C#自动登录DiscuzNT论坛并发帖

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Web;

namespace Malicious
{
    public partial class Form1 : Form
    {
        private readonly string BBSURL = "http://bbs.XXXXX.com";
        private readonly string USERNAME = "Malicious";
        private readonly string PASSWORD = "123456";

        private CookieCollection gCookieCollention = null;
        private HttpWebRequest BBSRequest = null;
        private HttpWebResponse BBSResponse = null;
        public Form1()
        {
            InitializeComponent();
        }

        private void startBtn_Click(object sender, EventArgs e)
        {
            string loginUrl = string.Format("{0}/login.aspx ", BBSURL);
            RemoveCookies();
            MaliciousLogin(loginUrl, USERNAME, PASSWORD);
            startBtn.Enabled = false;
        }
        /// <summary>
        /// 自动登录
        /// </summary>
        public void MaliciousLogin(string loginUrl, string usr, string pwd)
        {
            string responseHTML = string.Empty; ;
            string loginstr = string.Format("username={0}&password={1}&question=0&answer=&expires=43200&templateid=0&login=%E7%99%BB%E5%BD%95", usr, pwd);
            loginstr = EncodePost(loginstr);
            byte[] replybyte = Encoding.UTF8.GetBytes(loginstr);

            try
            {
                CookieContainer _cookieContainer = new CookieContainer();
                BBSRequest = (HttpWebRequest)WebRequest.Create(loginUrl);
                BBSRequest.CookieContainer = _cookieContainer;
                BBSRequest.ContentType = "application/x-www-form-urlencoded";
                BBSRequest.Method = "POST";
                //post 开始
                BBSRequest.ContentLength = replybyte.Length;
                Stream newStream = BBSRequest.GetRequestStream();
                newStream.Write(replybyte, 0, replybyte.Length);
                newStream.Close();
                //post 结束

                //返回HTML
                BBSResponse = (HttpWebResponse)BBSRequest.GetResponse();
                Stream dataStream = BBSResponse.GetResponseStream();
                StreamReader reader = new StreamReader(dataStream, Encoding.GetEncoding("utf-8"));
                responseHTML = reader.ReadToEnd();

  

                gCookieCollention = BBSResponse.Cookies;
                if (responseHTML.IndexOf("登录成功") > 0)
                    MessageBox.Show("Login successful");
                else
                    MessageBox.Show(responseHTML);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }


        }
        /// <summary>
        /// post 帖子
        /// </summary>
        private void PostTopic(string forumid, string title, string content)
        {

            try
            {
                BBSRequest = (HttpWebRequest)WebRequest.Create(string.Format("{0}/posttopic.aspx?forumid={1}", BBSURL,forumid));
                BBSRequest.ContentType = "application/x-www-form-urlencoded";
                BBSRequest.Method = "POST";
                BBSRequest.Referer = string.Format("{0}/posttopic.aspx?forumid={1}", BBSURL, forumid);
                BBSRequest.KeepAlive = true;
                BBSRequest.AllowWriteStreamBuffering = false;
                BBSRequest.ContentType = "multipart/form-data; boundary=---------------------------7d8182810472";

                CookieContainer cookieCon = new CookieContainer();
                BBSRequest.CookieContainer = cookieCon;
                BBSRequest.CookieContainer.Add(gCookieCollention);


                string topicStr = BuildPostContent(title, content);

                // string topic = EncodePost(topicStr);
                string topic = topicStr;

                byte[] replybyte = Encoding.UTF8.GetBytes(topic);
                BBSRequest.ContentLength = replybyte.Length;
                Stream newStream = BBSRequest.GetRequestStream();
                newStream.Write(replybyte, 0, replybyte.Length);
                newStream.Close();

                // get response
                BBSResponse = (HttpWebResponse)BBSRequest.GetResponse();
                Stream dataStream = BBSResponse.GetResponseStream();
                StreamReader reader = new StreamReader(dataStream, Encoding.GetEncoding("utf-8"));
                string responseHTML = reader.ReadToEnd();

                reader.Close();
                dataStream.Close();
                BBSResponse.Close();
                if (responseHTML.IndexOf("发表主题成功") > 0)
                    MessageBox.Show("发表主题成功!");
                else
                    MessageBox.Show(responseHTML);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
        private string BuildPostContent(string title, string message)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"temppassword\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(Environment.NewLine);
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"question\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"answer\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(Environment.NewLine);
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"title\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(title + "\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"iconid\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"usesig\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("1\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"posteditor_mediatyperadio\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("on\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"message\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(message + "\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"sposteditor_mode\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"restoredata\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("恢复数据\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"previewbutton\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("预览帖子\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"postfile\"; filename=\"\"\r\n");
            sb.Append("Content-Type: application/octet-stream\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(Environment.NewLine);
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"localid\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(Environment.NewLine);
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"readperm\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"attachdesc\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(Environment.NewLine);
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"albums\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"postfile\"; filename=\"\"\r\n");
            sb.Append("Content-Type: application/octet-stream\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(Environment.NewLine);
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"localid\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("1\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"readperm\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"attachdesc\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append(Environment.NewLine);
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"albums\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"topicreadperm\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append(BoundaryString);
            sb.Append("Content-Disposition: form-data; name=\"postbytopictype\"\r\n");
            sb.Append(Environment.NewLine);
            sb.Append("0\r\n");
            sb.Append("-----------------------------7d8182810472--");
            sb.Append(Environment.NewLine);
            return sb.ToString();
        }
        private string BoundaryString
        {
            get { return "-----------------------------7d8182810472\r\n"; }
        }
        private string EncodePost(string input)
        {
            string output = null;
            Char[] reserved = { '?', '=', '&' };
            if (input != null)
            {
                int i = 0, j;
                while (i < input.Length)
                {
                    j = input.IndexOfAny(reserved, i);
                    if (j == -1)
                    {
                        output = output + HttpUtility.UrlEncode(input.Substring(i, input.Length - i), System.Text.Encoding.GetEncoding("utf-8"));
                        break;
                    }
                    string tt = HttpUtility.UrlEncode(input.Substring(i, j - i), System.Text.Encoding.GetEncoding("utf-8"));
                    output += tt;
                    output += input.Substring(j, 1);
                    i = j + 1;
                }
                return output;
            }
            else
                return null;
        }

        private void btnPost_Click(object sender, EventArgs e)
        {
            string forumid = txtForumID.Text.Trim();
            string title = txtTitle.Text.Trim();
            string content = txtContent.Text.Trim();
            PostTopic(forumid, title, content);
        }
        private void RemoveCookies()
        {
            int cookiesmax = Environment.GetFolderPath(Environment.SpecialFolder.Cookies).Length;
            for (int i = 0; i < cookiesmax; i++)
                Environment.GetFolderPath(Environment.SpecialFolder.Cookies).Remove(0);
        }
    }
}