Refresh token mechanism in Blazor Server #7955

4 Answer(s)

• 

  0

  liangshiwei created 2 months ago

  Support Team Fullstack Developer

  Hi,

  After check , no meaning to implement it, because you have to refresh current page to use the refresh token to get new access token.

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• 

  0

  neethucp created 2 months ago

  Hi,

  We have this issue raised by the customer that they are getting "Unauthorized" message while they are in the middle of updating some forms and they are forced to reload the page without saving the updates they made. That is the reason that we are looking for a refresh token mechanism so that they don't get the unauthorized messages while they are actively using the application.

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• 

  0

  liangshiwei created 2 months ago

  Support Team Fullstack Developer

  Hi

  Sorry, there is no ASPNETCore official support at this time https://github.com/dotnet/aspnetcore/issues/55213

  I'll try to find a temporary solution and let you know.

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• 

  0

  liangshiwei created 2 months ago

  Support Team Fullstack Developer

  Hi,

  You can try this

  [Dependency(ReplaceServices = true)]
  [ExposeServices(typeof(IAbpAccessTokenProvider))]
  public class MyAccessTokenProvider : HttpContextAbpAccessTokenProvider
  {
      private readonly IHttpClientFactory _httpClientFactory;
      private readonly IConfiguration _configuration;
      
      public MyAccessTokenProvider(IHttpContextAccessor httpContextAccessor, IHttpClientFactory httpClientFactory, IConfiguration configuration) : base(httpContextAccessor)
      {
          _httpClientFactory = httpClientFactory;
          _configuration = configuration;
      }
  
      public override async Task<string?> GetTokenAsync()
      {
          var authenticationInfo = await HttpContextAccessor.HttpContext.AuthenticateAsync();
          
          var refreshToken = authenticationInfo.Properties?.GetTokenValue("refresh_token");
          var tokenString = authenticationInfo.Properties?.GetTokenValue("access_token");
          
          if (tokenString.IsNullOrWhiteSpace() || refreshToken.IsNullOrWhiteSpace())
          {
              return tokenString;
          }
  
          var token = new JwtSecurityTokenHandler().ReadJwtToken(tokenString);
          
          // check token expiration and refresh token if needed
          if (token.ValidTo < DateTime.UtcNow.AddMinutes(5))
          {
              var client = _httpClientFactory.CreateClient();
              
              var response = await client.RequestRefreshTokenAsync(new RefreshTokenRequest
              {
                  ClientId = _configuration["AuthServer:ClientId"]!,
                  ClientSecret = _configuration["AuthServer:ClientSecret"]!,
                  RefreshToken = refreshToken,
                  Address = _configuration["AuthServer:Authority"]!.EnsureEndsWith('/') + "connect/token"
              });
                         
              
              authenticationInfo.Properties.UpdateTokenValue(
                  "access_token", response.AccessToken);
              authenticationInfo.Properties.UpdateTokenValue(
                  "refresh_token", response.RefreshToken);
  
              return response.AccessToken;
          }
          
          return tokenString;
          
      }
  }
  

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