如何用MVC ActionFilter(或其他东西)替换基本控制器

本文关键字:替换 控制器 其他 MVC 何用 ActionFilter | 更新日期: 2023-09-27 17:57:45

我正在努力改进我的MVC设计。在每个页面上,我都需要读取一个cookie,并在此基础上设置一个具有各种值的User对象(与身份验证无关)。

我目前所做的是让所有控制器从BaseController继承,并在BaseController中使用User对象。

public class BaseController : Controller
{
    protected User thisUser { get; private set; }
    protected override void Initialize(System.Web.Routing.RequestContext requestContext)
    {
         // ... read cookie, set values of thisUser
    }
}

这是一个糟糕的设计吗?我喜欢它只定义User一次,但我已经阅读了ASP中基本控制器类的好候选者是什么的答案。NET MVC,如果有更好的方法,我愿意重做。但我绝对不想要在每个控制器上重复User thisUser = new User();的方法,而且我看不出如果没有基本控制器,我怎么能实现这样的方法。我找不到这样使用ActionFilters的好例子。

我还没有使用DI框架,但如果它能解决问题,我会使用的。如果这意味着将User作为参数传递到每个控制器或动作中,我不确定这是否是DRY赌注的改进。

我确信我遗漏了一些东西。任何帮助都将不胜感激。。。

如何用MVC ActionFilter(或其他东西)替换基本控制器

创建接口

interface ICustomPrincipal : IPrincipal
{
    int UserId { get; set; }
    string FirstName { get; set; }
    string LastName { get; set; }
}

CustomPrincipal

public class CustomPrincipal : ICustomPrincipal
{
    public IIdentity Identity { get; private set; }
    public bool IsInRole(string role) { return false; }
    public CustomPrincipal(string email)
    {
        this.Identity = new GenericIdentity(email);
    }
    public int UserId { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

CustomPrincipalSerializeModel-用于将自定义信息序列化到FormsAuthenticationTicket对象中的userdata字段中。

public class CustomPrincipalSerializeModel
{
    public int UserId { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

登录方法-使用自定义信息设置cookie

if (Membership.ValidateUser(viewModel.Email, viewModel.Password))
{
    var user = userRepository.Users.Where(u => u.Email == viewModel.Email).First();
    CustomPrincipalSerializeModel serializeModel = new CustomPrincipalSerializeModel();
    serializeModel.UserId = user.Id;
    serializeModel.FirstName = user.FirstName;
    serializeModel.LastName = user.LastName;
    JavaScriptSerializer serializer = new JavaScriptSerializer();
    string userData = serializer.Serialize(serializeModel);
    FormsAuthenticationTicket authTicket = new FormsAuthenticationTicket(
             1,
             viewModel.Email,
             DateTime.Now,
             DateTime.Now.AddMinutes(15),
             false,
             userData);
    string encTicket = FormsAuthentication.Encrypt(authTicket);
    HttpCookie faCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encTicket);
    Response.Cookies.Add(faCookie);
    return RedirectToAction("Index", "Home");
}

Global.asax.cs-读取cookie并替换HttpContext。用户对象,这是通过覆盖PostAuthenticateRequest 来完成的

protected void Application_PostAuthenticateRequest(Object sender, EventArgs e)
{
    HttpCookie authCookie = Request.Cookies[FormsAuthentication.FormsCookieName];
    if (authCookie != null)
    {
        FormsAuthenticationTicket authTicket = FormsAuthentication.Decrypt(authCookie.Value);
        JavaScriptSerializer serializer = new JavaScriptSerializer();
        CustomPrincipalSerializeModel serializeModel = serializer.Deserialize<CustomPrincipalSerializeModel>(authTicket.UserData);
        CustomPrincipal newUser = new CustomPrincipal(authTicket.Name);
        newUser.UserId = serializeModel.UserId;
        newUser.FirstName = serializeModel.FirstName;
        newUser.LastName = serializeModel.LastName;
        HttpContext.Current.User = newUser;
    }
}

访问Razor视图

@((User as CustomPrincipal).Id)
@((User as CustomPrincipal).FirstName)
@((User as CustomPrincipal).LastName)

要获得完整答案,请使用以下主题:ASP。NET MVC-设置自定义IIdentity或IPrincipal