c# winform实现网页上用户自动登陆,模拟网站登录

using System;

using System.Collections.Generic;

using System.Text;

using System.Net;

using System.IO;

 

namespace Czt.Web

{

    /// <summary>

    /// 实现网站登录类

    /// </summary>

    public class Post

    {

        /// <summary>

        /// 网站Cookies

        /// </summary>

        private string _cookieHeader = string.Empty;

        public string CookieHeader

        {

            get

            {

                return _cookieHeader;

            }

            set

            {

                _cookieHeader = value;

            }

        }

        /// <summary>

        /// 网站编码

        /// </summary>

        private string _code = string.Empty;

        public string Code

        {

            get { return _code; }

            set { _code = value; }

        }

 

  

        private string _pageContent = string.Empty;

        public string PageContent

        {

            get { return _pageContent; }

            set { _pageContent = value; }

        }

 

        private Dictionary<string, string> _para = new Dictionary<string, string>();

        public Dictionary<string, string> Para

        {

            get { return _para; }

            set { _para = value; }

        }

 

  

        /**/

        /// <summary>

        /// 功能描述：模拟登录页面，提交登录数据进行登录，并记录Header中的cookie

        /// </summary>

        /// <param name="strURL">登录数据提交的页面地址</param>

        /// <param name="strArgs">用户登录数据</param>

        /// <param name="strReferer">引用地址</param>

        /// <param name="code">网站编码</param>

        /// <returns>可以返回页面内容或不返回</returns>

        public string PostData(string strURL, string strArgs, string strReferer, string code, string method)

        {

            return  PostData(strURL,  strArgs,  strReferer,  code,  method, string.Empty);

        }

        public string PostData(string strURL, string strArgs, string strReferer, string code, string method, string contentType)

        {

            try

            {

                string strResult = "";

                HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strURL);

                myHttpWebRequest.AllowAutoRedirect = true;

                myHttpWebRequest.KeepAlive = true;

                myHttpWebRequest.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/msword, application/x-shockwave-flash, */*";

                myHttpWebRequest.Referer = strReferer;

 

  

                myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 2.0.50727)";

 

                if (string.IsNullOrEmpty(contentType))

                {

                    myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";

                }

                else

                {

                    myHttpWebRequest.ContentType = "contentType";

                }

 

                myHttpWebRequest.Method = method;

 

                myHttpWebRequest.Headers.Add("Accept-Encoding", "gzip, deflate");

 

                if (myHttpWebRequest.CookieContainer == null)

                {

                    myHttpWebRequest.CookieContainer = new CookieContainer();

                }

 

                if (this.CookieHeader.Length > 0)

                {

                    myHttpWebRequest.Headers.Add("cookie:" + this.CookieHeader);

                    myHttpWebRequest.CookieContainer.SetCookies(new Uri(strURL), this.CookieHeader);

                }

 

  

 

                byte[] postData = Encoding.GetEncoding(code).GetBytes(strArgs);

                myHttpWebRequest.ContentLength = postData.Length;

 

                System.IO.Stream PostStream = myHttpWebRequest.GetRequestStream();

                PostStream.Write(postData, 0, postData.Length);

                PostStream.Close();

 

                HttpWebResponse response = null;

                System.IO.StreamReader sr = null;

                response = (HttpWebResponse)myHttpWebRequest.GetResponse();

 

  

 

                if (myHttpWebRequest.CookieContainer != null)

                {

                    this.CookieHeader = myHttpWebRequest.CookieContainer.GetCookieHeader(new Uri(strURL));

                }

 

                sr = new System.IO.StreamReader(response.GetResponseStream(), Encoding.GetEncoding(code));    //    //utf-8

                strResult = sr.ReadToEnd();

                sr.Close();

                response.Close();

                return strResult;

            }

            catch (Exception ex)

            {

                Utilities.Document.Create("C:\\error.log", strArgs, true, Encoding.UTF8);

            }

            return string.Empty;

        }

 

        /**/

        /// <summary>

        /// 功能描述：在PostLogin成功登录后记录下Headers中的cookie，然后获取此网站上其他页面的内容

        /// </summary>

        /// <param name="strURL">获取网站的某页面的地址</param>

        /// <param name="strReferer">引用的地址</param>

        /// <returns>返回页面内容</returns>

        public string GetPage(string strURL, string strReferer, string code)

        {

            return GetPage(strURL, strReferer,code,string.Empty);

        }

        public string GetPage(string strURL, string strReferer,string code,string contentType)

        {

            string strResult = "";

            HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strURL);

            myHttpWebRequest.AllowAutoRedirect = true;

            myHttpWebRequest.KeepAlive = false;

            myHttpWebRequest.Accept = "*/*";

            myHttpWebRequest.Referer = strReferer;

            myHttpWebRequest.Headers.Add("Accept-Encoding", "gzip, deflate");

 

            myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 2.0.50727)";

            if (string.IsNullOrEmpty(contentType))

            {

                myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";

            }

            else

            {

                myHttpWebRequest.ContentType = contentType;

            }

            myHttpWebRequest.Method = "GET";

 

            if (myHttpWebRequest.CookieContainer == null)

            {

                myHttpWebRequest.CookieContainer = new CookieContainer();

            }

 

            if (this.CookieHeader.Length > 0)

            {

                myHttpWebRequest.Headers.Add("cookie:" + this.CookieHeader);

                myHttpWebRequest.CookieContainer.SetCookies(new Uri(strURL), this.CookieHeader);

            }

 

  

            HttpWebResponse response = null;

            System.IO.StreamReader sr = null;

            response = (HttpWebResponse)myHttpWebRequest.GetResponse();

 

  

            Stream streamReceive;

            string gzip = response.ContentEncoding;

 

            if (string.IsNullOrEmpty(gzip) || gzip.ToLower() != "gzip")

            {

                streamReceive = response.GetResponseStream();

            }

            else

            {

                streamReceive = new System.IO.Compression.GZipStream(response.GetResponseStream(), System.IO.Compression.CompressionMode.Decompress);

            }

 

            sr = new System.IO.StreamReader(streamReceive, Encoding.GetEncoding(code));

 

            if (response.ContentLength > 1)

            {

                strResult = sr.ReadToEnd();

            }

            else

            {

                char[] buffer=new char[256];

                int count = 0;

                StringBuilder sb = new StringBuilder();

                while ((count = sr.Read(buffer, 0, buffer.Length)) > 0)

                {

                    sb.Append(new string(buffer));

                }

                strResult = sb.ToString();

            }

            sr.Close();

            response.Close();

            return strResult;

        }

 

    }

}