HttpWebRequest实现模拟登陆并抓取登陆后的页面信息

zq826348886 2010-04-03 05:21:38

急急急！！！……
现在我有两个系统，一个A系统，是外网的，一个B系统，我现在要在B系统中用HttpWebRequest实现模拟登陆
A系统，并抓取A系统中的数据。假如A系统中有个登陆页面LoginA.aspx,还有个ListA.aspx页面，A系统登陆
后会设置一个Session，在进入ListA.aspx页面时也要验证Session，现在要实现的功能是我要在我的B系统中
模拟登陆进A系统，并且获取A系统中ListA.aspx页面里的内容。
跪求具体代码。。。

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sdfasdf2w2 2012-03-13

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[Quote=引用 15 楼 cheungqin 的回复:]
好说好说邮箱发我我有示例
[/Quote]
给一份啊大侠。。。 444261689@qq.com

youbingbingke820 2011-11-21

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[Quote=引用 15 楼 cheungqin 的回复:]
好说好说邮箱发我我有示例
[/Quote]

给一份啊大侠。。。 youbing820@126.com

星先 2011-08-27

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...也给我一份..
scys1217@sohu.com

qq397465 2011-07-21

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能不能给我一份

zq826348886 2010-04-06

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zq826348886@qq.com 谢啦兄弟~~~~

CheungQin 2010-04-06

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好说好说邮箱发我我有示例

lpyqyc 2010-04-04

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这是一个类似单点登录的问题，你在网上搜单点登录的解决方案，就能解决你的问题。

ycwj88 2010-04-04

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之前搞单点登录的时候玩过，httpwebrequest模拟一个post请求。

newdigitime 2010-04-04

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先人工登录.
然后用抓包工具得到相关的cookie键值. 加入到httpwebrequest的发送数据包里.

zq826348886 2010-04-04

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[Quote=引用 11 楼 newdigitime 的回复:]
先人工登录.
然后用抓包工具得到相关的cookie键值. 加入到httpwebrequest的发送数据包里.
[/Quote]

这个方法确实可行但我要的不是这种效果啊我想做的是在B系统中输入用户名密码来登录A系统。。。

zhouzangood 2010-04-03

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upupup

wuyq11 2010-04-03

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在PostAndGetHTML里先登录，再httpwebrequest抓取数据
登录后out CookieContainer值

bingo_ 2010-04-03

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只是一个保持Cookie的问题
http://www.cnblogs.com/yidanda/archive/2009/07/22/1528530.html

zq826348886 2010-04-03

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大侠都进来切磋切磋啦~~~~ 跪等3天

hxn1987420 2010-04-03

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学习中，路过顶贴！！！！

zq826348886 2010-04-03

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谁解决了所有分值全部奉上，再加101分总共200分，谢谢各位大侠了，急急急

zq826348886 2010-04-03

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以下为我写的测试代码仅供参考，在登陆后，如果成功，返回的Html流应该有【登陆成功】，但是现在没有返回。还有当我再请求第二个页面ListA.aspx时，会报:远程服务器返回错误: (500) 内部服务器错误。
各位大侠帮帮忙啊

//-------------------------------B系统代码，点击Button1模拟登陆------------------

protected void Button1_Click(object sender, EventArgs e)
{
try
{
CookieContainer cc = new CookieContainer();//this is for keep the Session and Cookie

Hashtable param = new Hashtable();//this is for keep post data.

//以下地址是A系统的登录地址
string urlLogin = "http://192.168.1.20:10031/LoginA.aspx";
param.Add("txtUs", "wang");
param.Add("txtPa", "1234");
param.Add("Button1", "Button");
string result = PostAndGetHTML(urlLogin, cc, param);
param.Clear();
//A系统里的ListA.aspx页面
string url2 = "http://192.168.1.20:10031/ListA.aspx";
param = new Hashtable();
result = PostAndGetHTML(url2, cc, param);
}
catch (WebException we)
{
string msg = we.Message;
}

}

public string PostAndGetHTML(string targetURL, CookieContainer cc, Hashtable param)
{
try
{
//prepare the submit data
string formData = "";

foreach (DictionaryEntry de in param)
{
formData += de.Key.ToString() + "=" + de.Value.ToString() + "&";
}

if (formData.Length > 0)
formData = formData.Substring(0, formData.Length - 1); //remove last '&'

ASCIIEncoding encoding = new ASCIIEncoding();

byte[] data = encoding.GetBytes(formData);

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(targetURL));

request.CookieContainer = cc;
request.Method = "POST"; //post
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
request.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; CIBA; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";
request.Referer = targetURL;
request.KeepAlive = true;

Stream newStream = request.GetRequestStream();
newStream.Write(data, 0, data.Length);
newStream.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
response.Cookies = cc.GetCookies(request.RequestUri);
cc.Add(response.Cookies);
Stream stream = response.GetResponseStream();
string result = new StreamReader(stream, System.Text.Encoding.UTF8).ReadToEnd();

return result;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}

}

//-------------------------------A系统代码------------------

LoginA.aspx
-----------HTML代码

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="Test003.WebForm2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server" action="" method="post">
<div>
<table>
<tr>
<td>用户名：</td>
<td>
<input type="text" id="txtUs" name="txtUs" /></td>

<tr>
<td>密码：</td>
<td><input type="text" id="txtPa" name="txtPa" /></td>
</tr>
<tr>
<td colspan="2">
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
</td>
</tr>
<tr>
<td colspan="2">
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label></td>
</tr>
</table>
</div>
</form>
</body>
</html>

----------C#代码

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

namespace Test003
{
public partial class LoginA : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}

protected void Button1_Click(object sender, EventArgs e)
{
string name = Request.Form["txtUs"];
string pass = Request.Form["txtPa"];
//string [] name = Request.Form.GetValues("txtUs");
//string[] pass = Request.Form.GetValues("txtPa");
if (name == "wang" && pass == "1234")
{
this.Label1.Text = "登陆成功！";
Session["wang"] = "wang";
}
else
{
this.Label1.Text = "登陆失败";
Session["wang"] = "shao";
}
}
}
}

ListA.aspx页面

-------------------HTML代码，只有一个Label，用户显示

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm3.aspx.cs" Inherits="Test003.WebForm3" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</div>
</form>
</body>
</html>

----------------C#代码，给Label赋值

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

namespace Test003
{
public partial class ListA : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string ab = Session["wang"].ToString();
this.Label1.Text = ab;

}
}
}