使用C#发送Http请求实现模拟登陆实例
时间:2021-10-18 10:05:52|栏目:.NET代码|点击: 次
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:
static CookieContainer GetCookie(string postString, string postUrl) { CookieContainer cookie = new CookieContainer(); HttpWebRequest httpRequset = (HttpWebRequest)HttpWebRequest.Create(postUrl);//创建http 请求 httpRequset.CookieContainer = cookie;//设置cookie httpRequset.Method = "POST";//POST 提交 httpRequset.KeepAlive = true; httpRequset.UserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko"; httpRequset.Accept = "text/html, application/xhtml+xml, */*"; 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 byte[] bytes = System.Text.Encoding.UTF8.GetBytes(postString); httpRequset.ContentLength = bytes.Length; Stream stream = httpRequset.GetRequestStream(); stream.Write(bytes, 0, bytes.Length); stream.Close();//以上是POST数据的写入 HttpWebResponse httpResponse = (HttpWebResponse)httpRequset.GetResponse();//获得 服务端响应 return cookie;//拿到cookie }
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:
static string GetContent(CookieContainer cookie, string url) { string content; HttpWebRequest httpRequest = (HttpWebRequest)HttpWebRequest.Create(url); httpRequest.CookieContainer = cookie; httpRequest.Referer = url; httpRequest.UserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko"; httpRequest.Accept = "text/html, application/xhtml+xml, */*"; httpRequest.ContentType = "application/x-www-form-urlencoded"; httpRequest.Method = "GET"; HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse(); using (Stream responsestream = httpResponse.GetResponseStream()) { using (StreamReader sr = new StreamReader(responsestream, System.Text.Encoding.UTF8)) { content = sr.ReadToEnd(); } } return content; }
OK 下面是调用 我写的是一个控制台程序:
static void Main(string[] args) { string loginstr = "{要post 的登陆数据包括用户名和密码}"; //从登陆的地址获取cookie CookieContainer cookie = GetCookie(loginstr, "http://passport.cnblogs.com/login.aspx"); //这个是进入后台地址 Console.WriteLine(GetContent(cookie, "http://i.cnblogs.com/EditPosts.aspx")); Console.Read(); }
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:
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