用HttpWebRequest 模拟网站登录

C# 2009-07-03 14:40 阅读88 评论0 字号： 大大 中中 小小 用HttpWebRequest 模拟网站登录时，如何将存在本机电脑中cookies文件中的cookies解析出来并一同提交?

例如本机电脑中cookies文件中存有一网站登录的用户名和密码，如何将用户名和密码从cookies解析出来并一同提交:

static void Post(string url, string indata)
{

string outdata = "";

CookieContainer myCookieContainer = new CookieContainer();
//新建一个CookieContainer来存放Cookie集合

HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
//新建一个HttpWebRequest
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
myHttpWebRequest.ContentLength = indata.Length;
myHttpWebRequest.Method = "POST";
myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; Q312461; .NET CLR 1.0.3705)";
myHttpWebRequest.CookieContainer = myCookieContainer;
//设置HttpWebRequest的CookieContainer为刚才建立的那个myCookieContainer
Stream myRequestStream = myHttpWebRequest.GetRequestStream();
StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
myStreamWriter.Write(indata,0,indata .Length);
//把数据写入HttpWebRequest的Request流
myStreamWriter.Close();
myRequestStream.Close();
//关闭打开对象

HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
//新建一个HttpWebResponse
myHttpWebResponse.Cookies = myCookieContainer.GetCookies(myHttpWebRequest.RequestUri);
//获取一个包含url的Cookie集合的CookieCollection
Stream myResponseStream = myHttpWebResponse.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("gb2312"));
outdata = myStreamReader.ReadToEnd();
//把数据从HttpWebResponse的Response流中读出
myStreamReader.Close();
myResponseStream.Close();
Console.WriteLine(outdata);
//显示"登录"

//拿到了Cookie，再进行请求就能直接读取到登录后的内容了
myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
myHttpWebRequest.CookieContainer = myCookieContainer;//*
//刚才那个CookieContainer已经存有了Cookie,把它附加到HttpWebRequest中则能直接通过验证
myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
myHttpWebResponse.Cookies = myCookieContainer.GetCookies(myHttpWebRequest.R

equestUri);
myResponseStream = myHttpWebResponse.GetResponseStream();
myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("gb2312"));
outdata = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
Console.WriteLine(outdata);
//再次显示"登录"
//如果把*行注释调，就显示"没有登录"
}


上面的方法可以获取网页返回的cookies,然后再提交，如何将存在本机电脑中cookies文件中的cookies解析出来并一同提交?


就只要最后一步：

//解析到了Cookie，再进行请求
myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
myHttpWebRequest.CookieContainer = myCookieContainer;//*解析到的CookieContainer
myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
myHttpWebResponse.Cookies = myCookieContainer.GetCookies(myHttpWebRequest.RequestUri);
myResponseStream = myHttpWebResponse.GetResponseStream();
myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("gb2312"));
outdata = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
Console.WriteLine(outdata);