模拟登陆的原理很简单,就是发送一个Http 请求服务器获得响应,然后客户端获取到cookie即可实现模拟登陆,比如一些抢票软件的原理无非也是这样模拟客户端的cookie 然后发送请求去抢票,然后12306 本文将演示如何用C# 来实现模拟登陆的,推荐一款工具Fiddler,这是一款监听http 请求的利器。废话不多说,我就以博客园为例来实现模拟登陆。首先我登陆博客园 http://passport.cnblogs.com/login.aspx 输入用户名和密码点登陆 就会看到Fiddler 上的相关信息:
Ok,我首先需要发送一个http 请求 ,这个请求时POST的方式,然后用户名和密码就是POST的数据。代码如下:
1 static CookieContainer GetCookie(string postString, string postUrl) 2 { 3 4 CookieContainer cookie = new CookieContainer(); 5 6 HttpWebRequest httpRequset = (HttpWebRequest)HttpWebRequest.Create(postUrl);//创建http 请求 7 httpRequset.CookieContainer = cookie;//设置cookie 8 httpRequset.Method = "POST";//POST 提交 9 httpRequset.KeepAlive = true; 10 httpRequset.UserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko"; 11 httpRequset.Accept = "text/html, application/xhtml+xml, */*"; 12 httpRequset.ContentType = "application/x-www-form-urlencoded";//以上信息在监听请求的时候都有的直接复制过来 13 byte[] bytes = System.Text.Encoding.UTF8.GetBytes(postString); 14 httpRequset.ContentLength = bytes.Length; 15 Stream stream = httpRequset.GetRequestStream(); 16 stream.Write(bytes, 0, bytes.Length); 17 stream.Close();//以上是POST数据的写入 18 19 HttpWebResponse httpResponse = (HttpWebResponse)httpRequset.GetResponse();//获得 服务端响应 20 return cookie;//拿到cookie 21 }
拿到cookie 之后我们就可以以用户的什么去用户的后台或者其他的地方:
1 static string GetContent(CookieContainer cookie, string url) 2 { 3 string content; 4 HttpWebRequest httpRequest = (HttpWebRequest)HttpWebRequest.Create(url); 5 httpRequest.CookieContainer = cookie; 6 httpRequest.Referer = url; 7 httpRequest.UserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko"; 8 httpRequest.Accept = "text/html, application/xhtml+xml, */*"; 9 httpRequest.ContentType = "application/x-www-form-urlencoded"; 10 httpRequest.Method = "GET"; 11 12 HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse(); 13 14 using (Stream responsestream = httpResponse.GetResponseStream()) 15 { 16 17 using (StreamReader sr = new StreamReader(responsestream, System.Text.Encoding.UTF8)) 18 { 19 content = sr.ReadToEnd(); 20 } 21 } 22 23 return content; 24 }
OK 下面是调用 我写的是一个控制台程序:
1 1 static void Main(string[] args) 2 2 { 3 3 string loginstr = "{要post 的登陆数据包括用户名和密码}"; 4 4 5 5 //从登陆的地址获取cookie 6 6 CookieContainer cookie = GetCookie(loginstr, "http://passport.cnblogs.com/login.aspx"); 7 7 8 8 //这个是进入后台地址 9 9 Console.WriteLine(GetContent(cookie, "http://i.cnblogs.com/EditPosts.aspx")); 10 10 11 11 Console.Read(); 12 12 }
可以看到我已经进入了后台了:
如果我是没有登陆的情况下进入这个地址是这样的:
下次我就写一下怎么在模拟登陆之后发送http 请求实现添加删除这些效果。