ddns: store configuation in database (#435)

* ddns: store configuation in database

Co-authored-by: nap0o <144927971+nap0o@users.noreply.github.com>

* feat: split domain with soa lookup

* switch to libdns interface

* ddns: add unit test

* ddns: skip TestSplitDomainSOA on ci

network is not steady

* fix error handling

* fix error handling

---------

Co-authored-by: nap0o <144927971+nap0o@users.noreply.github.com>

pkg/utils/gjson.go

@@ -21,6 +21,10 @@ func GjsonGet(json []byte, path string) (gjson.Result, error) {
 }
 
 func GjsonParseStringMap(jsonObject string) (map[string]string, error) {
+	if jsonObject == "" {
+		return nil, nil
+	}
+
 	result := gjson.Parse(jsonObject)
 	if !result.IsObject() {
 		return nil, ErrGjsonWrongType

pkg/utils/http.go

@@ -22,6 +22,8 @@ func init() {
 			SkipVerifySSL: false,
 		}),
 	})
+
+	http.DefaultClient.Timeout = time.Minute * 10
 }
 
 type _httpTransport struct {

pkg/utils/utils.go

@@ -3,7 +3,6 @@ package utils
 import (
 	"crypto/rand"
 	"math/big"
-	"net/http"
 	"os"
 	"regexp"
 	"strings"
@@ -11,7 +10,11 @@ import (
 	jsoniter "github.com/json-iterator/go"
 )
 
-var Json = jsoniter.ConfigCompatibleWithStandardLibrary
+var (
+	Json = jsoniter.ConfigCompatibleWithStandardLibrary
+
+	DNSServers = []string{"1.1.1.1:53", "223.5.5.5:53", "[2606:4700:4700::1111]:53", "[2400:3200::1]:53"}
+)
 
 func IsWindows() bool {
 	return os.PathSeparator == '\\' && os.PathListSeparator == ';'
@@ -87,15 +90,3 @@ func Uint64SubInt64(a uint64, b int64) uint64 {
 	}
 	return a - uint64(b)
 }
-
-func SetStringHeadersToRequest(req *http.Request, headers []string) {
-	if req == nil {
-		return
-	}
-	for _, element := range headers {
-		kv := strings.SplitN(element, ":", 2)
-		if len(kv) == 2 {
-			req.Header.Add(kv[0], kv[1])
-		}
-	}
-}