ExternalLoginInfo 电子邮件在 Microsoft 和 Facebook oauth2、MVC C# 中始终为 null?

ExternalLoginInfo Email is always null in Microsoft and Facebook oauth2, MVC C#?

我正在为 ExternalLoginCallback
使用以下代码 google 一切正常。但在 FacebookMicrosoftloginInfo.Email 始终为空。 以下代码有什么问题?

    [AllowAnonymous]
public async Task<ActionResult> ExternalLoginCallback(string returnUrl)
{
    ExternalLoginInfo loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
    if (loginInfo == null)
    {
        return RedirectToAction("Login");
    }

    // loginInfo.Email is always null, so FindByEmailAsync throws an exception
    UserIdentityModel user = await UserManager.FindByEmailAsync(loginInfo.Email); 

    if (user != null)
    {
        await SignInAsync(user, false);
        return RedirectToLocal(returnUrl);
    }

    // If the user does not have an account, then prompt the user to create an account
    ViewBag.ReturnUrl = returnUrl;
    ViewBag.LoginProvider = loginInfo.Login.LoginProvider;
    return View("ExternalLoginConfirmation", new ExternalLoginConfirmationViewModel
    {
        UserName = loginInfo.DefaultUserName,
        Email = loginInfo.Email
    });
}

我正在使用以下软件包:

<package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Cookies" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Facebook" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Google" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.MicrosoftAccount" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.OAuth" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Twitter" version="3.0.1" targetFramework="net45" />

我找到了解决方案,我们必须在 Startup.Auth.cs 文件中使用 FacebookMicrosoft 如下:

// Facebook
app.UseFacebookAuthentication(new FacebookAuthenticationOptions
{
    AppId = "---",
    AppSecret = "---",
    Scope = { "email" }
});

// Microsoft
app.UseMicrosoftAccountAuthentication(new MicrosoftAccountAuthenticationOptions()
{
    ClientId = "---",
    ClientSecret = "---",
    Scope = { "wl.basic", "wl.emails" }
});
app.UseFacebookAuthentication(new FacebookAuthenticationOptions
            {
                AppId = "",
                AppSecret = "",
                BackchannelHttpHandler = new FacebookBackChannelHandler(),
                UserInformationEndpoint = "https://graph.facebook.com/v2.4/me?fields=id,name,email,first_name,last_name,location",
                Scope = { "email" }
            });

创建 class :

 public class FacebookBackChannelHandler : HttpClientHandler
    {
        protected override async System.Threading.Tasks.Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
        {
            // Replace the RequestUri so it's not malformed
            if (!request.RequestUri.AbsolutePath.Contains("/oauth"))
            {
                request.RequestUri = new Uri(request.RequestUri.AbsoluteUri.Replace("?access_token", "&access_token"));
            }

            return await base.SendAsync(request, cancellationToken);
        }
    }

适合我。

我试过穆罕默德的回答。没有骰子。 我尝试了 Bimal 的回答。没有骰子。

最后,我使用 Nuget 升级了所有 OWIN 引用。现在可以了。

如果其他答案不起作用,请尝试根据所有 OWIN 项目升级所有 Nuget 包。

我对 Microsoft 帐户也有同样的问题,但只是那些与个人帐户(即 hotmail)相关联的问题,而不是 business/school 帐户。在尝试了上面的几个答案后,尽管用户授予了我的应用程序权限,但我仍然没有收到电子邮件地址。

最后,为我解决这个问题的是将我项目中的 OWIN 包更新到 4.0 版。之后,一切正常。