在MVC3中使用自定义IPrincipal和IIdentity

Question

创建我自己的IPrincipal,并IIdentity实现如下图所示:

[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,我创建了一个HttpModule,在它的AuthenticateRequest事件中,我这样做:

    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;
    }

此外,我创建自己的Controller,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,似乎一切都是正确的; 但正如你所看到的,在1号位置我无法访问CustomPrincipal!意味着在这个地方,我有一个RolePrincipal而不是一个CustomPrincipal.例如HttpContext.Current.User是一个RolePrincipal而不是CustomPrincipal.但该RolePrincipal.Identity属性是一个CustomIdentity!

Answer 1

你的错误在这里:

_application.AuthenticateRequest += ApplicationAuthenticateRequest;

有一个HttpModule命名RoleManagerModule调用方法HttpApplication.PostAuthenticateRequest并设置HttpContext.Current.Userto RolePrincipal.因此,您设置了User输入AuthenticateRequest并RoleManagerModule设置了它PostAuthenticateRequest,意味着在设置之后,因此覆盖您的设置.改变你的Module.Init:

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

重要更新:

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