C# : HttpWebResponse 无法获取cookie的解决办法-

文章来源:http://www.cnblogs.com/Fooo/archive/2010/10/13/1850179.html

排除浏览器等其他因素，只考虑程序的问题，

基本上是因为没在 HttpWebRequest.GetResponse 之前先对 request 的 CookieContainer 实例化

简单代码如下：

                HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(Url);
                
                myRequest.CookieContainer =  new CookieContainer();

                HttpWebResponse response = (HttpWebResponse)myRequest.GetResponse();
                string _APSNET_SessionValue = response.Cookies["ASP.NET_SessionId"].Value;

如果没在 GetResponse 之前实例化 myRequest.CookieContainer,
访问 response.Cookies ， 都是空的。

 

//**********************************

代码

using  System;
using  System.Collections.Generic;
using  System.IO;
using  System.Net;
using  System.Text;

using  System.Text.RegularExpressions;
namespace  MatchWin
{
     ///   <summary>  
     ///   Http操作类 
     ///   </summary>  
     public   static   class  httptest
    {
         ///   <summary>  
         ///   获取网址HTML 
         ///   </summary>  
         ///   <param name="URL"> 网址  </param>  
         ///   <returns>   </returns>  
         public   static   string  GetHtml( string  URL)
        {
            WebRequest wrt;
            wrt  =  WebRequest.Create(URL);
            wrt.Credentials  =  CredentialCache.DefaultCredentials;
            WebResponse wrp;
            wrp  =  wrt.GetResponse();
             string  reader  =   new  StreamReader(wrp.GetResponseStream(), Encoding.GetEncoding( " gb2312 " )).ReadToEnd();
             try
            {
                wrt.GetResponse().Close();
            }
             catch  (WebException ex)
            {
                 throw  ex;
            }
             return  reader;
        }
         ///   <summary>  
         ///  获取网站cookie 
         ///   </summary>  
         ///   <param name="URL"> 网址  </param>  
         ///   <param name="cookie"> cookie  </param>  
         ///   <returns>   </returns>  
         public   static   string  GetHtml( string  URL,  out   string  cookie)
        {
            WebRequest wrt;
            wrt  =  WebRequest.Create(URL);
            wrt.Credentials  =  CredentialCache.DefaultCredentials;
            WebResponse wrp;

            wrp  =  wrt.GetResponse();


             string  html  =   new  StreamReader(wrp.GetResponseStream(), Encoding.GetEncoding( " gb2312 " )).ReadToEnd();

             try
            {
                wrt.GetResponse().Close();
            }
             catch  (WebException ex)
            {
                 throw  ex;
            }

           cookie  =  wrp.Headers.Get( " Set-Cookie " );
            
             return  html;
        }
         public   static   string  GetHtml( string  URL,  string  postData,  string  cookie,  out   string  header,  string  server)
        {
            return  GetHtml(server, URL, postData, cookie,  out  header);
           
        }
         public   static   string  GetHtml( string  server,  string  URL,  string  postData,  string  cookie,  out   string  header)
        {
             byte [] byteRequest  =  Encoding.GetEncoding( " gb2312 " ).GetBytes(postData);
             return  GetHtml(server, URL, byteRequest, cookie,  out  header);
        }

         ///   <summary>
         ///  C# :从一段字符串中，输入开始和结束的字符，取中间的字符
         ///   </summary>
         ///   <param name="str"> 一段字符串 </param>
         ///   <param name="strStart"> 开始字符 </param>
         ///   <param name="strEnd"> 结束字符 </param>
         ///   <returns></returns>
         public   static   string  AnalyzeMessage( string  str,  string  strStart,  string  strEnd)
        {
             string  Result  =   "" ;
             int  i  =  str.IndexOf(strStart);
             if  (i  >=   0 )
            {
                 int  j  =  str.IndexOf(strEnd, i  +  strStart.Length);
                 if  (j  >   0 )
                {
                    Result  =  str.Substring(i  +  strStart.Length, j  -  i  -  strStart.Length);
                }
            }
             return  Result;
        }

         ///   <summary>
         ///  与请求相关的cookie（用于保持session）
         ///   </summary>
         public   static  CookieContainer LoginCookies  =   new  CookieContainer();
         public   static  CookieCollection gCookieCollention  =   new  CookieCollection();
         // Cookies集合保存
         public   static  CookieCollection CCol  =   new  CookieCollection();


         public   static   string  GetHtml222( string  URL,   string  cookie)
        {

            HttpWebRequest httpWebRequest;
            HttpWebResponse webResponse;
       
            Stream getStream;
            StreamReader streamReader;
             string  getString  =   "" ;
            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(URL);
                   
            httpWebRequest.ContentType  =   " application/x-www-form-urlencoded " ;
            httpWebRequest.Accept  =
                 " image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* " ;
            
            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;
       
             // 自动跳转。。。
            httpWebRequest.AllowAutoRedirect  =   false ;
            httpWebRequest.KeepAlive  =   true ;
            httpWebRequest.CookieContainer  =  LoginCookies;

            httpWebRequest.Method  =   " GET " ;
            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();

            

            getStream  =  webResponse.GetResponseStream();
            streamReader  =   new  StreamReader(getStream, Encoding.GetEncoding( " gb2312 " ));   // Encoding.GetEncoding("gb2312")    Encoding.GetEncoding("utf-8")
            getString  =  streamReader.ReadToEnd();

             // LoginCookies = httpWebRequest.CookieContainer;
            CCol  =  LoginCookies.GetCookies(httpWebRequest.RequestUri);
             // string ksfd = CCol[0].Name + CCol[0].Value;

            streamReader.Close();
            getStream.Close();



             // *********************************获取cookie
            Regex RegExFindHref  =   new  Regex( @" <a\s+([^>]*\s*)?href\s*=\s*(?:""(?<1>[/\a-z0-9_][^""]*)""|'(?<1>[/\a-z0-9_][^']*)'
|(?<1>[/\a-z0-9_]\S*))(\s[^>]*)?>(?<2>.*?)</a> " , RegexOptions.Singleline  |  RegexOptions.IgnoreCase  |  RegexOptions.Compiled);
             string  ht  =   "" ;
             for  (Match m  =  RegExFindHref.Match(getString); m.Success; m  =  m.NextMatch())
            {            
                  ht  =   " http://agt.ibc88.com "   +  System.Web.HttpUtility.UrlDecode(m.Groups[ 1 ].ToString());
            }
            ht  =  ht.Replace( " amp; " ,  "" );
            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(ht);
             /// /CookieContainer co = new CookieContainer();


            httpWebRequest.CookieContainer  =   new  CookieContainer();
             // httpWebRequest.CookieContainer.Add(new Uri(ht), "");

            httpWebRequest.ContentType  =   " application/x-www-form-urlencoded " ;
            httpWebRequest.Accept  =
                 " image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* " ;

            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;
            httpWebRequest.Method  =   " Get " ;
             // 自动跳转。。。
            httpWebRequest.Referer  =  URL;
           httpWebRequest.AllowAutoRedirect  =   false ;
            httpWebRequest.KeepAlive  =   true ;
            httpWebRequest.Credentials  =  CredentialCache.DefaultCredentials;
             // httpWebRequest.CookieContainer = LoginCookies;

            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();

            getStream  =  webResponse.GetResponseStream();
            streamReader  =   new  StreamReader(getStream, Encoding.GetEncoding( " gb2312 " ));
            getString  =  streamReader.ReadToEnd();

            cookie  =  webResponse.Headers.Get( " Set-Cookie " );

            streamReader.Close();
            getStream.Close();

            
             // *********************************************************************************************
             return  getString;
        }

         public   static   string  GetHtml555( string  URL,  string  cookie)
        {
             // WebRequest wrt;
             // wrt = WebRequest.Create(URL);
             // wrt.Credentials = CredentialCache.DefaultCredentials;
            
             // WebResponse wrp;
             // wrp = wrt.GetResponse();
             // string html = new StreamReader(wrp.GetResponseStream(), Encoding.GetEncoding("gb2312")).ReadToEnd();
             // try
             // {
             //     wrt.GetResponse().Close();
             // }
             // catch (WebException ex)
             // {
             //     throw ex;
             // }
             // cookie = wrp.Headers.Get("Set-Cookie");
             // ***********************************************************************

            HttpWebRequest httpWebRequest;
            HttpWebResponse webResponse;

            Stream getStream;
            StreamReader streamReader;
             string  getString  =   "" ;
            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(URL);
             // CookieContainer co = new CookieContainer();
             // co.SetCookies(new Uri(" https://ag.ibc88.com/ "), cookie);

            

            httpWebRequest.ContentType  =   " application/x-www-form-urlencoded " ;
            httpWebRequest.Accept  =
                 " image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* " ;

            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;
            httpWebRequest.Method  =   " Get " ;
             // 自动跳转。。。
            httpWebRequest.AllowAutoRedirect  =   false ;
            httpWebRequest.KeepAlive  =   true ;
            httpWebRequest.CookieContainer  =  LoginCookies;

            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();

            getStream  =  webResponse.GetResponseStream();
            streamReader  =   new  StreamReader(getStream, Encoding.GetEncoding( " gb2312 " ));
            getString  =  streamReader.ReadToEnd();

             // cookie = webResponse.Headers.Get("Set-Cookie");

            streamReader.Close();
            getStream.Close();
             return  getString;
        }


         public   static   string  GetHtml333( string  URL,  string  cookie,  string  urlReferer)
        {
            HttpWebRequest httpWebRequest;
            HttpWebResponse webResponse;

            Stream getStream;
            StreamReader streamReader;
             string  getString  =   "" ;
            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(URL);

               
            httpWebRequest.ContentType  =   " application/x-www-form-urlencoded " ;
            httpWebRequest.Accept  =
                 " image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* " ;

            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;
            httpWebRequest.Method  =   " Get " ;
             // 自动跳转。。。
            httpWebRequest.AllowAutoRedirect  =   false ;
            httpWebRequest.KeepAlive  =   true ;          

            httpWebRequest.CookieContainer  =  LoginCookies;          
            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();           

            getStream  =  webResponse.GetResponseStream();
            streamReader  =   new  StreamReader(getStream, Encoding.UTF8);
            getString  =  streamReader.ReadToEnd();

            streamReader.Close();
            getStream.Close();
             return  getString;
        }


         public   static   string  GetHtml( string  server,  string  URL,  byte [] byteRequest,  string  cookie,  out   string  header)
        {
            
             long  contentLength;
            HttpWebRequest httpWebRequest;
            HttpWebResponse webResponse;
            Stream getStream;
            StreamReader streamReader;

            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(URL);
            LoginCookies.SetCookies( new  Uri(server), cookie);
            httpWebRequest.CookieContainer  =  LoginCookies;    
       
            httpWebRequest.ContentType  =   " application/x-www-form-urlencoded " ;
            httpWebRequest.Accept  =
                 " image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* " ;
            httpWebRequest.Referer  =  server;
            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;
            httpWebRequest.Method  =   " Post " ;
            httpWebRequest.AllowAutoRedirect  =   false ;
            httpWebRequest.KeepAlive  =   true ;
            httpWebRequest.ContentLength  =  byteRequest.Length;
            Stream stream;
            stream  =  httpWebRequest.GetRequestStream();
            stream.Write(byteRequest,  0 , byteRequest.Length);
            stream.Close();
            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();
             int  _APSNET_SessionValue  =  webResponse.Cookies.Count;
            header  =  webResponse.Headers.ToString();
            getStream  =  webResponse.GetResponseStream();
            contentLength  =  webResponse.ContentLength;

             byte [] outBytes  =   new   byte [contentLength];
            outBytes  =  ReadFully(getStream);
            getStream.Close();

            getStream  =   new  MemoryStream(outBytes);
            streamReader  =   new  StreamReader(getStream, Encoding.GetEncoding( " gb2312 " ));
             string  getString  =  streamReader.ReadToEnd();
            streamReader.Close();
            getStream.Close();
                       

             // 第二段*********************
            Regex RegExFindHref  =   new  Regex( @" <a\s+([^>]*\s*)?href\s*=\s*(?:""(?<1>[/\a-z0-9_][^""]*)""|'(?<1>[/\a-z0-9_][^']*)'
|(?<1>[/\a-z0-9_]\S*))(\s[^>]*)?>(?<2>.*?)</a> " , RegexOptions.Singleline  |  RegexOptions.IgnoreCase  |  RegexOptions.Compiled);
             string  TwoStr  =   "" ;
             for  (Match m  =  RegExFindHref.Match(getString); m.Success; m  =  m.NextMatch())
            {
                TwoStr  =  m.Groups[ 1 ].ToString();
            }

            getString  =   "" ;
            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(TwoStr);

            httpWebRequest.ContentType  =   " application/x-www-form-urlencoded " ;
            httpWebRequest.Accept  =
                 " image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* " ;

            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;

             // 自动跳转。。。
            httpWebRequest.AllowAutoRedirect  =   false ;
            httpWebRequest.KeepAlive  =   true ;
            httpWebRequest.CookieContainer  =  LoginCookies;
            httpWebRequest.Method  =   " GET " ;
            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();
             _APSNET_SessionValue  =  webResponse.Cookies.Count;

            getStream  =  webResponse.GetResponseStream();
            streamReader  =   new  StreamReader(getStream, Encoding.GetEncoding( " gb2312 " ));   // Encoding.GetEncoding("gb2312")    Encoding.GetEncoding("utf-8")
            getString  =  streamReader.ReadToEnd();           
            streamReader.Close();
            getStream.Close();
            
             // *********************************获取cookie
            RegExFindHref  =   new  Regex( @" <a\s+([^>]*\s*)?href\s*=\s*(?:""(?<1>[/\a-z0-9_][^""]*)""|'(?<1>[/\a-z0-9_][^']*)'
|(?<1>[/\a-z0-9_]\S*))(\s[^>]*)?>(?<2>.*?)</a> " , RegexOptions.Singleline  |  RegexOptions.IgnoreCase  |  RegexOptions.Compiled);
             string  ht  =   "" ;
             for  (Match m  =  RegExFindHref.Match(getString); m.Success; m  =  m.NextMatch())
            {
                ht  =   " http://agt.ibc88.com "   +  System.Web.HttpUtility.UrlDecode(m.Groups[ 1 ].ToString());
            }
            ht  =  ht.Replace( " amp; " ,  "" );
            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(ht);          

            httpWebRequest.ContentType  =   " application/x-www-form-urlencoded " ;
            httpWebRequest.Accept  =
                 " image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* " ;
            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;
            httpWebRequest.Method  =   " Get " ;
             // 自动跳转。。。      
            httpWebRequest.AllowAutoRedirect  =   false ;
            httpWebRequest.KeepAlive  =   true ;           
            httpWebRequest.CookieContainer  =  LoginCookies;

            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();
            _APSNET_SessionValue  =  webResponse.Cookies.Count;

             string  sdfff  =  webResponse.Cookies[ 0 ].Name  +   " ： "   +  webResponse.Cookies[ 0 ].Value;

            getStream  =  webResponse.GetResponseStream();
            streamReader  =   new  StreamReader(getStream, Encoding.GetEncoding( " gb2312 " ));
            getString  =  streamReader.ReadToEnd();

            cookie  =  webResponse.Headers.Get( " Set-Cookie " );
            LoginCookies.SetCookies(httpWebRequest.RequestUri,  " rpt_bold=1;  "   +  cookie);

            streamReader.Close();
            getStream.Close();

             return  getString;
        }

         ///   <summary>  
         ///  Post模式浏览 
         ///   </summary>  
         ///   <param name="server"> 服务器地址  </param>  
         ///   <param name="URL"> 网址  </param>  
         ///   <param name="byteRequest"> 流  </param>  
         ///   <param name="cookie"> cookie  </param>  
         ///   <param name="header"> 句柄  </param>  
         ///   <returns>   </returns>  
         public   static   byte [] GetHtmlByBytes( string  server,  string  URL,  byte [] byteRequest,  string  cookie,  out   string  header)
        {
             long  contentLength;
            HttpWebRequest httpWebRequest;
            HttpWebResponse webResponse;
            Stream getStream;
            StreamReader streamReader;

            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(URL);
             // CookieContainer co = new CookieContainer();
             // co.SetCookies(new Uri(server), cookie);

            LoginCookies.SetCookies( new  Uri(server), cookie);

            httpWebRequest.CookieContainer  =  LoginCookies;
            LoginCookies  =  httpWebRequest.CookieContainer;
            httpWebRequest.ContentType  =   " application/x-www-form-urlencoded " ;
            httpWebRequest.Accept  =
                 " image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* " ;
            httpWebRequest.Referer  =  server;
            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;
            httpWebRequest.Method  =   " Post " ;
            httpWebRequest.AllowAutoRedirect  =   false ; 
            httpWebRequest.ContentLength  =  byteRequest.Length;
            Stream stream;
            stream  =  httpWebRequest.GetRequestStream();
            stream.Write(byteRequest,  0 , byteRequest.Length);
            stream.Close();
            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();
            header  =  webResponse.Headers.ToString();
            getStream  =  webResponse.GetResponseStream();
            contentLength  =  webResponse.ContentLength;
                                 
             byte [] outBytes  =   new   byte [contentLength];
            outBytes  =  ReadFully(getStream);
            getStream.Close();
             return  outBytes;
        }
         public   static   byte [] ReadFully(Stream stream)
        {
             byte [] buffer  =   new   byte [ 128 ];
             using  (MemoryStream ms  =   new  MemoryStream())
            {
                 while  ( true )
                {
                     int  read  =  stream.Read(buffer,  0 , buffer.Length);
                     if  (read  <=   0 )
                         return  ms.ToArray();
                    ms.Write(buffer,  0 , read);
                }
            }
        }

         ///   <summary>  
         ///  Get模式 
         ///   </summary>  
         ///   <param name="URL"> 网址  </param>  
         ///   <param name="cookie"> cookies  </param>  
         ///   <param name="header"> 句柄  </param>  
         ///   <param name="server"> 服务器  </param>  
         ///   <param name="val"> 服务器  </param>  
         ///   <returns>   </returns>  
         public   static   string  GetHtml( string  URL,  string  cookie,  out   string  header,  string  server)
        {
             return  GetHtml(URL, cookie,  out  header, server,  "" );
        }
         ///   <summary>  
         ///  Get模式浏览 
         ///   </summary>  
         ///   <param name="URL"> Get网址  </param>  
         ///   <param name="cookie"> cookie  </param>  
         ///   <param name="header"> 句柄  </param>  
         ///   <param name="server"> 服务器地址  </param>  
         ///   <param name="val">   </param>  
         ///   <returns>   </returns>  
         public   static   string  GetHtml( string  URL,  string  cookie,  out   string  header,  string  server,  string  val)
        {
            HttpWebRequest httpWebRequest;
            HttpWebResponse webResponse;
            Stream getStream;
            StreamReader streamReader;
             string  getString  =   "" ;
            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(URL);
            httpWebRequest.Accept  =   " */* " ;
            httpWebRequest.Referer  =  server;
             // CookieContainer co = new CookieContainer();
             /// /co.SetCookies(new Uri(server), cookie);
             // httpWebRequest.CookieContainer = co;
            httpWebRequest.UserAgent  =
                 " Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322) " ;
            httpWebRequest.Method  =   " GET " ;
            webResponse  =  (HttpWebResponse)httpWebRequest.GetResponse();
            header  =  webResponse.Headers.ToString();
            getStream  =  webResponse.GetResponseStream();
            streamReader  =   new  StreamReader(getStream, Encoding.GetEncoding( " gb2312 " ));
            getString  =  streamReader.ReadToEnd();

            streamReader.Close();
            getStream.Close();
             return  getString;
        }
         ///   <summary>  
         ///  返回验证码图片流 
         ///   </summary>  
         ///   <param name="server"> 服务器地址  </param>  
         ///   <param name="URL"> 验证码网址  </param>  
         ///   <param name="cookie"> cookie  </param>  
         ///   <returns>   </returns>  
         public   static  Stream GetStreamByBytes( string  server,  string  URL,  string  cookie)
        {
            Stream stream  =  GetCode(server, URL, cookie);
             return  stream;
        }

         ///   <summary>  
         ///  //获取验证码 
         ///   </summary>  
         ///   <param name="server"> 服务器地址  </param>  
         ///   <param name="url"> 验证码网址  </param>  
         ///   <param name="cookie"> cookie  </param>  
         ///   <returns>   </returns>  
         public   static  Stream GetCode( string  server,  string  url,  string  cookie)
        {

            HttpWebRequest httpWebRequest;

            httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(url);
            CookieContainer co  =   new  CookieContainer();
            co.SetCookies( new  Uri(server), cookie);
            httpWebRequest.CookieContainer  =  co;

            HttpWebResponse response  =  (HttpWebResponse)httpWebRequest.GetResponse();
            Stream stream  =  response.GetResponseStream();
             return  stream;

        }
         ///   <summary>  
         ///  获取html 
         ///   </summary>  
         ///   <param name="server">   </param>  
         ///   <param name="url">   </param>  
         ///   <param name="cookie">   </param>  
         ///   <returns>   </returns>  

         public   static   string  GetUser( string  server,  string  url,  string  cookie)
        {
             string  getString  =   "" ;
             try
            {
                HttpWebRequest httpWebRequest;
                StreamReader streamReader;


                httpWebRequest  =  (HttpWebRequest)HttpWebRequest.Create(url);
                CookieContainer co  =   new  CookieContainer();
                co.SetCookies( new  Uri(server), cookie);
                httpWebRequest.CookieContainer  =  co;

                HttpWebResponse response  =  (HttpWebResponse)httpWebRequest.GetResponse();

                Stream stream  =  response.GetResponseStream();


                streamReader  =   new  StreamReader(stream, Encoding.GetEncoding( " gb2312 " ));
                getString  =  streamReader.ReadToEnd();


                 try
                {
                    httpWebRequest.GetResponse().Close();
                }
                 catch  (WebException ex)
                {
                     throw  ex;
                }
                streamReader.Close();
                stream.Close();

            }
             catch
            {
            }
             return  getString;

        }

    }

}