diff --git a/go.mod b/go.mod
index cf5f11a..ebe31cc 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/dtapps/gorequest
 
 go 1.18
 
-require github.com/nilorg/sdk v0.0.0-20210429091026-95b6cdc95c84
+require github.com/dtapps/gostring v1.0.1
diff --git a/go.sum b/go.sum
index 7a10f97..28980bf 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-github.com/nilorg/sdk v0.0.0-20210429091026-95b6cdc95c84 h1:Nxk1uViXfb9MHgtHBlQFWzlQCsJbDQuotfTsAFcFP3o=
-github.com/nilorg/sdk v0.0.0-20210429091026-95b6cdc95c84/go.mod h1:X1swpPdqguAZaBDoEPyEWHSsJii0YQ1o+3piMv6W3JU=
+github.com/dtapps/gostring v1.0.1 h1:J04kndQ08LOqb+H41s8PbMEgNtpheV9iTTl7DSPIZVk=
+github.com/dtapps/gostring v1.0.1/go.mod h1:BYYnZHrmwpFXkLpd9rQyV5YcChovVreacfcjyMKEwoU=
diff --git a/http.go b/http.go
index ba83779..38f1308 100644
--- a/http.go
+++ b/http.go
@@ -22,13 +22,15 @@ type Response struct {
 	ResponseContentLength int64       //【返回】大小
 }
 
-type app struct {
+type App struct {
+	Url             string   // 全局请求地址，没有设置url才会使用
 	httpUrl         string   // 请求地址
 	httpMethod      string   // 请求方法
 	httpHeader      Headers  // 请求头
 	httpParams      Params   // 请求参数
 	httpParamsMode  string   // 请求参数方式
 	responseContent Response // 返回内容
+	Error           error    // 错误
 }
 
 var (
@@ -37,25 +39,25 @@ var (
 )
 
 // NewHttp 实例化
-func NewHttp() *app {
-	return &app{
+func NewHttp() *App {
+	return &App{
 		httpHeader: NewHeaders(),
 		httpParams: NewParams(),
 	}
 }
 
 // SetUrl 设置请求地址
-func (app *app) SetUrl(url string) {
+func (app *App) SetUrl(url string) {
 	app.httpUrl = url
 }
 
 // SetMethod 设置请求方式地址
-func (app *app) SetMethod(method string) {
+func (app *App) SetMethod(method string) {
 	app.httpMethod = method
 }
 
 // SetHeader 设置请求头
-func (app *app) SetHeader(key, value string) {
+func (app *App) SetHeader(key, value string) {
 	if key == "" {
 		panic("url is empty")
 	}
@@ -63,19 +65,19 @@ func (app *app) SetHeader(key, value string) {
 }
 
 // SetHeaders 批量设置请求头
-func (app *app) SetHeaders(headers Headers) {
+func (app *App) SetHeaders(headers Headers) {
 	for key, value := range headers {
 		app.httpHeader.Set(key, value)
 	}
 }
 
 // SetAuthToken 设置身份验证令牌
-func (app *app) SetAuthToken(token string) {
+func (app *App) SetAuthToken(token string) {
 	app.httpHeader.Set("Authorization", fmt.Sprintf("Bearer %s", token))
 }
 
 // SetUserAgent 设置用户代理，空字符串就随机设置
-func (app *app) SetUserAgent(ua string) {
+func (app *App) SetUserAgent(ua string) {
 	if ua == "" {
 		ua = GetRandomUserAgent()
 	}
@@ -83,50 +85,50 @@ func (app *app) SetUserAgent(ua string) {
 }
 
 // SetContentTypeJson 设置JSON格式
-func (app *app) SetContentTypeJson() {
+func (app *App) SetContentTypeJson() {
 	app.httpParamsMode = httpParamsModeJson
 	app.httpHeader.Set("Content-Type", "application/json")
 }
 
 // SetContentTypeForm 设置FORM格式
-func (app *app) SetContentTypeForm() {
+func (app *App) SetContentTypeForm() {
 	app.httpParamsMode = httpParamsModeForm
 	app.httpHeader.Set("Content-Type", "application/x-www-form-urlencoded")
 }
 
 // SetParam 设置请求参数
-func (app *app) SetParam(key string, value interface{}) {
+func (app *App) SetParam(key string, value interface{}) {
 	app.httpParams.Set(key, value)
 }
 
 // SetParams 批量设置请求参数
-func (app *app) SetParams(params Params) {
+func (app *App) SetParams(params Params) {
 	for key, value := range params {
 		app.httpParams.Set(key, value)
 	}
 }
 
 // Get 发起GET请求
-func (app *app) Get() (httpResponse Response, err error) {
+func (app *App) Get() (httpResponse Response, err error) {
 	// 设置请求方法
 	app.httpMethod = http.MethodGet
 	return request(app)
 }
 
 // Post 发起POST请求
-func (app *app) Post() (httpResponse Response, err error) {
+func (app *App) Post() (httpResponse Response, err error) {
 	// 设置请求方法
 	app.httpMethod = http.MethodPost
 	return request(app)
 }
 
 // Request 发起请求
-func (app *app) Request() (httpResponse Response, err error) {
+func (app *App) Request() (httpResponse Response, err error) {
 	return request(app)
 }
 
 // 请求
-func request(app *app) (httpResponse Response, err error) {
+func request(app *App) (httpResponse Response, err error) {
 
 	// 创建 http 客户端
 	client := &http.Client{}
diff --git a/ip.go b/ip.go
index cafdd9c..34dcda3 100644
--- a/ip.go
+++ b/ip.go
@@ -6,7 +6,7 @@ import (
 	"strings"
 )
 
-const Version = "1.0.1"
+const Version = "1.0.2"
 
 // ClientIp 尽最大努力实现获取客户端 IP 的算法。
 // 解析 X-Real-IP 和 X-Forwarded-For 以便于反向代理（nginx 或 haproxy）可以正常工作。
diff --git a/params.go b/params.go
index 85c2752..e6a40fd 100644
--- a/params.go
+++ b/params.go
@@ -2,7 +2,7 @@ package gorequest
 
 import (
 	"encoding/json"
-	"github.com/nilorg/sdk/convert"
+	"github.com/dtapps/gostring"
 	"log"
 )
 
@@ -30,7 +30,7 @@ func GetParamsString(src interface{}) string {
 	case int, int8, int32, int64:
 	case uint8, uint16, uint32, uint64:
 	case float32, float64:
-		return convert.ToString(src)
+		return gostring.ToString(src)
 	}
 	data, err := json.Marshal(src)
 	if err != nil {
diff --git a/vendor/github.com/dtapps/gostring/.gitignore b/vendor/github.com/dtapps/gostring/.gitignore
new file mode 100644
index 0000000..34509e3
--- /dev/null
+++ b/vendor/github.com/dtapps/gostring/.gitignore
@@ -0,0 +1,8 @@
+.env
+.git
+.svn
+.idea
+.vscode
+*.log
+gitmod.sh
+*_test.go
\ No newline at end of file
diff --git a/vendor/github.com/nilorg/sdk/LICENSE b/vendor/github.com/dtapps/gostring/LICENSE
similarity index 95%
rename from vendor/github.com/nilorg/sdk/LICENSE
rename to vendor/github.com/dtapps/gostring/LICENSE
index a122b0f..a0d0e5b 100644
--- a/vendor/github.com/nilorg/sdk/LICENSE
+++ b/vendor/github.com/dtapps/gostring/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 Nil Org
+Copyright (c) 2018 茂名聚合科技有限公司
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/vendor/github.com/dtapps/gostring/README.md b/vendor/github.com/dtapps/gostring/README.md
new file mode 100644
index 0000000..d8b7032
--- /dev/null
+++ b/vendor/github.com/dtapps/gostring/README.md
@@ -0,0 +1,25 @@
+<h1>
+<a href="https://www.dtapp.net/">Golang String</a>
+</h1>
+
+📦 Golang 字符串组件
+
+[comment]: <> (go)
+[![godoc](https://pkg.go.dev/badge/github.com/dtapps/gostring?status.svg)](https://pkg.go.dev/github.com/dtapps/gostring)
+[![goproxy.cn](https://goproxy.cn/stats/github.com/dtapps/gostring/badges/download-count.svg)](https://goproxy.cn/stats/github.com/dtapps/gostring)
+[![goreportcard.com](https://goreportcard.com/badge/github.com/dtapps/gostring)](https://goreportcard.com/report/github.com/dtapps/gostring)
+[![deps.dev](https://img.shields.io/badge/deps-go-red.svg)](https://deps.dev/go/github.com%2Fdtapps%2Fgostring)
+
+#### 安装使用
+
+```go
+go get -v -u github.com/dtapps/gostring
+```
+
+#### 导入
+
+```go
+import (
+    "github.com/dtapps/gostring"
+)
+```
\ No newline at end of file
diff --git a/vendor/github.com/dtapps/gostring/gostring.go b/vendor/github.com/dtapps/gostring/gostring.go
new file mode 100644
index 0000000..587dea1
--- /dev/null
+++ b/vendor/github.com/dtapps/gostring/gostring.go
@@ -0,0 +1,151 @@
+package gostring
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+)
+
+const Version = "1.0.1"
+
+// ToString 转换成string
+func ToString(value interface{}) string {
+	if value == nil {
+		return ""
+	}
+	return fmt.Sprint(value)
+}
+
+// ToFloat64 string到float64
+func ToFloat64(s string) float64 {
+	i, _ := strconv.ParseFloat(s, 64)
+	return i
+}
+
+// ToInt string到int
+func ToInt(s string) int {
+	i, _ := strconv.Atoi(s)
+	return i
+}
+
+// ToInt64 string到int64
+func ToInt64(s string) int64 {
+	i, err := strconv.ParseInt(s, 10, 64)
+	if err == nil {
+		return i
+	}
+	return int64(ToFloat64(s))
+}
+
+// ToUint string到uint64
+func ToUint(s string) uint {
+	i, err := strconv.ParseUint(s, 10, 64)
+	if err == nil {
+		return uint(i)
+	}
+	return 0
+}
+
+// ToUint64 string到uint64
+func ToUint64(s string) uint64 {
+	i, err := strconv.ParseUint(s, 10, 64)
+	if err == nil {
+		return i
+	}
+	return 0
+}
+
+// Replace 字符串替换
+func Replace(str, old, new string) string {
+	return strings.Replace(str, old, new, -1)
+}
+
+func HmacSha256Hex(key, strToSign string) string {
+	hasHer := hmac.New(sha256.New, []byte(key))
+	hasHer.Write([]byte(strToSign))
+	return hex.EncodeToString(hasHer.Sum(nil))
+}
+
+// Space 去除空格
+func Space(str string) string {
+	return strings.Replace(str, " ", "", -1)
+}
+
+// LineBreak 去除换行符
+func LineBreak(str string) string {
+	return strings.Replace(str, "\n", "", -1)
+}
+
+// SpaceAndLineBreak 去除空格和去除换行符
+func SpaceAndLineBreak(str string) string {
+	return LineBreak(Space(str))
+}
+
+// TrimLastChar 删除字符串中的最后一个
+func TrimLastChar(s string) string {
+	r, size := utf8.DecodeLastRuneInString(s)
+	if r == utf8.RuneError && (size == 0 || size == 1) {
+		size = 0
+	}
+	return s[:len(s)-size]
+}
+
+// Split 字符串分隔
+func Split(s string, sep string) []string {
+	return strings.Split(s, sep)
+}
+
+// Contains 判断字符串是否包含某个字符
+func Contains(s, substr string) bool {
+	return strings.Contains(s, substr)
+}
+
+func NumericalToString(value interface{}) (string, bool) {
+	var val string
+
+	switch value.(type) {
+	default:
+		return "0", false
+	case int:
+		intVal, _ := value.(int)
+		val = strconv.FormatInt(int64(intVal), 10)
+	case int8:
+		intVal, _ := value.(int8)
+		val = strconv.FormatInt(int64(intVal), 10)
+	case int16:
+		intVal, _ := value.(int16)
+		val = strconv.FormatInt(int64(intVal), 10)
+	case int32:
+		intVal, _ := value.(int32)
+		val = strconv.FormatInt(int64(intVal), 10)
+	case int64:
+		intVal, _ := value.(int64)
+		val = strconv.FormatInt(int64(intVal), 10)
+	case uint:
+		intVal, _ := value.(uint)
+		val = strconv.FormatUint(uint64(intVal), 10)
+	case uint8:
+		intVal, _ := value.(uint8)
+		val = strconv.FormatUint(uint64(intVal), 10)
+	case uint16:
+		intVal, _ := value.(uint16)
+		val = strconv.FormatUint(uint64(intVal), 10)
+	case uint32:
+		intVal, _ := value.(uint32)
+		val = strconv.FormatUint(uint64(intVal), 10)
+	case uint64:
+		intVal, _ := value.(uint64)
+		val = strconv.FormatUint(intVal, 10)
+	case float32:
+		floatVal, _ := value.(float32)
+		val = strconv.FormatFloat(float64(floatVal), 'f', -1, 32)
+	case float64:
+		floatVal, _ := value.(float64)
+		val = strconv.FormatFloat(floatVal, 'f', -1, 64)
+	}
+	return val, true
+}
diff --git a/vendor/github.com/nilorg/sdk/convert/convert.go b/vendor/github.com/nilorg/sdk/convert/convert.go
deleted file mode 100644
index 2ce0fa2..0000000
--- a/vendor/github.com/nilorg/sdk/convert/convert.go
+++ /dev/null
@@ -1,112 +0,0 @@
-package convert
-
-import (
-	"bytes"
-	"encoding/binary"
-	"fmt"
-	"strconv"
-)
-
-// ToString 转换成string
-func ToString(value interface{}) string {
-	if value == nil {
-		return ""
-	}
-	return fmt.Sprint(value)
-}
-
-// ToBool 转换成Bool
-func ToBool(i interface{}) bool {
-	switch b := i.(type) {
-	case bool:
-		return b
-	case nil:
-		return false
-	case int:
-		if i.(int) != 0 {
-			return true
-		}
-		return false
-	case string:
-		v, err := strconv.ParseBool(ToString(i))
-		if err != nil {
-			return false
-		}
-		return v
-	default:
-		return false
-	}
-}
-
-// ToInt 转换成int
-func ToInt(value interface{}) int {
-	return int(ToInt64(value))
-}
-
-// ToInt32 转换成int32
-func ToInt32(value interface{}) int32 {
-	return int32(ToInt64(value))
-}
-
-// ToInt64 转换成int64
-func ToInt64(value interface{}) int64 {
-	num, err := strconv.ParseInt(ToString(value), 10, 64)
-	if err != nil {
-		return 0
-	}
-	return num
-}
-
-// ToUint 转换成uint
-func ToUint(value interface{}) uint {
-	return uint(ToUint64(value))
-}
-
-// ToUint32 转换成uint32
-func ToUint32(value interface{}) uint32 {
-	return uint32(ToUint64(value))
-}
-
-// ToUint64 转换成uint64
-func ToUint64(value interface{}) uint64 {
-	num, err := strconv.ParseUint(ToString(value), 10, 64)
-	if err != nil {
-		return 0
-	}
-	return num
-}
-
-// ToFloat32 转换成float32
-func ToFloat32(value interface{}) float32 {
-	return float32(ToFloat64(value))
-}
-
-// ToFloat64 转换成float64
-func ToFloat64(value interface{}) float64 {
-	num, err := strconv.ParseFloat(ToString(value), 64)
-	if err != nil {
-		return 0
-	}
-	return num
-}
-
-// BytesToInt32 字节转Int32
-func BytesToInt32(data []byte) int32 {
-	var num int32
-	buffer := bytes.NewBuffer(data)
-	binary.Read(buffer, binary.BigEndian, &num)
-	return num
-}
-
-// BytesToInt 字节转Int
-func BytesToInt(data []byte) int {
-	return int(BytesToInt32(data))
-}
-
-// BytesToInt64 字节转Int64
-func BytesToInt64(data []byte) int64 {
-	var num int64
-	buffer := bytes.NewBuffer(data)
-	binary.Read(buffer, binary.BigEndian, &num)
-	return num
-}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 15cb268..c49e46f 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,3 +1,3 @@
-# github.com/nilorg/sdk v0.0.0-20210429091026-95b6cdc95c84
-## explicit; go 1.12
-github.com/nilorg/sdk/convert
+# github.com/dtapps/gostring v1.0.1
+## explicit
+github.com/dtapps/gostring