[feature] Format the code and improve Mini Program authorization to o… (#473)

* [feature] Format the code and improve Mini Program authorization to obtain openid（miniprogram/auth/auth.go Code2Session）

* [feature] CheckEncryptedData (https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/user-info/auth.checkEncryptedData.html)

* upgrade json error

* upgrade json error

Co-authored-by: houseme <houseme@outlook.com>

credential/default_js_ticket.go

@@ -10,19 +10,19 @@ import (
 	"github.com/silenceper/wechat/v2/util"
 )
 
-//获取ticket的url
+// getTicketURL 获取ticket的url
 const getTicketURL = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=%s&type=jsapi"
 
-//DefaultJsTicket 默认获取js ticket方法
+// DefaultJsTicket 默认获取js ticket方法
 type DefaultJsTicket struct {
 	appID          string
 	cacheKeyPrefix string
 	cache          cache.Cache
-	//jsAPITicket 读写锁 同一个AppID一个
+	// jsAPITicket 读写锁 同一个AppID一个
 	jsAPITicketLock *sync.Mutex
 }
 
-//NewDefaultJsTicket new
+// NewDefaultJsTicket new
 func NewDefaultJsTicket(appID string, cacheKeyPrefix string, cache cache.Cache) JsTicketHandle {
 	return &DefaultJsTicket{
 		appID:           appID,
@@ -40,9 +40,9 @@ type ResTicket struct {
 	ExpiresIn int64  `json:"expires_in"`
 }
 
-//GetTicket 获取jsapi_ticket
+// GetTicket 获取jsapi_ticket
 func (js *DefaultJsTicket) GetTicket(accessToken string) (ticketStr string, err error) {
-	//先从cache中取
+	// 先从cache中取
 	jsAPITicketCacheKey := fmt.Sprintf("%s_jsapi_ticket_%s", js.cacheKeyPrefix, js.appID)
 	if val := js.cache.Get(jsAPITicketCacheKey); val != nil {
 		return val.(string), nil
@@ -67,7 +67,7 @@ func (js *DefaultJsTicket) GetTicket(accessToken string) (ticketStr string, err
 	return
 }
 
-//GetTicketFromServer 从服务器中获取ticket
+// GetTicketFromServer 从服务器中获取ticket
 func GetTicketFromServer(accessToken string) (ticket ResTicket, err error) {
 	var response []byte
 	url := fmt.Sprintf(getTicketURL, accessToken)