在MVC3中使用自定义IPrincipal和IIdentity
我创建了我自己的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事件中执行此操作：
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，我创建了我自己的Controller和WebViewPage如下所示：
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; 但正如您所看到的，在Place number 1中，我无法访问CustomPrincipal ！ 在这个地方，我有一个RolePrincipal而不是一个CustomPrincipal 。 例如HttpContext.Current.User是RolePrincipal而不是CustomPrincipal 。 但RolePrincipal.Identity属性是一个CustomIdentity ！
你的错误在这里：
_application.AuthenticateRequest += ApplicationAuthenticateRequest;
有一个名为RoleManagerModule的HttpModule调用HttpApplication.PostAuthenticateRequest的方法，并将HttpContext.Current.User设置为RolePrincipal 。 因此，您将User设置为AuthenticateRequest ，而RoleManagerModule将其设置为PostAuthenticateRequest ，意味着在您设置之后，将覆盖您的设置。 改变你的Module.Init ：
public void Init(HttpApplication context) {
_application = context;
// change just this line:
_application.PostAuthenticateRequest += ApplicationAuthenticateRequest;
}
重要更新：
请看这个问题 - 由起始者再次提出，依赖于当前的问题 - 对于第二个解决方案，如果这个不起作用。
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