AccessToken and RefreshToken null #6327

1 Answer(s)

• 

  0

  liangshiwei created 2 years ago

  Fullstack Developer

  Hi,

  When you log in successfully, it will set accesstoken and refreshtoken.

  public class LoginService : ILoginService, ITransientDependency
  {
      private readonly OidcClient _oidcClient;
      private readonly IStorage _storage;
      private readonly MauiCachedApplicationConfigurationClient _applicationConfigurationClient;
  
      public LoginService(OidcClient oidcClient, IStorage storage, MauiCachedApplicationConfigurationClient applicationConfigurationClient)
      {
          _oidcClient = oidcClient;
          _storage = storage;
          _applicationConfigurationClient = applicationConfigurationClient;
      }
  
      public async Task<LoginResult> LoginAsync()
      {
          var loginResult = await _oidcClient.LoginAsync(new LoginRequest());
  
          if (!loginResult.IsError)
          {
              await SetTokenCacheAsync(loginResult.AccessToken, loginResult.RefreshToken);
              await _applicationConfigurationClient.InitializeAsync();
  
              WeakReferenceMessenger.Default.Send(new LoginMessage());
          }
  
          return loginResult;
      }
  
      public async Task<LogoutResult> LogoutAsync()
      {
          var logoutResult = await _oidcClient.LogoutAsync();
          if (!logoutResult.IsError)
          {
              await ClearTokenCacheAsync();
              await _applicationConfigurationClient.InitializeAsync();
  
              WeakReferenceMessenger.Default.Send(new LogoutMessage());
          }
  
          return logoutResult;
      }
  
      public async Task<string> GetAccessTokenAsync()
      {
          var token = await _storage.GetAsync(MyProjectNameConsts.OidcConsts.AccessTokenKeyName);
  
          if (!token.IsNullOrEmpty())
          {
              var jwtToken = new JwtSecurityTokenHandler().ReadJwtToken(token);
              if (jwtToken.ValidTo <= DateTime.UtcNow)
              {
                  var newToken = await TryRefreshTokenAsync();
  
                  if (!newToken.IsNullOrEmpty())
                  {
                      return newToken;
                  }
  
                  await ClearTokenCacheAsync();
                  WeakReferenceMessenger.Default.Send(new LogoutMessage());
              }
          }
  
          return token;
      }
  
      public async Task<string> TryRefreshTokenAsync()
      {
          var refreshToken = await _storage.GetAsync(MyProjectNameConsts.OidcConsts.RefreshTokenKeyName);
          if (!refreshToken.IsNullOrEmpty())
          {
              var refreshResult = await _oidcClient.RefreshTokenAsync(refreshToken);
              await SetTokenCacheAsync(refreshResult.AccessToken, refreshResult.RefreshToken);
  
              return refreshResult.AccessToken;
          }
  
          return string.Empty;
      }
  
      private async Task SetTokenCacheAsync(string accessToken, string refreshToken)
      {
          await _storage.SetAsync(MyProjectNameConsts.OidcConsts.AccessTokenKeyName, accessToken);
          await _storage.SetAsync(MyProjectNameConsts.OidcConsts.RefreshTokenKeyName, refreshToken);
      }
  
      private async Task ClearTokenCacheAsync()
      {
          await _storage.RemoveAsync(MyProjectNameConsts.OidcConsts.AccessTokenKeyName);
          await _storage.RemoveAsync(MyProjectNameConsts.OidcConsts.RefreshTokenKeyName);
      }
  }
  

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