这篇文章是有关模拟登录网站方面的。
实现步骤；
启用一个web会话
发送模拟数据请求（POST或者GET）
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：
email=aaa@163.com&password=111&icode=&origURL=http%3A%2F%2Fwww.renren.com%2Fhome&domain=renren.com&key_id=1&_rtk=90484476
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
{
/// <summary>
/// 获取CooKie
/// </summary>
/// <param name="loginUrl"></param>
/// <param name="postdata"></param>
/// <param name="header"></param>
/// <returns></returns>
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;
}
}
/// <summary>
/// 获取html
/// </summary>
/// <param name="getUrl"></param>
/// <param name="cookieContainer"></param>
/// <param name="header"></param>
/// <returns></returns>
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();
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 /// <summary>
2 /// 获取CookieCollection
3 /// </summary>
4 /// <param name="loginUrl"></param>
5 /// <param name="postdata"></param>
6 /// <param name="header"></param>
7 /// <returns></returns>
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");
复制代码
这样即可直接通过程序打开登录后的页面：
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