Xamarin 相当于 WebAuthenticationBroker GetCurrentApplicationCallbackUri？

Question

我正在尝试对 Xamarin Forms 应用程序进行身份验证，但找不到 Windows 命名空间 class 和方法的替代方法：WebAuthenticationBroker.GetCurrentApplicationCallbackUri.

对于 Xamarin Forms UWP 应用程序，我可以使用它来获取 RedirectURL，但我不确定如何处理 iOS 和 Android 应用程序。

    class Authenticator : IAuthenticator
{

    /// <summary>
    /// Address to return to upon receiving a response from the authority.
    /// </summary>
    private static readonly Uri RedirectURI = WebAuthenticationBroker.GetCurrentApplicationCallbackUri();


    public async Task<AuthenticationResult> AuthenticateAsync(UserLogOn user, string authority, string resource, Uri redirectURI, string clientId)
    {
        PlatformParameters platformParams = new PlatformParameters(PromptBehavior.Always, false);

        try
        {

            var authContext = new AuthenticationContext(authority);

            var authResult = await authContext.AcquireTokenAsync(resource, clientId, RedirectURI, platformParams);
            return authResult;
        }
        catch (Exception e)
        {
            Debug.WriteLine($"AquireTokenAsync Error: {e.Message}");
            return null;
        }
    }
}

谢谢，马克

Answer 1

事实证明我的 Azure AD 帐户存在权限问题，但一旦问题得到解决，这就是我最终使用的 Android 和 iOS 的解决方案：

将此重定向 URI 添加到 Azure AD 应用程序注册并将其替换为 Windows 唯一方法 GetCurrentApplicationCallbackUri 成功了。

/// <summary>
/// Redirect URI for Android and iOS.
/// </summary>
public static Uri RedirectURI = new Uri("http://AppNamespace.azurewebsites.net/local");

在这里，我在项目中使用了一个接口：

Android

class Authenticator : IAuthenticator
{
    public async Task<AuthenticationResult> AuthenticateAsync(UserLogOn user, string authority, string resource, Uri redirectURI, string clientId)
    {
        try
        {
            var authContext = new AuthenticationContext(authority);

                var authResult = await authContext.AcquireTokenAsync(resource, clientId, redirectURI, new PlatformParameters((Activity)Forms.Context));

                return authResult;
        }
        catch (Exception)
        {
            return null;
        }
    }
}

iOS

class Authenticator : IAuthenticator
{
    public async Task<AuthenticationResult> AuthenticateAsync(UserLogOn user, string authority, string resource, Uri redirectURI, string clientId)
    {
        try
        {
            var authContext = new AuthenticationContext(authority);

            var authResult = await authContext.AcquireTokenAsync(resource, clientId, redirectURI,
                new PlatformParameters(UIApplication.SharedApplication.KeyWindow.RootViewController));

            return authResult;
        }
        catch (Exception)
        {
            throw;
        }
    }
}

最后我用这一行调用接口：

var authResult = await DependencyService.Get<IAuthenticator>().AuthenticateAsync(user, QueryParameters.Authority, QueryParameters.GraphResourceUri, QueryParameters.RedirectURI, QueryParameters.ClientId);

Xamarin 相当于 WebAuthenticationBroker GetCurrentApplicationCallbackUri？

Xamarin equivalent to WebAuthenticationBroker GetCurrentApplicationCallbackUri?

c#

xamarin

adal

xamarin.forms