diff --git a/flora/config.go b/flora/config.go
index 88f3bc3..1bead1f 100644
--- a/flora/config.go
+++ b/flora/config.go
@@ -2,14 +2,15 @@ package flora
 
 import (
 	"fmt"
-	"github.com/go-ini/ini"
-	ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
 	"log"
+	"math/rand"
 	"net"
 	"os"
 	"strconv"
 	"strings"
-	"math/rand"
+
+	"github.com/go-ini/ini"
+	ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
 )
 
 const (
@@ -38,7 +39,7 @@ type proxyGroup struct {
 	proxyServers []ProxyServer
 }
 
-func LoadConfig(cfgFile string, geoFile string) (*ProxyConfig) {
+func LoadConfig(cfgFile string, geoFile string) *ProxyConfig {
 	proxyConfig := ProxyConfig{}
 	var iniOpts = ini.LoadOptions{
 		AllowBooleanKeys: true,
@@ -148,7 +149,7 @@ func loadProxy(config *ProxyConfig) {
 
 }
 
-func (c *ProxyConfig) GetProxyServer(action string) (ProxyServer) {
+func (c *ProxyConfig) GetProxyServer(action string) ProxyServer {
 	const maxFailCnt = 30
 	var server ProxyServer
 	var ok bool
diff --git a/flora/geoip.go b/flora/geoip.go
index 0d00f80..58cfac9 100644
--- a/flora/geoip.go
+++ b/flora/geoip.go
@@ -1,10 +1,11 @@
 package flora
 
 import (
-	"github.com/oschwald/geoip2-golang"
 	"log"
 	"net"
 	"strings"
+
+	"github.com/oschwald/geoip2-golang"
 )
 
 var geoDB *geoip2.Reader
diff --git a/flora/http.go b/flora/http.go
index e71f2b8..4224de6 100644
--- a/flora/http.go
+++ b/flora/http.go
@@ -1,11 +1,11 @@
 package flora
 
 import (
-	"net"
-	"io"
-	"net/http"
 	"bufio"
 	"bytes"
+	"io"
+	"net"
+	"net/http"
 	"net/http/httputil"
 )
 
@@ -50,8 +50,8 @@ func httpProxyConnect(conn net.Conn, first byte) (addr string, hostType int, raw
 	return
 }
 
-func getRequestType(addr string) int  {
-	host,_,_ := net.SplitHostPort(addr)
+func getRequestType(addr string) int {
+	host, _, _ := net.SplitHostPort(addr)
 	ip := net.ParseIP(host)
 	if nil != ip {
 		return typeIPv4
@@ -59,7 +59,6 @@ func getRequestType(addr string) int  {
 	return typeDm
 }
 
-
 func removeHeaders(req *http.Request) {
 	req.RequestURI = ""
 	req.Header.Del("Accept-Encoding")
diff --git a/flora/network_setup.go b/flora/network_setup.go
index 7b696e5..2468d31 100644
--- a/flora/network_setup.go
+++ b/flora/network_setup.go
@@ -1,11 +1,11 @@
 package flora
 
 import (
-	"os/signal"
-	"syscall"
-	"os"
 	"log"
+	"os"
+	"os/signal"
 	"runtime"
+	"syscall"
 	"time"
 )
 
@@ -21,7 +21,7 @@ func resetProxySettings(proxySettings SystemProxySettings) {
 		select {
 		case <-sigs:
 			log.Print("Flora-kit is shutdown now ...")
-			if nil != proxySettings{
+			if nil != proxySettings {
 				proxySettings.TurnOffGlobProxy()
 			}
 			time.Sleep(time.Duration(2000))
@@ -30,17 +30,17 @@ func resetProxySettings(proxySettings SystemProxySettings) {
 	}
 }
 
-func initProxySettings(bypass []string, addr string)  {
+func initProxySettings(bypass []string, addr string) {
 	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
 	var proxySettings SystemProxySettings
 	if runtime.GOOS == "windows" {
 		w := &windows{addr}
 		proxySettings = w
 	} else if runtime.GOOS == "darwin" {
-		d := &darwin{bypass,addr}
+		d := &darwin{bypass, addr}
 		proxySettings = d
 	}
-	if nil != proxySettings{
+	if nil != proxySettings {
 		proxySettings.TurnOnGlobProxy()
 	}
 	go resetProxySettings(proxySettings)
diff --git a/flora/network_setup_mac.go b/flora/network_setup_mac.go
index b5476c0..0f1f2a1 100644
--- a/flora/network_setup_mac.go
+++ b/flora/network_setup_mac.go
@@ -3,9 +3,9 @@ package flora
 import (
 	"bytes"
 	"log"
+	"net"
 	"os/exec"
 	"strings"
-	"net"
 )
 
 type darwin struct {
diff --git a/flora/network_setup_win.go b/flora/network_setup_win.go
index a1c1828..6a15224 100644
--- a/flora/network_setup_win.go
+++ b/flora/network_setup_win.go
@@ -1,8 +1,8 @@
 package flora
 
 import (
-	"os/exec"
 	"log"
+	"os/exec"
 )
 
 type windows struct {
@@ -10,13 +10,13 @@ type windows struct {
 }
 
 const (
-	cmdRegistry                 = `reg`
-	cmdRegistryAdd              = `add`
-	internetSettingsKey         = `HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings`
-	keyProxyEnable              = `ProxyEnable`
-	keyProxyServer              = `ProxyServer`
-	dataTypeDWord               = `REG_DWORD`
-	dataTypeRegSZ               = `REG_SZ`
+	cmdRegistry         = `reg`
+	cmdRegistryAdd      = `add`
+	internetSettingsKey = `HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings`
+	keyProxyEnable      = `ProxyEnable`
+	keyProxyServer      = `ProxyServer`
+	dataTypeDWord       = `REG_DWORD`
+	dataTypeRegSZ       = `REG_SZ`
 )
 
 func (w *windows) TurnOnGlobProxy() {
@@ -41,7 +41,7 @@ func (w *windows) TurnOffGlobProxy() {
 	if _, err = c.CombinedOutput(); err != nil {
 		log.Printf("disable windows proxy has error %s", err)
 	}
-	if nil == err{
+	if nil == err {
 		log.Print("disable windows proxy settings  are successful ...")
 	}
 }
diff --git a/flora/proxy_direct.go b/flora/proxy_direct.go
index 72edf5a..1b314e0 100644
--- a/flora/proxy_direct.go
+++ b/flora/proxy_direct.go
@@ -6,7 +6,7 @@ type DirectServer struct {
 	proxyType string
 }
 
-func NewDirect() (*DirectServer) {
+func NewDirect() *DirectServer {
 	return &DirectServer{proxyType: ServerTypeDirect}
 }
 
@@ -14,7 +14,7 @@ func (s *DirectServer) FailCount() int {
 	return 0
 }
 
-func (s *DirectServer) ResetFailCount()  {
+func (s *DirectServer) ResetFailCount() {
 
 }
 
@@ -28,10 +28,10 @@ func (s *DirectServer) ProxyType() string {
 
 func (s *DirectServer) DialWithRawAddr(raw []byte, host string) (remote net.Conn, err error) {
 	conn, err := net.Dial("tcp", host)
-	if nil != err{
-		return nil,err
+	if nil != err {
+		return nil, err
 	}
-	if  nil != raw && len(raw) > 0 {
+	if nil != raw && len(raw) > 0 {
 		conn.Write(raw)
 	}
 	return conn, err
diff --git a/flora/proxy_reject.go b/flora/proxy_reject.go
index c58a195..6508c28 100644
--- a/flora/proxy_reject.go
+++ b/flora/proxy_reject.go
@@ -6,7 +6,7 @@ type Reject struct {
 	proxyType string
 }
 
-func NewReject() (*Reject) {
+func NewReject() *Reject {
 	return &Reject{proxyType: ServerTypeReject}
 }
 
diff --git a/flora/proxy_shadowsocks.go b/flora/proxy_shadowsocks.go
index 2bbae94..dd75419 100644
--- a/flora/proxy_shadowsocks.go
+++ b/flora/proxy_shadowsocks.go
@@ -1,8 +1,8 @@
 package flora
 
 import (
-	"net"
 	ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
+	"net"
 	"sync"
 )
 
@@ -14,7 +14,7 @@ type ShadowSocksServer struct {
 	lock      sync.RWMutex
 }
 
-func NewShadowSocks(server string, cipher *ss.Cipher) (*ShadowSocksServer) {
+func NewShadowSocks(server string, cipher *ss.Cipher) *ShadowSocksServer {
 	return &ShadowSocksServer{
 		proxyType: ServerTypeShadowSocks,
 		server:    server,
@@ -29,7 +29,7 @@ func (s *ShadowSocksServer) ResetFailCount() {
 }
 
 func (s *ShadowSocksServer) AddFail() {
-	s.failCount ++
+	s.failCount++
 }
 
 func (s *ShadowSocksServer) FailCount() int {
diff --git a/flora/socks4.go b/flora/socks4.go
index 99b6bba..6d1ed22 100644
--- a/flora/socks4.go
+++ b/flora/socks4.go
@@ -1,10 +1,10 @@
 package flora
 
 import (
-	"io"
-	"net"
 	"encoding/binary"
 	"fmt"
+	"io"
+	"net"
 )
 
 /*
@@ -32,7 +32,7 @@ byte | 0  |  1  | 2 | 3 | 4 | 5 | 6| 7 |
 */
 
 // local socks server  connect
-func socks4Connect(conn net.Conn,first byte ) (addr string, hostType int, err error) {
+func socks4Connect(conn net.Conn, first byte) (addr string, hostType int, err error) {
 	const (
 		idVer     = 0
 		idStatus  = 1
@@ -53,16 +53,16 @@ func socks4Connect(conn net.Conn,first byte ) (addr string, hostType int, err er
 	if n, err = io.ReadAtLeast(conn, buf[1:], id4aFixLen); err != nil {
 		return
 	}
-	n ++
+	n++
 	// command only support connect
 	if buf[idStatus] != cmdConnect {
 		return
 	}
 	// get port
-	port := binary.BigEndian.Uint16(buf[idPort:idPort+idPortLen])
+	port := binary.BigEndian.Uint16(buf[idPort : idPort+idPortLen])
 
 	// get ip
-	ip := net.IP(buf[idIP:idIP+idIPLen])
+	ip := net.IP(buf[idIP : idIP+idIPLen])
 	hostType = typeIPv4
 	var host = ip.String()
 
diff --git a/flora/socks5.go b/flora/socks5.go
index 81dbe0d..b2ffaec 100644
--- a/flora/socks5.go
+++ b/flora/socks5.go
@@ -1,12 +1,12 @@
 package flora
 
 import (
+	"encoding/binary"
+	ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
 	"io"
+	"log"
 	"net"
 	"strconv"
-	ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
-	"encoding/binary"
-	"log"
 )
 
 /*
@@ -46,7 +46,7 @@ byte |0   |  1   | 2  |   3    | 4 | .. | n-2 | n-1 | n |
 */
 
 //local socks server auth
-func handshake(conn net.Conn,first byte ) (err error) {
+func handshake(conn net.Conn, first byte) (err error) {
 	const (
 		idVer     = 0
 		idNmethod = 1
@@ -64,7 +64,7 @@ func handshake(conn net.Conn,first byte ) (err error) {
 	if n, err = io.ReadAtLeast(conn, buf[1:], idNmethod+1); err != nil {
 		return
 	}
-	n ++
+	n++
 	//if buf[idVer] != socksVer5 {
 	//	return errVer
 	//}
@@ -145,13 +145,13 @@ func socks5Connect(conn net.Conn) (host string, hostType int, err error) {
 	//raw := buf[idType:reqLen]
 	switch hostType {
 	case typeIPv4:
-		host = net.IP(buf[idIP0: idIP0+net.IPv4len]).String()
+		host = net.IP(buf[idIP0 : idIP0+net.IPv4len]).String()
 	case typeIPv6:
-		host = net.IP(buf[idIP0: idIP0+net.IPv6len]).String()
+		host = net.IP(buf[idIP0 : idIP0+net.IPv6len]).String()
 	case typeDm:
-		host = string(buf[idDm0: idDm0+buf[idDmLen]])
+		host = string(buf[idDm0 : idDm0+buf[idDmLen]])
 	}
-	port := binary.BigEndian.Uint16(buf[reqLen-2: reqLen])
+	port := binary.BigEndian.Uint16(buf[reqLen-2 : reqLen])
 	host = net.JoinHostPort(host, strconv.Itoa(int(port)))
 	_, err = conn.Write([]byte{0x05, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x08, 0x43})
 	return
diff --git a/geoip_test.go b/geoip_test.go
index bd3d5b8..832e185 100644
--- a/geoip_test.go
+++ b/geoip_test.go
@@ -2,8 +2,8 @@ package main_test
 
 import (
 	"flora-kit/flora"
-	"testing"
 	"os"
+	"testing"
 )
 
 func TestGeoIP(t *testing.T) {