Either the request URI must be an absolute URI or BaseAddress must be set.

[senzacionale]

When I want to open admin page I am getting this error Either the request URI must be an absolute URI or BaseAddress must be set.

An unhandled exception occurred while processing the request. InvalidOperationException: An invalid request URI was provided. Either the request URI must be an absolute URI or BaseAddress must be set. System.Net.Http.HttpClient.PrepareRequestMessage(HttpRequestMessage request)

AuthenticationFailureException: An error was encountered while handling the remote login. Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler.HandleRequestAsync()

Do we need to set BaseAddress somewhere?

[sipsorcery]

I'm currently updating my asp.net mvc app, that uses the duende identity server for authentication, to dotnet 8 and am getting this error as well. It worked fine when the asp.net mvc app was dotnet 7 and the identity server app was dotnet 8. It's when they are both dotnet 8 I get the problem.

It seems to be something to do with the tokenendpoint. In the snippet below it's always empty even though the rest of the openid url's seem to be getting correctly extracted from the identity server metadata:

OnAuthorizationCodeReceived = context =>
 {
     var logger = context.HttpContext.RequestServices.GetRequiredService<ILogger<Startup>>();

     logger.LogInformation("OnAuthorizationCodeReceived: Authorization code received.");
     logger.LogInformation($"Token Endpoint: {context.TokenEndpointRequest.AuthorizationEndpoint}");
     logger.LogInformation($"Redirect Uri: {context.TokenEndpointRequest.RedirectUri}");

     // Check if the token endpoint request is properly configured
     var tokenEndpointRequest = context.TokenEndpointRequest;
     if (tokenEndpointRequest == null)
     {
         logger.LogError("TokenEndpointRequest is null.");
     }
     else
     {
         logger.LogInformation($"TokenEndpointRequest: {tokenEndpointRequest}");
         logger.LogInformation($"ClientId: {tokenEndpointRequest.ClientId}");
         logger.LogInformation($"ClientSecret: {tokenEndpointRequest.ClientSecret}");
         logger.LogInformation($"Code: {tokenEndpointRequest.Code}");
         logger.LogInformation($"RedirectUri: {tokenEndpointRequest.RedirectUri}");
     }

     return Task.CompletedTask;
 },

Logs:

[23:41:52 INF] OnAuthorizationCodeReceived: Authorization code received.
[23:41:52 INF] Token Endpoint:
[23:41:52 INF] Redirect Uri: https://localhost:5001/signin-oidc
[23:41:52 INF] TokenEndpointRequest: Microsoft.IdentityModel.Protocols.OpenIdConnect.OpenIdConnectMessage
[23:41:52 INF] ClientId: <snip>
[23:41:52 INF] ClientSecret: <snip>
[23:41:52 INF] Code: <snip>
[23:41:52 INF] RedirectUri: https://localhost:5001/signin-oidc
[23:41:52 DBG] Redeeming code for tokens.
[23:41:52 ERR] Exception occurred while processing message.
System.InvalidOperationException: An invalid request URI was provided. Either the request URI must be an absolute URI or BaseAddress must be set.
   at System.Net.Http.HttpClient.PrepareRequestMessage(HttpRequestMessage request)
   at System.Net.Http.HttpClient.SendAsync(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectHandler.RedeemAuthorizationCodeAsync(OpenIdConnectMessage tokenEndpointRequest)
   at Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectHandler.HandleRemoteAuthenticateAsync()

[senzacionale]

Please check this https://github.com/DuendeSoftware/Support/issues/1221

Solve my problem.