GetExternalLoginInfoAsync 返回 null dotnet core 2.0 [英] GetExternalLoginInfoAsync returns null dotnet core 2.0

问题描述

我正在尝试使用 dot-net core 2.0 设置 Facebook 身份验证，但是在我的 ExternalLoginCallbackAsync 方法中，我总是得到 null 作为响应我已经按照文档进行操作，到目前为止，这就是我所做的:

I'm trying to setup Facebook authentication with dot-net core 2.0, but in my ExternalLoginCallbackAsync method, I'm always getting null as a response I have followed the documentation and so far this is what I've done:

在我的启动文件中的ConfigureServices中:

in my ConfigureServices in the startup file:

services.AddAuthentication(
            options => options.DefaultAuthenticateScheme = CookieAuthenticationDefaults.AuthenticationScheme);

services.AddAuthentication().AddFacebook(
    f => {
        f.AppId = Configuration["facebook-app-id"];
        f.AppSecret = Configuration["facebook-app-secret"];
});

在我的登录控制器中:

public IActionResult ExternalLogin(string provider)
        {

            var authProperties = new AuthenticationProperties
            {
                RedirectUri = Url.Action("ExternalLoginCallbackAsync", "Login")                
            };
            return Challenge(authProperties,provider);
        }

在我的 ExternalLoginCallbackAsync 方法中当我这样做

in my ExternalLoginCallbackAsync method when I do

var info = await _signInManager.GetExternalLoginInfoAsync();

任何提示为什么我总是为空?

any hint why am I always getting null?

谢谢

推荐答案

我按照 Lasse Vabe Rolstad 的建议查看了 SignInManager 代码，对我来说，auth 属性中缺少一个键，因此我不得不像这样手动添加它:

I looked at the SignInManager code as Lasse Vabe Rolstad suggested and for me, a key was missing in the auth properties so I had to add it manually like this:

 var authProperties = new AuthenticationProperties
 {
     RedirectUri = Url.Action("ExternalLoginCallbackAsync", "Login"),
     Items = { new KeyValuePair<string, string>("LoginProvider",provider) }
 };

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