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?
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;
...
}