删除冗余的代码

bot.go

@@ -1,6 +1,7 @@
 package openwechat
 
 import (
+	"context"
 	"errors"
 	"log"
 	"net/url"
@@ -14,7 +15,8 @@ type Bot struct {
 	GetMessageErrorHandler func(err error)    // 获取消息发生错误的handle
 	isHot                  bool
 	err                    error
-    exit                   chan bool
+	context                context.Context
+	cancel                 context.CancelFunc
 	Caller                 *Caller
 	self                   *Self
 	storage                *Storage
@@ -27,7 +29,7 @@ func (b *Bot) Alive() bool {
 		return false
 	}
 	select {
-    case <-b.exit:
+	case <-b.context.Done():
 		return false
 	default:
 		return true
@@ -236,7 +238,7 @@ func (b *Bot) asyncCall() error {
 
 // 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.exit <- true
+	b.cancel()
 	b.err = err
 	b.self = nil
 	log.Printf("exit with : %s", err.Error())
@@ -267,10 +269,7 @@ func (b *Bot) Block() error {
 	if b.self == nil {
 		return errors.New("`Block` must be called after user login")
 	}
-    if _, notClose := <-b.exit; !notClose {
-        return errors.New("can not call `Block` after user logout")
-    }
-    close(b.exit)
+	<-b.context.Done()
 	return nil
 }
 
@@ -291,7 +290,8 @@ func (b *Bot) MessageOnError(h func(err error)) {
 
 // Bot的构造方法，需要自己传入Caller
 func NewBot(caller *Caller) *Bot {
-    return &Bot{Caller: caller, storage: &Storage{}, exit: make(chan bool)}
+	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,

client.go

@@ -230,8 +230,6 @@ func (c *Client) sendMessage(request *BaseRequest, url string, msg *SendMessage)
 	body, _ := ToBuffer(content)
 	req, _ := http.NewRequest(http.MethodPost, url, body)
 	req.Header.Add("Content-Type", jsonContentType)
-	fmt.Println(6666)
-	fmt.Println(body.String())
 	return c.Do(req)
 }
 

global.go

@@ -124,3 +124,5 @@ var imageType = map[string]bool{
 }
 
 var videoType = "mp4"
+
+const appMessageAppId = "wxeb7ec651dd0aefa9"

message.go

@@ -495,7 +495,7 @@ func (f appmsg) XmlByte() ([]byte, error) {
 }
 
 func NewFileAppMessage(stat os.FileInfo, attachId string) *appmsg {
-	m := &appmsg{AppId: "wxeb7ec651dd0aefa9", Title: stat.Name()}
+	m := &appmsg{AppId: appMessageAppId, Title: stat.Name()}
 	m.AppAttach.AttachId = attachId
 	m.AppAttach.TotalLen = stat.Size()
 	m.Type = 6