[功能] 添加OpenRestyResolvers支持，优化DNS解析器配置和验证逻辑

openflare_server/controller/option.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"github.com/gin-gonic/gin"
+	"net"
 	"net/http"
 	"openflare/common"
 	"openflare/model"
@@ -113,6 +114,16 @@ func validateOpenRestyOption(key string, value string) error {
 		default:
 			return fmt.Errorf("%s 仅支持 epoll、kqueue、poll、select、rtsig、/dev/poll、eventport 或留空", key)
 		}
+	case "OpenRestyResolvers":
+		if trimmed == "" {
+			return nil
+		}
+		for _, token := range splitOpenRestyResolvers(trimmed) {
+			if net.ParseIP(token) == nil {
+				return fmt.Errorf("%s only supports IP resolver entries, invalid value %q", key, token)
+			}
+		}
+		return nil
 	case "OpenRestyEventsMultiAcceptEnabled",
 		"OpenRestyWebsocketEnabled",
 		"OpenRestyProxyRequestBufferingEnabled",
@@ -176,6 +187,12 @@ func validateOpenRestyOption(key string, value string) error {
 	}
 }
 
+func splitOpenRestyResolvers(value string) []string {
+	return strings.FieldsFunc(value, func(r rune) bool {
+		return r == ',' || r == '\n' || r == '\r' || r == '\t' || r == ' '
+	})
+}
+
 // GetOptions godoc
 // @Summary List editable options
 // @Tags Options

openflare_server/controller/option_test.go

@@ -32,6 +32,9 @@ func TestValidateOpenRestyOption(t *testing.T) {
 		{name: "cache use stale invalid", key: "OpenRestyCacheUseStale", value: "error whatever", wantErr: true},
 		{name: "gzip level valid", key: "OpenRestyGzipCompLevel", value: "9"},
 		{name: "gzip level invalid", key: "OpenRestyGzipCompLevel", value: "10", wantErr: true},
+		{name: "resolvers empty", key: "OpenRestyResolvers", value: ""},
+		{name: "resolvers valid", key: "OpenRestyResolvers", value: "1.1.1.1, 8.8.8.8"},
+		{name: "resolvers invalid", key: "OpenRestyResolvers", value: "dns.internal", wantErr: true},
 	}
 
 	for _, testCase := range testCases {