C#分析検索エンジンurl検索キーワードを得る

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Text.RegularExpressions;

using System.Web;



namespace HbTui.Portal

{

    public class SearchKeyWord

    {

        private string[][] _Enginers = new string[][]

        {       

            new string[]{"google","utf8","q"},

            new string[]{"baidu","gb2312","wd"},

            new string[]{"yahoo","utf8","p"},

            new string[]{"yisou","utf8","search"},

            new string[]{"live","utf8","q"},

            new string[]{"tom","gb2312","word"},

            new string[]{"163","gb2312","q"},

            new string[]{"iask","gb2312","k"},

            new string[]{"soso","gb2312","w"},

            new string[]{"sogou","gb2312","query"},

            new string[]{"zhongsou","gb2312","w"},

            new string[]{"3721","gb2312","p"},

            new string[]{"openfind","utf8","q"},

            new string[]{"alltheweb","utf8","q"},

            new string[]{"lycos","utf8","query"},

            new string[]{"youdao","utf8","q"},

            new string[]{"onseek","utf8","q"},

            new string[]{"jike","utf8","q"}

        };



        // 

        private string _EngineName = string.Empty;

        public string EngineName

        {

            get

            {

                return _EngineName;

            }

        }



        // 

        private string _Coding = "utf8";

        public string Coding

        {

            get

            {

                return _Coding;

            }

        }

        // 

        private string _RegexWord = "";

        public string RegexWord

        {

            get

            {

                return _RegexWord;

            }

        }



        private string _Regex = @"(";



        // 

        // 

        public void EngineRegEx(string myString)

        {

            for (int i = 0, j = _Enginers.Length; i < j; i++)

            {

                if (myString.Contains(_Enginers[i][0]))

                {

                    _EngineName = _Enginers[i][0];

                    _Coding = _Enginers[i][1];

                    _RegexWord = _Enginers[i][2];

                    _Regex += _EngineName + @".+.*[?/&]" + _RegexWord + @"[=:])(?<key>[^&]*)";

                    break;

                }

            }

        }



        // 

        public string SearchKey(string myString)

        {

            EngineRegEx(myString.ToLower());

            if (_EngineName != "")

            {

                Regex myReg = new Regex(_Regex, RegexOptions.IgnoreCase);

                Match matche = myReg.Match(myString);

                myString = matche.Groups["key"].Value;

                // +

                myString = myString.Replace("+", " ");

                if (_Coding == "gb2312")

                {

                    myString = GetUTF8String(myString);

                }

                else

                {

                    myString = Uri.UnescapeDataString(myString);

                }

            }

            return myString;

        }



        // 

        public string GetUTF8String(string myString)

        {

            Regex myReg = new Regex("(?<key>%..%..)", RegexOptions.IgnoreCase);

            MatchCollection matches = myReg.Matches(myString);

            string myWord;

            for (int i = 0, j = matches.Count; i < j; i++)

            {

                myWord = matches[i].Groups["key"].Value.ToString();

                myString = myString.Replace(myWord, GB2312ToUTF8(myWord));

            }

            return myString;

        }

        // GB2312 UTF8 URL 

        public string GB2312ToUTF8(string myString)

        {

            string[] myWord = myString.Split('%');

            byte[] myByte = new byte[] { Convert.ToByte(myWord[1], 16), Convert.ToByte(myWord[2], 16) };

            Encoding GB = Encoding.GetEncoding("GB2312");

            Encoding U8 = Encoding.UTF8;

            myByte = Encoding.Convert(GB, U8, myByte);

            char[] Chars = new char[U8.GetCharCount(myByte, 0, myByte.Length)];

            U8.GetChars(myByte, 0, myByte.Length, Chars, 0);

            return new string(Chars);

        }



        // , 

        public string isCrawler(string SystemInfo)

        {

            string[] BotList = new string[] { "Google", "Baidu", "yisou", "MSN", "Yahoo", "live", "tom", "163", "TMCrawler", "iask", "Sogou", "soso", "youdao", "zhongsou", "3721", "openfind", "alltheweb", "lycos", "bing", "118114" };

            foreach (string Bot in BotList)

            {

                if (SystemInfo.ToLower().Contains(Bot.ToLower()))

                {

                    return Bot;

                }

            }

            return "null";

        }

        public bool IsSearchEnginesGet(string str)

        {

            string[] strArray = new string[] { "Google", "Baidu", "yisou", "MSN", "Yahoo", "live", "tom", "163", "TMCrawler", "iask", 

            "Sogou", "soso", "youdao", "zhongsou", "3721", "openfind","alltheweb", "lycos", "bing", "118114"};

            str = str.ToLower();

            for (int i = 0; i < strArray.Length; i++)

            {

                if (str.IndexOf(strArray[i].ToLower()) >= 0)

                {

                    return true;

                }

            }

            return false;

        }

    }

}