模拟艺龙旅游网登录，供大家参考，具体内容如下
想模拟登录，首先整理一下流程
1.通过360浏览器(ie,火狐等等)f12开发人员工具抓到相关数据
2.获取验证码（拿到cookie），登录时也需要使用
3.登录
f12调出开发人员工具，输入用户名，密码登录，看我们抓到了什么信息。
request url:这个就是登录请求的url
https://secure.elong测试数据/passport/ajax/elonglogin
方式post
form data:这个是我们要post传输的数据：
username=xzdylyh&passwd=12313&validatecode=验证码&rememberme=false
其它一些重要信息在request headers中
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我使用c# 设计的winform界面
复制代码
using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.threading.tasks;
using system.web;
using system.net;
using system.io;
using system.data;
namespace httphelper
{
public class elogn_login
{
public static cookiecontainer container = null ; //存储验证码cookie
#region 登录
public string requestm( string uname, string passwd, string vaildate)
{
httpwebrequest request = null ;
httpwebresponse response = null ;
try
{
request = (httpwebrequest)httpwebrequest.create( "https://secure.elong测试数据/passport/ajax/elonglogin" );
request.method = "post" ;
request.contenttype = "application/x-www-form-urlencoded; charset=utf-8" ;
request.useragent = "mozilla/5.0 (windows nt 10.0; wow64) applewebkit/537.36 (khtml, like gecko) chrome/45.0.2454.101 safari/537.36" ;
request.allowautoredirect = true ;
request.cookiecontainer = container; //获取验证码时候获取到的cookie会附加在这个容器里面
request.keepalive = true ; //建立持久性连接
//整数据
string postdata = string .format( "username={0}&passwd={1}&validatecode={2}&rememberme=true" , uname, passwd, vaildate);
asciiencoding encoding = new asciiencoding();
byte [] bytepostdata = encoding.getbytes(postdata);
request.contentlength = bytepostdata.length;
//发送数据 using结束代码段释放
using (stream requeststm = request.getrequeststream())
{
requeststm.write(bytepostdata, 0, bytepostdata.length);
}
//响应
response = (httpwebresponse)request.getresponse();
string text = string .empty;
using (stream responsestm = response.getresponsestream())
{
streamreader redstm = new streamreader(responsestm, encoding.utf8);
text = redstm.readtoend();
}
return text;
}
catch (exception ex)
{
var msg = ex.message;
return msg;
}
}
#endregion
#region 获取验证码
public stream getcodestream( string codeurl)
{
//验证码请求
httpwebrequest request = (httpwebrequest)webrequest.create(codeurl);
request.method = "get" ;
request.contenttype = "application/x-www-form-urlencoded" ;
request.useragent = "mozilla/5.0 (windows nt 6.1; wow64; rv:5.0.1) gecko/20100101 firefox/5.0.1" ;
request.accept = "image/webp,*/*;q=0.8" ;
request.cookiecontainer = new cookiecontainer(); //!very important.!!!
container = request.cookiecontainer;
var c = request.cookiecontainer.getcookies(request.requesturi);
httpwebresponse response = (httpwebresponse)request.getresponse();
response.cookies = container.getcookies(request.requesturi);
stream stream = response.getresponsestream();
return stream;
}
}
#endregion
}
using system;
using system.collections.generic;
using system测试数据ponentmodel;
using system.data;
using system.drawing;
using system.linq;
using system.text;
using system.threading.tasks;
using system.windows.forms;
using system.io;
using httphelper;
namespace windowsformsapplication8
{
public partial class elong_login_form : form
{
public elong_login_form()
{
initializecomponent();
}
private void button1_click( object sender, eventargs e)
{
elogn_login elonglogin = new elogn_login();
var rmsg = elonglogin.requestm(txtusername.text,txtpassword.text,txtvaildata.text);
messagebox.show(rmsg);
}
private void elong_login_form_load( object sender, eventargs e)
{
reflshpicimage(); //更新验证码
}
//更新验证码
public void reflshpicimage()
{
string codeurl = "https://secure.elong测试数据/passport/getvalidatecode" ;
elogn_login agent = new elogn_login();
stream stmimage = agent.getcodestream(codeurl);
picvalidate.image = image.fromstream(stmimage);
}
private void btnrevalidate_click( object sender, eventargs e)
{
reflshpicimage(); //更新验证码
}
private void picvalidate_click( object sender, eventargs e)
{
reflshpicimage(); //更新验证码
}
}
}
最后执行效果，登录的session已经成功返回。
dy("nrwz");
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