ASP.NET MVC: ignore user attribute in base controller class

Question

I have several controllers in my project that all inherit from the controller that I called BaseController. I wrote a custom attribute that I applied to the entire BaseController class, so that every time an action is performed on any of my controllers, this attribute will work first.

The problem is that I have several actions with the controller that I would like to ignore this attribute, but I do not know how to do this.

Can anyone help? I am using MVC 1.

Thanks.

Answer 1

- , , , (/ FilterAttribute, IAuthorizationFilter), ( ActionFilterAttribute) Inherited=true AllowMultiple=false , .

, "" ( ), (, AdminController - ) .

,

[AttributeUsage(AttributeTargets.Class|AttributeTargets.Method, Inherited=true, AllowMultiple=false)]
public class MyCustomAttribute : FilterAttribute, IAuthorizationFilter
{
    private MyCustomMode _Mode;
    public MyCustomAttribute(MyCustomMode mode)
    {
        _Mode = mode;
    }
    public virtual void OnAuthorization(AuthorizationContext filterContext)
    {
        if (filterContext == null)
        {
            throw new ArgumentNullException("filterContext");
        }
        // run my own logic here.
        // set the filterContext.Result to anything non-null (such as
        // a RedirectResult?) to skip the action method execution.
        //
        //
    }
}

public enum MyCustomMode
{
    Enforce,
    Ignore
}

, , ,

[MyCustomAttribute(Ignore)]
public class BaseController : Controller
{
}

/ !

[MyCustomAttribute(Enforce)]
public class AdministrationController : BaseController
{
    public ActionResult Index()
    {
    }

    [MyCustomAttribute(Ignore)] 
    public ActionResult SomeBasicPageSuchAsAHelpDocument()
    {
    }
}

"" , , .

!

Answer 2

ShouldRun() :

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (ShouldRun(filterContext))
        {
            // proceed with your code
        }
    }

    private bool ShouldRun(ActionExecutingContext filterContext)
    {
        var ignoreAttributes = filterContext.ActionDescriptor.GetCustomAttributes(typeof(IgnoreMyCustomAttribute), false);
        if (ignoreAttributes.Length > 0)
            return false;

        return true;
    }

ShouldRun() , "IgnoreMyCustomAttribute". , .

IgnoreMyCustomAttribute, :

[AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
public class IgnoreMyCustomAttribute: ActionFilterAttribute
{
}

, [IgnoreMyCustom], MyCustomAttribute . :.

[IgnoreMyCustom]
public ViewResult MyAction() {
}

Answer 3

, . - , , , , , .

, , , , .

, , .

:

/// <summary>
/// This is used to force the schema to HTTP is it is HTTPS.
/// RequireHttpsAttribute or OptionalHttpsAttribute takes precedence if used.
/// </summary>
public class RequireHttpAttribute : FilterAttribute, IAuthorizationFilter
{
    public virtual void OnAuthorization(AuthorizationContext filterContext)
    {
        if (filterContext == null)
            throw new ArgumentNullException("filterContext");

        if (filterContext.HttpContext.Request.IsSecureConnection)
        {
            object[] attributes = filterContext.ActionDescriptor.GetCustomAttributes(true);
            if (!attributes.Any(a => a is RequireHttpsAttribute || a is OptionalHttpsAttribute))
            {
                HandleHttpsRequest(filterContext);
            }
        }
    }

    protected virtual void HandleHttpsRequest(AuthorizationContext filterContext)
    {
        //  only redirect for GET method, otherwise browser may not propogate the verb and request body correctly
        if (!string.Equals(filterContext.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase))
            throw new InvalidOperationException(MvcResources.RequireHttpAttribute_MustNotUseSsl);

        //  redirect to HTTP version
        string url = "http://" + filterContext.HttpContext.Request.Url.Host + filterContext.HttpContext.Request.RawUrl;
        filterContext.Result = new RedirectResult(url);
    }
}

:

[RequireHttp]
public abstract class Controller : System.Web.Mvc.Controller
{
}

, , .

/// <summary>
/// This attribute allows the action to be server on HTTP and HTTPS but neither is enforce.
/// RequireHttpsAttribute takes precedence if used.
/// </summary>
public class OptionalHttpsAttribute : FilterAttribute
{
    // This is deliberately empty, the attribute is used by RequireHttpAttribute to stop it changing schema to HTTP
}

:

    [OptionalHttps]
    public ActionResult OptionalHttps()
    {
        return View();
    }