class Class3
{
public static void A()
{
HttpWebRequest request = null;
HttpWebResponse response = null;
string gethost = string.Empty;
CookieContainer cc = new CookieContainer();
string Cookiesstr = string.Empty;
try
{
//第一次POST请求
string postdata = @"username=%E5%B0%8F%E5%B0%8F%E7%9A%84%E5%85%94%E5%85%94&loginFlag=1&userId=2356208%0D%0A";//模拟请求数据
string LoginUrl = "http://szbbs.sznews.com/logging.php?action=login&curpage=%2Fsearch.php%3Fascdesc%3Ddesc%26before%3D%26formhash%3D81d3dcc0%26orderby%3Dlastpost%26searchsubmit%3Dtrue%26srchfid%255B%255D%3Dall%26srchfilter%3Dall%26srchfrom%3D0%26srchtxt%3Dtest%26srchtypeid%3D%26srchuname%3D";
request = (HttpWebRequest)WebRequest.Create(LoginUrl);//实例化web访问类
request.Method = "POST";//数据提交方式为POST
//模拟头
request.ContentType = "application/x-www-form-urlencoded";
byte[] postdatabytes = Encoding.GetEncoding("gb2312").GetBytes(postdata);
request.ContentLength = postdatabytes.Length;
request.Referer = "login.sina.com.cn";
request.AllowAutoRedirect = false;
request.CookieContainer = cc;
request.KeepAlive = true;
//提交请求
Stream stream;
stream = request.GetRequestStream();
stream.Write(postdatabytes, 0, postdatabytes.Length);
stream.Close();
//接收响应
response = (HttpWebResponse)request.GetResponse();
//保存返回cookie
response.Cookies = request.CookieContainer.GetCookies(request.RequestUri);
CookieCollection cook = response.Cookies;
string strcrook = request.CookieContainer.GetCookieHeader(request.RequestUri);
Cookiesstr = strcrook;
//取第一次GET跳转地址
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("UTF-8"));
string content = sr.ReadToEnd();
response.Close();
}
catch (Exception)
{
//第一次POST出错;
}
try
{
//Cookiesstr = @"cdb_sid=CdQgsf; cdb_cookietime=0; cdb_auth=FoJk27b3Ynm3s%2FvMEfuXmCtyweSWb9Go7lE7emrVJ80KJ%2FWpT1SfdcHvXPSiGsnM%2BVMstkFU6ng";
gethost = "http://szbbs.sznews.com/search.php"; //第一次GET跳转地址
request = (HttpWebRequest)WebRequest.Create(gethost);
request.Method = "GET";
request.KeepAlive = true;
request.Headers.Add("Cookie:" + Cookiesstr);
request.CookieContainer = cc;
request.AllowAutoRedirect = false;
response = (HttpWebResponse)request.GetResponse();
//设置cookie
Cookiesstr = request.CookieContainer.GetCookieHeader(request.RequestUri);
//取再次跳转链接
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
string content = sr.ReadToEnd();
request.Abort();
sr.Close();
response.Close();
}
catch (Exception)
{
//第一次GET出错
}
}
}
模拟登录(一次自动调转)
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转载自blog.csdn.net/hjingtao/article/details/7802927
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