diff --git a/bot.go b/bot.go
index 7da9626..e599dcd 100644
--- a/bot.go
+++ b/bot.go
@@ -1,40 +1,40 @@
 package openwechat
 
 import (
-	"context"
-	"errors"
-	"log"
-	"net/url"
+    "context"
+    "errors"
+    "log"
+    "net/url"
 )
 
 type Bot struct {
-	ScanCallBack           func(body []byte)  // 扫码回调,可获取扫码用户的头像
-	LoginCallBack          func(body []byte)  // 登陆回调
-	LogoutCallBack         func(bot *Bot)     // 退出回调
-	UUIDCallback           func(uuid string)  // 获取UUID的回调函数
-	MessageHandler         func(msg *Message) // 获取消息成功的handle
-	GetMessageErrorHandler func(err error)    // 获取消息发生错误的handle
-	isHot                  bool
-	err                    error
-	context                context.Context
-	cancel                 context.CancelFunc
-	Caller                 *Caller
-	self                   *Self
-	storage                *Storage
-	hotReloadStorage       HotReloadStorage
+    ScanCallBack           func(body []byte)  // 扫码回调,可获取扫码用户的头像
+    LoginCallBack          func(body []byte)  // 登陆回调
+    LogoutCallBack         func(bot *Bot)     // 退出回调
+    UUIDCallback           func(uuid string)  // 获取UUID的回调函数
+    MessageHandler         func(msg *Message) // 获取消息成功的handle
+    GetMessageErrorHandler func(err error)    // 获取消息发生错误的handle
+    isHot                  bool
+    err                    error
+    context                context.Context
+    cancel                 context.CancelFunc
+    Caller                 *Caller
+    self                   *Self
+    storage                *Storage
+    hotReloadStorage       HotReloadStorage
 }
 
 // 判断当前用户是否正常在线
 func (b *Bot) Alive() bool {
-	if b.self == nil {
-		return false
-	}
-	select {
-	case <-b.context.Done():
-		return false
-	default:
-		return true
-	}
+    if b.self == nil {
+        return false
+    }
+    select {
+    case <-b.context.Done():
+        return false
+    default:
+        return true
+    }
 }
 
 // 获取当前的用户
@@ -44,10 +44,10 @@ func (b *Bot) Alive() bool {
 //		}
 //		fmt.Println(self.NickName)
 func (b *Bot) GetCurrentUser() (*Self, error) {
-	if b.self == nil {
-		return nil, errors.New("user not login")
-	}
-	return b.self, nil
+    if b.self == nil {
+        return nil, errors.New("user not login")
+    }
+    return b.self, nil
 }
 
 // 热登录,可实现重复登录,
@@ -56,270 +56,278 @@ func (b *Bot) GetCurrentUser() (*Self, error) {
 //		err := bot.HotLogin(storage, true)
 //		fmt.Println(err)
 func (b *Bot) HotLogin(storage HotReloadStorage, retry ...bool) error {
-	b.isHot = true
-	b.hotReloadStorage = storage
+    b.isHot = true
+    b.hotReloadStorage = storage
 
-	var err error
+    var err error
 
-	// 如果load出错了,就执行正常登陆逻辑
-	// 第一次没有数据load都会出错的
-	if err = storage.Load(); err != nil {
-		return b.Login()
-	}
+    // 如果load出错了,就执行正常登陆逻辑
+    // 第一次没有数据load都会出错的
+    if err = storage.Load(); err != nil {
+        return b.Login()
+    }
 
-	if err = b.hotLoginInit(); err != nil {
-		return err
-	}
+    if err = b.hotLoginInit(); err != nil {
+        return err
+    }
 
-	// 如果webInit出错,则说明可能身份信息已经失效
-	// 如果retry为True的话,则进行正常登陆
-	if err = b.webInit(); err != nil {
-		if len(retry) > 0 {
-			if retry[0] {
-				return b.Login()
-			}
-		}
-	}
-	return err
+    // 如果webInit出错,则说明可能身份信息已经失效
+    // 如果retry为True的话,则进行正常登陆
+    if err = b.webInit(); err != nil {
+        if len(retry) > 0 {
+            if retry[0] {
+                return b.Login()
+            }
+        }
+    }
+    return err
 }
 
 // 热登陆初始化
 func (b *Bot) hotLoginInit() error {
-	cookies := b.hotReloadStorage.GetCookie()
-	for u, ck := range cookies {
-		path, err := url.Parse(u)
-		if err != nil {
-			return err
-		}
-		b.Caller.Client.Jar.SetCookies(path, ck)
-	}
-	b.storage.LoginInfo = b.hotReloadStorage.GetLoginInfo()
-	b.storage.Request = b.hotReloadStorage.GetBaseRequest()
-	return nil
+    item := b.hotReloadStorage.GetHotReloadStorageItem()
+    cookies := item.Cookies
+    for u, ck := range cookies {
+        path, err := url.Parse(u)
+        if err != nil {
+            return err
+        }
+        b.Caller.Client.Jar.SetCookies(path, ck)
+    }
+    b.storage.LoginInfo = item.LoginInfo
+    b.storage.Request = item.BaseRequest
+    b.Caller.Client.domain = item.WechatDomain
+    return nil
 }
 
 // 用户登录
 // 该方法会一直阻塞，直到用户扫码登录，或者二维码过期
 func (b *Bot) Login() error {
-	uuid, err := b.Caller.GetLoginUUID()
-	if err != nil {
-		return err
-	}
-	// 二维码获取回调
-	if b.UUIDCallback != nil {
-		b.UUIDCallback(uuid)
-	}
-	for {
-		// 长轮询检查是否扫码登录
-		resp, err := b.Caller.CheckLogin(uuid)
-		if err != nil {
-			return err
-		}
-		switch resp.Code {
-		case statusSuccess:
-			// 判断是否有登录回调，如果有执行它
-			if b.LoginCallBack != nil {
-				b.LoginCallBack(resp.Raw)
-			}
-			return b.handleLogin(resp.Raw)
-		case statusScanned:
-			// 执行扫码回调
-			if b.ScanCallBack != nil {
-				b.ScanCallBack(resp.Raw)
-			}
-		case statusTimeout:
-			return errors.New("login time out")
-		case statusWait:
-			continue
-		}
-	}
+    uuid, err := b.Caller.GetLoginUUID()
+    if err != nil {
+        return err
+    }
+    // 二维码获取回调
+    if b.UUIDCallback != nil {
+        b.UUIDCallback(uuid)
+    }
+    for {
+        // 长轮询检查是否扫码登录
+        resp, err := b.Caller.CheckLogin(uuid)
+        if err != nil {
+            return err
+        }
+        switch resp.Code {
+        case statusSuccess:
+            // 判断是否有登录回调，如果有执行它
+            if b.LoginCallBack != nil {
+                b.LoginCallBack(resp.Raw)
+            }
+            return b.handleLogin(resp.Raw)
+        case statusScanned:
+            // 执行扫码回调
+            if b.ScanCallBack != nil {
+                b.ScanCallBack(resp.Raw)
+            }
+        case statusTimeout:
+            return errors.New("login time out")
+        case statusWait:
+            continue
+        }
+    }
 }
 
 // 用户退出
 func (b *Bot) Logout() error {
-	if b.Alive() {
-		if b.LogoutCallBack != nil {
-			b.LogoutCallBack(b)
-		}
-		info := b.storage.LoginInfo
-		if err := b.Caller.Logout(info); err != nil {
-			return err
-		}
-		b.stopAsyncCALL(errors.New("logout"))
-		return nil
-	}
-	return errors.New("user not login")
+    if b.Alive() {
+        if b.LogoutCallBack != nil {
+            b.LogoutCallBack(b)
+        }
+        info := b.storage.LoginInfo
+        if err := b.Caller.Logout(info); err != nil {
+            return err
+        }
+        b.stopAsyncCALL(errors.New("logout"))
+        return nil
+    }
+    return errors.New("user not login")
 }
 
 // 登录逻辑
 func (b *Bot) handleLogin(data []byte) error {
-	// 获取登录的一些基本的信息
-	info, err := b.Caller.GetLoginInfo(data)
-	if err != nil {
-		return err
-	}
-	// 将LoginInfo存到storage里面
-	b.storage.LoginInfo = info
+    // 获取登录的一些基本的信息
+    info, err := b.Caller.GetLoginInfo(data)
+    if err != nil {
+        return err
+    }
+    // 将LoginInfo存到storage里面
+    b.storage.LoginInfo = info
 
-	// 构建BaseRequest
-	request := &BaseRequest{
-		Uin:      info.WxUin,
-		Sid:      info.WxSid,
-		Skey:     info.SKey,
-		DeviceID: GetRandomDeviceId(),
-	}
+    // 构建BaseRequest
+    request := &BaseRequest{
+        Uin:      info.WxUin,
+        Sid:      info.WxSid,
+        Skey:     info.SKey,
+        DeviceID: GetRandomDeviceId(),
+    }
 
-	// 将BaseRequest存到storage里面方便后续调用
-	b.storage.Request = request
+    // 将BaseRequest存到storage里面方便后续调用
+    b.storage.Request = request
 
-	// 如果是热登陆,则将当前的重要信息写入hotReloadStorage
-	if b.isHot {
-		cookies := b.Caller.Client.GetCookieMap()
-		if err := b.hotReloadStorage.Dump(cookies, request, info); err != nil {
-			return err
-		}
-	}
+    // 如果是热登陆,则将当前的重要信息写入hotReloadStorage
+    if b.isHot {
+        cookies := b.Caller.Client.GetCookieMap()
+        item := HotReloadStorageItem{
+            BaseRequest:  request,
+            Cookies:      cookies,
+            LoginInfo:    info,
+            WechatDomain: b.Caller.Client.domain,
+        }
+        if err := b.hotReloadStorage.Dump(item); err != nil {
+            return err
+        }
+    }
 
-	return b.webInit()
+    return b.webInit()
 }
 
 // 根据有效凭证获取和初始化用户信息
 func (b *Bot) webInit() error {
-	req := b.storage.Request
-	info := b.storage.LoginInfo
-	// 获取初始化的用户信息和一些必要的参数
-	resp, err := b.Caller.WebInit(req)
-	if err != nil {
-		return err
-	}
-	// 设置当前的用户
-	b.self = &Self{Bot: b, User: &resp.User}
-	b.self.Self = b.self
-	b.storage.Response = resp
+    req := b.storage.Request
+    info := b.storage.LoginInfo
+    // 获取初始化的用户信息和一些必要的参数
+    resp, err := b.Caller.WebInit(req)
+    if err != nil {
+        return err
+    }
+    // 设置当前的用户
+    b.self = &Self{Bot: b, User: &resp.User}
+    b.self.Self = b.self
+    b.storage.Response = resp
 
-	// 通知手机客户端已经登录
-	if err = b.Caller.WebWxStatusNotify(req, resp, info); err != nil {
-		return err
-	}
-	// 开启协程，轮训获取是否有新的消息返回
-	go func() {
-		if b.GetMessageErrorHandler == nil {
-			b.GetMessageErrorHandler = b.stopAsyncCALL
-		}
-		if err := b.asyncCall(); err != nil {
-			b.GetMessageErrorHandler(err)
-		}
-	}()
-	return nil
+    // 通知手机客户端已经登录
+    if err = b.Caller.WebWxStatusNotify(req, resp, info); err != nil {
+        return err
+    }
+    // 开启协程，轮训获取是否有新的消息返回
+    go func() {
+        if b.GetMessageErrorHandler == nil {
+            b.GetMessageErrorHandler = b.stopAsyncCALL
+        }
+        if err := b.asyncCall(); err != nil {
+            b.GetMessageErrorHandler(err)
+        }
+    }()
+    return nil
 }
 
 // 轮训请求
 // 根据状态码判断是否有新的请求
 func (b *Bot) asyncCall() error {
-	var (
-		err  error
-		resp *SyncCheckResponse
-	)
-	for b.Alive() {
-		// 长轮训检查是否有消息返回
-		resp, err = b.Caller.SyncCheck(b.storage.LoginInfo, b.storage.Response)
-		if err != nil {
-			return err
-		}
-		// 如果不是正常的状态码返回，发生了错误，直接退出
-		if !resp.Success() {
-			return resp
-		}
-		// 如果Selector不为0，则获取消息
-		if !resp.NorMal() {
-			if err = b.getNewWechatMessage(); err != nil {
-				return err
-			}
-		}
-	}
-	return err
+    var (
+        err  error
+        resp *SyncCheckResponse
+    )
+    for b.Alive() {
+        // 长轮训检查是否有消息返回
+        resp, err = b.Caller.SyncCheck(b.storage.LoginInfo, b.storage.Response)
+        if err != nil {
+            return err
+        }
+        // 如果不是正常的状态码返回，发生了错误，直接退出
+        if !resp.Success() {
+            return resp
+        }
+        // 如果Selector不为0，则获取消息
+        if !resp.NorMal() {
+            if err = b.getNewWechatMessage(); err != nil {
+                return err
+            }
+        }
+    }
+    return err
 }
 
 // 当获取消息发生错误时, 默认的错误处理行为
 func (b *Bot) stopAsyncCALL(err error) {
-	b.cancel()
-	b.err = err
-	b.self = nil
-	log.Printf("exit with : %s", err.Error())
+    b.cancel()
+    b.err = err
+    b.self = nil
+    log.Printf("exit with : %s", err.Error())
 }
 
 // 获取新的消息
 func (b *Bot) getNewWechatMessage() error {
-	resp, err := b.Caller.WebWxSync(b.storage.Request, b.storage.Response, b.storage.LoginInfo)
-	if err != nil {
-		return err
-	}
-	// 更新SyncKey并且重新存入storage
-	b.storage.Response.SyncKey = resp.SyncKey
-	// 遍历所有的新的消息，依次处理
-	for _, message := range resp.AddMsgList {
-		// 根据不同的消息类型来进行处理，方便后续统一调用
-		message.init(b)
-		// 调用自定义的处理方法
-		if handler := b.MessageHandler; handler != nil {
-			handler(message)
-		}
-	}
-	return nil
+    resp, err := b.Caller.WebWxSync(b.storage.Request, b.storage.Response, b.storage.LoginInfo)
+    if err != nil {
+        return err
+    }
+    // 更新SyncKey并且重新存入storage
+    b.storage.Response.SyncKey = resp.SyncKey
+    // 遍历所有的新的消息，依次处理
+    for _, message := range resp.AddMsgList {
+        // 根据不同的消息类型来进行处理，方便后续统一调用
+        message.init(b)
+        // 调用自定义的处理方法
+        if handler := b.MessageHandler; handler != nil {
+            handler(message)
+        }
+    }
+    return nil
 }
 
 // 当消息同步发生了错误或者用户主动在手机上退出，该方法会立即返回，否则会一直阻塞
 func (b *Bot) Block() error {
-	if b.self == nil {
-		return errors.New("`Block` must be called after user login")
-	}
-	<-b.context.Done()
-	return nil
+    if b.self == nil {
+        return errors.New("`Block` must be called after user login")
+    }
+    <-b.context.Done()
+    return nil
 }
 
 // 获取当前Bot崩溃的原因
 func (b *Bot) CrashReason() error {
-	return b.err
+    return b.err
 }
 
 // setter for Bot.MessageHandler
 func (b *Bot) MessageOnSuccess(h func(msg *Message)) {
-	b.MessageHandler = h
+    b.MessageHandler = h
 }
 
 // setter for Bot.GetMessageErrorHandler
 func (b *Bot) MessageOnError(h func(err error)) {
-	b.GetMessageErrorHandler = h
+    b.GetMessageErrorHandler = h
 }
 
 // Bot的构造方法，需要自己传入Caller
 func NewBot(caller *Caller) *Bot {
-	ctx, cancel := context.WithCancel(context.Background())
-	return &Bot{Caller: caller, storage: &Storage{}, context: ctx, cancel: cancel}
+    ctx, cancel := context.WithCancel(context.Background())
+    return &Bot{Caller: caller, storage: &Storage{}, context: ctx, cancel: cancel}
 }
 
 // 默认的Bot的构造方法,
 // mode不传入默认为openwechat.Normal,详情见mode
 //     bot := openwechat.DefaultBot(openwechat.Desktop)
 func DefaultBot(modes ...mode) *Bot {
-	var m mode
-	if len(modes) == 0 {
-		m = Normal
-	} else {
-		m = modes[0]
-	}
-	caller := DefaultCaller()
-	caller.Client.mode = m
-	return NewBot(caller)
+    var m mode
+    if len(modes) == 0 {
+        m = Normal
+    } else {
+        m = modes[0]
+    }
+    caller := DefaultCaller()
+    caller.Client.mode = m
+    return NewBot(caller)
 }
 
 // 通过uuid获取登录二维码的url
 func GetQrcodeUrl(uuid string) string {
-	return qrcode + uuid
+    return qrcode + uuid
 }
 
 // 打印登录二维码
 func PrintlnQrcodeUrl(uuid string) {
-	println("访问下面网址扫描二维码登录")
-	println(GetQrcodeUrl(uuid))
+    println("访问下面网址扫描二维码登录")
+    println(GetQrcodeUrl(uuid))
 }
diff --git a/caller.go b/caller.go
index d15fe11..b72965c 100644
--- a/caller.go
+++ b/caller.go
@@ -1,349 +1,351 @@
 package openwechat
 
 import (
-	"errors"
-	"net/http"
-	"net/url"
-	"os"
+    "errors"
+    "net/http"
+    "net/url"
+    "os"
 )
 
 // 调用请求和解析请求
 // 上层模块可以直接获取封装后的请求结果
 type Caller struct {
-	Client *Client
+    Client *Client
+    path   *url.URL
 }
 
 // Constructor for Caller
 func NewCaller(client *Client) *Caller {
-	return &Caller{Client: client}
+    return &Caller{Client: client}
 }
 
 // Default Constructor for Caller
 func DefaultCaller() *Caller {
-	return NewCaller(DefaultClient())
+    return NewCaller(DefaultClient())
 }
 
 // 获取登录的uuid
 func (c *Caller) GetLoginUUID() (string, error) {
-	resp := NewReturnResponse(c.Client.GetLoginUUID())
-	if resp.Err() != nil {
-		return "", resp.Err()
-	}
-	defer resp.Body.Close()
-	data, err := resp.ReadAll()
-	if err != nil {
-		return "", err
-	}
-	// 正则匹配uuid字符串
-	results := uuidRegexp.FindSubmatch(data)
-	if len(results) != 2 {
-		// 如果没有匹配到,可能微信的接口做了修改，或者当前机器的ip被加入了黑名单
-		return "", errors.New("uuid does not match")
-	}
-	return string(results[1]), nil
+    resp := NewReturnResponse(c.Client.GetLoginUUID())
+    if resp.Err() != nil {
+        return "", resp.Err()
+    }
+    defer resp.Body.Close()
+    data, err := resp.ReadAll()
+    if err != nil {
+        return "", err
+    }
+    // 正则匹配uuid字符串
+    results := uuidRegexp.FindSubmatch(data)
+    if len(results) != 2 {
+        // 如果没有匹配到,可能微信的接口做了修改，或者当前机器的ip被加入了黑名单
+        return "", errors.New("uuid does not match")
+    }
+    return string(results[1]), nil
 }
 
 // 检查是否登录成功
 func (c *Caller) CheckLogin(uuid string) (*CheckLoginResponse, error) {
-	resp := NewReturnResponse(c.Client.CheckLogin(uuid))
-	if resp.Err() != nil {
-		return nil, resp.Err()
-	}
-	defer resp.Body.Close()
-	data, err := resp.ReadAll()
-	if err != nil {
-		return nil, err
-	}
-	// 正则匹配检测的code
-	// 具体code参考global.go
-	results := statusCodeRegexp.FindSubmatch(data)
-	if len(results) != 2 {
-		return nil, errors.New("error status code match")
-	}
-	code := string(results[1])
-	return &CheckLoginResponse{Code: code, Raw: data}, nil
+    resp := NewReturnResponse(c.Client.CheckLogin(uuid))
+    if resp.Err() != nil {
+        return nil, resp.Err()
+    }
+    defer resp.Body.Close()
+    data, err := resp.ReadAll()
+    if err != nil {
+        return nil, err
+    }
+    // 正则匹配检测的code
+    // 具体code参考global.go
+    results := statusCodeRegexp.FindSubmatch(data)
+    if len(results) != 2 {
+        return nil, errors.New("error status code match")
+    }
+    code := string(results[1])
+    return &CheckLoginResponse{Code: code, Raw: data}, nil
 }
 
 // 获取登录信息
 func (c *Caller) GetLoginInfo(body []byte) (*LoginInfo, error) {
-	// 从响应体里面获取需要跳转的url
-	results := redirectUriRegexp.FindSubmatch(body)
-	if len(results) != 2 {
-		return nil, errors.New("redirect url does not match")
-	}
-	path, err := url.Parse(string(results[1]))
-	if err != nil {
-		return nil, err
-	}
-	host := path.Host
-	domain, err := getDomainByHost(host)
-	if err != nil {
-		return nil, err
-	}
-	c.Client.domain = domain
-	resp := NewReturnResponse(c.Client.GetLoginInfo(path.String()))
-	if resp.Err() != nil {
-		return nil, resp.Err()
-	}
-	defer resp.Body.Close()
-	var loginInfo LoginInfo
-	// xml结构体序列化储存
-	if err := resp.ScanXML(&loginInfo); err != nil {
-		return nil, err
-	}
-	if !loginInfo.Ok() {
-		return nil, loginInfo
-	}
-	return &loginInfo, nil
+    // 从响应体里面获取需要跳转的url
+    results := redirectUriRegexp.FindSubmatch(body)
+    if len(results) != 2 {
+        return nil, errors.New("redirect url does not match")
+    }
+    path, err := url.Parse(string(results[1]))
+    if err != nil {
+        return nil, err
+    }
+
+    domain, err := getDomainByHost(path.Host)
+    if err != nil {
+        return nil, err
+    }
+    c.Client.domain = domain
+
+    resp := NewReturnResponse(c.Client.GetLoginInfo(path.String()))
+    if resp.Err() != nil {
+        return nil, resp.Err()
+    }
+    defer resp.Body.Close()
+    var loginInfo LoginInfo
+    // xml结构体序列化储存
+    if err := resp.ScanXML(&loginInfo); err != nil {
+        return nil, err
+    }
+    if !loginInfo.Ok() {
+        return nil, loginInfo
+    }
+    return &loginInfo, nil
 }
 
 // 获取初始化信息
 func (c *Caller) WebInit(request *BaseRequest) (*WebInitResponse, error) {
-	resp := NewReturnResponse(c.Client.WebInit(request))
-	if resp.Err() != nil {
-		return nil, resp.Err()
-	}
-	var webInitResponse WebInitResponse
-	defer resp.Body.Close()
-	if err := resp.ScanJSON(&webInitResponse); err != nil {
-		return nil, err
-	}
-	return &webInitResponse, nil
+    resp := NewReturnResponse(c.Client.WebInit(request))
+    if resp.Err() != nil {
+        return nil, resp.Err()
+    }
+    var webInitResponse WebInitResponse
+    defer resp.Body.Close()
+    if err := resp.ScanJSON(&webInitResponse); err != nil {
+        return nil, err
+    }
+    return &webInitResponse, nil
 }
 
 // 通知手机已登录
 func (c *Caller) WebWxStatusNotify(request *BaseRequest, response *WebInitResponse, info *LoginInfo) error {
-	resp := NewReturnResponse(c.Client.WebWxStatusNotify(request, response, info))
-	if resp.Err() != nil {
-		return resp.Err()
-	}
-	var item struct{ BaseResponse BaseResponse }
-	defer resp.Body.Close()
-	if err := resp.ScanJSON(&item); err != nil {
-		return err
-	}
-	if !item.BaseResponse.Ok() {
-		return item.BaseResponse
-	}
-	return nil
+    resp := NewReturnResponse(c.Client.WebWxStatusNotify(request, response, info))
+    if resp.Err() != nil {
+        return resp.Err()
+    }
+    var item struct{ BaseResponse BaseResponse }
+    defer resp.Body.Close()
+    if err := resp.ScanJSON(&item); err != nil {
+        return err
+    }
+    if !item.BaseResponse.Ok() {
+        return item.BaseResponse
+    }
+    return nil
 }
 
 // 异步获取是否有新的消息
 func (c *Caller) SyncCheck(info *LoginInfo, response *WebInitResponse) (*SyncCheckResponse, error) {
-	resp := NewReturnResponse(c.Client.SyncCheck(info, response))
-	if resp.Err() != nil {
-		return nil, resp.Err()
-	}
-	defer resp.Body.Close()
-	data, err := resp.ReadAll()
-	if err != nil {
-		return nil, err
-	}
-	results := syncCheckRegexp.FindSubmatch(data)
-	if len(results) != 3 {
-		return nil, errors.New("parse sync key failed")
-	}
-	retCode, selector := string(results[1]), string(results[2])
-	syncCheckResponse := &SyncCheckResponse{RetCode: retCode, Selector: selector}
-	return syncCheckResponse, nil
+    resp := NewReturnResponse(c.Client.SyncCheck(info, response))
+    if resp.Err() != nil {
+        return nil, resp.Err()
+    }
+    defer resp.Body.Close()
+    data, err := resp.ReadAll()
+    if err != nil {
+        return nil, err
+    }
+    results := syncCheckRegexp.FindSubmatch(data)
+    if len(results) != 3 {
+        return nil, errors.New("parse sync key failed")
+    }
+    retCode, selector := string(results[1]), string(results[2])
+    syncCheckResponse := &SyncCheckResponse{RetCode: retCode, Selector: selector}
+    return syncCheckResponse, nil
 }
 
 // 获取所有的联系人
 func (c *Caller) WebWxGetContact(info *LoginInfo) (Members, error) {
-	resp := NewReturnResponse(c.Client.WebWxGetContact(info))
-	if resp.Err() != nil {
-		return nil, resp.Err()
-	}
-	defer resp.Body.Close()
-	var item WebWxContactResponse
-	if err := resp.ScanJSON(&item); err != nil {
-		return nil, err
-	}
-	if !item.BaseResponse.Ok() {
-		return nil, item.BaseResponse
-	}
-	return item.MemberList, nil
+    resp := NewReturnResponse(c.Client.WebWxGetContact(info))
+    if resp.Err() != nil {
+        return nil, resp.Err()
+    }
+    defer resp.Body.Close()
+    var item WebWxContactResponse
+    if err := resp.ScanJSON(&item); err != nil {
+        return nil, err
+    }
+    if !item.BaseResponse.Ok() {
+        return nil, item.BaseResponse
+    }
+    return item.MemberList, nil
 }
 
 // 获取联系人的详情
 // 注: Members参数的长度不要大于50
 func (c *Caller) WebWxBatchGetContact(members Members, request *BaseRequest) (Members, error) {
-	resp := NewReturnResponse(c.Client.WebWxBatchGetContact(members, request))
-	if resp.Err() != nil {
-		return nil, resp.Err()
-	}
-	defer resp.Body.Close()
-	var item WebWxBatchContactResponse
-	if err := resp.ScanJSON(&item); err != nil {
-		return nil, err
-	}
-	if !item.BaseResponse.Ok() {
-		return nil, item.BaseResponse
-	}
-	return item.ContactList, nil
+    resp := NewReturnResponse(c.Client.WebWxBatchGetContact(members, request))
+    if resp.Err() != nil {
+        return nil, resp.Err()
+    }
+    defer resp.Body.Close()
+    var item WebWxBatchContactResponse
+    if err := resp.ScanJSON(&item); err != nil {
+        return nil, err
+    }
+    if !item.BaseResponse.Ok() {
+        return nil, item.BaseResponse
+    }
+    return item.ContactList, nil
 }
 
 // 获取新的消息接口
 func (c *Caller) WebWxSync(request *BaseRequest, response *WebInitResponse, info *LoginInfo) (*WebWxSyncResponse, error) {
-	resp := NewReturnResponse(c.Client.WebWxSync(request, response, info))
-	if resp.Err() != nil {
-		return nil, resp.Err()
-	}
-	defer resp.Body.Close()
-	var webWxSyncResponse WebWxSyncResponse
-	if err := resp.ScanJSON(&webWxSyncResponse); err != nil {
-		return nil, err
-	}
-	return &webWxSyncResponse, nil
+    resp := NewReturnResponse(c.Client.WebWxSync(request, response, info))
+    if resp.Err() != nil {
+        return nil, resp.Err()
+    }
+    defer resp.Body.Close()
+    var webWxSyncResponse WebWxSyncResponse
+    if err := resp.ScanJSON(&webWxSyncResponse); err != nil {
+        return nil, err
+    }
+    return &webWxSyncResponse, nil
 }
 
 // 发送消息接口
 func (c *Caller) WebWxSendMsg(msg *SendMessage, info *LoginInfo, request *BaseRequest) (*SentMessage, error) {
-	resp, err := c.Client.WebWxSendMsg(msg, info, request)
-	return getSuccessSentMessage(msg, resp, err)
+    resp, err := c.Client.WebWxSendMsg(msg, info, request)
+    return getSuccessSentMessage(msg, resp, err)
 }
 
 // 修改用户备注接口
 func (c *Caller) WebWxOplog(request *BaseRequest, remarkName, toUserName string) error {
-	resp := NewReturnResponse(c.Client.WebWxOplog(request, remarkName, toUserName))
-	return parseBaseResponseError(resp)
+    resp := NewReturnResponse(c.Client.WebWxOplog(request, remarkName, toUserName))
+    return parseBaseResponseError(resp)
 }
 
 func (c *Caller) UploadMedia(file *os.File, request *BaseRequest, info *LoginInfo, fromUserName, toUserName string) (*UploadResponse, error) {
-	// 首先尝试上传图片
-	resp := NewReturnResponse(c.Client.WebWxUploadMediaByChunk(file, request, info, fromUserName, toUserName))
-	// 无错误上传成功之后获取请求结果，判断结果是否正常
-	if resp.Err() != nil {
-		return nil, resp.Err()
-	}
-	defer resp.Body.Close()
+    // 首先尝试上传图片
+    resp := NewReturnResponse(c.Client.WebWxUploadMediaByChunk(file, request, info, fromUserName, toUserName))
+    // 无错误上传成功之后获取请求结果，判断结果是否正常
+    if resp.Err() != nil {
+        return nil, resp.Err()
+    }
+    defer resp.Body.Close()
 
-	var item UploadResponse
+    var item UploadResponse
 
-	if err := resp.ScanJSON(&item); err != nil {
-		return &item, err
-	}
-	if !item.BaseResponse.Ok() {
-		return &item, item.BaseResponse
-	}
-	if len(item.MediaId) == 0 {
-		return &item, errors.New("upload failed")
-	}
-	return &item, nil
+    if err := resp.ScanJSON(&item); err != nil {
+        return &item, err
+    }
+    if !item.BaseResponse.Ok() {
+        return &item, item.BaseResponse
+    }
+    if len(item.MediaId) == 0 {
+        return &item, errors.New("upload failed")
+    }
+    return &item, nil
 }
 
 // 发送图片消息接口
 func (c *Caller) WebWxSendImageMsg(file *os.File, request *BaseRequest, info *LoginInfo, fromUserName, toUserName string) (*SentMessage, error) {
-	// 首先尝试上传图片
-	resp, err := c.UploadMedia(file, request, info, fromUserName, toUserName)
-	if err != nil {
-		return nil, err
-	}
-	// 构造新的图片类型的信息
-	msg := NewMediaSendMessage(ImageMessage, fromUserName, toUserName, resp.MediaId)
-	// 发送图片信息
-	resp1, err := c.Client.WebWxSendMsgImg(msg, request, info)
-	return getSuccessSentMessage(msg, resp1, err)
+    // 首先尝试上传图片
+    resp, err := c.UploadMedia(file, request, info, fromUserName, toUserName)
+    if err != nil {
+        return nil, err
+    }
+    // 构造新的图片类型的信息
+    msg := NewMediaSendMessage(ImageMessage, fromUserName, toUserName, resp.MediaId)
+    // 发送图片信息
+    resp1, err := c.Client.WebWxSendMsgImg(msg, request, info)
+    return getSuccessSentMessage(msg, resp1, err)
 }
 
 func (c *Caller) WebWxSendFile(file *os.File, req *BaseRequest, info *LoginInfo, fromUserName, toUserName string) (*SentMessage, error) {
-	resp, err := c.UploadMedia(file, req, info, fromUserName, toUserName)
-	if err != nil {
-		return nil, err
-	}
-	// 构造新的文件类型的信息
-	stat, _ := file.Stat()
-	appMsg := NewFileAppMessage(stat, resp.MediaId)
-	content, err := appMsg.XmlByte()
-	if err != nil {
-		return nil, err
-	}
-	msg := NewSendMessage(AppMessage, string(content), fromUserName, toUserName, "")
-	return c.WebWxSendAppMsg(msg, req)
+    resp, err := c.UploadMedia(file, req, info, fromUserName, toUserName)
+    if err != nil {
+        return nil, err
+    }
+    // 构造新的文件类型的信息
+    stat, _ := file.Stat()
+    appMsg := NewFileAppMessage(stat, resp.MediaId)
+    content, err := appMsg.XmlByte()
+    if err != nil {
+        return nil, err
+    }
+    msg := NewSendMessage(AppMessage, string(content), fromUserName, toUserName, "")
+    return c.WebWxSendAppMsg(msg, req)
 }
 
 // 发送媒体消息
 func (c *Caller) WebWxSendAppMsg(msg *SendMessage, req *BaseRequest) (*SentMessage, error) {
-	resp, err := c.Client.WebWxSendAppMsg(msg, req)
-	return getSuccessSentMessage(msg, resp, err)
+    resp, err := c.Client.WebWxSendAppMsg(msg, req)
+    return getSuccessSentMessage(msg, resp, err)
 }
 
 // 用户退出
 func (c *Caller) Logout(info *LoginInfo) error {
-	resp := NewReturnResponse(c.Client.Logout(info))
-	return parseBaseResponseError(resp)
+    resp := NewReturnResponse(c.Client.Logout(info))
+    return parseBaseResponseError(resp)
 }
 
 // 拉好友入群
 func (c *Caller) AddFriendIntoChatRoom(req *BaseRequest, info *LoginInfo, group *Group, friends ...*Friend) error {
-	if len(friends) == 0 {
-		return errors.New("no friends found")
-	}
-	resp := NewReturnResponse(c.Client.AddMemberIntoChatRoom(req, info, group, friends...))
-	return parseBaseResponseError(resp)
+    if len(friends) == 0 {
+        return errors.New("no friends found")
+    }
+    resp := NewReturnResponse(c.Client.AddMemberIntoChatRoom(req, info, group, friends...))
+    return parseBaseResponseError(resp)
 }
 
 // 从群聊中移除用户
 func (c *Caller) RemoveFriendFromChatRoom(req *BaseRequest, info *LoginInfo, group *Group, users ...*User) error {
-	if len(users) == 0 {
-		return errors.New("no users found")
-	}
-	resp := NewReturnResponse(c.Client.RemoveMemberFromChatRoom(req, info, group, users...))
-	return parseBaseResponseError(resp)
+    if len(users) == 0 {
+        return errors.New("no users found")
+    }
+    resp := NewReturnResponse(c.Client.RemoveMemberFromChatRoom(req, info, group, users...))
+    return parseBaseResponseError(resp)
 }
 
 // 同意加好友请求
 func (c *Caller) WebWxVerifyUser(storage *Storage, info RecommendInfo, verifyContent string) error {
-	resp := NewReturnResponse(c.Client.WebWxVerifyUser(storage, info, verifyContent))
-	return parseBaseResponseError(resp)
+    resp := NewReturnResponse(c.Client.WebWxVerifyUser(storage, info, verifyContent))
+    return parseBaseResponseError(resp)
 }
 
 // 撤回消息操作
 func (c *Caller) WebWxRevokeMsg(msg *SentMessage, request *BaseRequest) error {
-	resp := NewReturnResponse(c.Client.WebWxRevokeMsg(msg, request))
-	return parseBaseResponseError(resp)
+    resp := NewReturnResponse(c.Client.WebWxRevokeMsg(msg, request))
+    return parseBaseResponseError(resp)
 }
 
 // 处理响应返回的结果是否正常
 func parseBaseResponseError(resp *ReturnResponse) error {
-	if resp.Err() != nil {
-		return resp.Err()
-	}
-	defer resp.Body.Close()
-	var item struct{ BaseResponse BaseResponse }
-	if err := resp.ScanJSON(&item); err != nil {
-		return err
-	}
-	if !item.BaseResponse.Ok() {
-		return item.BaseResponse
-	}
-	return nil
+    if resp.Err() != nil {
+        return resp.Err()
+    }
+    defer resp.Body.Close()
+    var item struct{ BaseResponse BaseResponse }
+    if err := resp.ScanJSON(&item); err != nil {
+        return err
+    }
+    if !item.BaseResponse.Ok() {
+        return item.BaseResponse
+    }
+    return nil
 }
 
 func parseMessageResponseError(resp *ReturnResponse, msg *SentMessage) error {
-	if resp.Err() != nil {
-		return resp.Err()
-	}
+    if resp.Err() != nil {
+        return resp.Err()
+    }
 
-	defer resp.Body.Close()
+    defer resp.Body.Close()
 
-	var messageResp MessageResponse
+    var messageResp MessageResponse
 
-	if err := resp.ScanJSON(&messageResp); err != nil {
-		return err
-	}
+    if err := resp.ScanJSON(&messageResp); err != nil {
+        return err
+    }
 
-	if !messageResp.BaseResponse.Ok() {
-		return messageResp.BaseResponse
-	}
-	// 发送成功之后将msgId赋值给SendMessage
-	msg.MsgId = messageResp.MsgID
-	return nil
+    if !messageResp.BaseResponse.Ok() {
+        return messageResp.BaseResponse
+    }
+    // 发送成功之后将msgId赋值给SendMessage
+    msg.MsgId = messageResp.MsgID
+    return nil
 }
 
 func getSuccessSentMessage(msg *SendMessage, resp *http.Response, err error) (*SentMessage, error) {
-	returnResp := NewReturnResponse(resp, err)
-	sendSuccessMsg := &SentMessage{SendMessage: msg}
-	err = parseMessageResponseError(returnResp, sendSuccessMsg)
-	return sendSuccessMsg, err
+    returnResp := NewReturnResponse(resp, err)
+    sendSuccessMsg := &SentMessage{SendMessage: msg}
+    err = parseMessageResponseError(returnResp, sendSuccessMsg)
+    return sendSuccessMsg, err
 }
diff --git a/client.go b/client.go
index 1e54d32..65ea6fe 100644
--- a/client.go
+++ b/client.go
@@ -40,7 +40,7 @@ func (u UserAgentHook) AfterRequest(response *http.Response, err error) {}
 type Client struct {
 	HttpHooks HttpHooks
 	*http.Client
-	domain  *domain
+	domain  *WechatDomain
 	mode    mode
 	mu      sync.Mutex
 	cookies map[string][]*http.Cookie
diff --git a/stroage.go b/stroage.go
index 497ffb8..d7abcfe 100644
--- a/stroage.go
+++ b/stroage.go
@@ -1,88 +1,81 @@
 package openwechat
 
 import (
-	"bytes"
-	"encoding/json"
-	"net/http"
-	"os"
+    "bytes"
+    "encoding/json"
+    "net/http"
+    "os"
 )
 
 // 身份信息, 维持整个登陆的Session会话
 type Storage struct {
-	LoginInfo *LoginInfo
-	Request   *BaseRequest
-	Response  *WebInitResponse
+    LoginInfo *LoginInfo
+    Request   *BaseRequest
+    Response  *WebInitResponse
+}
+
+type HotReloadStorageItem struct {
+    Cookies      map[string][]*http.Cookie
+    BaseRequest  *BaseRequest
+    LoginInfo    *LoginInfo
+    WechatDomain *WechatDomain
 }
 
 // 热登陆存储接口
 type HotReloadStorage interface {
-	GetCookie() map[string][]*http.Cookie                                            // 获取client.cookie
-	GetBaseRequest() *BaseRequest                                                    // 获取BaseRequest
-	GetLoginInfo() *LoginInfo                                                        // 获取LoginInfo
-	Dump(cookies map[string][]*http.Cookie, req *BaseRequest, info *LoginInfo) error // 实现该方法, 将必要信息进行序列化
-	Load() error                                                                     // 实现该方法, 将存储媒介的内容反序列化
+    GetHotReloadStorageItem() HotReloadStorageItem // 获取HotReloadStorageItem
+    Dump(item HotReloadStorageItem) error          // 实现该方法, 将必要信息进行序列化
+    Load() error                                   // 实现该方法, 将存储媒介的内容反序列化
 }
 
 // 实现HotReloadStorage接口
 // 默认以json文件的形式存储
 type JsonFileHotReloadStorage struct {
-	Cookie   map[string][]*http.Cookie
-	Req      *BaseRequest
-	Info     *LoginInfo
-	filename string
+    item     HotReloadStorageItem
+    filename string
 }
 
 // 将信息写入json文件
-func (f *JsonFileHotReloadStorage) Dump(cookies map[string][]*http.Cookie, req *BaseRequest, info *LoginInfo) error {
+func (f *JsonFileHotReloadStorage) Dump(item HotReloadStorageItem) error {
 
-	file, err := os.OpenFile(f.filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, os.ModePerm)
+    file, err := os.OpenFile(f.filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, os.ModePerm)
 
-	if err != nil {
-		return err
-	}
+    if err != nil {
+        return err
+    }
 
-	defer file.Close()
+    defer file.Close()
 
-	f.Cookie = cookies
-	f.Req = req
-	f.Info = info
+    f.item = item
 
-	data, err := json.Marshal(f)
-	if err != nil {
-		return err
-	}
-	_, err = file.Write(data)
-	return err
+    data, err := json.Marshal(f.item)
+    if err != nil {
+        return err
+    }
+    _, err = file.Write(data)
+    return err
 }
 
 // 从文件中读取信息
 func (f *JsonFileHotReloadStorage) Load() error {
-	file, err := os.Open(f.filename)
+    file, err := os.Open(f.filename)
 
-	if err != nil {
-		return err
-	}
-	defer file.Close()
-	var buffer bytes.Buffer
-	if _, err := buffer.ReadFrom(file); err != nil {
-		return err
-	}
-	err = json.Unmarshal(buffer.Bytes(), f)
-	return err
+    if err != nil {
+        return err
+    }
+    defer file.Close()
+    var buffer bytes.Buffer
+    if _, err := buffer.ReadFrom(file); err != nil {
+        return err
+    }
+    err = json.Unmarshal(buffer.Bytes(), &f.item)
+    return err
 }
 
-func (f *JsonFileHotReloadStorage) GetCookie() map[string][]*http.Cookie {
-	return f.Cookie
-}
-
-func (f *JsonFileHotReloadStorage) GetBaseRequest() *BaseRequest {
-	return f.Req
-}
-
-func (f *JsonFileHotReloadStorage) GetLoginInfo() *LoginInfo {
-	return f.Info
+func (f *JsonFileHotReloadStorage) GetHotReloadStorageItem() HotReloadStorageItem {
+    return f.item
 }
 
 func NewJsonFileHotReloadStorage(filename string) *JsonFileHotReloadStorage {
-	return &JsonFileHotReloadStorage{filename: filename}
+    return &JsonFileHotReloadStorage{filename: filename}
 }
diff --git a/url.go b/url.go
index c12736b..3f2bb99 100644
--- a/url.go
+++ b/url.go
@@ -47,18 +47,18 @@ var domainMap = map[string][]string{
 	"wechat.com":      {"https://wechat.com", "https://file.web.wechat.com", "https://webpush.web.wechat.com"},
 }
 
-func getDomainByHost(host string) (*domain, error) {
+func getDomainByHost(host string) (*WechatDomain, error) {
 	value, exist := domainMap[host]
 	if !exist {
 		return nil, errors.New("invalid host")
 	}
-	return &domain{
+	return &WechatDomain{
 		BaseHost: value[0],
 		FileHost: value[1],
 		SyncHost: value[2],
 	}, nil
 }
 
-type domain struct {
+type WechatDomain struct {
 	BaseHost, FileHost, SyncHost string
 }