无法从 apicontroller 中的 OwinContext 获取 UserManager

Question

我正在按照 Microsoft 示例使用 Identity 2.0.0 实施电子邮件验证

我被困在这部分

public ApplicationUserManager UserManager
{
   get
   {
      return _userManager ?? HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>();
   }
   private set
   {
      _userManager = value;
   }
}

这适用于 controller 但 HttpContext 不包含任何 GetOwinContext 方法中的 API控制器.

所以我尝试了 HttpContext.Current.GetOwinContext() 但方法 GetUserManager 不存在。

我想不出一种方法来获得 UserManager 我内置 启动.Auth.cs

// For more information on configuring authentication, please visit http://go.microsoft.com/fwlink/?LinkId=301864
public void ConfigureAuth(IAppBuilder app)
{
    //Configure the db context, user manager and role manager to use a single instance per request
    app.CreatePerOwinContext(ApplicationDbContext.Create);
    app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create); 
    ...
}

这条线

app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);

调用以下函数来配置 UserManager

public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options, IOwinContext context)
{
     var manager = new ApplicationUserManager(new UserStore<ApplicationUser>(context.Get<ApplicationDbContext>()));
     //Configure validation logic for usernames
     manager.UserValidator = new UserValidator<ApplicationUser>(manager)
     {
         AllowOnlyAlphanumericUserNames = false,
         RequireUniqueEmail = true
     };

     // Configure user lockout defaults
     manager.UserLockoutEnabledByDefault = true;
     manager.DefaultAccountLockoutTimeSpan = TimeSpan.FromMinutes(5);
     manager.MaxFailedAccessAttemptsBeforeLockout = 5;

     manager.EmailService = new EmailService();

     var dataProtectionProvider = options.DataProtectionProvider;
     if (dataProtectionProvider != null)
     {
         manager.UserTokenProvider = new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"));
     }
     return manager;
}

我怎样才能访问这个 UserManager 在一个 ApiController?

Answer 1

我之前确实误解了你的问题。我认为您只是缺少一些 using 语句。

这 GetOwinContext().GetUserManager<ApplicationUserManager>() 是在 Microsoft.AspNet.Identity.Owin.

所以尝试添加这部分：

using Microsoft.AspNet.Identity.Owin;
using Microsoft.AspNet.Identity; // Maybe this one too

var manager = HttpContext.Current.GetOwinContext().GetUserManager<UserManager<User>>();

Answer 2

如果您想对控制器进行单元测试，此扩展方法可能是更好的解决方案。

using System;
using System.Net.Http;
using System.Web;
using Microsoft.Owin;

public static IOwinContext GetOwinContext(this HttpRequestMessage request)
{
    var context = request.Properties["MS_HttpContext"] as HttpContextWrapper;
    if (context != null)
    {
        return HttpContextBaseExtensions.GetOwinContext(context.Request);
    }
    return null;
}

用法：

public ApplicationUserManager UserManager
{
   get
   {
      return _userManager ?? Request.GetOwinContext().GetUserManager<ApplicationUserManager>();
   }
   private set
   {
      _userManager = value;
   }
}

Answer 3

这行代码拯救了我的一天......

       var manager = 
       new ApplicationUserManager(new UserStore<ApplicationUser>(new ApplicationDbContext()));

您可以在控制器操作中使用它来获取 UserManager 的实例。