获取令牌时Office365 API OutlookServicesClient挂起

Question

I am following the example from here: Get started with Office 365 APIs

When my controller action executes, it hangs on the following line inside of var "new OutlookServicesClient"

var authResult = await authContext.AcquireTokenSilentAsync(
    dcr.ServiceResourceId,
    new ClientCredential(this.configuration.IdaClientID, this.configuration.IdaClientSecret),
    new UserIdentifier(userObjectId, UserIdentifierType.UniqueId));

I cannot figure out why it is hanging, especially, since AcquireTokenSilentAsync works just fine in the discovery client right before this call.

Any help is greatly appreciated.

My Controller Action Method:

[Authorize]
public async Task<ActionResult> Index()
{    
    var contacts = new List<ContactItem>();
    var signInUserId = ClaimsPrincipal.Current.FindFirst(ClaimTypes.NameIdentifier).Value;
    var userObjectId = ClaimsPrincipal.Current.FindFirst(ClaimTypesAdditions.ObjectIdentifier).Value;

    var authContext = new AuthenticationContext(this.configuration.IdaAuthority, new AdalTokenCache(signInUserId));

    try
    {
        var discClient = new DiscoveryClient(
            new Uri(this.configuration.Office365DiscoveryServiceEndpoint),
            async () =>
            {
                var authResult = await authContext.AcquireTokenSilentAsync(
                    this.configuration.Office365DiscoveryResourceID,
                    new ClientCredential(this.configuration.IdaClientID, this.configuration.IdaClientSecret),
                    new UserIdentifier(userObjectId, UserIdentifierType.UniqueId));

                return authResult.AccessToken;
            });

        var dcr = await discClient.DiscoverCapabilityAsync("Contacts");

        var exClient = new OutlookServicesClient(
            dcr.ServiceEndpointUri,
            async () =>
            {
                var authResult = await authContext.AcquireTokenSilentAsync(
                    dcr.ServiceResourceId,
                    new ClientCredential(this.configuration.IdaClientID, this.configuration.IdaClientSecret),
                    new UserIdentifier(userObjectId, UserIdentifierType.UniqueId));

                return authResult.AccessToken;
            });

        var contactsResult = await exClient.Me.Contacts.ExecuteAsync();

        do
        {
            var c = contactsResult.CurrentPage;
            contacts.AddRange(c.Select(contact => new ContactItem { FirstName = contact.GivenName }));

            contactsResult = await contactsResult.GetNextPageAsync();
        }
        while (contactsResult != null);
    }
    catch (AdalException exception)
    {
        if (exception.ErrorCode == AdalError.FailedToAcquireTokenSilently)
        {
            authContext.TokenCache.Clear();
        }
    }

    return this.View("Index", contacts);
}

Answer 1

There is a bug in version of 1.0.34 Microsoft.Office365.OutlookServices.Portable that causes a deadlock in OutlookServiceClient. Reverting to 1.0.22 seems to work.

This is documented here https://github.com/OfficeDev/O365-ASPNETMVC-Start/commit/b5652864756636a0b141c222e964aba953357e7a#diff-04c6e90faac2675aa89e2176d2eec7d8R139

And looks to be fixed in the next release as seen here https://github.com/Microsoft/Vipr/commit/aaeff5cb94204c23d7501be8fa74b0260ddc52d9