使用c#发送http请求实现模拟登陆实例"}（使用c#发送http请求实现模拟登陆实例"}）

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 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 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:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 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：

1 2 3 4 5 6 7 8 9 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(); }