feat : 토큰 인증 RestApi 구현 / Token기반 haskKey구현 / Dummy, User Token체크 분기

MMOTestServer/MMOserver/Api/RestApi.cs

@@ -0,0 +1,48 @@
+using System.Net;
+using System.Net.Http.Json;
+using System.Text.Json.Serialization;
+using MMOserver.Utils;
+using Serilog;
+
+namespace MMOserver.Api;
+
+public class RestApi : Singleton<RestApi>
+{
+    private const string VERIFY_URL = "https://a301.api.tolelom.xyz/api/auth/verify";
+    private readonly HttpClient httpClient = new HttpClient { Timeout = TimeSpan.FromSeconds(5) };
+
+    // 토큰 검증 - 성공 시 username 반환, 실패(401/타임아웃 등) 시 null 반환
+    public async Task<string?> VerifyTokenAsync(string token)
+    {
+        try
+        {
+            HttpResponseMessage response = await httpClient.PostAsJsonAsync(VERIFY_URL, new { token });
+
+            if (response.StatusCode == HttpStatusCode.Unauthorized)
+            {
+                Log.Warning("[RestApi] 인증 실패 (401)");
+                return null;
+            }
+
+            response.EnsureSuccessStatusCode();
+
+            AuthVerifyResponse? result = await response.Content.ReadFromJsonAsync<AuthVerifyResponse>();
+            return result?.Username;
+        }
+        catch (Exception ex)
+        {
+            Log.Error("[RestApi] 웹서버 통신 실패: {Message}", ex.Message);
+            return null;
+        }
+    }
+
+    private sealed class AuthVerifyResponse
+    {
+        [JsonPropertyName("username")]
+        public string? Username
+        {
+            get;
+            set;
+        }
+    }
+}