Conn, stopChan <-chan struct{}, doneChan chan<- error, writeChan <-chan []byte) {
+	var (
+		wc      io.WriteCloser
+		message []byte
+		ok      bool
+		err     error
+	)
+
+	defer func() {
+		doneChan <- err
+	}()
+
+	ticker := time.NewTicker(readWriteHandler.GetPingPeriod())
+	defer func() {
+		ticker.Stop()
+	}()
+	for {
+		select {
+		case message, ok = <-writeChan:
+			if 0 < readWriteHandler.GetWriteTimeout() {
+				conn.SetWriteDeadline(time.Now().Add(readWriteHandler.GetWriteTimeout()))
+			}
+			if !ok {
+				conn.WriteMessage(CloseMessage, []byte{})
+				return
+			}
+
+			wc, err = conn.NextWriter(TextMessage)
+			if err != nil {
+				return
+			}
+			wc.Write(message)
+
+			if err = wc.Close(); nil != err {
+				return
+			}
+		case <-ticker.C:
+			conn.SetWriteDeadline(time.Now().Add(readWriteHandler.GetPingTimeout()))
+			if err = conn.WriteMessage(PingMessage, nil); nil != err {
+				return
+			}
+		case <-stopChan:
+			return
+		}
+	}
+}
diff --git a/server-handler.go b/server-handler.go
index 601768b..e83fd4b 100644
--- a/server-handler.go
+++ b/server-handler.go
@@ -1,26 +1,10 @@
 package server
 
-import (
-	"fmt"
-	"net"
-	"time"
-)
-
 type ServerHandler interface {
+	ConnectionHandler
+	ReadWriteHandler
+
 	GetName() string
-	GetConcurrency() int
-	GetHandshakeTimeout() time.Duration
-	GetMaxMessageSize() int64
-	GetReadBufferSize() int
-	GetWriteBufferSize() int
-	GetReadTimeout() time.Duration
-	GetWriteTimeout() time.Duration
-	GetPongTimeout() time.Duration
-	GetPingTimeout() time.Duration
-	GetPingPeriod() time.Duration
-
-	IsEnableCompression() bool
-
 	ServerCtx() ServerCtx
 
 	Init(serverCtx ServerCtx) error
@@ -28,57 +12,18 @@ type ServerHandler interface {
 	OnStop(serverCtx ServerCtx)
 	Destroy(serverCtx ServerCtx)
 
-	Listener(serverCtx ServerCtx) (net.Listener, error)
-
 	Validate() error
 }
 
 type ServerHandlers struct {
 	ServerHandler
+	ConnectionHandlers
+	ReadWriteHandlers
 
 	// Server name for sending in response headers.
 	//
 	// Default server name is used if left blank.
 	Name string
-
-	// The maximum number of concurrent connections the server may serve.
-	//
-	// DefaultConcurrency is used if not set.
-	Concurrency int
-
-	HandshakeTimeout time.Duration
-
-	MaxMessageSize int64
-	// Per-connection buffer size for requests' reading.
-	// This also limits the maximum header size.
-	//
-	// Increase this buffer if your clients send multi-KB RequestURIs
-	// and/or multi-KB headers (for example, BIG cookies).
-	//
-	// Default buffer size is used if not set.
-	ReadBufferSize int
-	// Per-connection buffer size for responses' writing.
-	//
-	// Default buffer size is used if not set.
-	WriteBufferSize int
-	// Maximum duration for reading the full request (including body).
-	//
-	// This also limits the maximum duration for idle keep-alive
-	// connections.
-	//
-	// By default request read timeout is unlimited.
-	ReadTimeout time.Duration
-
-	// Maximum duration for writing the full response (including body).
-	//
-	// By default response write timeout is unlimited.
-	WriteTimeout time.Duration
-
-	PongTimeout time.Duration
-	PingTimeout time.Duration
-	PingPeriod  time.Duration
-
-	EnableCompression bool
 }
 
 func (sh *ServerHandlers) ServerCtx() ServerCtx {
@@ -101,90 +46,21 @@ func (sh *ServerHandlers) Destroy(serverCtx ServerCtx) {
 
 }
 
-func (sh *ServerHandlers) Listener(serverCtx ServerCtx) (net.Listener, error) {
-	return nil, fmt.Errorf("Server: Method[ServerHandler.Listener] is not implemented")
-}
-
 func (sh *ServerHandlers) GetName() string {
 	return sh.Name
 }
 
-func (sh *ServerHandlers) GetConcurrency() int {
-	return sh.Concurrency
-}
-
-func (sh *ServerHandlers) GetHandshakeTimeout() time.Duration {
-	return sh.HandshakeTimeout
-}
-
-func (sh *ServerHandlers) GetMaxMessageSize() int64 {
-	return sh.MaxMessageSize
-}
-
-func (sh *ServerHandlers) GetReadBufferSize() int {
-	return sh.ReadBufferSize
-}
-
-func (sh *ServerHandlers) GetWriteBufferSize() int {
-	return sh.WriteBufferSize
-}
-
-func (sh *ServerHandlers) GetReadTimeout() time.Duration {
-	return sh.ReadTimeout
-}
-func (sh *ServerHandlers) GetWriteTimeout() time.Duration {
-	return sh.WriteTimeout
-}
-func (sh *ServerHandlers) GetPongTimeout() time.Duration {
-	return sh.PongTimeout
-}
-func (sh *ServerHandlers) GetPingTimeout() time.Duration {
-	return sh.PingTimeout
-}
-func (sh *ServerHandlers) GetPingPeriod() time.Duration {
-	return sh.PingPeriod
-}
-
-func (sh *ServerHandlers) IsEnableCompression() bool {
-	return sh.EnableCompression
-}
-
 func (sh *ServerHandlers) Validate() error {
+	if err := sh.ConnectionHandlers.Validate(); nil != err {
+		return err
+	}
+	if err := sh.ReadWriteHandlers.Validate(); nil != err {
+		return err
+	}
+
 	if "" == sh.Name {
 		sh.Name = "Server"
 	}
 
-	if sh.Concurrency <= 0 {
-		sh.Concurrency = DefaultConcurrency
-	}
-
-	if sh.HandshakeTimeout <= 0 {
-		sh.HandshakeTimeout = DefaultHandshakeTimeout
-	}
-	if sh.MaxMessageSize <= 0 {
-		sh.MaxMessageSize = DefaultMaxMessageSize
-	}
-	if sh.ReadBufferSize <= 0 {
-		sh.ReadBufferSize = DefaultReadBufferSize
-	}
-	if sh.WriteBufferSize <= 0 {
-		sh.WriteBufferSize = DefaultWriteBufferSize
-	}
-	if sh.ReadTimeout <= 0 {
-		sh.ReadTimeout = DefaultReadTimeout
-	}
-	if sh.WriteTimeout <= 0 {
-		sh.WriteTimeout = DefaultWriteTimeout
-	}
-	if sh.PongTimeout <= 0 {
-		sh.PongTimeout = DefaultPongTimeout
-	}
-	if sh.PingTimeout <= 0 {
-		sh.PingTimeout = DefaultPingTimeout
-	}
-	if sh.PingPeriod <= 0 {
-		sh.PingPeriod = (sh.PingTimeout * 9) / 10
-	}
-
 	return nil
 }
diff --git a/server-rwc-handler.go b/server-rwc-handler.go
new file mode 100644
index 0000000..9ed7680
--- /dev/null
+++ b/server-rwc-handler.go
@@ -0,0 +1,81 @@
+package server
+
+import (
+	"sync"
+
+	logging "git.loafle.net/commons/logging-go"
+)
+
+type ServerRWCHandler struct {
+	connections sync.Map
+
+	ReadwriteHandler ReadWriteHandler
+	ServerStopChan   <-chan struct{}
+	ServerStopWg     *sync.WaitGroup
+}
+
+func (srwch *ServerRWCHandler) ConnectionSize() int {
+	var sz int
+	srwch.connections.Range(func(k, v interface{}) bool {
+		sz++
+		return true
+	})
+	return sz
+}
+
+func (srwch *ServerRWCHandler) HandleConnection(servlet Servlet, servletCtx ServletCtx, conn *Conn) {
+	addr := conn.RemoteAddr()
+
+	defer func() {
+		if nil != conn {
+			conn.Close()
+		}
+		servlet.OnDisconnect(servletCtx)
+		logging.Logger().Infof("Client[%s] has been disconnected", addr)
+		srwch.ServerStopWg.Done()
+	}()
+
+	logging.Logger().Infof("Client[%s] has been connected", addr)
+
+	srwch.connections.Store(conn, true)
+	defer srwch.connections.Delete(conn)
+
+	servlet.OnConnect(servletCtx, conn)
+	conn.SetCloseHandler(func(code int, text string) error {
+		logging.Logger().Debugf("close")
+		return nil
+	})
+
+	stopChan := make(chan struct{})
+	servletDoneChan := make(chan struct{})
+
+	readChan := make(chan []byte)
+	writeChan := make(chan []byte)
+
+	readerDoneChan := make(chan error)
+	writerDoneChan := make(chan error)
+
+	go servlet.Handle(servletCtx, stopChan, servletDoneChan, readChan, writeChan)
+	go connReadHandler(srwch.ReadwriteHandler, conn, stopChan, readerDoneChan, readChan)
+	go connWriteHandler(srwch.ReadwriteHandler, conn, stopChan, writerDoneChan, writeChan)
+
+	select {
+	case <-readerDoneChan:
+		close(stopChan)
+		<-writerDoneChan
+		<-servletDoneChan
+	case <-writerDoneChan:
+		close(stopChan)
+		<-readerDoneChan
+		<-servletDoneChan
+	case <-servletDoneChan:
+		close(stopChan)
+		<-readerDoneChan
+		<-writerDoneChan
+	case <-srwch.ServerStopChan:
+		close(stopChan)
+		<-readerDoneChan
+		<-writerDoneChan
+		<-servletDoneChan
+	}
+}
diff --git a/server.go b/server.go
deleted file mode 100644
index 13efc35..0000000
--- a/server.go
+++ /dev/null
@@ -1,200 +0,0 @@
-package server
-
-import (
-	"context"
-	"fmt"
-	"sync"
-	"time"
-
-	logging "git.loafle.net/commons/logging-go"
-)
-
-type Server interface {
-	ListenAndServe() error
-	Shutdown(ctx context.Context) error
-	ConnectionSize() int
-
-	HandleConnection(servlet Servlet, servletCtx ServletCtx, conn *Conn)
-	HandleRead(conn *Conn, stopChan <-chan struct{}, doneChan chan<- struct{}, readChan chan []byte)
-	HandleWrite(conn *Conn, stopChan <-chan struct{}, doneChan chan<- struct{}, writeChan chan []byte)
-}
-
-type Servers struct {
-	ServerHandler ServerHandler
-
-	ServerCtx   ServerCtx
-	Connections sync.Map
-	StopChan    chan struct{}
-	StopWg      sync.WaitGroup
-}
-
-func (s *Servers) Shutdown(ctx context.Context) error {
-	if s.StopChan == nil {
-		return fmt.Errorf("server must be started before stopping it")
-	}
-	close(s.StopChan)
-	s.StopWg.Wait()
-
-	s.ServerHandler.Destroy(s.ServerCtx)
-
-	s.StopChan = nil
-
-	return nil
-}
-
-func (s *Servers) ConnectionSize() int {
-	var sz int
-	s.Connections.Range(func(k, v interface{}) bool {
-		sz++
-		return true
-	})
-	return sz
-}
-
-func (s *Servers) ServerMessage(msg string) string {
-	return fmt.Sprintf("Server[%s]: %s", s.ServerHandler.GetName(), msg)
-}
-
-func (s *Servers) HandleConnection(servlet Servlet, servletCtx ServletCtx, conn *Conn) {
-	addr := conn.RemoteAddr()
-
-	defer func() {
-		if nil != conn {
-			conn.Close()
-		}
-		servlet.OnDisconnect(servletCtx)
-		logging.Logger().Infof(s.ServerMessage(fmt.Sprintf("Client[%s] has been disconnected", addr)))
-		s.StopWg.Done()
-	}()
-
-	logging.Logger().Infof(s.ServerMessage(fmt.Sprintf("Client[%s] has been connected", addr)))
-
-	s.Connections.Store(conn, true)
-	defer s.Connections.Delete(conn)
-
-	servlet.OnConnect(servletCtx, conn)
-	conn.SetCloseHandler(func(code int, text string) error {
-		logging.Logger().Debugf("close")
-		return nil
-	})
-
-	stopChan := make(chan struct{})
-	servletDoneChan := make(chan struct{})
-
-	readChan := make(chan []byte)
-	writeChan := make(chan []byte)
-
-	readerDoneChan := make(chan struct{})
-	writerDoneChan := make(chan struct{})
-
-	go servlet.Handle(servletCtx, stopChan, servletDoneChan, readChan, writeChan)
-	go s.HandleRead(conn, stopChan, readerDoneChan, readChan)
-	go s.HandleWrite(conn, stopChan, writerDoneChan, writeChan)
-
-	select {
-	case <-readerDoneChan:
-		close(stopChan)
-		<-writerDoneChan
-		<-servletDoneChan
-	case <-writerDoneChan:
-		close(stopChan)
-		<-readerDoneChan
-		<-servletDoneChan
-	case <-servletDoneChan:
-		close(stopChan)
-		<-readerDoneChan
-		<-writerDoneChan
-	case <-s.StopChan:
-		close(stopChan)
-		<-readerDoneChan
-		<-writerDoneChan
-		<-servletDoneChan
-	}
-}
-
-func (s *Servers) HandleRead(conn *Conn, stopChan <-chan struct{}, doneChan chan<- struct{}, readChan chan []byte) {
-	defer func() {
-		doneChan <- struct{}{}
-	}()
-
-	if 0 < s.ServerHandler.GetMaxMessageSize() {
-		conn.SetReadLimit(s.ServerHandler.GetMaxMessageSize())
-	}
-	if 0 < s.ServerHandler.GetReadTimeout() {
-		conn.SetReadDeadline(time.Now().Add(s.ServerHandler.GetReadTimeout()))
-	}
-	conn.SetPongHandler(func(string) error {
-		conn.SetReadDeadline(time.Now().Add(s.ServerHandler.GetPongTimeout()))
-		return nil
-	})
-
-	var (
-		message []byte
-		err     error
-	)
-
-	for {
-		readMessageChan := make(chan struct{})
-
-		go func() {
-			_, message, err = conn.ReadMessage()
-			close(readMessageChan)
-		}()
-
-		select {
-		case <-s.StopChan:
-			<-readMessageChan
-			return
-		case <-readMessageChan:
-		}
-
-		if nil != err {
-			if IsUnexpectedCloseError(err, CloseGoingAway, CloseAbnormalClosure) {
-				logging.Logger().Debugf(s.ServerMessage(fmt.Sprintf("Read error %v", err)))
-			}
-			return
-		}
-
-		readChan <- message
-	}
-}
-
-func (s *Servers) HandleWrite(conn *Conn, stopChan <-chan struct{}, doneChan chan<- struct{}, writeChan chan []byte) {
-	defer func() {
-		doneChan <- struct{}{}
-	}()
-
-	ticker := time.NewTicker(s.ServerHandler.GetPingPeriod())
-	defer func() {
-		ticker.Stop()
-	}()
-	for {
-		select {
-		case message, ok := <-writeChan:
-			if 0 < s.ServerHandler.GetWriteTimeout() {
-				conn.SetWriteDeadline(time.Now().Add(s.ServerHandler.GetWriteTimeout()))
-			}
-			if !ok {
-				conn.WriteMessage(CloseMessage, []byte{})
-				return
-			}
-
-			w, err := conn.NextWriter(TextMessage)
-			if err != nil {
-				return
-			}
-			w.Write(message)
-
-			if err := w.Close(); nil != err {
-				return
-			}
-		case <-ticker.C:
-			conn.SetWriteDeadline(time.Now().Add(s.ServerHandler.GetPingTimeout()))
-			if err := conn.WriteMessage(PingMessage, nil); nil != err {
-				return
-			}
-		case <-stopChan:
-			return
-		}
-	}
-}