diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..62c8935
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea/
\ No newline at end of file
diff --git a/README.md b/README.md
index 1582e5e..e889315 100644
--- a/README.md
+++ b/README.md
@@ -15,58 +15,75 @@
 * [ ] text/plain
 
 ## Usage
-### Start using it
 
-Download and install it:
+All:
 
-```sh
-$ go get github.com/tpkeeper/gin-dump
+```go
+func main() {
+    router := gin.Default()
+    
+    //use Dump() default will print on stdout
+    router.Use(gindump.Dump())
+    
+    //or use DumpWithOptions() with more options    
+    router.Use(gindump.DumpWithOptions(true, true, false, true, false, func(dumpStr string) {
+	    fmt.Println(dumpStr)
+    }))
+    
+    router.Post("/",myHandler)
+    
+    ...
+    
+    router.Run()
+}
 ```
 
-Import it in your code:
+Group:
 
 ```go
-import "github.com/tpkeeper/gin-dump"
+func main() {
+    router := gin.Default()
+    
+    dumpGroup := router.Group("/group")
+    
+    //use Dump() default will print on stdout
+    dumpGroup.Use(gindump.Dump())
+    
+    //or use DumpWithOptions() with more options    
+    dumpGroup.Use(gindump.DumpWithOptions(true, true, false, true, false, func(dumpStr string) {
+	    fmt.Println(dumpStr)
+    }))
+    
+    dumpGroup.Post("/",myHandler)
+    
+    ...
+    
+    router.Run()
+}
+
 ```
 
-### Canonical example:
+EndPoint:
 
 ```go
-package main
-
-import (
-	"fmt"
-	"time"
-	"github.com/gin-gonic/gin"
-	"github.com/tpkeeper/gin-dump"
-)
-
 func main() {
     router := gin.Default()
     
-    showReq := true
-    showResp := true
-    showBody := true
-    showHeaders := false
-    showCookies := false
+    //use Dump() default will print on stdout
+    router.Post("/",gindump.Dump(),myHandler)
     
-    router.Use(gindump.Dump(nil))   // prints on stdout
-    // or
-	router.Use(gindump.Dump(func(dumpStr string) {
-	    fmt.Println(dumpStr)
-    }))
-    // or
-    router.Use(gindump.DumpWithOptions(showReq, showResp, showBody, showHeaders, showCookies, nil)   // prints on stdout
-    // or
-	router.Use(gindump.DumpWithOptions(showReq, showResp, showBody, showHeaders, showCookies, func(dumpStr string) {
+    //or use DumpWithOptions() with more options    
+    router.Post("/",gindump.DumpWithOptions(true, true, false, true, false, func(dumpStr string) {
 	    fmt.Println(dumpStr)
-    }))
-
-	//...
-	router.Run()
+    }),myHandler)
+    
+    ...
+    
+    router.Run()
 }
 ```
 
+
 ### Output is as follows
 
 ```sh
diff --git a/gindump.go b/gindump.go
index 9fc793b..961440d 100644
--- a/gindump.go
+++ b/gindump.go
@@ -12,13 +12,13 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-func Dump(cb func(dumpStr string)) gin.HandlerFunc {
-	return DumpWithOptions(true, true, true, true, true, cb)
+func Dump() gin.HandlerFunc {
+	return DumpWithOptions(true, true, true, true, true, nil)
 }
 
 func DumpWithOptions(showReq bool, showResp bool, showBody bool, showHeaders bool, showCookies bool, cb func(dumpStr string)) gin.HandlerFunc {
-	headerHiddenFields := make([]string,0)
-	bodyHiddenFields := make([]string,0)
+	headerHiddenFields := make([]string, 0)
+	bodyHiddenFields := make([]string, 0)
 
 	if !showCookies {
 		headerHiddenFields = append(headerHiddenFields, "cookie")
@@ -29,7 +29,7 @@ func DumpWithOptions(showReq bool, showResp bool, showBody bool, showHeaders boo
 
 		if showReq && showHeaders {
 			//dump req header
-			s, err := FormatToJson(ctx.Request.Header, headerHiddenFields)
+			s, err := FormatToBeautifulJson(ctx.Request.Header, headerHiddenFields)
 
 			if err != nil {
 				strB.WriteString(fmt.Sprintf("\nparse req header err \n" + err.Error()))
@@ -80,7 +80,7 @@ func DumpWithOptions(showReq bool, showResp bool, showBody bool, showHeaders boo
 					}
 					val, err := url.ParseQuery(string(bts))
 
-					s, err := FormatToJson(val, bodyHiddenFields)
+					s, err := FormatToBeautifulJson(val, bodyHiddenFields)
 					if err != nil {
 						strB.WriteString(fmt.Sprintf("\nparse req body err \n" + err.Error()))
 						goto DumpRes
@@ -100,7 +100,7 @@ func DumpWithOptions(showReq bool, showResp bool, showBody bool, showHeaders boo
 
 		if showResp && showHeaders {
 			//dump res header
-			sHeader, err := FormatToJson(ctx.Writer.Header(), headerHiddenFields)
+			sHeader, err := FormatToBeautifulJson(ctx.Writer.Header(), headerHiddenFields)
 			if err != nil {
 				strB.WriteString(fmt.Sprintf("\nparse res header err \n" + err.Error()))
 			} else {
@@ -145,7 +145,7 @@ func DumpWithOptions(showReq bool, showResp bool, showBody bool, showHeaders boo
 		if cb != nil {
 			cb(strB.String())
 		} else {
-			fmt.Print(strB.String())
+			fmt.Println(strB.String())
 		}
 	}
 }
diff --git a/gindump_test.go b/gindump_test.go
index f98f5a8..eaf229a 100644
--- a/gindump_test.go
+++ b/gindump_test.go
@@ -7,7 +7,6 @@ import (
 	"io"
 	"net/http"
 	"net/http/httptest"
-	"net/http/httputil"
 	"net/url"
 	"strings"
 	"testing"
@@ -29,9 +28,7 @@ func performRequest(r http.Handler, method, contentType string, path string, bod
 
 func TestMIMEJSON(t *testing.T) {
 	router := gin.New()
-	router.Use(Dump(func(dumpStr string) {
-		fmt.Println(dumpStr)
-	}))
+	router.Use(Dump())
 
 	router.POST("/dump", func(c *gin.Context) {
 		c.JSON(http.StatusOK, gin.H{
@@ -56,12 +53,13 @@ func TestMIMEJSON(t *testing.T) {
 	}
 
 	body := bytes.NewBuffer(b)
+
 	performRequest(router, "POST", gin.MIMEJSON, "/dump", body)
 
 }
 func TestMIMEJSONWithOption(t *testing.T) {
 	router := gin.New()
-	router.Use(DumpWithOptions(true,false,true,true,false,func(dumpStr string) {
+	router.Use(DumpWithOptions(true, false, true, true, false, func(dumpStr string) {
 		fmt.Println(dumpStr)
 	}))
 
@@ -92,18 +90,11 @@ func TestMIMEJSONWithOption(t *testing.T) {
 
 }
 
-
-
 func TestMIMEPOSTFORM(t *testing.T) {
 	router := gin.New()
-	router.Use(Dump(func(dumpStr string) {
-		fmt.Println(dumpStr)
-	}))
+	router.Use(Dump())
 
 	router.POST("/dump", func(c *gin.Context) {
-		bts, err := httputil.DumpRequest(c.Request, true)
-		fmt.Println(string(bts), err)
-
 		c.JSON(http.StatusOK, gin.H{
 			"ok": true,
 			"data": map[string]interface{}{
diff --git a/go.mod b/go.mod
index 94fc707..f2f5a53 100644
--- a/go.mod
+++ b/go.mod
@@ -15,3 +15,5 @@ require (
 	gopkg.in/go-playground/validator.v8 v8.18.2 // indirect
 	gopkg.in/yaml.v2 v2.2.2 // indirect
 )
+
+go 1.13
diff --git a/parse.go b/parse.go
index ce67bbc..8cdce2c 100644
--- a/parse.go
+++ b/parse.go
@@ -13,8 +13,6 @@ var StringMaxLength = 0
 var Newline = "\n"
 var Indent = 4
 
-
-
 func BeautifyJsonBytes(data []byte, hiddenFields []string) ([]byte, error) {
 	var v interface{}
 	if err := json.Unmarshal(data, &v); err != nil {
@@ -26,8 +24,9 @@ func BeautifyJsonBytes(data []byte, hiddenFields []string) ([]byte, error) {
 	return []byte(format(v, 1)), nil
 }
 
-//transfer v to json bytes
-func FormatToJson(v interface{}, hiddenFields []string) ([]byte, error) {
+//transfer v to beautified json bytes
+func FormatToBeautifulJson(v interface{}, hiddenFields []string) ([]byte, error) {
+
 	data, err := json.Marshal(v)
 	if err != nil {
 		return nil, err
@@ -132,7 +131,7 @@ func removeHiddenFields(v interface{}, hiddenFields []string) interface{} {
 
 	// case insensitive key deletion
 	for _, hiddenField := range hiddenFields {
-		for k, _ := range m {
+		for k := range m {
 			if strings.ToLower(k) == strings.ToLower(hiddenField) {
 				delete(m, k)
 			}