using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.IO.Compression;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;
using System.Drawing;
using System.Security.Authentication;


    /// <summary>    
    /// Http连接操作帮助类    
    /// </summary>    
    public class HttpHelper: System.IDisposable
    {
        private static bool RemoteCertificateValidate(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors error)
        {
            // trust any certificate!!!    
            System.Console.WriteLine("Warning, trust any certificate");
            //为了通过证书验证，总是返回true    
            return true;
        }


        #region 预定义方变量  
        //默认的编码    
        private Encoding encoding = Encoding.Default;
        //Post数据编码    
        private Encoding postencoding = Encoding.Default;
        //HttpWebRequest对象用来发起请求    
        private HttpWebRequest request = null;
        //获取影响流的数据对象    
        private HttpWebResponse response = null;
        //cookie集合  
        private static CookieCollection cks = new CookieCollection();

        #endregion

        public void Dispose()
        {
            if (request != null) {
                request.Abort();
                request = null;
                response.Close();
                response = null;
            }
        }


        #region Public  


        public HttpHelper()
        {
            ServicePointManager.ServerCertificateValidationCallback += RemoteCertificateValidate;//验证服务器证书回调自动验证    
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
        }

        /// <summary>  
        /// 添加cookies  
        /// </summary>  
        /// <param name="key"></param>  
        /// <param name="value"></param>  
        /// <param name="domain"></param>  
        public static void AddCookie(string key, string value, string domain)
        {
            Cookie c = new Cookie();
            c.Domain = !domain.Contains(":") ? domain : domain.Split(':')[0] == "127.0.0.1" ? "localhost" : domain.Split(':')[0];
            c.Expires = DateTime.Now.AddDays(30);
            c.Name = key;
            c.Path = "/";
            c.Secure = false;
            c.Value = value;
            cks.Add(c);
        }

        /// <summary>  
        /// 初始化cookie  
        /// </summary>  
        /// <param name="result"></param>  
        private void InitCookies(HttpResult result)
        {
            if (result.CookieCollection != null && result.CookieCollection.Count > 0)
            {
                for (int i = 0; i < result.CookieCollection.Count; i++)
                {
                    Cookie c = result.CookieCollection[i];
                    c.Domain = c.Domain.Trim() == "" ? "localhost" : c.Domain;
                    c.Path = c.Path.Trim() == "" ? "/" : c.Path;
                    cks.Add(c);
                }
            }
        }

        /// <summary>  
        /// 发送请求时自动带入cookie  
        /// </summary>  
        /// <param name="item"></param>  
        private void AutoCookies(HttpItem item)
        {
            if (cks.Count > 0)
            {
                item.CookieCollection = cks;
            }
        }

        /// <summary>    
        /// 获取图片    
        /// </summary>    
        /// <param name="item"></param>    
        /// <returns></returns>    
        public Image GetImage(HttpItem item)
        {
            item.ResultType = ResultType.Byte;
            byte[] bt = GetHtml(item).ResultByte;
            using (MemoryStream ms = new MemoryStream(bt))
            {
                return Image.FromStream(ms);
            }
        }


        /// <summary>    
        /// 根据相传入的数据，得到相应页面数据    
        /// </summary>    
        /// <param name="item">参数类对象</param>    
        /// <returns>返回HttpResult类型</returns>    
        public HttpResult GetHtml(HttpItem item)
        {
            //返回参数    
            HttpResult result = new HttpResult();
            try
            {
                //准备参数    
                SetRequest(item);
            }
            catch (Exception ex)
            {
                result.Cookie = string.Empty;
                result.Header = null;
                result.Html = ex.Message;
                result.StatusDescription = "配置参数时出错：" + ex.Message;
                //配置参数时出错    
                return result;
            }
            try
            {
                //请求数据    
                using (response = (HttpWebResponse)request.GetResponse())
                {
                    GetData(item, result);
                }
            }
            catch (WebException ex)
            {
                using (response = (HttpWebResponse)ex.Response)
                {
                    GetData(item, result);
                }
            }
            catch (Exception ex)
            {
                result.Html = ex.Message;
            }
            finally
            {
                if (request != null)
                {
                    request.Abort();
                }
                if (response != null)
                {
                    response.Close();
                }
            }
            if (item.IsToLower) result.Html = result.Html.ToLower();
            //根据返回的cookie自动加入缓存  
            InitCookies(result);
            return result;
        }
        #endregion


        #region GetData  


        /// <summary>    
        /// 获取数据的并解析的方法    
        /// </summary>    
        /// <param name="item"></param>    
        /// <param name="result"></param>    
        private void GetData(HttpItem item, HttpResult result)
        {
            #region base  
            //获取StatusCode    
            result.StatusCode = response.StatusCode;
            //获取StatusDescription    
            result.StatusDescription = response.StatusDescription;
            //获取Headers    
            result.Header = response.Headers;
            //获取CookieCollection    
            if (response.Cookies != null) result.CookieCollection = response.Cookies;
            //获取set-cookie    
            if (response.Headers["set-cookie"] != null) result.Cookie = response.Headers["set-cookie"];
            #endregion


            #region byte  
            //处理网页Byte    
            byte[] ResponseByte = GetByte();
            #endregion


            #region Html  
            if (item.ResultType == ResultType.Image)
            {
                MemoryStream ms = new MemoryStream(ResponseByte);
                result.image = Image.FromStream(ms);
            }
            else
            {
                if (ResponseByte != null & ResponseByte.Length > 0)
                {
                    //设置编码    
                    SetEncoding(item, result, ResponseByte);
                    //得到返回的HTML    
                    result.Html = encoding.GetString(ResponseByte);
                }
                else
                {
                    //没有返回任何Html代码    
                    result.Html = string.Empty;
                }
            }
            #endregion
        }
        /// <summary>    
        /// 设置编码    
        /// </summary>    
        /// <param name="item">HttpItem</param>    
        /// <param name="result">HttpResult</param>    
        /// <param name="ResponseByte">byte[]</param>    
        private void SetEncoding(HttpItem item, HttpResult result, byte[] ResponseByte)
        {
            //是否返回Byte类型数据    
            if (item.ResultType == ResultType.Byte) result.ResultByte = ResponseByte;
            //从这里开始我们要无视编码了    
            if (encoding == null)
            {
                Match meta = Regex.Match(Encoding.Default.GetString(ResponseByte), "<meta[^<]*charset=([^<]*)[\"']", RegexOptions.IgnoreCase);
                string c = string.Empty;
                if (meta != null && meta.Groups.Count > 0)
                {
                    c = meta.Groups[1].Value.ToLower().Trim();
                }
                if (c.Length > 2)
                {
                    try
                    {
                        encoding = Encoding.GetEncoding(c.Replace("\"", string.Empty).Replace("'", "").Replace(";", "").Replace("iso-8859-1", "gbk").Trim());
                    }
                    catch
                    {
                        if (string.IsNullOrEmpty(response.CharacterSet))
                        {
                            encoding = Encoding.UTF8;
                        }
                        else
                        {
                            encoding = Encoding.GetEncoding(response.CharacterSet);
                        }
                    }
                }
                else
                {
                    if (string.IsNullOrEmpty(response.CharacterSet))
                    {
                        encoding = Encoding.UTF8;
                    }
                    else
                    {
                        encoding = Encoding.GetEncoding(response.CharacterSet);
                    }
                }
            }
        }
        /// <summary>    
        /// 提取网页Byte    
        /// </summary>    
        /// <returns></returns>    
        private byte[] GetByte()
        {
            byte[] ResponseByte = null;
            MemoryStream _stream = new MemoryStream();

            //GZIIP处理    
            if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
            {
                //开始读取流并设置编码方式    
                _stream = GetMemoryStream(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress));
            }
            else
            {
                //开始读取流并设置编码方式    
                _stream = GetMemoryStream(response.GetResponseStream());
            }
            //获取Byte    
            ResponseByte = _stream.ToArray();
            _stream.Close();
            return ResponseByte;
        }


        /// <summary>    
        /// 4.0以下.net版本取数据使用    
        /// </summary>    
        /// <param name="streamResponse">流</param>    
        private MemoryStream GetMemoryStream(Stream streamResponse)
        {
            using (MemoryStream _stream = new MemoryStream())
            {
                int Length = 256;
                Byte[] buffer = new Byte[Length];
                int bytesRead = streamResponse.Read(buffer, 0, Length);
                while (bytesRead > 0)
                {
                    _stream.Write(buffer, 0, bytesRead);
                    bytesRead = streamResponse.Read(buffer, 0, Length);
                }
                return _stream;
            }
        }
        #endregion


        #region SetRequest  


        /// <summary>    
        /// 为请求准备参数    
        /// </summary>    
        ///<param name="item">参数列表</param>    
        private void SetRequest(HttpItem item)
        {
            // 验证证书    
            SetCer(item);
            //设置Header参数    
            if (item.Header != null && item.Header.Count > 0) foreach (string key in item.Header.AllKeys)
                {
                    request.Headers.Add(key, item.Header[key]);
                }
            // 设置代理    
            SetProxy(item);
            if (item.ProtocolVersion != null) request.ProtocolVersion = item.ProtocolVersion;
            request.ServicePoint.Expect100Continue = item.Expect100Continue;
            //请求方式Get或者Post或Put  
            request.Method = item.Method;
            request.Timeout = item.Timeout;
            request.KeepAlive = item.KeepAlive;
            request.ReadWriteTimeout = item.ReadWriteTimeout;
            if (item.IfModifiedSince != null) request.IfModifiedSince = Convert.ToDateTime(item.IfModifiedSince);
            //Accept    
            request.Accept = item.Accept;
            //ContentType返回类型    
            request.ContentType = item.ContentType;
            //UserAgent客户端的访问类型，包括浏览器版本和操作系统信息    
            request.UserAgent = item.UserAgent;
            // 编码    
            encoding = item.Encoding;
            //设置安全凭证    
            request.Credentials = item.ICredentials;
            //自动带入cookie  
            AutoCookies(item);
            //设置Cookie    
            SetCookie(item);
            //来源地址    
            request.Referer = item.Referer;
            //是否执行跳转功能    
            request.AllowAutoRedirect = item.Allowautoredirect;
            if (item.MaximumAutomaticRedirections > 0)
            {
                request.MaximumAutomaticRedirections = item.MaximumAutomaticRedirections;
            }
            //设置Post数据    
            SetPostData(item);
            //设置最大连接    
            if (item.Connectionlimit > 0) request.ServicePoint.ConnectionLimit = item.Connectionlimit;
        }
        /// <summary>    
        /// 设置证书    
        /// </summary>    
        /// <param name="item"></param>    
        private void SetCer(HttpItem item)
        {
            if (!string.IsNullOrEmpty(item.CerPath))
            {
                //这一句一定要写在创建连接的前面。使用回调的方法进行证书验证。    
                ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
                //初始化对像，并设置请求的URL地址    
                request = (HttpWebRequest)WebRequest.Create(item.URL);
                SetCerList(item);
                //将证书添加到请求里    
                request.ClientCertificates.Add(new X509Certificate(item.CerPath));
            }
            else
            {
                //初始化对像，并设置请求的URL地址    
                request = (HttpWebRequest)WebRequest.Create(item.URL);
                SetCerList(item);
            }
        }
        /// <summary>    
        /// 设置多个证书    
        /// </summary>    
        /// <param name="item"></param>    
        private void SetCerList(HttpItem item)
        {
            if (item.ClentCertificates != null && item.ClentCertificates.Count > 0)
            {
                foreach (X509Certificate c in item.ClentCertificates)
                {
                    request.ClientCertificates.Add(c);
                }
            }
        }
        /// <summary>    
        /// 设置Cookie    
        /// </summary>    
        /// <param name="item">Http参数</param>    
        private void SetCookie(HttpItem item)
        {
            if (!string.IsNullOrEmpty(item.Cookie)) request.Headers[HttpRequestHeader.Cookie] = item.Cookie;
            request.CookieContainer = new CookieContainer();
            if (item.CookieCollection != null && item.CookieCollection.Count > 0)
                request.CookieContainer.Add(item.CookieCollection);
        }
        /// <summary>    
        /// 设置Post数据    
        /// </summary>    
        /// <param name="item">Http参数</param>    
        private void SetPostData(HttpItem item)
        {
            //验证在得到结果时是否有传入数据    
            if (request.Method.Trim().ToLower().Contains("post")|| request.Method.Trim().ToLower().Contains("put"))
            {
                if (item.PostEncoding != null)
                {
                    postencoding = item.PostEncoding;
                }
                byte[] buffer = null;
                //写入Byte类型    
                if (item.PostDataType == PostDataType.Byte && item.PostdataByte != null && item.PostdataByte.Length > 0)
                {
                    //验证在得到结果时是否有传入数据    
                    buffer = item.PostdataByte;
                }//写入文件    
                else if (item.PostDataType == PostDataType.FilePath && !string.IsNullOrEmpty(item.Postdata))
                {
                    StreamReader r = new StreamReader(item.Postdata, postencoding);
                    buffer = postencoding.GetBytes(r.ReadToEnd());
                    r.Close();
                } //写入字符串    
                else if (!string.IsNullOrEmpty(item.Postdata))
                {
                    buffer = postencoding.GetBytes(item.Postdata);
                }
                if (buffer != null)
                {
                    request.ContentLength = buffer.Length;
                    request.GetRequestStream().Write(buffer, 0, buffer.Length);
                }
            }
        }
        /// <summary>    
        /// 设置代理    
        /// </summary>    
        /// <param name="item">参数对象</param>    
        private void SetProxy(HttpItem item)
        {
            bool isIeProxy = false;
            if (!string.IsNullOrEmpty(item.ProxyIp))
            {
                isIeProxy = item.ProxyIp.ToLower().Contains("ieproxy");
            }
            if (!string.IsNullOrEmpty(item.ProxyIp) && !isIeProxy)
            {
                //设置代理服务器    
                if (item.ProxyIp.Contains(":"))
                {
                    string[] plist = item.ProxyIp.Split(':');
                    WebProxy myProxy = new WebProxy(plist[0].Trim(), Convert.ToInt32(plist[1].Trim()));
                    //建议连接    
                    myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd);
                    //给当前请求对象    
                    request.Proxy = myProxy;
                }
                else
                {
                    WebProxy myProxy = new WebProxy(item.ProxyIp, false);
                    //建议连接    
                    myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd);
                    //给当前请求对象    
                    request.Proxy = myProxy;
                }
            }
            else if (isIeProxy)
            {
                //设置为IE代理    
            }
            else
            {
                request.Proxy = null;
            }
        }
        #endregion


        #region private main  
        /// <summary>    
        /// 回调验证证书问题    
        /// </summary>    
        /// <param name="sender">流对象</param>    
        /// <param name="certificate">证书</param>    
        /// <param name="chain">X509Chain</param>    
        /// <param name="errors">SslPolicyErrors</param>    
        /// <returns>bool</returns>    
        private bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; }
        #endregion
    }
    /// <summary>    
    /// Http请求参考类    
    /// </summary>    
    public class HttpItem
    {
        string _URL = string.Empty;
        /// <summary>    
        /// 请求URL必须填写    
        /// </summary>    
        public string URL
        {
            get { return _URL; }
            set { _URL = value; }
        }
        string _Method = "GET";
        /// <summary>    
        /// 请求方式默认为GET方式,当为POST方式时必须设置Postdata的值    
        /// </summary>    
        public string Method
        {
            get { return _Method; }
            set { _Method = value; }
        }
        int _Timeout = 300000;
        /// <summary>    
        /// 默认请求超时时间    
        /// </summary>    
        public int Timeout
        {
            get { return _Timeout; }
            set { _Timeout = value; }
        }
        int _ReadWriteTimeout = 30000;
        /// <summary>    
        /// 默认写入Post数据超时间    
        /// </summary>    
        public int ReadWriteTimeout
        {
            get { return _ReadWriteTimeout; }
            set { _ReadWriteTimeout = value; }
        }
        Boolean _KeepAlive = true;
        /// <summary>    
        ///  获取或设置一个值，该值指示是否与 Internet 资源建立持久性连接默认为true。    
        /// </summary>    
        public Boolean KeepAlive
        {
            get { return _KeepAlive; }
            set { _KeepAlive = value; }
        }
        string _Accept = "text/html, application/xhtml+xml, */*";
        /// <summary>    
        /// 请求标头值 默认为text/html, application/xhtml+xml, */*    
        /// </summary>    
        public string Accept
        {
            get { return _Accept; }
            set { _Accept = value; }
        }
        string _ContentType = "text/html";
        /// <summary>    
        /// 请求返回类型默认 text/html    
        /// </summary>    
        public string ContentType
        {
            get { return _ContentType; }
            set { _ContentType = value; }
        }

        string _UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";
        /// <summary>    
        /// 客户端访问信息默认Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)    
        /// </summary>    
        public string UserAgent
        {
            get { return _UserAgent; }
            set { _UserAgent = value; }
        }
        Encoding _Encoding = null;
        /// <summary>    
        /// 返回数据编码默认为NUll,可以自动识别,一般为utf-8,gbk,gb2312    
        /// </summary>    
        public Encoding Encoding
        {
            get { return _Encoding; }
            set { _Encoding = value; }
        }
        private PostDataType _PostDataType = PostDataType.String;
        /// <summary>    
        /// Post的数据类型    
        /// </summary>    
        public PostDataType PostDataType
        {
            get { return _PostDataType; }
            set { _PostDataType = value; }
        }
        string _Postdata = string.Empty;
        /// <summary>    
        /// Post请求时要发送的字符串Post数据    
        /// </summary>    
        public string Postdata
        {
            get { return _Postdata; }
            set { _Postdata = value; }
        }
        private byte[] _PostdataByte = null;
        /// <summary>    
        /// Post请求时要发送的Byte类型的Post数据    
        /// </summary>    
        public byte[] PostdataByte
        {
            get { return _PostdataByte; }
            set { _PostdataByte = value; }
        }
        private WebProxy _WebProxy;
        /// <summary>    
        /// 设置代理对象，不想使用IE默认配置就设置为Null，而且不要设置ProxyIp    
        /// </summary>    
        public WebProxy WebProxy
        {
            get { return _WebProxy; }
            set { _WebProxy = value; }
        }


        CookieCollection cookiecollection = null;
        /// <summary>    
        /// Cookie对象集合    
        /// </summary>    
        public CookieCollection CookieCollection
        {
            get { return cookiecollection; }
            set { cookiecollection = value; }
        }
        string _Cookie = string.Empty;
        /// <summary>    
        /// 请求时的Cookie    
        /// </summary>    
        public string Cookie
        {
            get { return _Cookie; }
            set { _Cookie = value; }
        }
        string _Referer = string.Empty;
        /// <summary>    
        /// 来源地址，上次访问地址    
        /// </summary>    
        public string Referer
        {
            get { return _Referer; }
            set { _Referer = value; }
        }
        string _CerPath = string.Empty;
        /// <summary>    
        /// 证书绝对路径    
        /// </summary>    
        public string CerPath
        {
            get { return _CerPath; }
            set { _CerPath = value; }
        }
        private Boolean isToLower = false;
        /// <summary>    
        /// 是否设置为全文小写，默认为不转化    
        /// </summary>    
        public Boolean IsToLower
        {
            get { return isToLower; }
            set { isToLower = value; }
        }
        private Boolean allowautoredirect = false;
        /// <summary>    
        /// 支持跳转页面，查询结果将是跳转后的页面，默认是不跳转    
        /// </summary>    
        public Boolean Allowautoredirect
        {
            get { return allowautoredirect; }
            set { allowautoredirect = value; }
        }
        private int connectionlimit = 1024;
        /// <summary>    
        /// 最大连接数    
        /// </summary>    
        public int Connectionlimit
        {
            get { return connectionlimit; }
            set { connectionlimit = value; }
        }
        private string proxyusername = string.Empty;
        /// <summary>    
        /// 代理Proxy 服务器用户名    
        /// </summary>    
        public string ProxyUserName
        {
            get { return proxyusername; }
            set { proxyusername = value; }
        }
        private string proxypwd = string.Empty;
        /// <summary>    
        /// 代理 服务器密码    
        /// </summary>    
        public string ProxyPwd
        {
            get { return proxypwd; }
            set { proxypwd = value; }
        }
        private string proxyip = string.Empty;
        /// <summary>    
        /// 代理 服务IP ,如果要使用IE代理就设置为ieproxy    
        /// </summary>    
        public string ProxyIp
        {
            get { return proxyip; }
            set { proxyip = value; }
        }
        private ResultType resulttype = ResultType.String;
        /// <summary>    
        /// 设置返回类型String和Byte    
        /// </summary>    
        public ResultType ResultType
        {
            get { return resulttype; }
            set { resulttype = value; }
        }
        private WebHeaderCollection header = new WebHeaderCollection();
        /// <summary>    
        /// header对象    
        /// </summary>    
        public WebHeaderCollection Header
        {
            get { return header; }
            set { header = value; }
        }


        private Version _ProtocolVersion;


        /// <summary>    
        //     获取或设置用于请求的 HTTP 版本。返回结果:用于请求的 HTTP 版本。默认为 System.Net.HttpVersion.Version11。    
        /// </summary>    
        public Version ProtocolVersion
        {
            get { return _ProtocolVersion; }
            set { _ProtocolVersion = value; }
        }
        private Boolean _expect100continue = true;
        /// <summary>    
        ///  获取或设置一个 System.Boolean 值，该值确定是否使用 100-Continue 行为。如果 POST 请求需要 100-Continue 响应，则为 true；否则为 false。默认值为 true。    
        /// </summary>    
        public Boolean Expect100Continue
        {
            get { return _expect100continue; }
            set { _expect100continue = value; }
        }
        private X509CertificateCollection _ClentCertificates;
        /// <summary>    
        /// 设置509证书集合    
        /// </summary>    
        public X509CertificateCollection ClentCertificates
        {
            get { return _ClentCertificates; }
            set { _ClentCertificates = value; }
        }
        private Encoding _PostEncoding;
        /// <summary>    
        /// 设置或获取Post参数编码,默认的为Default编码    
        /// </summary>    
        public Encoding PostEncoding
        {
            get { return _PostEncoding; }
            set { _PostEncoding = value; }
        }
        private ResultCookieType _ResultCookieType = ResultCookieType.CookieCollection;
        /// <summary>    
        /// Cookie返回类型,默认的是只返回字符串类型    
        /// </summary>    
        public ResultCookieType ResultCookieType
        {
            get { return _ResultCookieType; }
            set { _ResultCookieType = value; }
        }


        private ICredentials _ICredentials = CredentialCache.DefaultCredentials;
        /// <summary>    
        /// 获取或设置请求的身份验证信息。    
        /// </summary>    
        public ICredentials ICredentials
        {
            get { return _ICredentials; }
            set { _ICredentials = value; }
        }
        /// <summary>    
        /// 设置请求将跟随的重定向的最大数目    
        /// </summary>    
        private int _MaximumAutomaticRedirections;


        public int MaximumAutomaticRedirections
        {
            get { return _MaximumAutomaticRedirections; }
            set { _MaximumAutomaticRedirections = value; }
        }


        private DateTime? _IfModifiedSince = null;
        /// <summary>    
        /// 获取和设置IfModifiedSince，默认为当前日期和时间    
        /// </summary>    
        public DateTime? IfModifiedSince
        {
            get { return _IfModifiedSince; }
            set { _IfModifiedSince = value; }
        }


    }
    /// <summary>    
    /// Http返回参数类    
    /// </summary>    
    public class HttpResult
    {
        private string _Cookie;
        /// <summary>    
        /// Http请求返回的Cookie    
        /// </summary>    
        public string Cookie
        {
            get { return _Cookie; }
            set { _Cookie = value; }
        }


        private CookieCollection _CookieCollection;
        /// <summary>    
        /// Cookie对象集合    
        /// </summary>    
        public CookieCollection CookieCollection
        {
            get { return _CookieCollection; }
            set { _CookieCollection = value; }
        }
        private string _Html;
        /// <summary>    
        /// 返回的String类型数据 只有ResultType.String时才返回数据，其它情况为空    
        /// </summary>    
        public string Html
        {
            get { return _Html; }
            set { _Html = value; }
        }
        private byte[] _ResultByte;
        /// <summary>    
        /// 返回的Byte数组 只有ResultType.Byte时才返回数据，其它情况为空    
        /// </summary>    
        public byte[] ResultByte
        {
            get { return _ResultByte; }
            set { _ResultByte = value; }
        }
        private WebHeaderCollection _Header;
        /// <summary>    
        /// header对象    
        /// </summary>    
        public WebHeaderCollection Header
        {
            get { return _Header; }
            set { _Header = value; }
        }
        private string _StatusDescription;
        /// <summary>    
        /// 返回状态说明    
        /// </summary>    
        public string StatusDescription
        {
            get { return _StatusDescription; }
            set { _StatusDescription = value; }
        }
        private HttpStatusCode _StatusCode;
        /// <summary>    
        /// 返回状态码,默认为OK    
        /// </summary>    
        public HttpStatusCode StatusCode
        {
            get { return _StatusCode; }
            set { _StatusCode = value; }
        }


        //图片    
        public Image _image;


        public Image image
        {
            get { return _image; }
            set { _image = value; }
        }
    }
    /// <summary>    
    /// 返回类型    
    /// </summary>    
    public enum ResultType
    {
        /// <summary>    
        /// 表示只返回字符串 只有Html有数据    
        /// </summary>    
        String,
        /// <summary>    
        /// 表示返回字符串和字节流 ResultByte和Html都有数据返回    
        /// </summary>    
        Byte,
        /// <summary>    
        /// 返回图片    
        /// </summary>    
        Image
    }
    /// <summary>    
    /// Post的数据格式默认为string    
    /// </summary>    
    public enum PostDataType
    {
        /// <summary>    
        /// 字符串类型，这时编码Encoding可不设置    
        /// </summary>    
        String,
        /// <summary>    
        /// Byte类型，需要设置PostdataByte参数的值编码Encoding可设置为空    
        /// </summary>    
        Byte,
        /// <summary>    
        /// 传文件，Postdata必须设置为文件的绝对路径，必须设置Encoding的值    
        /// </summary>    
        FilePath
    }
    /// <summary>    
    /// Cookie返回类型    
    /// </summary>    
    public enum ResultCookieType
    {
        /// <summary>    
        /// 只返回字符串类型的Cookie    
        /// </summary>    
        String,
        /// <summary>    
        /// CookieCollection格式的Cookie集合同时也返回String类型的cookie    
        /// </summary>    
        CookieCollection
    }