/// <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;
     }
 }
 /// <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
     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;
     }
     //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;
     //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"))
     {
         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);
         }
     }
 }
 /// <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)HttpWebRequest.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)HttpWebRequest.Create(item.URL);
         SetCerList(item);
     }
 }
 /// <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 (System.Exception ex)
     {
         return new HttpResult() { Cookie = string.Empty, Header = null, Html = ex.Message, StatusDescription = "配置参数时出错:" + ex.Message };
     }
     try
     {
         #region 得到请求的response
         using (response = (HttpWebResponse)request.GetResponse())
         {
             result.StatusCode = response.StatusCode;
             result.StatusDescription = response.StatusDescription;
             result.Header = response.Headers;
             if (response.Cookies != null) result.CookieCollection = response.Cookies;
             if (response.Headers["set-cookie"] != null) result.Cookie = response.Headers["set-cookie"];
             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();
             }
             if (ResponseByte != null & ResponseByte.Length > 0)
             {
                 //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 = (meta.Groups.Count > 1) ? meta.Groups[2].Value.ToLower().Trim() : string.Empty;
                     if (c.Length > 2)
                     {
                         try
                         {
                             if (c.IndexOf(" ") > 0) c = c.Substring(0, c.IndexOf(" "));
                             encoding = Encoding.GetEncoding(c.Replace("\"", "").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);
                     }
                 }
                 //得到返回的HTML
                 result.Html = encoding.GetString(ResponseByte);
             }
             else
             {
                 //得到返回的HTML
                 result.Html = "本次请求并未返回任何数据";
             }
         }
         #endregion
     }
     catch (WebException ex)
     {
         //这里是在发生异常时返回的错误信息
         response = (HttpWebResponse)ex.Response;
         result.Html = ex.Message;
         if (response != null)
         {
             result.StatusCode = response.StatusCode;
             result.StatusDescription = response.StatusDescription;
         }
     }
     catch (System.Exception ex)
     {
         result.Html = ex.Message;
     }
     if (item.IsToLower) result.Html = result.Html.ToLower();
     return result;
 }