asp.net-mvc-3 - 在MVC3中使用自定义IPrincipal和IIdentity

Question

我创建自己的IPrincipal和IIdentity实现，如下所示:

[ComVisible(true)]
[Serializable]
public sealed class CustomIdentity : IIdentity {

    private readonly string _name;
    private readonly string _email;
    // and other stuffs

    public CustomIdentity(string name) {
        _name = name.Trim();
        if(string.IsNullOrWhiteSpace(name))
            return;
        _email = (connect to database and read email and other stuffs);
    }

    public string Name {
        get { return _name; }
    }

    public string Email {
        get { return _email; }
    }

    public string AuthenticationType {
        get { return "CustomIdentity"; }
    }

    public bool IsAuthenticated {
        get { return !string.IsNullOrWhiteSpace(_name); }
    }

}


[ComVisible(true)]
[Serializable]
public sealed class CustomPrincipal : IPrincipal {

    private readonly CustomIdentity _identity;

    public CustomPrincipal(CustomIdentity identity) {
        _identity = identity;
    }

    public bool IsInRole(string role) {
        return _identity != null && 
               _identity.IsAuthenticated &&
               !string.IsNullOrWhiteSpace(role) &&
               Roles.IsUserInRole(_identity.Name, role);
    }

    IIdentity IPrincipal.Identity {
        get { return _identity; }
    }

    public CustomIdentity Identity {
        get { return _identity; }
    }

}

另外，我创建一个 HttpModule，并在其 AuthenticateRequest事件中执行以下操作:

    public void Init(HttpApplication context) {
        _application = context;
        _application.AuthenticateRequest += ApplicationAuthenticateRequest;
    }

    private void ApplicationAuthenticateRequest(object sender, EventArgs e) {
        var formsCookie = _application.Request.Cookies[FormsAuthentication.FormsCookieName];
        var identity = formsCookie != null
             ? new CustomIdentity(FormsAuthentication.Decrypt(formsCookie.Value).Name)
             : new CustomIdentity(string.Empty);
        var principal = new CustomPrincipal(identity);
        _application.Context.User = Thread.CurrentPrincipal = principal;
    }

另外，我创建自己的 Controller和 WebViewPage像这样:

public abstract class CustomController : Controller {
    public new CustomPrincipal User {
        get {
            var user = System.Web.HttpContext.Current.User as CustomPrincipal;
            return user;
        }
    }
}


public abstract class CustomWebViewPage<TModel> : WebViewPage<TModel> {
    public new CustomPrincipal User {
        get {
            // (Place number 1) here is the error I'm speaking about!!!
            var user = HttpContext.Current.User as CustomPrincipal;
            return user;
        }
    }
}

如上面的代码所示，似乎一切正确。但是正如您所看到的，在 位置1 中，我无法访问 CustomPrincipal!在这个地方，我有一个 RolePrincipal而不是 CustomPrincipal。例如 HttpContext.Current.User是 RolePrincipal而不是 CustomPrincipal。但是 RolePrincipal.Identity属性是 CustomIdentity!

Answer 1

您的错误在这里:

_application.AuthenticateRequest += ApplicationAuthenticateRequest;

有一个名为 HttpModule的 RoleManagerModule，它会调用 HttpApplication.PostAuthenticateRequest中的方法，并将 HttpContext.Current.User设置为 RolePrincipal。因此，您在 User中设置了 AuthenticateRequest，而 RoleManagerModule在 PostAuthenticateRequest中设置了它，意味着设置之后，因此将覆盖您的设置。更改您的 Module.Init:

public void Init(HttpApplication context) {
    _application = context;
    // change just this line:
    _application.PostAuthenticateRequest += ApplicationAuthenticateRequest;
}

重要更新:

如果此方法不起作用，请再次查看 this question(由入门者再次询问，取决于当前问题)以寻求第二种解决方案。