使用 .NET 的 HttpWebRequest 可轻松实现站外提交功能,
代码如下:
ASCIIEncoding encoding
=
new
ASCIIEncoding();
string
postData
=
"
TextBox1=33&Button1=Button
"
;
byte
[] data
=
encoding.GetBytes(postData);

//
Prepare web request
HttpWebRequest myRequest
=
(HttpWebRequest)WebRequest.Create(
"
http://localhost/testform1.aspx
"
);
myRequest.Method
=
"
POST
"
;
myRequest.ContentType
=
"
application/x-www-form-urlencoded
"
;
myRequest.ContentLength
=
data.Length;
Stream newStream
=
myRequest.GetRequestStream();
//
Send the data.
newStream.Write(data,
0
,data.Length);
newStream.Close();
解释:
postData 为你要提交的数据
比如 优快云 的登录页面 http://www.youkuaiyun.com/member/UserLogin.aspx
输入用户名密码和校验码,并提交之后,浏览器便将下面的数据提交到服务器:
优快云UserLogin%3Atb_UserName
=
yourName&优快云UserLogin%3Atb_Password
=
yourPassword&优快云UserLogin%3Atb_ExPwd
=
2332
其中的 yourName 为你实际登陆时提交的用户名, yourPassword 即为你的密码, 2332 是我刚才登陆时的验证码
这里介绍个工具: Visual Sniffer , google 一下便可轻松找到下载地址。
可以使用 Visual Sniffer 来捕捉提交的数据信息:
1. 访问你需要站外提交的页面,比如 优快云 登陆页 http://www.youkuaiyun.com/member/UserLogin.aspx
2. 填写好需要的资料,比如用户名和密码,
3. 打开 Visual Sniffer, 点“开始拦截”
4. 在访问的页面中提交。
5. 等提交成功之后,在 Visual Sniffer 中“停止拦截”
6. 在 Visual Sniffer 的左侧栏的加号中依次点开,右边是它拦截到的内容,
找到 内容含有 POST http://www.youkuaiyun.com/member/UserLogin.aspx 的节点
以下是我拦截的内容供参考:
POST http://www.youkuaiyun.com/member/UserLogin.aspx HTTP/
1.0
Accept: image/gif
,
image/x-xbitmap
,
image/jpeg
,
image/pjpeg
,
application/vnd.ms-excel
,
application/vnd.ms-powerpoint
,
application/msword
,
application/x-shockwave-flash
,
*/*
Referer: http://www.youkuaiyun.com/member/UserLogin.aspx
Accept-Language: zh-cn
Content-Type: application/x-www-form-urlencoded
UA-CPU: x86
Pragma: no-cache
User-Agent: Mozilla/
4.0
(compatible
;
MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; InfoPath.1)
Host: www.youkuaiyun.com
Content-Length:
355
Proxy-Connection: Keep-Alive
Cookie: ASPSESSIONIDAAAATBQC
=
FMEGGCKDBKHAMMCGKPFDMBFG
;
ASP.NET_SessionId=lusprmnom05lr445tmteaf55; userid=699879
__EVENTTARGET
=
&__EVENTARGUMENT
=
&__VIEWSTATE
=
dDwtMTcwMzgxNjQ2Mjs7bDxDU0ROVXNlckxvZ2luOmNiX1NhdmVTdGF0ZTtDU0ROVXNlckxvZ2luOkltYWdlX0xvZ2luOz4%2Btu1q2wmRZoAJTi9L73w1zBleylY%3D&优快云UserLogin%3Atb_UserName
=
testusername&优快云UserLogin%3Atb_Password
=
testpassword&优快云UserLogin%3Atb_ExPwd
=
9232
&from
=
&优快云UserLogin%3AImage_Login.x
=
36
&优快云UserLogin%3AImage_Login.y
=
6
GET http://www.youkuaiyun.com/mycustompage.htm?aspxerrorpath
=
/member/UserLogin.aspx HTTP/
1.0
Accept: image/gif
,
image/x-xbitmap
,
image/jpeg
,
image/pjpeg
,
application/vnd.ms-excel
,
application/vnd.ms-powerpoint
,
application/msword
,
application/x-shockwave-flash
,
*/*
Referer: http://www.youkuaiyun.com/member/UserLogin.aspx
Accept-Language: zh-cn
UA-CPU: x86
Pragma: no-cache
User-Agent: Mozilla/
4.0
(compatible
;
MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; InfoPath.1)
Host: www.youkuaiyun.com
Proxy-Connection: Keep-Alive
Cookie: ASPSESSIONIDAAAATBQC
=
FMEGGCKDBKHAMMCGKPFDMBFG
;
ASP.NET_SessionId=lusprmnom05lr445tmteaf55; userid=699879
注意:PostData 参数之间是以 " & " 进行 连接的
OK,通过以上简单示例,只要稍微修改下,即可做成多站点自动登陆,或自动网上投票等功能!
参考网址:
http://dev.youkuaiyun.com/article/28/28374.shtm
http://www.knowsky.com/18774.html
http://www.netomatix.com/HttpPostData.aspx