很久没有写新的东西了，今天在工作中遇到的一个问题，感觉很有用，有种想记下来的冲动。

这篇文章是有关模拟登录网站方面的。

实现步骤；

1. 启用一个web会话
2. 发送模拟数据请求（POST或者GET）
3. 获取会话的CooKie 并根据该CooKie继续访问登录后的页面，获取后续访问的页面数据。

我们以登录人人网为例，首先需要分析人人网登录时POST的数据格式，这个可以通过IE9中只带的F12快捷键，调出开发人员工具。如下图：

 

通过开始捕获得到POST的地址和POST的数据

POST数据：

POST地址：

http://www.renren.com/PLogin.do

下面就是代码示例来得到登录后页面（http://guide.renren.com/guide）的数据

HTMLHelper类

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Net; using System.IO; using System.Threading; namespace Test {
     public class HTMLHelper     {
     /// 
 /// 获取CooKie /// 
 ///  ///  ///  /// 
               public static CookieContainer GetCooKie(string loginUrl, string postdata, HttpHeader header)        {
                HttpWebRequest request = null;            HttpWebResponse response = null; try            {
                    CookieContainer cc = new CookieContainer();                request = (HttpWebRequest)WebRequest.Create(loginUrl);                request.Method = header.method;                request.ContentType = header.contentType; byte[] postdatabyte = Encoding.UTF8.GetBytes(postdata);                request.ContentLength = postdatabyte.Length;                request.AllowAutoRedirect = false;                request.CookieContainer = cc;                request.KeepAlive = true; //提交请求                Stream stream;                stream = request.GetRequestStream();                stream.Write(postdatabyte, 0, postdatabyte.Length);                stream.Close(); //接收响应                response = (HttpWebResponse)request.GetResponse();                response.Cookies = request.CookieContainer.GetCookies(request.RequestUri);                CookieCollection cook = response.Cookies; //Cookie字符串格式                string strcrook = request.CookieContainer.GetCookieHeader(request.RequestUri); return cc;            } catch (Exception ex)            {
     throw ex;            }        } /// 
 /// 获取html /// 
 ///  ///  ///  /// 
               public static string GetHtml(string getUrl, CookieContainer cookieContainer,HttpHeader header)        {
                Thread.Sleep(1000);            HttpWebRequest httpWebRequest = null;            HttpWebResponse httpWebResponse = null; try            {
                    httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(getUrl);                httpWebRequest.CookieContainer = cookieContainer;                httpWebRequest.ContentType = header.contentType;                httpWebRequest.ServicePoint.ConnectionLimit = header.maxTry;                httpWebRequest.Referer = getUrl;                httpWebRequest.Accept = header.accept;                httpWebRequest.UserAgent = header.userAgent;                httpWebRequest.Method = "GET";                httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();                Stream responseStream = httpWebResponse.GetResponseStream();                StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8); string html = streamReader.ReadToEnd();                streamReader.Close();                responseStream.Close();                httpWebRequest.Abort();                httpWebResponse.Close(); return html;            } catch (Exception e)            {
     if (httpWebRequest != null) httpWebRequest.Abort(); if (httpWebResponse != null) httpWebResponse.Close(); return string.Empty;            }        }     } public class HttpHeader    {
     public string contentType { get; set; } public string accept { get; set; } public string userAgent { get; set; } public string method{
     get;set;} public int maxTry { get; set; }    } }

 

测试用例：

HttpHeader header = new HttpHeader();                 header.accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, */*";                 header.contentType = "application/x-www-form-urlencoded";                 header.method = "POST";                 header.userAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)";                 header.maxTry = 300; string html = HTMLHelper.GetHtml("http://guide.renren.com/guide", HTMLHelper.GetCooKie("http://www.renren.com/PLogin.do", "email=aaa@163.com&password=111&icode=&origURL=http%3A%2F%2Fwww.renren.com%2Fhome&domain=renren.com&key_id=1&_rtk=90484476", header), header);                 Console.WriteLine(html);                Console.ReadLine();

 

 

上一篇文章中我们讲了，如何采用程序模拟登录网站，并获取登录后网站的内容，今天在此基础上继续将，通过程序登录了网站后而直接进入登录后的页面。

首先还是发起一个启用一个web会话，然后发送模拟数据请求，获取会话的CooKie，再根据该CooKie将其写入到本地，通过程序直接打开登录后的页面。

该功能可用于无法修改第三方系统源代码而要做系统单点登录。

 

我们先在HTMLHelper类中添加一个方法：

1 /// 
  2 /// 获取CookieCollection  3 /// 
  4 ///   5 ///   6 ///   7 /// 
          8        public static CookieCollection GetCookieCollection(string loginUrl, string postdata, HttpHeader header)  9        {
      10            HttpWebRequest request = null; 11            HttpWebResponse response = null; 12            try 13            {
      14                CookieContainer cc = new CookieContainer(); 15                request = (HttpWebRequest)WebRequest.Create(loginUrl); 16                request.Method = header.method; 17                request.ContentType = header.contentType; 18                byte[] postdatabyte = Encoding.UTF8.GetBytes(postdata); 19                request.ContentLength = postdatabyte.Length; 20                request.AllowAutoRedirect = false; 21                request.CookieContainer = cc; 22                request.KeepAlive = true; 23 24                //提交请求 25                Stream stream; 26                stream = request.GetRequestStream(); 27                stream.Write(postdatabyte, 0, postdatabyte.Length); 28                stream.Close(); 29 30                //接收响应 31                response = (HttpWebResponse)request.GetResponse(); 32                response.Cookies = request.CookieContainer.GetCookies(request.RequestUri); 33 34                CookieCollection cook = response.Cookies; 35                //Cookie字符串格式 36                string strcrook = request.CookieContainer.GetCookieHeader(request.RequestUri); 37 38                return cook; 39            } 40            catch (Exception ex) 41            {
      42 43                throw ex; 44            } 45        }

再根据获取的CookieCollection写入本地，并打开登录后的页面

1   [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]  2  3         public static extern bool InternetSetCookie(string lpszUrlName, string lbszCookieName, string lpszCookieData);  4  5  6   HttpHeader header = new HttpHeader();  7                 header.accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, */*";  8                 header.contentType = "application/x-www-form-urlencoded";  9                 header.method = "POST"; 10                 header.userAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)"; 11                 header.maxTry = 300; 12 13 14  CookieCollection mycookie = HTMLHelper.GetCookieCollection("http://www.renren.com/PLogin.do", 15                     "email=aaa%40163.com&password=111&icode=&origURL=http%3A%2F%2Fwww.renren.com%2Fhome&domain=renren.com&key_id=1&_rtk=90484476", header); 16 17 18  foreach (Cookie cookie in mycookie) //将cookie设置为浏览的cookie  19                 {
      20 21                     InternetSetCookie( 22 23                          "http://" + cookie.Domain.ToString(), 24 25                          cookie.Name.ToString(), 26 27                          cookie.Value.ToString() + ";expires=Sun,22-Feb-2099 00:00:00 GMT"); 28 29                 } 30                 System.Diagnostics.Process.Start("http://guide.renren.com/guide");

这样即可直接通过程序打开登录后的页面：