diff --git a/context.go b/context.go
index e3af99e..4aa5e43 100644
--- a/context.go
+++ b/context.go
@@ -15,6 +15,7 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
+	"strings"
 )
 
 type Handler interface {
@@ -57,6 +58,10 @@ func (ctx *Context) Req() *http.Request {
 	return ctx.req
 }
 
+func (ctx *Context) IsAjax() bool {
+	return ctx.Req().Header.Get("X-Requested-With") == "XMLHttpRequest"
+}
+
 func (ctx *Context) SecureCookies(secret string) Cookies {
 	return &secureCookies{
 		(*cookies)(ctx),
@@ -82,6 +87,23 @@ func (ctx *Context) Params() *Params {
 	return &ctx.params
 }
 
+func (ctx *Context) IP() string {
+	proxy := []string{}
+	if ips := ctx.Req().Header.Get("X-Forwarded-For"); ips != "" {
+		proxy = strings.Split(ips, ",")
+	}
+	if len(proxy) > 0 && proxy[0] != "" {
+		return proxy[0]
+	}
+	ip := strings.Split(ctx.Req().RemoteAddr, ":")
+	if len(ip) > 0 {
+		if ip[0] != "[" {
+			return ip[0]
+		}
+	}
+	return "127.0.0.1"
+}
+
 func (ctx *Context) Action() interface{} {
 	ctx.newAction()
 	return ctx.action
diff --git a/cookie.go b/cookie.go
index 3cead40..df8ea38 100644
--- a/cookie.go
+++ b/cookie.go
@@ -10,12 +10,12 @@ import (
 	"crypto/sha1"
 	"encoding/base64"
 	"fmt"
+	"html/template"
 	"io/ioutil"
 	"net/http"
 	"strconv"
 	"strings"
 	"time"
-	"html/template"
 )
 
 func isValidCookieValue(p []byte) bool {
diff --git a/cookie_test.go b/cookie_test.go
index 517d514..1e1c87d 100644
--- a/cookie_test.go
+++ b/cookie_test.go
@@ -1670,4 +1670,4 @@ func TestCookie60(t *testing.T) {
 	expect(t, recorder.Code, http.StatusOK)
 	refute(t, len(buff.String()), 0)
 	expect(t, buff.String(), "1")
-}
\ No newline at end of file
+}
diff --git a/form.go b/form.go
index ef41b17..bd41744 100644
--- a/form.go
+++ b/form.go
@@ -2,9 +2,9 @@ package tango
 
 import (
 	"errors"
+	"html/template"
 	"net/http"
 	"strconv"
-	"html/template"
 )
 
 type Forms http.Request
@@ -226,4 +226,4 @@ func (ctx *Context) FormFloat64(key string, defaults ...float64) float64 {
 
 func (ctx *Context) FormBool(key string, defaults ...bool) bool {
 	return (*Forms)(ctx.req).MustBool(key, defaults...)
-}
\ No newline at end of file
+}
diff --git a/form_test.go b/form_test.go
index 21e12fc..ac93377 100644
--- a/form_test.go
+++ b/form_test.go
@@ -846,4 +846,4 @@ func TestForm30(t *testing.T) {
 	expect(t, recorder.Code, http.StatusOK)
 	refute(t, len(buff.String()), 0)
 	expect(t, buff.String(), "1")
-}
\ No newline at end of file
+}
diff --git a/group.go b/group.go
index 5e8766d..93737c0 100644
--- a/group.go
+++ b/group.go
@@ -106,4 +106,4 @@ func (t *Tango) addGroup(p string, g *Group) {
 
 func (t *Tango) Group(p string, o interface{}) {
 	t.addGroup(p, getGroup(o))
-}
\ No newline at end of file
+}
diff --git a/param.go b/param.go
index 7ded00e..9436240 100644
--- a/param.go
+++ b/param.go
@@ -6,8 +6,8 @@ package tango
 
 import (
 	"errors"
-	"strconv"
 	"html/template"
+	"strconv"
 )
 
 type (
@@ -25,7 +25,7 @@ func (p *Params) Get(key string) string {
 		return ""
 	}
 	if key[0] != ':' && key[0] != '*' {
-		key = ":"+ key
+		key = ":" + key
 	}
 
 	for _, v := range *p {
@@ -41,7 +41,7 @@ func (p *Params) String(key string) (string, error) {
 		return "", errors.New("not exist")
 	}
 	if key[0] != ':' && key[0] != '*' {
-		key = ":"+ key
+		key = ":" + key
 	}
 
 	for _, v := range *p {
@@ -57,7 +57,7 @@ func (p *Params) Strings(key string) ([]string, error) {
 		return nil, errors.New("not exist")
 	}
 	if key[0] != ':' && key[0] != '*' {
-		key = ":"+ key
+		key = ":" + key
 	}
 
 	var s = make([]string, 0)
@@ -77,7 +77,7 @@ func (p *Params) Escape(key string) (string, error) {
 		return "", errors.New("not exist")
 	}
 	if key[0] != ':' && key[0] != '*' {
-		key = ":"+ key
+		key = ":" + key
 	}
 
 	for _, v := range *p {
@@ -133,7 +133,7 @@ func (p *Params) MustString(key string, defaults ...string) string {
 		return ""
 	}
 	if key[0] != ':' && key[0] != '*' {
-		key = ":"+ key
+		key = ":" + key
 	}
 
 	for _, v := range *p {
@@ -152,7 +152,7 @@ func (p *Params) MustStrings(key string, defaults ...[]string) []string {
 		return []string{}
 	}
 	if key[0] != ':' && key[0] != '*' {
-		key = ":"+ key
+		key = ":" + key
 	}
 
 	var s = make([]string, 0)
@@ -175,7 +175,7 @@ func (p *Params) MustEscape(key string, defaults ...string) string {
 		return ""
 	}
 	if key[0] != ':' && key[0] != '*' {
-		key = ":"+ key
+		key = ":" + key
 	}
 
 	for _, v := range *p {
@@ -316,7 +316,7 @@ func (p *Params) Set(key, value string) {
 		return
 	}
 	if key[0] != ':' && key[0] != '*' {
-		key = ":"+ key
+		key = ":" + key
 	}
 
 	for i, v := range *p {
diff --git a/param_test.go b/param_test.go
index 9907bd6..67c0f78 100644
--- a/param_test.go
+++ b/param_test.go
@@ -1005,4 +1005,4 @@ func TestParams36(t *testing.T) {
 	expect(t, recorder.Code, http.StatusOK)
 	refute(t, len(buff.String()), 0)
 	expect(t, buff.String(), "1")
-}
\ No newline at end of file
+}
diff --git a/pool.go b/pool.go
index b9ca380..3d9beaf 100644
--- a/pool.go
+++ b/pool.go
@@ -39,4 +39,4 @@ func (p *pool) New() reflect.Value {
 	p.cur++
 	p.lock.Unlock()
 	return res
-}
\ No newline at end of file
+}
diff --git a/return.go b/return.go
index 0f9f58d..782acde 100644
--- a/return.go
+++ b/return.go
@@ -12,7 +12,7 @@ import (
 )
 
 type StatusResult struct {
-	Code int
+	Code   int
 	Result interface{}
 }
 
diff --git a/return_test.go b/return_test.go
index ffd65e5..11a4d40 100644
--- a/return_test.go
+++ b/return_test.go
@@ -218,16 +218,16 @@ func TestReturnJson3(t *testing.T) {
 }
 
 type JsonReturn3 struct {
-    Json
+	Json
 }
 
 func (JsonReturn3) Get() (int, interface{}) {
-    if true {
-        return 201, map[string]string{
-            "say": "Hello tango!",
-        }
-    }
-    return 500, errors.New("something error")
+	if true {
+		return 201, map[string]string{
+			"say": "Hello tango!",
+		}
+	}
+	return 500, errors.New("something error")
 }
 
 func TestReturnJson4(t *testing.T) {