I am trying to override, ValidateAllowedCorsOriginsAsync, to handle iOS origin, but not sure how to hook the derived class to IdentityServer4 to use it. Is there an example or can you provide a link for instruction

[hubaozhang2017]

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[hubaozhang2017]

I figured out the problem. Here are steps: (1) Create a class, CustomClientConfigurationValidator, and override ValidateAllowedCorsOriginsAsync `

      public class CustomClientConfigurationValidator : DefaultClientConfigurationValidator

{

    readonly IConfiguration _configuration;

    public CustomClientConfigurationValidator(IConfiguration configuration)
        :base()

    {

        _configuration = configuration;

    }

    protected override Task ValidateAllowedCorsOriginsAsync(ClientConfigurationValidationContext context)

    {}

  }`

(2) Add AddClientConfigurationValidator to services `
var identityServerBuilder = services.AddIdentityServer()

            .AddSigningCredential(new X509Certificate2(certPath, "", X509KeyStorageFlags.MachineKeySet))

            .AddClientConfigurationValidator<CustomClientConfigurationValidator>()

         ;`

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