迁移并重构项目，优化了执行流程

internal/class/DNSProvider/Object.go

@@ -0,0 +1,43 @@
+package DNSProvider
+
+import (
+	"reflect"
+
+	"github.com/go-acme/lego/v4/challenge"
+)
+
+type Object struct {
+	TencentCloud TencentCloud `json:"TencentCloud,omitempty"`
+	AliCloud     AliCloud     `json:"AliCloud,omitempty"`
+	HuaweiCloud  HuaweiCloud  `json:"HuaweiCloud,omitempty"`
+	WestCN       WestCN       `json:"WestCN,omitempty"`
+	RainYun      RainYun      `json:"RainYun,omitempty"`
+	Dode         Dode         `json:"Dode,omitempty"`
+}
+
+func (dnsProvider *Object) Choose() ([]challenge.Provider, []error) {
+
+	var Providers []challenge.Provider
+	var Errors []error
+	v := reflect.ValueOf(dnsProvider).Elem()
+
+	for i := 0; i < v.NumField(); i++ {
+		field := v.Field(i)
+		if field.Kind() == reflect.Struct {
+			for ii := 0; ii < field.NumField(); ii++ {
+				if field.Field(ii).String() != "" {
+					method, _ := field.Type().MethodByName("Provider")
+					results := method.Func.Call([]reflect.Value{field})
+					err, _ := results[1].Interface().(error)
+					if err != nil {
+						Errors = append(Errors, err)
+					} else {
+						Providers = append(Providers, results[0].Interface().(challenge.Provider))
+					}
+					break
+				}
+			}
+		}
+	}
+	return Providers, Errors
+}