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C#HttpHelper爬虫类源码分享--苏飞版

简介: C#HttpHelper实现了C#HttpWebRequest抓取时无视编码,无视证书,无视Cookie,并且实现的代理的功能,使用它您可以进行Get和Post请求,可以很方便 的设置Cookie,证书,代理,编码问题您不用管,因为类会自动为您识别网页的编码。
+关注继续查看

介绍

  C#HttpHelper实现了C#HttpWebRequest抓取时无视编码,无视证书,无视Cookie,并且实现的代理的功能,使用它您可以进行Get和Post请求,可以很方便 的设置Cookie,证书,代理,编码问题您不用管,因为类会自动为您识别网页的编码。
   这个类是我以前写百度,Google,Soso,Sogou等网络蜘蛛时使用的,经过上千万个网站的测试,上万个网站抓取的例子总结出来的,中间的方法也是我实验了很久之后方案,所以大家可以放心使用。

    我不敢说100%,但是应该是99%的网站都没有问题,

都可以无视编码,证书,和Cookie,如果你确实发现那个网站在使用本类过程中有问题,出现乱码,或者是获取不了,不能带Cookie,不能带证书等问题,我非常乐意您能联系我,提出您的问题,您也可以直接回复本帖子,我会第一时间进行解答。
本类永久开源免费,万能框架,只是使用Httphelper类写出来的一个作品,和类本身没有关系,大家不会误会哦! Httphelper类是免费的,收费的是使用Httphelper类写出的万能框架!

Httphelper类源码下载:http://www.sufeinet.com/thread-3-1-1.html
Httphelper类在线代码生成器:http://www.sufeinet.com/thread-3690-1-1.html
Httphelper类原理:http://www.sufeinet.com/thread-6-1-1.html
Httphelper类教程:http://www.sufeinet.com/forum.ph ... action=view&ctid=23
Httphelper类例子:http://www.sufeinet.com/forum.ph ... action=view&ctid=22
HttpCookieHelper帮助类:http://www.sufeinet.com/thread-2382-1-1.html
Httphelper头信息(ContentType)默认为text/html无懈可击

2.在webBrowser中取Cookie的方法
在很多情况下我们会使用间进程的webBrowser去实现一些网页的请求和抓去,这个时候有部分网页是取不到Cookie的,那怎么办呢?下面我提供一个方法,应该99%的都能取到,


//取当前webBrowser登录后的Cookie值   
        [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref int pcchCookieData, int dwFlags, object lpReserved);
        //取出Cookie,当登录后才能取    
        private static string GetCookieString(string url)
        {
            // Determine the size of the cookie      
            int datasize = 256;
            StringBuilder cookieData = new StringBuilder(datasize);
            if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, null))
            {
                if (datasize < 0)
                    return null;
                // Allocate stringbuilder large enough to hold the cookie    
                cookieData = new StringBuilder(datasize);
                if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, null))
                    return null;
            }
            return cookieData.ToString();
        }```  
**3.去掉所有的Html代码**

///

    /// 过滤html标签
    /// </summary>
    /// <param name="strHtml">html的内容</param>
    /// <returns></returns>
    public static string StripHTML(string stringToStrip)
    {
        // paring using RegEx           //
        stringToStrip = Regex.Replace(stringToStrip, "</p(?:\\s*)>(?:\\s*)<p(?:\\s*)>", "\n\n", RegexOptions.IgnoreCase | RegexOptions.Compiled);
        stringToStrip = Regex.Replace(stringToStrip, "", "\n", RegexOptions.IgnoreCase | RegexOptions.Compiled);
        stringToStrip = Regex.Replace(stringToStrip, "\"", "''", RegexOptions.IgnoreCase | RegexOptions.Compiled);
        stringToStrip = StripHtmlXmlTags(stringToStrip);
        return stringToStrip;
    }
    private static string StripHtmlXmlTags(string content)
    {
        return Regex.Replace(content, "<[^>]+>", "", RegexOptions.IgnoreCase | RegexOptions.Compiled);
    }```  

方法如上面所示直接调用StripHTML方法就行了
4.设置URl格式的问题


public static string URLDecode(string text)
       {
           return HttpUtility.UrlDecode(text, Encoding.Default);
       }
       public static string URLEncode(string text)
       {
           return HttpUtility.UrlEncode(text, Encoding.Default);
       }```  
**5.HttpHelper类使用方法**

HttpHelper http = new HttpHelper();

        HttpItem item = new HttpItem()
        {
            URL = "http://www.sufeinet.com",//URL     必需项
            Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
            //Encoding = Encoding.Default,
            Method = "get",//URL     可选项 默认为Get
            Timeout = 100000,//连接超时时间     可选项默认为100000
            ReadWriteTimeout = 30000,//写入Post数据超时时间     可选项默认为30000
            IsToLower = false,//得到的HTML代码是否转成小写     可选项默认转小写
            Cookie = "",//字符串Cookie     可选项
            UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",//用户的浏览器类型,版本,操作系统     可选项有默认值
            Accept = "text/html, application/xhtml+xml, */*",//    可选项有默认值
            ContentType = "text/html",//返回类型    可选项有默认值
            Referer = "http://www.sufeinet.com",//来源URL     可选项
            Allowautoredirect = true,//是否根据301跳转     可选项
            CerPath = "d:\\123.cer",//证书绝对路径     可选项不需要证书时可以不写这个参数
            Connectionlimit = 1024,//最大连接数     可选项 默认为1024
            Postdata = "C:\\PERKYSU_20121129150608_ScrubLog.txt",//Post数据     可选项GET时不需要写
            PostDataType = PostDataType.FilePath,//默认为传入String类型,也可以设置PostDataType.Byte传入Byte类型数据
            ProxyIp = "192.168.1.105:8015",//代理服务器ID 端口可以直接加到后面以:分开就行了    可选项 不需要代理 时可以不设置这三个参数
            ProxyPwd = "123456",//代理服务器密码     可选项
            ProxyUserName = "administrator",//代理服务器账户名     可选项
            ResultType = ResultType.Byte,//返回数据类型,是Byte还是String
            PostdataByte = System.Text.Encoding.Default.GetBytes("测试一下"),//如果PostDataType为Byte时要设置本属性的值
            CookieCollection = new System.Net.CookieCollection(),//可以直接传一个Cookie集合进来
        };
        item.Header.Add("测试Key1", "测试Value1");
        item.Header.Add("测试Key2", "测试Value2");
        //得到HTML代码
        HttpResult result = http.GetHtml(item);
        //取出返回的Cookie
        string cookie = result.Cookie;
        //返回的Html内容
        string html = result.Html;
        if (result.StatusCode == System.Net.HttpStatusCode.OK)
        {
            //表示访问成功,具体的大家就参考HttpStatusCode类
        }
        //表示StatusCode的文字说明与描述
        string statusCodeDescription = result.StatusDescription;
        //把得到的Byte转成图片
        Image img = byteArrayToImage(result.ResultByte);
    }
    /// <summary>
    /// 字节数组生成图片
    /// </summary>
    /// <param name="Bytes">字节数组</param>
    /// <returns>图片</returns>

private Image byteArrayToImage(byte[] Bytes)

    {
            MemoryStream ms = new MemoryStream(Bytes);
            Image outputImg = Image.FromStream(ms);
            return outputImg;
    }}```  

本例子是一个统一的标准写法,大家可以根据需要自行修改,在下面还会有对特定功能的说明请大家继续看
6.最简单的Post与Get的写法


HttpHelper http = new HttpHelper();
           HttpItem item = new HttpItem()
           {
               URL = "http://www.sufeinet.com",//URL这里都是测试     必需项
               Method = "get",//URL     可选项 默认为Get
           };
           //得到HTML代码
           HttpResult result = http.GetHtml(item);
           item = new HttpItem()
          {
              URL = "http://tool.sufeinet.com",//URL这里都是测试URl   必需项
              Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
              //Encoding = Encoding.Default,
              Method = "post",//URL     可选项 默认为Get
              Postdata = "user=123123&pwd=1231313"
          };
           //得到新的HTML代码
           result = http.GetHtml(item);```  


**7.HttpHelper设置Header参考的方法**

HttpHelper http = new HttpHelper();

      HttpItem item = new HttpItem()
      {
          URL = "http://www.sufeinet.com",//URL     必需项
          Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
           //Encoding = Encoding.Default,
          Method = "get",//URL     可选项 默认为Get
      };
      item.Header.Add("测试Key1", "测试Value1");
      item.Header.Add("测试Key2", "测试Value2");
      //得到HTML代码
      HttpResult result = http.GetHtml(item);
      //取出返回的Cookie
      string cookie = result.Cookie;
      //返回的Html内容
      string html = result.Html;
      if (result.StatusCode == System.Net.HttpStatusCode.OK)
      {
          //表示访问成功,具体的大家就参考HttpStatusCode类
      }
      //表示StatusCode的文字说明与描述
      string statusCodeDescription = result.StatusDescription;```  

下面我列出一些不能直接Add的参数
8.HttpHelper获取图片的方式


HttpHelper http = new HttpHelper();
          HttpItem item = new HttpItem()
          {
              URL = "http://www.sufeinet.com",//URL     必需项
              Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
              //Encoding = Encoding.Default,
              ResultType = ResultType.Byte
          };
          //得到HTML代码
          HttpResult result = http.GetHtml(item);
          if (result.StatusCode == System.Net.HttpStatusCode.OK)
          {
              //表示访问成功,具体的大家就参考HttpStatusCode类
          }
          //表示StatusCode的文字说明与描述
          string statusCodeDescription = result.StatusDescription;
          //把得到的Byte转成图片
          Image img = byteArrayToImage(result.ResultByte);
      }
 
      /// <summary>
      /// 字节数组生成图片
      /// </summary>
      /// <param name="Bytes">字节数组</param>
      /// <returns>图片</returns>
      private Image byteArrayToImage(byte[] Bytes)
      {
              MemoryStream ms = new MemoryStream(Bytes);
              Image outputImg = Image.FromStream(ms);
              return outputImg;
      }```  
**9.二次或多次使用Cookie的方式**
字符串Cookie

HttpHelper http = new HttpHelper();

      HttpItem item = new HttpItem()
      {
          URL = "http://www.sufeinet.com",//URL这里都是测试     必需项
          Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
          //Encoding = Encoding.Default,
          Method = "get",//URL     可选项 默认为Get
      };
      //得到HTML代码
      HttpResult result = http.GetHtml(item);
      item = new HttpItem()
     {
         URL = "http://tool.sufeinet.com",//URL这里都是测试URl   必需项
         Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
         //Encoding = Encoding.Default,
         Method = "get",//URL     可选项 默认为Get
         Cookie = result.Cookie,
     };
      //得到新的HTML代码
      result = http.GetHtml(item);```  

CookieCollection类型的Cookie使用方法


HttpHelper http = new HttpHelper();
           HttpItem item = new HttpItem()
           {
               URL = "http://www.sufeinet.com",//URL这里都是测试     必需项
               Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
               //Encoding = Encoding.Default,
               Method = "get",//URL     可选项 默认为Get
               ResultCookieType = ResultCookieType.CookieCollection
           };
           //得到HTML代码
           HttpResult result = http.GetHtml(item);
           item = new HttpItem()
           {
               URL = "http://tool.sufeinet.com",//URL这里都是测试URl   必需项
               Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
               //Encoding = Encoding.Default,
               Method = "get",//URL     可选项 默认为Get
               CookieCollection = result.CookieCollection,
               ResultCookieType = ResultCookieType.CookieCollection
           };
           //得到新的HTML代码
           result = http.GetHtml(item);```  
全部源码如下

///
/// 类说明:HttpHelper类,用来实现Http访问,Post或者Get方式的,直接访问,带Cookie的,带证书的等方式,可以设置代理
/// 重要提示:请不要自行修改本类,如果因为你自己修改后将无法升级到新版本。如果确实有什么问题请到官方网站提建议,
/// 我们一定会及时修改
/// 编码日期:2011-09-20
/// 编 码 人:苏飞
/// 联系方式:361983679
/// 官方网址:http://www.sufeinet.com/thread-3-1-1.html
/// 修改日期:2018-11-06
/// 版 本 号:1.9.9
///
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.Linq;
using System.Net.Cache;

namespace SufeiUtil
{

/// <summary>
/// Http连接操作帮助类
/// </summary>
public class HttpHelper
{
    #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;
    //设置本地的出口ip和端口
    private IPEndPoint _IPEndPoint = null;
    #endregion

    #region Public

    /// <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)
        {
            //配置参数时出错
            return new HttpResult() { Cookie = string.Empty, Header = null, Html = ex.Message, StatusDescription = "配置参数时出错:" + ex.Message };
        }
        try
        {
            //请求数据
            using (response = (HttpWebResponse)request.GetResponse())
            {
                GetData(item, result);
            }
        }
        catch (WebException ex)
        {
            if (ex.Response != null)
            {
                using (response = (HttpWebResponse)ex.Response)
                {
                    GetData(item, result);
                }
            }
            else
            {
                result.Html = ex.Message;
            }
        }
        catch (Exception ex)
        {
            result.Html = ex.Message;
        }
        if (item.IsToLower) result.Html = result.Html.ToLower();
        //重置request,response为空
        if (item.IsReset)
        {
            request = null;
            response = null;
        }
        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)
    {
        if (response == null)
        {
            return;
        }
        #region base
        //获取StatusCode
        result.StatusCode = response.StatusCode;
        //获取StatusDescription
        result.StatusDescription = response.StatusDescription;
        //获取Headers
        result.Header = response.Headers;
        //获取最后访问的URl
        result.ResponseUri = response.ResponseUri.ToString();
        //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 (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;
        using (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
                new GZipStream(response.GetResponseStream(), CompressionMode.Decompress).CopyTo(_stream, 10240);
            }
            else
            {
                //开始读取流并设置编码方式
                response.GetResponseStream().CopyTo(_stream, 10240);
            }
            //获取Byte
            ResponseByte = _stream.ToArray();
        }
        return ResponseByte;
    }
    #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);
        if (item.IPEndPoint != null)
        {
            _IPEndPoint = item.IPEndPoint;
            //设置本地的出口ip和端口
            request.ServicePoint.BindIPEndPointDelegate = new BindIPEndPoint(BindIPEndPointCallback);
        }
        //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
        request.Method = item.Method;
        request.Timeout = item.Timeout;
        request.KeepAlive = item.KeepAlive;
        request.ReadWriteTimeout = item.ReadWriteTimeout;
        if (!string.IsNullOrWhiteSpace(item.Host))
        {
            request.Host = item.Host;
        }
        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;
        //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.IsNullOrWhiteSpace(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;
        //设置CookieCollection
        if (item.ResultCookieType == ResultCookieType.CookieCollection)
        {
            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("get"))
        {
            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.IsNullOrWhiteSpace(item.Postdata))
            {
                StreamReader r = new StreamReader(item.Postdata, postencoding);
                buffer = postencoding.GetBytes(r.ReadToEnd());
                r.Close();
            } //写入字符串
            else if (!string.IsNullOrWhiteSpace(item.Postdata))
            {
                buffer = postencoding.GetBytes(item.Postdata);
            }
            if (buffer != null)
            {
                request.ContentLength = buffer.Length;
                request.GetRequestStream().Write(buffer, 0, buffer.Length);
            }
            else
            {
                request.ContentLength = 0;
            }
        }
    }
    /// <summary>
    /// 设置代理
    /// </summary>
    /// <param name="item">参数对象</param>
    private void SetProxy(HttpItem item)
    {
        bool isIeProxy = false;
        if (!string.IsNullOrWhiteSpace(item.ProxyIp))
        {
            isIeProxy = item.ProxyIp.ToLower().Contains("ieproxy");
        }
        if (!string.IsNullOrWhiteSpace(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 = item.WebProxy;
        }
    }
    #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; }

    /// <summary>
    /// 通过设置这个属性,可以在发出连接的时候绑定客户端发出连接所使用的IP地址。 
    /// </summary>
    /// <param name="servicePoint"></param>
    /// <param name="remoteEndPoint"></param>
    /// <param name="retryCount"></param>
    /// <returns></returns>
    private IPEndPoint BindIPEndPointCallback(ServicePoint servicePoint, IPEndPoint remoteEndPoint, int retryCount)
    {
        return _IPEndPoint;//端口号
    }
    #endregion
}

#region public calss
/// <summary>
/// Http请求参考类
/// </summary>
public class HttpItem
{
    /// <summary>
    /// 请求URL必须填写
    /// </summary>
    public string URL { get; set; }
    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 = 100000;
    /// <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; }
    }
    /// <summary>
    /// 设置Host的标头信息
    /// </summary>
    public string Host { get; set; }
    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; }
    }
    /// <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; set; }
    private PostDataType _PostDataType = PostDataType.String;
    /// <summary>
    /// Post的数据类型
    /// </summary>
    public PostDataType PostDataType
    {
        get { return _PostDataType; }
        set { _PostDataType = value; }
    }
    /// <summary>
    /// Post请求时要发送的字符串Post数据
    /// </summary>
    public string Postdata { get; set; }
    /// <summary>
    /// Post请求时要发送的Byte类型的Post数据
    /// </summary>
    public byte[] PostdataByte { get; set; }
    /// <summary>
    /// Cookie对象集合
    /// </summary>
    public CookieCollection CookieCollection { get; set; }
    /// <summary>
    /// 请求时的Cookie
    /// </summary>
    public string Cookie { get; set; }
    /// <summary>
    /// 来源地址,上次访问地址
    /// </summary>
    public string Referer { get; set; }
    /// <summary>
    /// 证书绝对路径
    /// </summary>
    public string CerPath { get; set; }
    /// <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; set; }
    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; }
    }
    /// <summary>
    /// 代理Proxy 服务器用户名
    /// </summary>
    public string ProxyUserName { get; set; }
    /// <summary>
    /// 代理 服务器密码
    /// </summary>
    public string ProxyPwd { get; set; }
    /// <summary>
    /// 代理 服务IP,如果要使用IE代理就设置为ieproxy
    /// </summary>
    public string ProxyIp { get; set; }
    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; }
    }
    /// <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; set; }
    private Boolean _expect100continue = false;
    /// <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; }
    }
    /// <summary>
    /// 设置509证书集合
    /// </summary>
    public X509CertificateCollection ClentCertificates { get; set; }
    /// <summary>
    /// 设置或获取Post参数编码,默认的为Default编码
    /// </summary>
    public Encoding PostEncoding { get; set; }
    private ResultCookieType _ResultCookieType = ResultCookieType.String;
    /// <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>
    public int MaximumAutomaticRedirections { get; set; }
    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; }
    }
    #region ip-port
    private IPEndPoint _IPEndPoint = null;
    /// <summary>
    /// 设置本地的出口ip和端口
    /// </summary>]
    /// <example>
    ///item.IPEndPoint = new IPEndPoint(IPAddress.Parse("192.168.1.1"),80);
    /// </example>
    public IPEndPoint IPEndPoint
    {
        get { return _IPEndPoint; }
        set { _IPEndPoint = value; }
    }
    #endregion

    private bool _isReset = false;
    /// <summary>
    /// 是否重置request,response的值,默认不重置,当设置为True时request,response将被设置为Null
    /// </summary>
    public bool IsReset
    {
        get { return _isReset; }
        set { _isReset = value; }
    }
}
/// <summary>
/// Http返回参数类
/// </summary>
public class HttpResult
{
    /// <summary>
    /// Http请求返回的Cookie
    /// </summary>
    public string Cookie { get; set; }
    /// <summary>
    /// Cookie对象集合
    /// </summary>
    public CookieCollection CookieCollection { get; set; }
    private string _html = string.Empty;
    /// <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; }
    }
    /// <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; set; }
    /// <summary>
    /// header对象
    /// </summary>
    public WebHeaderCollection Header { get; set; }
    /// <summary>
    /// 返回状态说明
    /// </summary>
    public string StatusDescription { get; set; }
    /// <summary>
    /// 返回状态码,默认为OK
    /// </summary>
    public HttpStatusCode StatusCode { get; set; }
    /// <summary>
    /// 最后访问的URl
    /// </summary>
    public string ResponseUri { get; set; }
    /// <summary>
    /// 获取重定向的URl
    /// </summary>
    public string RedirectUrl
    {
        get
        {
            try
            {
                if (Header != null && Header.Count > 0)
                {
                    if (Header.AllKeys.Any(k => k.ToLower().Contains("location")))
                    {
                        string baseurl = Header["location"].ToString().Trim();
                        string locationurl = baseurl.ToLower();
                        if (!string.IsNullOrWhiteSpace(locationurl))
                        {
                            bool b = locationurl.StartsWith("http://") || locationurl.StartsWith("https://");
                            if (!b)
                            {
                                baseurl = new Uri(new Uri(ResponseUri), baseurl).AbsoluteUri;
                            }
                        }
                        return baseurl;
                    }
                }
            }
            catch { }
            return string.Empty;
        }
    }
}
/// <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>
/// 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
}
#endregion

}`

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