c# - 如何同步等待 'AuthenticationContext.AcquireTokenAsync()'？

Question

首先，我不确定这是否重要，但由于@Simon Mourier 在 him answer 中提到的原因，我正在使用 ADAL 的实验版本， this one .

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在下面的代码中，我想同步获取一个AuthenticationResult，所以，我将以同步方式等待AcquireTokenAsync方法完成身份验证。

这是因为在授权完成后应该设置一个 bool 标志 (isAuthorized = true)，但是 tgis 需要以同步方式发生，因为如果没有，那么我可以调用其他方法将抛出空引用的类，因为对 AcquireTokenAsync 的调用未完成，因此该对象为空。

下面的代码不起作用，该方法永远不会返回，因为对 AcquireTokenAsync 方法的调用似乎无限期地卡住了线程。

C#(可能由于在线翻译语法错误):

public void Authorize() {
    // Use the 'Microsoft.Experimental.IdentityModel.Clients.ActiveDirectory' Nuget package for auth.
    this.authContext = new AuthenticationContext(this.authUrl, this.cache);
    this.authResult = this.authContext.AcquireTokenAsync({ "https://outlook.office.com/mail.readwrite" }, 
                                                         null, this.clientIdB, this.redirectUriB, 
                                                         new PlatformParameters(PromptBehavior.Auto, this.windowHandleB)).Result;

    // Use the 'Microsoft.Office365.OutlookServices-V2.0' Nuget package from now on.
    this.client = new OutlookServicesClient(new Uri("https://outlook.office.com/api/v2.0"), () => Task.FromResult(this.authResult.Token));
    this.isAuthorizedB = true;
}

VB.NET:

Public Sub Authorize()

    ' Use the 'Microsoft.Experimental.IdentityModel.Clients.ActiveDirectory' Nuget package for auth.
    Me.authContext = New AuthenticationContext(Me.authUrl, Me.cache)

    Me.authResult =
        Me.authContext.AcquireTokenAsync({"https://outlook.office.com/mail.readwrite"}, 
                                         Nothing, Me.clientIdB, Me.redirectUriB,
                                         New PlatformParameters(PromptBehavior.Auto, Me.windowHandleB)).Result

    ' Use the 'Microsoft.Office365.OutlookServices-V2.0' Nuget package from now on.
    Me.client = New OutlookServicesClient(New Uri("https://outlook.office.com/api/v2.0"),
                                           Function() Task.FromResult(Me.authResult.Token))

    Me.isAuthorizedB = True

End Sub

我做了一些研究，并尝试了其他两种选择，但还是一样..

第一:

ConfiguredTaskAwaitable<AuthenticationResult> t = this.authContext.AcquireTokenAsync(scopeUrls.ToArray(), null, this.clientIdB, this.redirectUriB, new PlatformParameters(PromptBehavior.Auto, this.windowHandleB)).ConfigureAwait(false);

this.authResult = t.GetAwaiter.GetResult();

第二个:

this.authResult == RunSync(() => { return this.authContext.AcquireTokenAsync(scopeUrls.ToArray(), null, this.clientIdB, this.redirectUriB, new PlatformParameters(PromptBehavior.Auto, this.windowHandleB)); })

private AuthenticationResult RunSync<AuthenticationResult>(Func<Task<AuthenticationResult>> func)
{
    return Task.Run(func).Result;
}

Answer 1

How to wait for 'AuthenticationContext.AcquireTokenAsync()' synchronouslly?

我怀疑这个问题是由于在 UI 线程中调用异步方法引起的。目前，我的解决方法是将调用封装到一个新的工作线程中。

    private void button1_Click(object sender, EventArgs e)
    {
        Authorize().Wait();
    }

    private Task Authorize()
    {
        return Task.Run(async () => {
            var authContext = new AuthenticationContext("https://login.microsoftonline.com/common");

            var authResult = await authContext.AcquireTokenAsync
            (new string[] { "https://outlook.office.com/mail.readwrite" },
             null,
             "{client_id}",
             new Uri("urn:ietf:wg:oauth:2.0:oob"),
             new PlatformParameters(PromptBehavior.Auto, null));
        });
    }