Refactor route handling to use ConcurrentDictionary for thread-safe updates and optimize /goto/{path} logic

VirtualDDNSRouter.Server/Program.cs

@@ -1,3 +1,4 @@
+using System.Collections.Concurrent;
 using Microsoft.AspNetCore.HttpOverrides;
 using VirtualDDNSRouter.Server.Interfaces;
 using VirtualDDNSRouter.Server.Services;
@@ -21,7 +22,7 @@ app.UseForwardedHeaders(new ForwardedHeadersOptions
 
 if (app.Environment.IsDevelopment()) app.MapOpenApi();
 
-var routes = new List<Route>();
+var routes = new ConcurrentDictionary<string, Route>();
 
 app.MapGet("/setip/{path}/{port}/{apiKey}",
     async (IYamlParser yamlParser, HttpContext context, string path, ushort port, string apiKey) =>
@@ -42,24 +43,20 @@ app.MapGet("/setip/{path}/{port}/{apiKey}",
             return Results.BadRequest("Could not get the client ip address");
         }
 
-        var existingRoute = routes.FirstOrDefault(r => r.path == path);
+        routes[path] = new Route
-        if (existingRoute is not null) routes.Remove(existingRoute);
-
-        routes.Add(new Route
         {
             ipAddress = clientIp,
             path = path,
             port = port
-        });
+        };
 
         return Results.Ok($"goto/{path}");
     });
 
 app.MapGet("/goto/{path}", (string path) =>
 {
-    var redirectRoute = routes.FirstOrDefault(r => r.path == path);
+    if (routes.TryGetValue(path, out var route)) return Results.Redirect($"http://{route.ipAddress}:{route.port}");
-    if (redirectRoute is null) return Task.FromResult(Results.NotFound());
+    return Results.NotFound();
-    return Task.FromResult(Results.Redirect($"http://{redirectRoute.ipAddress}:{redirectRoute.port}"));
 });
 
 app.Run();