public static async Task <string> GetTokenEndpointAsync(this TokenHandlerOptions options, HttpClient authorityHttpClient)
{
if (options.TokenEndpoint.IsPresent())
{
return(options.TokenEndpoint);
}
var endpoint = await authorityHttpClient.GetTokenEndpointFromDiscoveryDocument(options).ConfigureAwait(false);
return(endpoint);
}
public static async Task <string> GetTokenEndpointFromDiscoveryDocument(this HttpClient authorityHttpClient, TokenHandlerOptions options)
{
var discoveryRequest = new DiscoveryDocumentRequest
{
Address = options.Authority,
Policy = options.DiscoveryPolicy,
};
var discoveryResponse = await authorityHttpClient.GetDiscoveryDocumentAsync(discoveryRequest).ConfigureAwait(false);
if (discoveryResponse.IsError)
{
if (discoveryResponse.ErrorType == ResponseErrorType.Http)
{
throw new InvalidOperationException($"Discovery endpoint {discoveryRequest.Address} is unavailable: {discoveryResponse.Error}");
}
if (discoveryResponse.ErrorType == ResponseErrorType.PolicyViolation)
{
throw new InvalidOperationException($"Policy error while contacting the discovery endpoint {discoveryRequest.Address}: {discoveryResponse.Error}");
}
if (discoveryResponse.ErrorType == ResponseErrorType.Exception)
{
throw new InvalidOperationException($"Error parsing discovery document from {discoveryRequest.Address}: {discoveryResponse.Error}");
}
}
return(discoveryResponse.TokenEndpoint);
}
