ASP.NET MVC：Controller.HandleUnknownAction 404或405？ [英] ASP.NET MVC: Controller.HandleUnknownAction 404 or 405?

问题描述

我重写ASP.NET MVC的Controller.HandleUnknownAction（字符串actionName）方法。当找不到一个动作它被称为，也当是不允许的HTTP方法。我如何区分这两个？我想返回404时和行动未发现和405时，音符允许的方法。

I'm overriding ASP.NET MVC's Controller.HandleUnknownAction(string actionName) method. It's being called when an action is not found and also when an HTTP method is not allowed. How can I distinguish between the two? I'd like to return a 404 when and action is not found and 405 when a method is note allowed.

推荐答案

我能想到的是创建自定义操作过滤器最简单的方法。这将允许您返回HTTP状态code的结果，如果方法是不允许的。

The simplest way I can think of is to create custom action filter. This will allow you to return http status code result if method is not allowed

public class HttpPostFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (!(filterContext.RequestContext.HttpContext.Request.GetHttpMethodOverride().Equals("post", StringComparison.InvariantCultureIgnoreCase)))
        {
            filterContext.Result = new HttpStatusCodeResult(405);
        }
    }
}

或者更好，创造它更宽泛的版本，很像的 AcceptVerbsAttribute

[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public sealed class AllowMethodsAttribute : ActionFilterAttribute
{
    public ICollection<string> Methods
    {
        get;
        private set;
    }

    public AllowMethodsAttribute(params string[] methods)
    {
        this.Methods = new ReadOnlyCollection<string>(methods);
    }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        string httpMethodOverride = filterContext.HttpContext.Request.GetHttpMethodOverride();
        if (!this.Methods.Contains(httpMethodOverride, StringComparer.InvariantCultureIgnoreCase))
        {
            filterContext.Result = new HttpStatusCodeResult(405);
        }
    }
}

和使用它像

[AllowMethods("GET")]
public ActionResult Index()
{
    ViewBag.Message = "Welcome to ASP.NET MVC!";

    return View();
}

自定义属性采取 HttpVerbs作为参数是由你。

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