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使用C#發(fā)送Http請(qǐng)求實(shí)現(xiàn)模擬登陸實(shí)例

更新時(shí)間：2016年10月20日 10:32:22 作者：云帆濟(jì)滄海

本文主要介紹了使用C#發(fā)送Http請(qǐng)求實(shí)現(xiàn)模擬登陸實(shí)例,模擬登陸的原理簡(jiǎn)單，想要了解的朋友可以了解一下。

模擬登陸的原理很簡(jiǎn)單，就是發(fā)送一個(gè)Http 請(qǐng)求服務(wù)器獲得響應(yīng)，然后客戶端獲取到cookie即可實(shí)現(xiàn)模擬登陸，比如一些搶票軟件的原理無(wú)非也是這樣模擬客戶端的cookie 然后發(fā)送請(qǐng)求去搶票，然后12306 本文將演示如何用C# 來(lái)實(shí)現(xiàn)模擬登陸的，推薦一款工具Fiddler，這是一款監(jiān)聽(tīng)http 請(qǐng)求的利器。廢話不多說(shuō)，我就以博客園為例來(lái)實(shí)現(xiàn)模擬登陸。首先我登陸博客園 http://passport.cnblogs.com/login.aspx 輸入用戶名和密碼點(diǎn)登陸就會(huì)看到Fiddler 上的相關(guān)信息：

Ok，我首先需要發(fā)送一個(gè)http 請(qǐng)求，這個(gè)請(qǐng)求時(shí)POST的方式，然后用戶名和密碼就是POST的數(shù)據(jù)。代碼如下：

static CookieContainer GetCookie(string postString, string postUrl)
 {
 CookieContainer cookie = new CookieContainer();
 
 HttpWebRequest httpRequset = (HttpWebRequest)HttpWebRequest.Create(postUrl);//創(chuàng)建http 請(qǐng)求
httpRequset.CookieContainer = cookie;//設(shè)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";//以上信息在監(jiān)聽(tīng)請(qǐng)求的時(shí)候都有的直接復(fù)制過(guò)來(lái)
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數(shù)據(jù)的寫(xiě)入
 HttpWebResponse httpResponse = (HttpWebResponse)httpRequset.GetResponse();//獲得 服務(wù)端響應(yīng)
 return cookie;//拿到cookie
 }

拿到cookie 之后我們就可以以用戶的什么去用戶的后臺(tái)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 下面是調(diào)用我寫(xiě)的是一個(gè)控制臺(tái)程序：

static void Main(string[] args)
{
string loginstr = "{要post 的登陸數(shù)據(jù)包括用戶名和密碼}";
//從登陸的地址獲取cookie
CookieContainer cookie = GetCookie(loginstr, "http://passport.cnblogs.com/login.aspx");
 //這個(gè)是進(jìn)入后臺(tái)地址
 Console.WriteLine(GetContent(cookie, "http://i.cnblogs.com/EditPosts.aspx"));
 Console.Read();
}

可以看到我已經(jīng)進(jìn)入了后臺(tái)了：