优化短信发送逻辑，支持可选业务类型参数

const.go

@@ -35,3 +35,17 @@ var smsBusinessWithRequestPath = map[SmsBusiness]RequestPath{
 	SmsBusinessHs:      sendSmsHs,
 	SmsBusinessDefault: sendSms,
 }
+
+type (
+	SmsOption     func(*SmsOptionData)
+	SmsOptionData struct {
+		Business SmsBusiness
+	}
+)
+
+func WithBusiness(business SmsBusiness) SmsOption {
+
+	return func(OptionData *SmsOptionData) {
+		OptionData.Business = business
+	}
+}

msg.go

@@ -58,19 +58,27 @@ func (m *MessageCenter) OAGetDetail(outTradeNo string) (data OAGetDetailData, er
 
 // SendSms 短信
 // business  SmsBusiness
-func (m *MessageCenter) SendSms(tels []string, jsonParam string, business SmsBusiness) (data SmsSend, err error) {
+func (m *MessageCenter) SendSms(tels []string, jsonParam string, args ...SmsOption) (data SmsSend, err error) {
 	var (
-		path RequestPath
-		ex   bool
+		e = new(SmsOptionData)
 	)
 	if len(tels) == 0 {
 		err = errors.New("手机号不能为空")
 		return
 	}
-	if path, ex = smsBusinessWithRequestPath[business]; !ex {
-		err = errors.New("未知的供应商")
+	for _, arg := range args {
+		arg(e)
+	}
+	if e.Business != "" {
+		if _, ex := smsBusinessWithRequestPath[e.Business]; !ex {
+			err = errors.New("business参数错误")
 			return
 		}
+	} else {
+		e.Business = SmsBusinessDefault
+	}
+	path := smsBusinessWithRequestPath[e.Business]
+
 	param := m.parseSmsSendParam(tels, jsonParam)
 	err = m.post(path, param, &data)
 	if err != nil {