如何在其他控制器中使用授权用户名

时间:2012-06-21 09:40:34

标签: asp.net asp.net-mvc asp.net-web-api

使用基本身份验证和asp.net Web-Api,其中JSON Get / Post到我的API,我需要检查成员资格表中是否存在用户名/密码。以下代码的作用如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Security;

namespace MvcApplication4.Filter
{
    public class BasicAuthenticationAttribute : System.Web.Http.Filters.ActionFilterAttribute
    {
        public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
        {
            if (actionContext.Request.Headers.Authorization == null)
            {
                actionContext.Response = new System.Net.Http.HttpResponseMessage(System.Net.HttpStatusCode.Unauthorized);
            }
            else
            {
                string authToken = actionContext.Request.Headers.Authorization.Parameter;
                string decodedToken = Encoding.UTF8.GetString(Convert.FromBase64String(authToken));
                string username = decodedToken.Substring(0, decodedToken.IndexOf(":"));
                string password = decodedToken.Substring(decodedToken.IndexOf(":") + 1);

                if (Membership.Provider.ValidateUser(username, password))
                {
                    // User exists in the membership table
                }
                else
                {
                    // User doesn't exist - so return Unathorized
                    actionContext.Response = new System.Net.Http.HttpResponseMessage(System.Net.HttpStatusCode.Unauthorized);
                }
            }
        }
    }
}

我需要在其他控制器中引用用户名,以确保用户名也存在于查找表中,该表说明允许用户查询哪些车辆。我的数据库中有一个表,还有一个关联的类:

public class ApiMembers
    {
        public int id { get; set; }
        public string UserName { get; set; }
        public int car_id { get; set; }
    }


 [BasicAuthentication]
        public IEnumerable<Cars> GetCars(long id)
        {
            var auth = dba.ApiMembers.Select(a => a.car_id == id && a.UserName=***AuthorisedUserName***).FirstOrDefault();
            if (auth == null || !auth.Any())
                 {
                        throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.Unauthorized));
                 }
            else
            {
                // User exists in table, so give them info on car
            }

我的问题是,无需再次阅读HTTP标头,如何将UserName引入 AuthorisedUserName 部分?有没有办法在BasicAuthentication过滤器中“登录”用户,或者您是否可以使用会话变量,例如在webforms中?或者有更好的方法来了解谁在其他控制器中进行了身份验证?

1 个答案:

答案 0 :(得分:3)

您可以设置当前主体:

if (Membership.Provider.ValidateUser(username, password))
{
    // User exists in the membership table
    var identity = new GenericIdentity(username);
    Thread.CurrentPrincipal = new GenericPrincipal(identity, null);
}

现在在您的ApiController中,您可以使用User属性来访问当前连接的用户名(注释此属性已添加到ASP.NET MVC 4 RC中 - 在以前的版本中,您可以使用Request.GetPrincipal扩展名法)。

[BasicAuthentication]
public HttpResponseMessage Get()
{
    string username = User.Identity.Name;

    ...
}