winform模拟登陆网页_使用C#的HttpWebRequest模拟登陆网站

太过爱你忘了你带给我的痛 2023-01-09 12:50 145阅读 0赞

很久没有写新的东西了，今天在工作中遇到的一个问题，感觉很有用，有种想记下来的冲动。

这篇文章是有关模拟登录网站方面的。

实现步骤；

启用一个web会话

发送模拟数据请求(POST或者GET)

获取会话的CooKie 并根据该CooKie继续访问登录后的页面，获取后续访问的页面数据。

我们以登录人人网为例，首先需要分析人人网登录时POST的数据格式，这个可以通过IE9中只带的F12快捷键，调出开发人员工具。如下图：

![Image 1][]

通过开始捕获得到POST的地址和POST的数据

POST数据：

POST地址：

http://www.renren.com/PLogin.do

下面就是代码示例来得到登录后页面(http://guide.renren.com/guide)的数据

HTMLHelper类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Net;

using System.IO;

using System.Threading;

namespace Test

public class HTMLHelper

/// ///获取CooKie/// /// /// /// /// public static CookieContainer GetCooKie(string loginUrl, string postdata, HttpHeader header)

HttpWebRequest request = null;

HttpWebResponse response = null;

try

CookieContainer cc = new CookieContainer();

request = (HttpWebRequest)WebRequest.Create(loginUrl);

request.Method = header.method;

request.ContentType = header.contentType;

byte\[\] postdatabyte = Encoding.UTF8.GetBytes(postdata);

request.ContentLength = postdatabyte.Length;

request.AllowAutoRedirect = false;

request.CookieContainer = cc;

request.KeepAlive = true;

//提交请求 Stream stream;

stream = request.GetRequestStream();

stream.Write(postdatabyte, 0, postdatabyte.Length);

stream.Close();

//接收响应 response = (HttpWebResponse)request.GetResponse();

response.Cookies = request.CookieContainer.GetCookies(request.RequestUri);

CookieCollection cook = response.Cookies;

//Cookie字符串格式 string strcrook = request.CookieContainer.GetCookieHeader(request.RequestUri);

return cc;

catch (Exception ex)

throw ex;

/// ///获取html/// /// /// /// /// public static string GetHtml(string getUrl, CookieContainer cookieContainer,HttpHeader header)

Thread.Sleep(1000);

HttpWebRequest httpWebRequest = null;

HttpWebResponse httpWebResponse = null;

try

httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(getUrl);

httpWebRequest.CookieContainer = cookieContainer;

httpWebRequest.ContentType = header.contentType;

httpWebRequest.ServicePoint.ConnectionLimit = header.maxTry;

httpWebRequest.Referer = getUrl;

httpWebRequest.Accept = header.accept;

httpWebRequest.UserAgent = header.userAgent;

httpWebRequest.Method = "GET";

httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();

Stream responseStream = httpWebResponse.GetResponseStream();

StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);

string html = streamReader.ReadToEnd();

streamReader.Close();

responseStream.Close();

httpWebRequest.Abort();

httpWebResponse.Close();

return html;

catch (Exception e)

if (httpWebRequest != null) httpWebRequest.Abort();

if (httpWebResponse != null) httpWebResponse.Close();

return string.Empty;

public class HttpHeader

public string contentType \{ get; set; \}

public string accept \{ get; set; \}

public string userAgent \{ get; set; \}

public string method\{get;set;\}

public int maxTry \{ get; set; \}

测试用例：

HttpHeader header = new HttpHeader();

header.accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, \*/\*";

header.contentType = "application/x-www-form-urlencoded";

header.method = "POST";

header.userAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)";

header.maxTry = 300;

string html = HTMLHelper.GetHtml("http://guide.renren.com/guide", HTMLHelper.GetCooKie("http://www.renren.com/PLogin.do",

"email=aaa@163.com&password=111&icode=&origURL=http%3A%2F%2Fwww.renren.com%2Fhome&domain=renren.com&key\_id=1&\_rtk=90484476", header), header);

Console.WriteLine(html);

Console.ReadLine();

![Image 1][]

[Image 1]: