c# - Azure Active Directory 获取所有用户 - (可能死锁)

Question

我在 Azure Active Directory 中有 150 个用户，我通过以下方式获取他们:

    public List<Generic.UserAAD> GetUsersAAD()
    {
        ActiveDirectoryClient activeDirectoryClient = AuthenticationHelper.GetActiveDirectoryClientAsApplication();

        IPagedCollection<IUser> usersA = activeDirectoryClient.Users.ExecuteAsync().Result;
        List<IUser> queryUsers = new List<IUser>();
        List<Generic.UserAAD> listUsers = new List<Generic.UserAAD>();

        do
        {
            List<IUser> queryUsersList = usersA.CurrentPage.ToList();
            queryUsers.AddRange(queryUsersList);
            usersA = usersA.MorePagesAvailable ? usersA = usersA.GetNextPageAsync().Result : null;
        } while (usersA != null);

        if (queryUsers.Count > 0)
        {
            listUsers = queryUsers.Select(u => new Generic.UserAAD { DName = u.DisplayName, UName= u.UserPrincipalName }).ToList();
        }

        return listUsers;
    }

这是 AuthenticationHelper 类:

public class AuthenticationHelper
{
    public static async Task<string> AcquireTokenAsyncForApplication()
    {
        return await GetTokenForApplication().ConfigureAwait(false);
    }


    public static ActiveDirectoryClient GetActiveDirectoryClientAsApplication()
    {
        Uri servicePointUri = new Uri(Constantes.graphUrl);
        Uri serviceRoot = new Uri(servicePointUri, Constantes.tenantId);
        ActiveDirectoryClient activeDirectoryClient = new ActiveDirectoryClient(serviceRoot,
            async () => await AcquireTokenAsyncForApplication().ConfigureAwait(false));
        return activeDirectoryClient;
    }


    public static async Task<string> GetTokenForApplication()
    {
        AuthenticationContext authContext = new AuthenticationContext(Constantes.authority, false);
        ClientCredential clientCred = new ClientCredential(Constantes.clientId, Constantes.appKey);
        AuthenticationResult authenticationResult = authContext.AcquireTokenAsync(Constantes.graphUrl,
                      clientCred).Result;
        var token = authenticationResult.AccessToken;
        return token;
    }
}

所以问题是它在本地工作得很好，但是在将其部署到 Azure Web App 上并执行调用 GetUsersAAD() 方法的服务后，它不起作用，http 请求卡住，几分钟后我收到 500 错误超时。

这是一个基于 AspNet MVC 的 WebApi2 项目。

所以我真的很感谢您能给我的任何帮助，谢谢。

Answer 1

好吧，经过大量阅读和搜索后，我能够使其工作，似乎 .Result 它很容易出现死锁，并且不建议在异步方法上使用，我也没有充分利用async/await/task调用，所以我让它工作的方式是:

public async Task<List<Generic.UserAAD>> GetUsersAAD()
{
    ActiveDirectoryClient activeDirectoryClient = AuthenticationHelper.GetActiveDirectoryClientAsApplication();

    Task<IPagedCollection<IUser>> usersTask = activeDirectoryClient.Users.ExecuteAsync();
    IPagedCollection<IUser> usersA = await usersTask;
    List<IUser> queryUsers = new List<IUser>();
    List<Generic.UserAAD> listUsers = new List<Generic.UserAAD>();

    do
    {
        List<IUser> queryUsersList = usersA.CurrentPage.ToList();
        queryUsers.AddRange(queryUsersList);
        usersA = usersA.MorePagesAvailable ? await usersA.GetNextPageAsync() : null;
    } while (usersA != null);

    if (queryUsers.Count > 0)
    {
        listUsers = queryUsers.Select(u => new Generic.UserAAD { DName = u.DisplayName, UName= u.UserPrincipalName }).ToList();
    }

    return listUsers;
}

我必须将方法调整为异步任务及其调用。