最近在做爬虫程序，在post提交模拟登录时遇到了些问题，一些网站是正常的，但有些怎么测试也是出错，希望高手能帮忙看一下，谢谢。
代码如下：是登录百度贴吧
Code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.Collections;
using System.Collections.Specialized;
namespace TestHttp
{
public partial class frmBaiduTB : Form
{
const string C_LoginUrl = "https://passport.baidu.com/?login";
CookieContainer m_cc = new CookieContainer();
public frmBaiduTB()
{
InitializeComponent();
}
private void btnLogin_Click(object sender, EventArgs e)
{
HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(C_LoginUrl);
httpReq.Method = "POST";
httpReq.CookieContainer = m_cc;
httpReq.Accept = "*/*";
httpReq.Referer = "http://passport.baidu.com/?login";
httpReq.ContentType = "application/x-www-form-urlencoded";
httpReq.AllowAutoRedirect = false;
httpReq.Headers.Add("Accept-Encoding", "gzip, deflate");
httpReq.Headers.Add("Accept-Language", "zh-cn");
httpReq.Headers.Add("Cache-Control", "no-cache");
httpReq.Headers.Add("UA-CPU", "x86");
httpReq.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; InfoPath.2)";
string strPostData = GetPostData();
byte[] bsInData = Encoding.GetEncoding("utf-8").GetBytes(strPostData);
httpReq.ContentLength = bsInData.Length;
Stream inputStream = httpReq.GetRequestStream();
inputStream.Write(bsInData, 0, bsInData.Length);
inputStream.Close();
inputStream.Dispose();
HttpWebResponse httpRes = null;
try
{
//此处总是出现错误，{"基础连接已经关闭: 连接被意外关闭。"}System.Exception {System.Net.WebException}
//这是怎么回事啊？
httpRes = (HttpWebResponse)httpReq.GetResponse();
}
catch (WebException ex)
{
httpRes = (HttpWebResponse)ex.Response;
MessageBox.Show( ex.Message );
return;
}
Stream outStream = httpRes.GetResponseStream();
StreamReader sr = new StreamReader(outStream);
MessageBox.Show(sr.ReadToEnd());
sr.Close();
string strLocation = "";
string strCookie = "";
if (httpRes.StatusCode == HttpStatusCode.Redirect)
{
strLocation = httpRes.Headers["Location"];
strCookie = httpRes.Headers.Get("Set-Cookie");
}
}
private string GetPostData()
{
string strRtn = "";
NameValueCollection nvc = new NameValueCollection();
nvc.Add("aid","");
nvc.Add("more_param","");
nvc.Add("need_coin","");
nvc.Add("need_pay","");
nvc.Add("next_target","");
nvc.Add("password", txtPwd.Text);
nvc.Add("pay_method","");
nvc.Add("psp_tt","0");
nvc.Add("return_method","get");
nvc.Add("return_type","");
nvc.Add("safeflg","0");
nvc.Add("skip_ok","");
nvc.Add("tpl","tb");
nvc.Add("tpl_ok","");
nvc.Add("u","http://tieba.baidu.com/");
nvc.Add("username", txtUserName.Text);
nvc.Add("verifycode","");
foreach (string ie in nvc)
{
strRtn += ie + "=" + nvc[ie] + "&";
}
if (strRtn.EndsWith("&"))
strRtn = strRtn.Substring(0, strRtn.Length - 1);
return strRtn; ;
}
}
}
