ASP.NET中指定自定义HTTP响应标头

新建一个类HideServerHeaderHelper，继承 IHttpModule，然后重写 OnPreSendRequestHeaders，Dispose，Init方法，如下代码所示

using System;
using System.Collections.Generic;
using System.Web;

namespace MvcApp.Filters
{
    public class HideServerHeaderHelper : IHttpModule
    {
        /// <summary>
        /// List of Headers to remove
        /// </summary>
        private readonly List<string> _headersToCloak;

        /// <summary>
        /// Initializes a new instance of the <see cref="HideServerHeaderModule"/> class.
        /// </summary>
        public HideServerHeaderHelper()
        {
            _headersToCloak = new List<string>
                                      {
                                              "Server",
                                              "X-AspNet-Version",
                                              "X-AspNetMvc-Version",
                                              "X-Powered-By"
                                      };
        }

        private void OnPreSendRequestHeaders(object sender, EventArgs e)
        {
            //设置Server的值

            _headersToCloak.ForEach(h => HttpContext.Current.Response.Headers.Remove(h));
            HttpContext.Current.Response.Headers.Set("Server", "nginx");
            HttpContext.Current.Response.Headers.Set("Powered-By", "东讯科技有限公司");
        }

        public void Dispose()
        {
            _headersToCloak.Clear();
        }

        public void Init(HttpApplication context)
        {
            context.PreSendRequestHeaders += OnPreSendRequestHeaders;
        }
    }
}

在web.config添加以下模块

<system.webServer>
    <modules runAllManagedModulesForAllRequests="true">
      <add name="HideServerHeaderModule" type="MvcApp.Filters.HideServerHeaderModule"/>
    </modules>

 <httpProtocol>
      <customHeaders>
        <remove name="Server"/>
        <remove name="X-AspNet-Version"/>
        <remove name="X-AspNetMvc-Version"/>
        <remove name="X-Powered-By"/>
      </customHeaders>
    </httpProtocol>
  </system.webServer>