的Web API令牌認證拋出異常，無認證處理程序被配置爲處理方案：Microsoft.AspNet.Identity.Application

Question

我已經按照下面的帖子 Token Based Authentication in ASP.NET Core

提到的解決方案來實現令牌認證使用ASP.Net核心Web API

爲了實現認證邏輯，我已經定義下面的方法

public async Task<bool> AuthenticateUser(string email, string password) 
{ 
    UserManager<ApplicationUser> _userManager = HttpContext.ApplicationServices.GetService(typeof(UserManager<ApplicationUser>)) as UserManager<ApplicationUser>; 
    SignInManager<ApplicationUser> _signInManager = HttpContext.ApplicationServices.GetService(typeof(SignInManager<ApplicationUser>)) as SignInManager<ApplicationUser>; 

    var result = await _signInManager.PasswordSignInAsync(email, password, isPersistent: false, lockoutOnFailure: false); 

    if (result.Succeeded) 
    {     
     return true; 
    } 
    else 
    { 
     return false; 
    } 
} 

和Post方法與調用是

[HttpPost]   
public dynamic Post([FromBody] AuthRequest req) 
{ 
string email = req.username; 
string password = req.password; 

try 
{ 
    bool isAuthenticated = false; 

    //implement the authentication logic over here 
    isAuthenticated = AuthenticateUser(email, password).Result; 

    if (isAuthenticated) 
    { 
     DateTime? expires = DateTime.UtcNow.AddDays(2); 
     var token = GetToken(req.username, expires); 
     return new { authenticated = true, entityId = 1, token = token, tokenExpires = expires }; 
    } 
} 
catch (Exception ex) 
{ 
    return new { authenticated = false, message = "Exception: " + ex.Message, detailedmessage = ex.InnerException}; 
} 

return new { authenticated = false }; 
} 

現在的問題......

崗位執行罰款第一次調用和返回所需的結果，但是，在第二個電話，它會引發以下異常

無驗證處理程序被配置爲處理方案：Microsoft.AspNet.Identity.Application

在調試我發現，執行以下線的時候這個異常被拋出

var result = await _signInManager.PasswordSignInAsync(email, password, isPersistent: false, lockoutOnFailure: false); 

它在第一次調用時工作正常，但在所有後續調用中拋出異常。

我一直在尋找這個問題的過去2天，我發現的所有是Startup.cs app.UseIdentity（）;應該在添加認證中間件之前調用。它已經在我的代碼中發生了。

請建議我在這裏錯過什麼。

Answer 1

通過在AuthenticateUser（）方法中將HttpContext.ApplicationServices.GetService（）更改爲HttpContext.RequestServices.GetService（）來解決此問題。我更新的方法是

public async Task<bool> AuthenticateUser(string email, string password) 
    {       
     UserManager<ApplicationUser> _userManager = HttpContext.RequestServices.GetService(typeof(UserManager<ApplicationUser>)) as UserManager<ApplicationUser>; 
     SignInManager<ApplicationUser> _signInManager = HttpContext.RequestServices.GetService(typeof(SignInManager<ApplicationUser>)) as SignInManager<ApplicationUser>; 

     var result = await _signInManager.PasswordSignInAsync(email, password, isPersistent: false, lockoutOnFailure: false); 
     if (result.Succeeded) 
     {     
      return true; 
     } 
     else 
     { 
      return false; 
     } 
    }