c#判断IP是否是百度ip或者谷歌ip

//题目。现在有个白名单ip文本文件，文件中每个ip以；(冒号)分开，在程序的文本框中输入网站上的ip，判断该ip是白名单ip还是蜘蛛，程序是win Form应用

//使用nslookup ip命令反解ip来 判断是否来自Baiduspider的抓取。打开命令处理器 输入nslookup xxx.xxx.xxx.xxx（IP地 址）就能解析ip， 来判断是否来自Baiduspider的抓取，Baiduspider的hostname以*.baidu.com 或*.baidu.jp 的格式命名，非 *.baidu.com 或 *.baidu.jp 即为冒充。谷歌的判断方法一样
//相关网站
//【官方说法】只需两步，正确识别百度蜘蛛  https://ziyuan.baidu.com/college/articleinfo?id=1002

//其他网站说明
http://www.clownseo.com/seojsfx/154.html

//判断ip的网站程序
http://ip.tongmengguo.com/?ip=192.168.1.115




using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Windows.Forms;

namespace IpBlacklist
{
    public partial class ExamineIPForm : Form
    {
        public ExamineIPForm()
        {
            InitializeComponent();
        }
        static List<string> whiteTextIp = new List<string>();

        private void Form1_Load(object sender, EventArgs e)
        {
            labelText.Text = "请在文本框中输入ip,每个ip以;(小写分号)隔开,然后点击检查按钮,最后点击黑名单按钮选取黑名单ip。";
        }


        //点击检测按钮
        private void button1_Click(object sender, EventArgs e)
        {
            //文本框Ip
            string richTextBoxIpTextText = richTextBoxExamineTextIP.Text;
            string[] textIpn = richTextBoxIpTextText.Split(';');
            List<string> textIp = new List<string>();
            foreach (string s in textIpn)
            {
                textIp.Add(s.Replace("\n", null));
            }

            textIp.Remove("");
            if (textIp.Count != 0)
            {
                buttonClick(textIp);
            }
            else
            {
                MessageBox.Show("请输入IP!");
            }
        }
        private void buttonClick(List<string> textIp)
        {
            whiteTextIp = new List<string>();
            labelText.Text = "检查中...";


            //取得文件ip
            string[] dbIpList = WhiteTxt();


            int textIpCount;
            textIpCount = textIp.Count;
            if (textIp[0] == "" || textIp[0] == 
                null)
            {
                textIpCount = 0;
            }

            //从文本框中找出白名单ip
            List<string> whiteTextList = new List<string>();
            for (int i=0;i< textIpCount; i++)
            {
                foreach (string dbIp in dbIpList)
                {
                        //文本框ip与文件ip对比
                        if (textIp[i]== dbIp)
                        {
                            //保存白名单ip
                            whiteTextList.Add(textIp[i]);
                        }
                }
            }

            //在全部文本框ip中剔除白名单ip,保存黑名单ip
            whiteTextIp.AddRange(textIp);
            for (int tIp=0 ;tIp<textIp.Count;tIp++)
            {
                foreach (string wIp in whiteTextList)
                {
                    if (textIp[tIp]== wIp)
                    {
                        whiteTextIp.RemoveAll(r => r == wIp);
                    }
                }
            }

            //百度蜘蛛ip
            List<string> baiduspiderIp=new List<string>();
            if (whiteTextIp.Count!=0)
            {
                List<string> dosCommand =new List<string>(whiteTextIp);
                    baiduspiderIp = Baiduspider(dosCommand);
            }

            labelText.Text = "检查完成,共输入了"+ textIpCount + "个Ip,其中蜘蛛"+ baiduspiderIp.Count+"个,白名单"+ whiteTextList.Count+"个,黑名单"+ whiteTextIp.Count + "个。";

        }
        private void button1_Click_1(object sender, EventArgs e)
        {
            White white = new White();
            white.Show();
            foreach (string whiteIp in whiteTextIp)
            {
                white.richTextBoxTextIp.Text += whiteIp+";\n";
            }
        }

        /// <summary>
        /// 是否是百度或谷歌的蜘蛛ip
        /// </summary>
        /// <returns></returns>
        public static List<string> Baiduspider(List<string> dosCommand)
        {
          //  string dosCommand = "nslookup 123.125.71.10";
            Process p = new Process(); //创建进程对象   
            p.StartInfo.FileName = "cmd.exe"; //设定需要执行的命令
            p.StartInfo.UseShellExecute = false; //不使用系统外壳程序启动
            p.StartInfo.RedirectStandardInput = true; //重定向输入
            p.StartInfo.RedirectStandardOutput = true; //重定向输出
            p.StartInfo.RedirectStandardError = true; //重定向错误
            p.StartInfo.CreateNoWindow = true; //不创建窗口
            //p.StartInfo.Arguments = "/c" + dosCommand; //设定参数，其中的“/C”表示执行完命令后马上退出

            string output;
            List<string> baiduspiderIp = new List<string>();
            foreach (string s in dosCommand)
            {

                p.StartInfo.Arguments = "/c nslookup " + s;
                p.Start();
                output = p.StandardOutput.ReadToEnd(); //读取进程的输出  
                if (output.Contains("baiduspider")|| output.Contains("googlebot.com"))
                {
                    baiduspiderIp.Add(s);
                    whiteTextIp.Remove(s);
                }
            }
            //p.WaitForExit(2000);
            p.Close();

            return baiduspiderIp;
        }


        public static string[] WhiteTxt()
        {
            string textUrl= Directory.GetCurrentDirectory();

            string[] strs1 = File.ReadAllLines(textUrl+"\\WhiteTxt.txt");
            return strs1;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            richTextBoxExamineTextIP.Text = null;
            labelText.Text = "请在文本框中输入ip,每个ip以;(小写分号)隔开,然后点击检查按钮,最后点击黑名单按钮选取黑名单ip。";
        }
    }
}