LCEngineRequestContext.CurrentUser取不到登入後的User

[ktchou]

我這邊已經在OnLogin的地方Log確認我client端已正確登入
但我對伺服器進行Request的時候卻無法在伺服器端獲取到已經登入的User

[ktchou]

概念如圖 我這樣取 但會報錯

[ktchou]

user MiniPlayer1 has logined是OnLogin hook的地方
然後接下來
RPC那邊就爆錯了

[ktchou]

爆錯大概長這樣

[ktchou]

想問說我呼叫RPC有需要帶什麼額外的驗證參數還什麼的嗎？ 就是server那邊要怎麼知道我這次的呼叫是在有登入的狀況下呼叫的

[weakish]

按說 client 端已經登入的情況下，client 端的 RPC Call 會在 HTTP Header 裏帶上 session token 信息 X-LC-Session

麻煩開一下調試日誌，然後把 client 端 RPC Call 的相關程式碼，以及相應的包含詳細網絡請求信息的日誌貼一下（注意，如果不是測試用戶，請注意隱去相關敏感信息）。

```
程式碼和日誌可以用三個反引號包起來，這樣既便於拷貝，也可以保留縮進
```

[ktchou]

Editor.log.zip (61.2 KB)
這是log 大概從11256行看到12126行差不多是一個登入後嘗試修改姓名的流程 最後修改上傳姓名資料後因為抓不到登入的使用者就爆錯了

[ktchou]

這是改姓名的函式

public async Task<bool> UpdateUserDataAsync(
            string email,
            string playerName)
        {
            try
            {
                var result = await LCUtil.CallRPC(LCConstants.EP_UpdateUserData, new Dictionary<string, object>()
                {
                    { LCConstants.Field_email, email },
                    { LCConstants.Field_playerName, playerName }
                });

                return (bool)result;
        }
        catch (Exception e)
        {
            Debug.Log(e.ToString());
        }

        return false;
    }

RPC的部分大家都是共用一個Util class所提供的靜態函式

public static async Task<object> CallRPC(string rpcName, object param)
        {
            try
            {
                return await LCCloud.RPC(rpcName, param);
            }
            catch (Exception e)
            {
                Debug.Log(e.ToString());
            }

            return null;
    }

[ktchou]

如果有需要server端的日誌或程式碼再跟我說

[weakish]

主要相關日誌是這些：

[DEBUG] 9/28/2021 12:07:31 PM === HTTP Request Start ===
URL: https://bqy5mmps.api.lncldglobal.com/1.1/call/UpdateUserData
Method: POST
Headers: 
	User-Agent: LeanCloud-CSharp-SDK/0.9.9
	Accept: application/json
	X-LC-Id: BQY5mmps9mmDsEjbRvaGJbOP-MdYXbMMI
	X-LC-Prod: 1
	X-LC-Sign: 略
	X-LC-Session: 略
	Content-Type: application/json
Content: {"email":"","playerName":"www"}
=== HTTP Request End ===

[DEBUG] 9/28/2021 12:07:31 PM === HTTP Response Start ===
URL: https://bqy5mmps.api.lncldglobal.com/1.1/call/UpdateUserData
Status Code: InternalServerError
Content: "The given key '__currentUser' was not present in the dictionary."
=== HTTP Response End ===

從日誌看客戶端已經發了 X-LC-Session，照理 Server 端（雲引擎）不會找不到用戶。方便把雲引擎上 UpdateUserData 這個雲函數的定義也貼一下麼？

[ktchou]

[LCEngineFunction(LCConstants.EP_UpdateUserData)]
        public static async Task<bool> UpdateUserData(
            [LCEngineFunctionParam(LCConstants.Field_email)] string email,
            [LCEngineFunctionParam(LCConstants.Field_playerName)] string playerName)
        {

            var curUser = LCEngineRequestContext.CurrentUser;
            if (!string.IsNullOrEmpty(email)) curUser.Email = email;
            if (!string.IsNullOrEmpty(playerName)) await curUser.SetPlayerName(playerName);
            await curUser.Save();
            return true;
        }

UpdateUserData長這樣

[ktchou]

User Hook只有用一個 OnLogin

[LCEngineUserHook(LCEngineUserHookType.OnLogin)]
        public static LCUser OnLogin(LCUser user) {
            if ((int)user[LCConstants.Field_userType] == LCConstants.forbiddenUserType)
            {
                LCErrorUtil.LookUpException(LCError.UserForbidden, "user type invalid");
            }
            Debug.Log(string.Format("user {0} has logined",user.Username));
            return user;
        }

[ktchou]

StartUp長這樣

public class Startup {
        public Startup(IConfiguration configuration) {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services) {
        LCLogger.LogDelegate = (level, log) => {
            switch (level) {
                case LCLogLevel.Debug:
                    Debug.Log($"[DEBUG] {log}");
                    break;
                case LCLogLevel.Warn:
                    Debug.Log($"[WARN] {log}");
                    break;
                case LCLogLevel.Error:
                    Debug.Log($"[ERROR] {log}");
                    break;
                default:
                    break;
            }
        };

        //Environment.SetEnvironmentVariable(LCServerEnv.envMasterKey,LCServerEnv.masterKey);
        LCEngine.Initialize(services);
        LCApplication.UseMasterKey = true;

        services.AddHealthChecks();
        services.AddControllersWithViews();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env) {
        if (env.IsDevelopment()) {
            app.UseDeveloperExceptionPage();
        } else {
            app.UseExceptionHandler("/Home/Error");
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }
        app.UseHttpsRedirection();
        app.UseStaticFiles();

        app.UseHealthChecks("/ping");
        
        app.UseRouting();

        app.UseCors();

        app.UseAuthorization();

        app.UseEndpoints(endpoints => {
            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller=Home}/{action=Index}/{id?}");
        });
        
        App.Init();
    }
}

[ktchou]

Program長這樣

public class Program {
        public static void Main(string[] args) {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder => {
                webBuilder.UseStartup<Startup>();
            });
}

[ktchou]

我的註冊是客製化在server的一個endpoint 這有關係嗎？

[LCEngineFunction(LCConstants.EP_UserRegister)]
        public static async Task<bool> Register(
            [LCEngineFunctionParam(LCConstants.Field_playerName)] string playerName,
            [LCEngineFunctionParam(LCConstants.Field_username)] string username,
            [LCEngineFunctionParam(LCConstants.Field_userPassword)] string password)
        {
            try
            {
                LCUser user = new LCUser();
                user.Username = username;
                user.Password = password;
                
                await user.GenInitDataRecords(App.Container)
                    .SetUserType(LCConstants.defaultUserType)
                    .SetPlayerName(playerName);
                    
                await user.Save();
                return true;
            }
            catch (Exception e)
            {
                Debug.Log(e.ToString());
                throw LCErrorUtil.LookUpException(LCError.UserRegisterFailed, e.ToString());
            }

            return false;
    }

[weakish]

LCEngineRequestContext.CurrentUser

這樣可能取不到當前用戶。

建議換一種寫法：

可以從 LCEngineRequestContext.SessionToken 拿到 token 後，再調用 LCUser.BecomeWithSessionToken 得到相應的用戶，參見 文檔。

至於 LCEngineRequestContext.CurrentUser 取不到用戶是有意這麼設計還是接口實現不太完善，十一長假後會找負責 C# SDK 開發的工程師問下，感謝反饋問題。

[ktchou]

LCEngineRequestContext.SessionToken

了解 看起來沒問題了 感謝解答

[zyu]

当请求中没有 LCUser 对象时，LCEngineRequestContext.CurrentUser 确实是返回 null。
原因是在于**不确定用户是否需要 CurrentUser 时，就选择不拉取 CurrentUser，目的是为了减少不必要的请求。**
如果需要 CurrentUser，可以通过 LCEngineRequestContext.SessionToken 自行拉取。