首先打开网站,查看源文件,找到他的登录表单部分。
比如:
<form name="login" action="loginMain.jsp" method="POST" target="_top"> <table width="218" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="50" height="28" class="hui"><div align="right">用户名:</div></td> <td width="168" height="28"><input class="hui" id="username" maxlength="40" size="23" name="username" id="username" /></td> </tr> <tr> <td height="28" class="hui"><div align="right">密 码:</div></td> <td height="28"><input class="hui" id="passwd" maxlength="40" size="23" name="passwd" type="password" id="passwd" /></td> </tr> </table> </form>
从以上表单可以看出,表单提交的方法是:POST,提交至loginMain.jsp处理,共有两个表单项即:username、passwd
下面是C#模仿登录程序:Login.cs
using System; using System.Data; using System.Net; using System.Text; using System.IO; using System.Text.RegularExpressions; /// <summary> /// 登录网站并获取Cookies /// </summary> /// <returns>成功登录的Cookie信息</returns> public static CookieContainer Get_Login() { CookieContainer cc = new CookieContainer(); string FormURL="http://blog.hnce.net/loginMain.jsp"; //处理表单的绝对URL地址 string FormData = "username=slick&passwd=hedy12345"; //表单需要提交的参数,注意改为你已注册的信息。 ASCIIEncoding encoding = new ASCIIEncoding(); byte[] data = encoding.GetBytes(FormData); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(FormURL); request.Method = "POST"; //数据提交方式 request.ContentType = "application/x-www-form-urlencoded"; request.ContentLength = data.Length; request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)"; //模拟一个UserAgent Stream newStream = request.GetRequestStream(); newStream.Write(data, 0, data.Length); newStream.Close(); request.CookieContainer = cc; HttpWebResponse response = (HttpWebResponse)request.GetResponse(); cc.Add(response.Cookies); Stream stream = response.GetResponseStream(); string WebContent = new StreamReader(stream, System.Text.Encoding.Default).ReadToEnd(); return cc; }
调用以上的方法来获取需要登录才能查看的内容。
CookieContainer cc = new CookieContainer(); cc = Login.Get_Login(); //获取登录Cookies string PhotoClassURL = "http://blog.hnce.net/xxx.jsp"; HttpWebRequest Myrequest = (HttpWebRequest)WebRequest.Create(PhotoClassURL); Myrequest.CookieContainer = cc; HttpWebResponse Myresponse = (HttpWebResponse)Myrequest.GetResponse(); cc.Add(Myresponse.Cookies); Stream Mystream = Myresponse.GetResponseStream(); string sHtml = new StreamReader(Mystream, System.Text.Encoding.Default).ReadToEnd();
sHtml即为你登录之后看到的内容