using System; using System.Net; using System.IO; using System.Text; class Test { [STAThread] static void Main(string[] args) { // // TODO: 在此处添加代码以启动应用程序 // string url = "http://localhost/csdn2/1.asp"; // <% // if request("aa")="zhuye" then session("ok")="ok" // if session("ok")="ok" then // response.write("登录") // else // response.write("没有登录") // end if // %> string indata = "aa=zhuye"; 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.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); //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.RequestUri); 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" } }
注释写得很明确了,不多罗嗦了。
补充:如果是以get方式登录的话,直接修改url就可以了,indate可以不写任何东西。(不要去修改myHttpWebRequest.Method为GET),比如把asp文件修改为if request.querystring("aa")="zhuye" then session("ok")="ok",只要修改url为string url="http://localhost/csdn2/1.asp?aa=zhuye";即可。