ASP.NET MVC: Enforce AJAX request on an action
I'm looking for a way to enforce a controller's action to be accessed only via an AJAX request.
What is the best way to do this before the action method is called? I want to refactor the following from my action methods:
if(Request.IsAjaxRequest())
// Do something
else
// return 开发者_如何学Pythonan error of some sort
What I'm envisioning is an ActionMethodSelectorAttribute
that can be used like the [AcceptVerbs]
attribute. I have no experience crating such a custom attribute though.
Create an ActionFilter that fires OnActionExecuting
public class AjaxActionFilter : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
if (!filterContext.HttpContext.Request.IsAjaxRequest())
filterContext.Result = new RedirectResult(//path to error message);
}
}
Setting the filter's Result property will prevent execution of the ActionMethod.
You can then apply it as an attribute to your ActionMethods.
Its as simple as this:
public class AjaxOnly : ActionMethodSelectorAttribute
{
public override bool IsValidForRequest(ControllerContext controllerContext, System.Reflection.MethodInfo methodInfo)
{
return controllerContext.HttpContext.IsAjaxRequest();
}
}
I just forget where IsAjaxRequest() comes from, I'm pasting from code I have but "lost" that method. ;)
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