让Swagger隐藏/忽略指定接口类或方法

swagger的一个最大的优点是能实时同步api与文档，但有些时候我们不想全部公开接口，而要隐藏或屏蔽一些接口类或方法，swagger也是支持的，只需要设置一下DocumentFilter方法。

using System;

namespace YuanFeng.LegalDoc.Api
{
    /// <summary>
    /// 隐藏swagger接口特性标识
    /// </summary>
    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class)]
    public class HiddenApiAttribute : System.Attribute
    {
    }
}

using Microsoft.OpenApi.Models;
using Swashbuckle.AspNetCore.SwaggerGen;
using System.Linq;
using System.Reflection;

namespace YuanFeng.LegalDoc.Api
{
    /// <summary>
    /// 自定义Swagger隐藏过滤器
    /// </summary>
    public class HiddenApiFilter : Swashbuckle.AspNetCore.SwaggerGen.IDocumentFilter
    {
        public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context)
        {
            foreach (var apiDescription in context.ApiDescriptions)
            {
                if (apiDescription.TryGetMethodInfo(out MethodInfo method))
                {
                    if (method.ReflectedType.CustomAttributes.Any(t => t.AttributeType == typeof(HiddenApiAttribute))
                      || method.CustomAttributes.Any(t => t.AttributeType == typeof(HiddenApiAttribute)))
                    {
                        string key = "/" + apiDescription.RelativePath;
                        if (key.Contains("?"))
                        {
                            int idx = key.IndexOf("?", System.StringComparison.Ordinal);
                            key = key.Substring(0, idx);
                        }
                        swaggerDoc.Paths.Remove(key);
                    }
                }
            }
        }
    }
}

   c.DocumentFilter<HiddenApiFilter>();

 /// <summary>
        /// 案例要旨-批量下载接口 v2
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        [Route("library/alyzlajsbatchdownload")]
        [HttpPost]
        [HiddenApi]