private async Task <InstanceDiscoveryResponse> SendInstanceDiscoveryRequestAsync(
Uri authority,
RequestContext requestContext)
{
var client = new OAuth2Client(requestContext.Logger, _httpManager, _telemetryManager);
client.AddQueryParameter("api-version", "1.1");
client.AddQueryParameter("authorization_endpoint", BuildAuthorizeEndpoint(authority.Host, GetTenant(authority)));
string discoveryHost = KnownMetadataProvider.IsKnownEnvironment(authority.Host) ?
authority.Host :
AadAuthority.DefaultTrustedHost;
string instanceDiscoveryEndpoint = BuildInstanceDiscoveryEndpoint(discoveryHost);
InstanceDiscoveryResponse discoveryResponse = await client
.DiscoverAadInstanceAsync(new Uri(instanceDiscoveryEndpoint), requestContext)
.ConfigureAwait(false);
return(discoveryResponse);
}
private Uri ComputeHttpEndpoint(Uri authority, RequestContext requestContext)
{
if (_userProvidedInstanceDiscoveryUri != null)
{
return(_userProvidedInstanceDiscoveryUri);
}
string discoveryHost = KnownMetadataProvider.IsKnownEnvironment(authority.Host) ?
authority.Host :
AadAuthority.DefaultTrustedHost;
string instanceDiscoveryEndpoint = UriBuilderExtensions.GetHttpsUriWithOptionalPort(
string.Format(
CultureInfo.InvariantCulture,
"https://{0}/common/discovery/instance",
discoveryHost),
authority.Port);
requestContext.Logger.InfoPii(
$"Fetching instance discovery from the network from host {discoveryHost}. Endpoint {instanceDiscoveryEndpoint}",
$"Fetching instance discovery from the network from host {discoveryHost}");
return(new Uri(instanceDiscoveryEndpoint));
}