Added backend generated dns providers arch

- Added acmedns
- Added auto dns credential form generator

src/mod/acme/acmedns/providerutils.go

@@ -0,0 +1,80 @@
+package acmedns
+
+import (
+	_ "embed"
+	"encoding/json"
+	"errors"
+	"net/http"
+
+	"imuslab.com/zoraxy/mod/utils"
+)
+
+//go:embed providers.json
+var providers []byte //A list of providers generated by acmedns code-generator
+
+type ConfigTemplate struct {
+	Name             string `json:"Name"`
+	ConfigableFields []struct {
+		Title    string `json:"Title"`
+		Datatype string `json:"Datatype"`
+	} `json:"ConfigableFields"`
+	HiddenFields []struct {
+		Title    string `json:"Title"`
+		Datatype string `json:"Datatype"`
+	} `json:"HiddenFields"`
+}
+
+// Return a map of string => datatype
+func GetProviderConfigStructure(providerName string) (map[string]string, error) {
+	//Load the target config template from embedded providers.json
+	configTemplateMap := map[string]ConfigTemplate{}
+	err := json.Unmarshal(providers, &configTemplateMap)
+	if err != nil {
+		return map[string]string{}, err
+	}
+
+	targetConfigTemplate, ok := configTemplateMap[providerName]
+	if !ok {
+		return map[string]string{}, errors.New("provider not supported")
+	}
+
+	results := map[string]string{}
+	for _, field := range targetConfigTemplate.ConfigableFields {
+		results[field.Title] = field.Datatype
+	}
+
+	return results, nil
+}
+
+// HandleServeProvidersJson return the list of supported providers as json
+func HandleServeProvidersJson(w http.ResponseWriter, r *http.Request) {
+	providerName, _ := utils.GetPara(r, "name")
+	if providerName == "" {
+		//Send the current list of providers
+		configTemplateMap := map[string]ConfigTemplate{}
+		err := json.Unmarshal(providers, &configTemplateMap)
+		if err != nil {
+			utils.SendErrorResponse(w, "failed to load DNS provider")
+			return
+		}
+
+		//Parse the provider names into an array
+		providers := []string{}
+		for providerName, _ := range configTemplateMap {
+			providers = append(providers, providerName)
+		}
+
+		js, _ := json.Marshal(providers)
+		utils.SendJSONResponse(w, string(js))
+		return
+	}
+	//Get the config for that provider
+	confTemplate, err := GetProviderConfigStructure(providerName)
+	if err != nil {
+		utils.SendErrorResponse(w, err.Error())
+		return
+	}
+
+	js, _ := json.Marshal(confTemplate)
+	utils.SendJSONResponse(w, string(js))
+}