private async Task <InstanceDiscoveryMetadataEntry> FetchNetworkMetadataOrFallbackAsync(
RequestContext requestContext,
Uri authorityUri)
{
try
{
return(await _networkMetadataProvider.GetMetadataAsync(authorityUri, requestContext).ConfigureAwait(false));
}
catch (MsalServiceException ex)
{
if (!requestContext.ServiceBundle.Config.AuthorityInfo.ValidateAuthority)
{
requestContext.Logger.Info("[Instance Discovery] Skipping Instance discovery as validate authority is set to false.");
return(CreateEntryForSingleAuthority(authorityUri));
}
// Validate Authority exception
if (ex.ErrorCode == MsalError.InvalidInstance)
{
throw;
}
string message =
"[Instance Discovery] Instance Discovery failed. Potential cause: no network connection or discovery endpoint is busy. See exception below. MSAL will continue without network instance metadata.";
requestContext.Logger.WarningPii(message + " Authority: " + authorityUri, message);
requestContext.Logger.WarningPii(ex);
return(_knownMetadataProvider.GetMetadata(authorityUri.Host, Enumerable.Empty <string>(), requestContext.Logger));
}
}
public async Task NetworkProviderIsCalledLastAsync()
{
// Arrange
_discoveryManager = new InstanceDiscoveryManager(
_harness.HttpManager,
_harness.ServiceBundle.MatsTelemetryManager,
false,
null,
null,
_knownMetadataProvider,
_networkCacheMetadataProvider,
_networkMetadataProvider);
var otherEnvs = new[] { "env1", "env2" };
var authorityUri = new Uri(Authority);
// No response from the static and known provider
_knownMetadataProvider
.GetMetadata("some_env.com", otherEnvs, Arg.Any <ICoreLogger>())
.Returns((InstanceDiscoveryMetadataEntry)null);
_networkMetadataProvider
.GetMetadataAsync(authorityUri, _testRequestContext)
.Returns(_expectedResult);
// Act
InstanceDiscoveryMetadataEntry actualResult = await _discoveryManager.GetMetadataEntryTryAvoidNetworkAsync(
"https://some_env.com/tid",
otherEnvs,
_testRequestContext)
.ConfigureAwait(false);
// Assert
Assert.AreSame(_expectedResult, actualResult, "The known metadata provider should be queried second");
_knownMetadataProvider.Received(1).GetMetadata("some_env.com", otherEnvs, Arg.Any <ICoreLogger>());
await _networkMetadataProvider.Received(1).GetMetadataAsync(authorityUri, _testRequestContext).ConfigureAwait(false);
}