diff --git a/log/filehandler.go b/log/filehandler.go
new file mode 100644
index 0000000..bf7aebb
--- /dev/null
+++ b/log/filehandler.go
@@ -0,0 +1,179 @@
+package log
+
+import (
+	"fmt"
+	"os"
+	"time"
+)
+
+type FileHandler struct {
+	fd *os.File
+}
+
+func NewFileHandler(fileName string, flag int) (*FileHandler, error) {
+	f, err := os.OpenFile(fileName, flag, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	h := new(FileHandler)
+
+	h.fd = f
+
+	return h, nil
+}
+
+func (h *FileHandler) Write(b []byte) (n int, err error) {
+	return h.fd.Write(b)
+}
+
+func (h *FileHandler) Close() error {
+	return h.fd.Close()
+}
+
+type RotatingFileHandler struct {
+	fd *os.File
+
+	fileName    string
+	maxBytes    int
+	backupCount int
+}
+
+func NewRotatingFileHandler(fileName string, maxBytes int, backupCount int) (*RotatingFileHandler, error) {
+	h := new(RotatingFileHandler)
+
+	h.fileName = fileName
+	h.maxBytes = maxBytes
+	h.backupCount = backupCount
+
+	var err error
+	h.fd, err = os.OpenFile(fileName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	if err != nil {
+		return nil, err
+	}
+
+	return h, nil
+}
+
+func (h *RotatingFileHandler) Write(p []byte) (n int, err error) {
+	h.doRollover()
+	return h.fd.Write(p)
+}
+
+func (h *RotatingFileHandler) Close() error {
+	if h.fd != nil {
+		return h.fd.Close()
+	}
+	return nil
+}
+
+func (h *RotatingFileHandler) doRollover() {
+	f, err := h.fd.Stat()
+	if err != nil {
+		return
+	}
+
+	if h.maxBytes <= 0 {
+		return
+	} else if f.Size() < int64(h.maxBytes) {
+		return
+	}
+
+	if h.backupCount > 0 {
+		h.fd.Close()
+
+		for i := h.backupCount - 1; i > 0; i-- {
+			sfn := fmt.Sprintf("%s.%d", h.fileName, i)
+			dfn := fmt.Sprintf("%s.%d", h.fileName, i+1)
+
+			os.Rename(sfn, dfn)
+		}
+
+		dfn := fmt.Sprintf("%s.1", h.fileName)
+		os.Rename(h.fileName, dfn)
+
+		h.fd, _ = os.OpenFile(h.fileName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	}
+}
+
+//refer: http://docs.python.org/2/library/logging.handlers.html
+//same like python TimedRotatingFileHandler
+
+type TimeRotatingFileHandler struct {
+	fd *os.File
+
+	baseName   string
+	interval   int64
+	suffix     string
+	rolloverAt int64
+}
+
+const (
+	WhenSecond = iota
+	WhenMinute
+	WhenHour
+	WhenDay
+)
+
+func NewTimeRotatingFileHandler(baseName string, when int8, interval int) (*TimeRotatingFileHandler, error) {
+	h := new(TimeRotatingFileHandler)
+
+	h.baseName = baseName
+
+	switch when {
+	case WhenSecond:
+		h.interval = 1
+		h.suffix = "2006-01-02_15-04-05"
+	case WhenMinute:
+		h.interval = 60
+		h.suffix = "2006-01-02_15-04"
+	case WhenHour:
+		h.interval = 3600
+		h.suffix = "2006-01-02_15"
+	case WhenDay:
+		h.interval = 3600 * 24
+		h.suffix = "2006-01-02"
+	default:
+		return nil, fmt.Errorf("invalid when_rotate: %d", when)
+	}
+
+	h.interval = h.interval * int64(interval)
+
+	var err error
+	h.fd, err = os.OpenFile(h.baseName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	if err != nil {
+		return nil, err
+	}
+
+	fInfo, _ := h.fd.Stat()
+	h.rolloverAt = fInfo.ModTime().Unix() + h.interval
+
+	return h, nil
+}
+
+func (h *TimeRotatingFileHandler) doRollover() {
+	//refer http://hg.python.org/cpython/file/2.7/Lib/logging/handlers.py
+	now := time.Now()
+
+	if h.rolloverAt <= now.Unix() {
+		fName := h.baseName + now.Format(h.suffix)
+		h.fd.Close()
+		e := os.Rename(h.baseName, fName)
+		if e != nil {
+			panic(e)
+		}
+
+		h.fd, _ = os.OpenFile(h.baseName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+
+		h.rolloverAt = time.Now().Unix() + h.interval
+	}
+}
+
+func (h *TimeRotatingFileHandler) Write(b []byte) (n int, err error) {
+	h.doRollover()
+	return h.fd.Write(b)
+}
+
+func (h *TimeRotatingFileHandler) Close() error {
+	return h.fd.Close()
+}
diff --git a/log/handler.go b/log/handler.go
index af4acb4..66257ad 100644
--- a/log/handler.go
+++ b/log/handler.go
@@ -1,10 +1,7 @@
 package log
 
 import (
-	"fmt"
 	"io"
-	"os"
-	"time"
 )
 
 type Handler interface {
@@ -46,175 +43,3 @@ func (h *NullHandler) Write(b []byte) (n int, err error) {
 func (h *NullHandler) Close() {
 
 }
-
-type FileHandler struct {
-	fd *os.File
-}
-
-func NewFileHandler(fileName string, flag int) (*FileHandler, error) {
-	f, err := os.OpenFile(fileName, flag, 0)
-	if err != nil {
-		return nil, err
-	}
-
-	h := new(FileHandler)
-
-	h.fd = f
-
-	return h, nil
-}
-
-func (h *FileHandler) Write(b []byte) (n int, err error) {
-	return h.fd.Write(b)
-}
-
-func (h *FileHandler) Close() error {
-	return h.fd.Close()
-}
-
-type RotatingFileHandler struct {
-	fd *os.File
-
-	fileName    string
-	maxBytes    int
-	backupCount int
-}
-
-func NewRotatingFileHandler(fileName string, maxBytes int, backupCount int) (*RotatingFileHandler, error) {
-	h := new(RotatingFileHandler)
-
-	h.fileName = fileName
-	h.maxBytes = maxBytes
-	h.backupCount = backupCount
-
-	var err error
-	h.fd, err = os.OpenFile(fileName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
-	if err != nil {
-		return nil, err
-	}
-
-	return h, nil
-}
-
-func (h *RotatingFileHandler) Write(p []byte) (n int, err error) {
-	h.doRollover()
-	return h.fd.Write(p)
-}
-
-func (h *RotatingFileHandler) Close() error {
-	if h.fd != nil {
-		return h.fd.Close()
-	}
-	return nil
-}
-
-func (h *RotatingFileHandler) doRollover() {
-	f, err := h.fd.Stat()
-	if err != nil {
-		return
-	}
-
-	if h.maxBytes <= 0 {
-		return
-	} else if f.Size() < int64(h.maxBytes) {
-		return
-	}
-
-	if h.backupCount > 0 {
-		h.fd.Close()
-
-		for i := h.backupCount - 1; i > 0; i-- {
-			sfn := fmt.Sprintf("%s.%d", h.fileName, i)
-			dfn := fmt.Sprintf("%s.%d", h.fileName, i+1)
-
-			os.Rename(sfn, dfn)
-		}
-
-		dfn := fmt.Sprintf("%s.1", h.fileName)
-		os.Rename(h.fileName, dfn)
-
-		h.fd, _ = os.OpenFile(h.fileName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
-	}
-}
-
-//refer: http://docs.python.org/2/library/logging.handlers.html
-//same like python TimedRotatingFileHandler
-
-type TimeRotatingFileHandler struct {
-	fd *os.File
-
-	baseName   string
-	interval   int64
-	suffix     string
-	rolloverAt int64
-}
-
-const (
-	WhenSecond = iota
-	WhenMinute
-	WhenHour
-	WhenDay
-)
-
-func NewTimeRotatingFileHandler(baseName string, when int8, interval int) (*TimeRotatingFileHandler, error) {
-	h := new(TimeRotatingFileHandler)
-
-	h.baseName = baseName
-
-	switch when {
-	case WhenSecond:
-		h.interval = 1
-		h.suffix = "2006-01-02_15-04-05"
-	case WhenMinute:
-		h.interval = 60
-		h.suffix = "2006-01-02_15-04"
-	case WhenHour:
-		h.interval = 3600
-		h.suffix = "2006-01-02_15"
-	case WhenDay:
-		h.interval = 3600 * 24
-		h.suffix = "2006-01-02"
-	default:
-		return nil, fmt.Errorf("invalid when_rotate: %d", when)
-	}
-
-	h.interval = h.interval * int64(interval)
-
-	var err error
-	h.fd, err = os.OpenFile(h.baseName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
-	if err != nil {
-		return nil, err
-	}
-
-	fInfo, _ := h.fd.Stat()
-	h.rolloverAt = fInfo.ModTime().Unix() + h.interval
-
-	return h, nil
-}
-
-func (h *TimeRotatingFileHandler) doRollover() {
-	//refer http://hg.python.org/cpython/file/2.7/Lib/logging/handlers.py
-	now := time.Now()
-
-	if h.rolloverAt <= now.Unix() {
-		fName := h.baseName + now.Format(h.suffix)
-		h.fd.Close()
-		e := os.Rename(h.baseName, fName)
-		if e != nil {
-			panic(e)
-		}
-
-		h.fd, _ = os.OpenFile(h.baseName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
-
-		h.rolloverAt = time.Now().Unix() + h.interval
-	}
-}
-
-func (h *TimeRotatingFileHandler) Write(b []byte) (n int, err error) {
-	h.doRollover()
-	return h.fd.Write(b)
-}
-
-func (h *TimeRotatingFileHandler) Close() error {
-	return h.fd.Close()
-}
diff --git a/log/log.go b/log/log.go
index e1c8440..9e8ed41 100644
--- a/log/log.go
+++ b/log/log.go
@@ -125,7 +125,10 @@ func (l *Logger) Output(callDepth int, level int, format string, v ...interface{
 	s := fmt.Sprintf(format, v...)
 
 	buf = append(buf, s...)
-	buf = append(buf, "\n"...)
+
+	if s[len(s)-1] != '\n' {
+		buf = append(buf, "\n"...)
+	}
 
 	l.msg <- buf
 }
diff --git a/log/loggingd/main.go b/log/loggingd/main.go
new file mode 100644
index 0000000..8c50bb4
--- /dev/null
+++ b/log/loggingd/main.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"flag"
+	"github.com/siddontang/golib/log"
+)
+
+var logFile = flag.String("logfile", "./logd.log", "file to log")
+var net = flag.String("net", "tcp", "server listen protocol, like tcp, udp or unix")
+var addr = flag.String("addr", "127.0.0.1:11183", "server listen address")
+
+func main() {
+	flag.Parse()
+
+	s, err := log.NewServer(*logFile, *net, *addr)
+	if err != nil {
+		panic(err)
+	}
+
+	s.Run()
+}
diff --git a/log/server.go b/log/server.go
new file mode 100644
index 0000000..db3bf6b
--- /dev/null
+++ b/log/server.go
@@ -0,0 +1,95 @@
+package log
+
+import (
+	"bufio"
+	"encoding/binary"
+	"io"
+	"net"
+	"os"
+	"path"
+)
+
+//a log server for handling SocketHandler send log
+
+type Server struct {
+	closed   bool
+	listener net.Listener
+	fd       *os.File
+}
+
+func NewServer(fileName string, protocol string, addr string) (*Server, error) {
+	s := new(Server)
+
+	s.closed = false
+
+	var err error
+
+	dir := path.Dir(fileName)
+	os.Mkdir(dir, 0777)
+
+	s.fd, err = os.OpenFile(fileName, os.O_CREATE|os.O_RDWR|os.O_APPEND, 0666)
+	if err != nil {
+		return nil, err
+	}
+
+	s.listener, err = net.Listen(protocol, addr)
+	if err != nil {
+		return nil, err
+	}
+
+	return s, nil
+}
+
+func (s *Server) Close() error {
+	if s.closed {
+		return nil
+	}
+
+	s.closed = true
+
+	s.fd.Close()
+
+	s.listener.Close()
+	return nil
+}
+
+func (s *Server) Run() {
+	for {
+		conn, err := s.listener.Accept()
+		if err != nil {
+			continue
+		}
+
+		go s.onRead(conn)
+	}
+}
+
+func (s *Server) onRead(c net.Conn) {
+	br := bufio.NewReaderSize(c, 1024)
+
+	var bufLen uint32
+
+	for {
+		if err := binary.Read(br, binary.BigEndian, &bufLen); err != nil {
+			c.Close()
+			return
+		}
+
+		buf := make([]byte, bufLen, bufLen+1)
+
+		if _, err := io.ReadFull(br, buf); err != nil && err != io.ErrUnexpectedEOF {
+			c.Close()
+			return
+		} else {
+			if len(buf) == 0 {
+				continue
+			}
+			if buf[len(buf)-1] != '\n' {
+				buf = append(buf, '\n')
+			}
+
+			s.fd.Write(buf)
+		}
+
+	}
+}
diff --git a/log/socket_test.go b/log/socket_test.go
new file mode 100644
index 0000000..6fd7d35
--- /dev/null
+++ b/log/socket_test.go
@@ -0,0 +1,56 @@
+package log
+
+import (
+	"io"
+	"os"
+	"testing"
+	"time"
+)
+
+func TestSocket(t *testing.T) {
+	fileName := "./test_server.log"
+
+	os.Remove(fileName)
+
+	s, err := NewServer(fileName, "tcp", "127.0.0.1:11183")
+	if err != nil {
+		t.Fatal(err)
+	}
+	go s.Run()
+	defer s.Close()
+
+	var h *SocketHandler
+	h, err = NewSocketHandler("tcp", "127.0.0.1:11183")
+
+	_, err = h.Write([]byte("hello world"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	time.Sleep(1 * time.Second)
+
+	s.Close()
+
+	var f *os.File
+	f, err = os.Open(fileName)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	defer f.Close()
+
+	buf := make([]byte, 64)
+	var n int
+	n, err = f.Read(buf)
+	if err != nil && err != io.EOF {
+		t.Fatal(err)
+	}
+
+	buf = buf[0:n]
+
+	if string(buf) != "hello world\n" {
+		t.Fatal(string(buf))
+	}
+
+	os.Remove(fileName)
+}
diff --git a/log/sockethandler.go b/log/sockethandler.go
new file mode 100644
index 0000000..f19db05
--- /dev/null
+++ b/log/sockethandler.go
@@ -0,0 +1,62 @@
+package log
+
+import (
+	"encoding/binary"
+	"net"
+	"time"
+)
+
+type SocketHandler struct {
+	c        net.Conn
+	protocol string
+	addr     string
+}
+
+func NewSocketHandler(protocol string, addr string) (*SocketHandler, error) {
+	s := new(SocketHandler)
+
+	s.protocol = protocol
+	s.addr = addr
+
+	return s, nil
+}
+
+func (h *SocketHandler) Write(p []byte) (n int, err error) {
+	if err = h.connect(); err != nil {
+		return
+	}
+
+	buf := make([]byte, len(p)+4)
+
+	binary.BigEndian.PutUint32(buf, uint32(len(p)))
+
+	copy(buf[4:], p)
+
+	n, err = h.c.Write(buf)
+	if err != nil {
+		h.c.Close()
+		h.c = nil
+	}
+	return
+}
+
+func (h *SocketHandler) Close() error {
+	if h.c != nil {
+		h.c.Close()
+	}
+	return nil
+}
+
+func (h *SocketHandler) connect() error {
+	if h.c != nil {
+		return nil
+	}
+
+	var err error
+	h.c, err = net.DialTimeout(h.protocol, h.addr, 20*time.Second)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}