Routes.AppendTrailingFlash排除了一些路线

本文关键字：些路 AppendTrailingFlash 排除 Routes | 更新日期: 2023-09-27 18:22:01

在MVC 5.2.2中，我可以将Routes.AppendTrailingSlash设置为true，以便将尾部斜杠附加到URL。

然而，我也有一个机器人控制器，它返回robots.txt的内容。

如何防止Slash被附加到robots.txt路由，并使其在不带尾部斜杠的情况下可调用？

我的控制器代码：

[Route("robots.txt")]
public async Task<ActionResult> Robots()
{
  string robots = getRobotsContent();
  return Content(robots, "text/plain");
}

我的路线配置如下：

routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home",
                                action = "Index",
                                id = UrlParameter.Optional }
            );
RouteTable.Routes.AppendTrailingSlash = true;

Routes.AppendTrailingFlash排除了一些路线

操作过滤器怎么样。我写得很快，不是为了效率。我已经在手动放置和引导"/"的URL上对其进行了测试，并像符咒一样工作。

    public class NoSlash : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            base.OnActionExecuting(filterContext);
            var originalUrl = filterContext.HttpContext.Request.Url.ToString();
            var newUrl = originalUrl.TrimEnd('/');
            if (originalUrl.Length != newUrl.Length)
                filterContext.HttpContext.Response.Redirect(newUrl);
        }
    }

尝试以这种方式使用

   [NoSlash]
   [Route("robots.txt")]
   public async Task<ActionResult> Robots()
   {
       string robots = getRobotsContent();
       return Content(robots, "text/plain");
    }

如果导航到静态.txt文件，ASP.NET的行为是在URL后面有斜杠的情况下返回404 Not Found。

我采用了@Dave Alperovich的方法（谢谢！），并返回了HttpNotFoundResult，而不是重定向到没有斜杠的URL。我认为这两种方法都是完全有效的。

/// <summary>
/// Requires that a HTTP request does not contain a trailing slash. If it does, return a 404 Not Found.
/// This is useful if you are dynamically generating something which acts like it's a file on the web server.
/// E.g. /Robots.txt/ should not have a trailing slash and should be /Robots.txt.
/// </summary>
[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = false)]
public class NoTrailingSlashAttribute : FilterAttribute, IAuthorizationFilter
{
    /// <summary>
    /// Determines whether a request contains a trailing slash and, if it does, calls the <see cref="HandleTrailingSlashRequest"/> method.
    /// </summary>
    /// <param name="filterContext">An object that encapsulates information that is required in order to use the <see cref="System.Web.Mvc.RequireHttpsAttribute"/> attribute.</param>
    /// <exception cref="System.ArgumentNullException">The filterContext parameter is null.</exception>
    public virtual void OnAuthorization(AuthorizationContext filterContext)
    {
        if (filterContext == null)
        {
            throw new ArgumentNullException("filterContext");
        }
        string url = filterContext.HttpContext.Request.Url.ToString();
        if (url[url.Length - 1] == '/')
        {
            this.HandleTrailingSlashRequest(filterContext);
        }
    }
    /// <summary>
    /// Handles HTTP requests that have a trailing slash but are not meant to.
    /// </summary>
    /// <param name="filterContext">An object that encapsulates information that is required in order to use the <see cref="System.Web.Mvc.RequireHttpsAttribute"/> attribute.</param>
    protected virtual void HandleTrailingSlashRequest(AuthorizationContext filterContext)
    {
        filterContext.Result = new HttpNotFoundResult();
    }
}
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