sing-box prioritizes the use of local srs

v2rayN/v2rayN/Handler/CoreConfig/CoreConfigSingbox.cs

@@ -1,4 +1,5 @@
 using System.Data;
+using System.IO;
 using System.Net;
 using System.Net.NetworkInformation;
 using v2rayN.Enums;
@@ -966,28 +967,42 @@ namespace v2rayN.Handler.CoreConfig
                 }
             }
 
+            //Local srs files address
+            var localSrss = Utils.GetBinPath("srss");
+
             //Add ruleset srs
             singboxConfig.route.rule_set = [];
             foreach (var item in new HashSet<string>(ruleSets))
             {
                 if (Utils.IsNullOrEmpty(item)) { continue; }
                 var customRuleset = customRulesets.FirstOrDefault(t => t.tag != null && t.tag.Equals(item));
-                if (customRuleset != null)
+                if (customRuleset is null)
                 {
-                    singboxConfig.route.rule_set.Add(customRuleset);
+                    var pathSrs = Path.Combine(localSrss, $"{item}.srs");
+                    if (File.Exists(pathSrs))
+                    {
+                        customRuleset = new()
+                        {
+                            type = "local",
+                            format = "binary",
+                            tag = item,
+                            path = pathSrs
+                        };
                     }
                     else
                     {
-                    singboxConfig.route.rule_set.Add(new()
+                        customRuleset = new()
                         {
                             type = "remote",
                             format = "binary",
                             tag = item,
                             url = string.Format(Global.SingboxRulesetUrl, item.StartsWith(geosite) ? geosite : geoip, item),
                             download_detour = Global.ProxyTag
-                    });
+                        };
                     }
                 }
+                singboxConfig.route.rule_set.Add(customRuleset);
+            }
 
             return 0;
         }