C#远程登陆带验证码的网站

C#远程登陆带验证码的网站

第一步:添加空间引用

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Net;

using System.IO;

using System.Text;

using System.Diagnostics;

using System.Web;

第二步:按钮运行代码

private void button4_Click(object sender, System.EventArgs e)

  {

   this.button4.Enabled=false;

   //第一步:获取系统登陆验证码

   string url="http://localhost:8001/login.asp";

   string indata="";

   string outdata="";

   CookieContainer myCookieContainer=new CookieContainer();

   //新建一个CookieContainer来存放Cookie集合

   HttpWebRequest myHttpWebRequest=(HttpWebRequest)WebRequest.Create(url);

   //新建一个HttpWebRequest

   myHttpWebRequest.Referer="http://localhost:8001/login.asp";

   myHttpWebRequest.ContentType="application/x-www-form-urlencoded";

   myHttpWebRequest.ContentLength=indata.Length;

   myHttpWebRequest.Method="POST";

   myHttpWebRequest.CookieContainer=myCookieContainer;

   //设置HttpWebRequest的CookieContainer为刚才建立的那个myCookieContainer

   Stream myRequestStream=myHttpWebRequest.GetRequestStream();

   StreamWriter myStreamWriter=new StreamWriter(myRequestStream,Encoding.GetEncoding("gb2312"));                

   myStreamWriter.Write(indata);

   //把数据写入HttpWebRequest的Request流

   myStreamWriter.Close();

   myRequestStream.Close();

   //关闭打开对象

   HttpWebResponse myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse();

   //新建一个HttpWebResponse

   myHttpWebResponse.Cookies=myCookieContainer.GetCookies(myHttpWebRequest.RequestUri);

   //获取一个包含url的Cookie集合的CookieCollection

   Stream myResponseStream=myHttpWebResponse.GetResponseStream();

   StreamReader myStreamReader=new StreamReader(myResponseStream,Encoding.GetEncoding("gb2312"));

   outdata=myStreamReader.ReadToEnd();

   //把数据从HttpWebResponse的Response流中读出

   myStreamReader.Close();

   myResponseStream.Close();

   Console.WriteLine("获取验证码"+outdata);

   //第二步:尝试登陆系统获取登陆后的Cookie

   string VerifyCode=outdata.Substring(outdata.LastIndexOf("id=/"verifycode/"")+63,4);   

   url="http://localhost:8001/Checklogin.asp";

   indata="UserName=testuser&Password=testpassword&verifycode="+VerifyCode;

   outdata="";

   //新建一个CookieContainer来存放Cookie集合

   myHttpWebRequest=(HttpWebRequest)WebRequest.Create(url);

   //新建一个HttpWebRequest

   myHttpWebRequest.Referer="http://localhost:8001/login.asp";

   myHttpWebRequest.ContentType="application/x-www-form-urlencoded";

   myHttpWebRequest.ContentLength=indata.Length;

   myHttpWebRequest.Method="POST";

   myHttpWebRequest.CookieContainer=myCookieContainer;

   //设置HttpWebRequest的CookieContainer为刚才建立的那个myCookieContainer

   myRequestStream=myHttpWebRequest.GetRequestStream();

   myStreamWriter=new StreamWriter(myRequestStream,Encoding.GetEncoding("gb2312"));                

   myStreamWriter.Write(indata);

   //把数据写入HttpWebRequest的Request流

   myStreamWriter.Close();

   myRequestStream.Close();

   //关闭打开对象

   myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse();

   //新建一个HttpWebResponse

   myHttpWebResponse.Cookies=myCookieContainer.GetCookies(myHttpWebRequest.RequestUri);

   //获取一个包含url的Cookie集合的CookieCollection

   myResponseStream=myHttpWebResponse.GetResponseStream();

   myStreamReader=new StreamReader(myResponseStream,Encoding.GetEncoding("gb2312"));

   outdata=myStreamReader.ReadToEnd();

   //把数据从HttpWebResponse的Response流中读出

   myStreamReader.Close();

   myResponseStream.Close();

   Console.WriteLine("登陆系统"+outdata);

   //第二步:尝试需要登陆后才能浏览的页面

   //拿到登录后的Cookie，再发送需要登陆的页面请求就能直接读取到登录后的内容了

   url="http://localhost:8001/WowPrice.asp";

   myHttpWebRequest=(HttpWebRequest)WebRequest.Create(url);

   myHttpWebRequest.CookieContainer=myCookieContainer;    

   //刚才那个CookieContainer已经存有了Cookie,把它附加到HttpWebRequest中则能直接通过验证

   myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse();

   myHttpWebResponse.Cookies=myCookieContainer.GetCookies(myHttpWebRequest.RequestUri);

   myResponseStream=myHttpWebResponse.GetResponseStream();

   myStreamReader=new StreamReader(myResponseStream,Encoding.GetEncoding("gb2312"));

   outdata=myStreamReader.ReadToEnd();

   myStreamReader.Close();

   myResponseStream.Close();

   Console.WriteLine("获取价格页面"+outdata);

   this.button4.Enabled=true;

  }