一个登录论坛并上传帖子和文件的代码

以前的，现在准备删除，就这里存档了的。一般获取网页和登录用得着的。

 下载地址:https://files.cnblogs.com/rq204/%E7%99%BB%E5%BD%95%E8%AE%BA%E5%9D%9B%E5%B9%B6%E5%8F%91%E8%A1%A8%E5%B8%96%E5%AD%90%E7%9A%84%E4%BB%A3%E7%A0%81.rar

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace BBSEasy
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private System.Net.CookieCollection cookie = new System.Net.CookieCollection();

        private void btnLogin_Click(object sender, EventArgs e)
        {
            if (this.tbPassword.Text == "" || this.tbUserName.Text == "") return;

            string posturl = "http://www.aippt.cn/member.php?mod=logging&action=login&loginsubmit=yes&infloat=yes&lssubmit=yes&inajax=1";
            System.Net.HttpWebRequest request = this.CreateHttp(posturl);
            string postdata = "username=" + ed(this.tbUserName.Text) + "&cookietime=2592000&password=" + ed(this.tbPassword.Text) + "&quickforward=yes&handlekey=ls";

            byte[] bt = System.Text.Encoding.UTF8.GetBytes(postdata);
            request.ContentLength = bt.Length;
            System.IO.Stream sm = request.GetRequestStream();
            sm.Write(bt, 0, bt.Length);
            sm.Close();
            System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
            string html = this.GetHtml(response);

            if (html.Contains("window.location.href='http://www.aippt.cn/';<"))
            {
                this.cookie = response.Cookies;
                MessageBox.Show("登录成功");
            }
            else
            {
                MessageBox.Show(html, "登录失败");
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Multiselect = true;
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                this.tbFile.Tag = ofd.FileNames;
                this.tbFile.Clear();
                foreach (string f in ofd.FileNames)
                {
                    this.tbFile.Text += f + ";";
                }
            }
        }

        private string ed(string s)
        {
            return System.Web.HttpUtility.UrlEncode(s, System.Text.Encoding.UTF8);
        }

        private void btnPost_Click(object sender, EventArgs e)
        {
            if (this.tbTitle.Text == "" || this.tbContent.Text == "" || this.tbFid.Text == "") return;

            string fidurl = "http://www.aippt.cn/forum.php?mod=post&action=newthread&fid=" + this.tbFid.Text;
            System.Net.HttpWebRequest hwr = this.CreateHttp(fidurl);
            hwr.Method = "GET";
            hwr.CookieContainer = new System.Net.CookieContainer();
            hwr.CookieContainer.Add(this.cookie);

            System.Net.HttpWebResponse hwrs = (System.Net.HttpWebResponse)hwr.GetResponse();
            string html = this.GetHtml(hwrs);
            string formhash = this.getInput(html, ""formhash");
            string posttime = this.getInput(html, "posttime");
            string hash = this.getInput(html, ""hash");
            string uid = this.getInput(html, ""uid");

            string posturl = "http://www.aippt.cn/forum.php?mod=post&action=newthread&fid=" + this.tbFid.Text + "&extra=&topicsubmit=yes";
            System.Net.HttpWebRequest request = this.CreateHttp(posturl);
            request.CookieContainer = new System.Net.CookieContainer();
            request.CookieContainer.Add(this.cookie);
            request.AllowAutoRedirect = false;
            string postdata = "formhash=" + formhash + "&posttime=" + posttime + "&wysiwyg=1&subject=" + ed(this.tbTitle.Text) + "&message=" + ed(this.tbContent.Text) + "&replycredit_extcredits=0&replycredit_times=1&replycredit_membertimes=1&replycredit_random=100&tags=&save=&uploadalbum=-2&albumcatid=1&newalbum=%E8%AF%B7%E8%BE%93%E5%85%A5%E7%9B%B8%E5%86%8C%E5%90%8D%E7%A7%B0&usesig=1&allownoticeauthor=1";

            if (this.tbFile.Tag != null)
            {
                string[] files = (string[])this.tbFile.Tag;
                foreach (string ff in files)
                {
                    try
                    {
                        string aid = this.UploadFile(ff, this.tbFid.Text, uid, hash);
                        postdata += "&" + ed("attachnew[" + aid + "][description]") + "=" + ed(System.IO.Path.GetFileName(ff));
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                        return;
                    }
                }
            }

            byte[] bt = System.Text.Encoding.UTF8.GetBytes(postdata);
            request.ContentLength = bt.Length;
            System.IO.Stream sm = request.GetRequestStream();
            sm.Write(bt, 0, bt.Length);
            sm.Close();
            System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();

            html = this.GetHtml(response);

            if (response.StatusCode == System.Net.HttpStatusCode.Moved)
            {
                MessageBox.Show("发布成功");
            }
            else
            {
                MessageBox.Show(html, "发布失败");
            }
        }

        private string getInput(string html, string name)
        {
            string start = name + "" value="";
            int pos = html.IndexOf(start);
            if (pos > 0)
            {
                int pos2 = html.IndexOf(""", pos + start.Length);
                if (pos2 > 0)
                {
                    return html.Substring(pos + start.Length, pos2 - pos - start.Length);
                }
            }
            return "";
        }

        private System.Net.HttpWebRequest CreateHttp(string url)
        {
            System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
            request.Method = "POST";
            request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20100101 Firefox/16.0";
            request.Proxy = System.Net.HttpWebRequest.GetSystemWebProxy();
            request.Referer = "http://www.aippt.cn/";
            request.CookieContainer = new System.Net.CookieContainer();
            request.ServicePoint.Expect100Continue = false;
            request.ContentType = "application/x-www-form-urlencoded";
            request.AutomaticDecompression = System.Net.DecompressionMethods.GZip;
            request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20100101 Firefox/16.0";
            request.Proxy = System.Net.HttpWebRequest.GetSystemWebProxy();
            request.Referer = "http://www.aippt.cn/";
            request.ServicePoint.Expect100Continue = false;
            request.ContentType = "application/x-www-form-urlencoded";
            request.AutomaticDecompression = System.Net.DecompressionMethods.GZip;
            return request;
        }

        private string GetHtml(System.Net.HttpWebResponse response)
        {
            System.IO.Stream rsm = response.GetResponseStream();
            System.IO.StreamReader sr = new System.IO.StreamReader(rsm, System.Text.Encoding.UTF8);
            string html = sr.ReadToEnd();
            sr.Close();
            rsm.Close();
            return html;
        }


        private string UploadFile(string path, string fid, string uid, string hash)
        {
            string posturl = "http://www.aippt.cn/misc.php?mod=swfupload&action=swfupload&operation=upload&fid=" + fid;
            System.Net.HttpWebRequest request = this.CreateHttp(posturl);
            string boundary = "----------haveggoodday343450";
            request.ContentType = "multipart/form-data; boundary=" + boundary;
            request.UserAgent = "Shockwave Flash";
            request.CookieContainer = new System.Net.CookieContainer();
            request.CookieContainer.Add(this.cookie);
            Dictionary<string, string> dic = new Dictionary<string, string>();
            dic.Add("Filename", System.IO.Path.GetFileName(path));
            dic.Add("uid", uid);
            dic.Add("hash", hash);
            dic.Add("Upload", "Submit Query");
            dic.Add("filetype", System.IO.Path.GetExtension(path));

            StringBuilder sb = new StringBuilder();
            foreach (KeyValuePair<string, string> kv in dic)
            {
                sb.Append("--").Append(boundary).Append("
").Append("Content-Disposition: form-data; name="" + kv.Key + ""

").Append(ed(kv.Value)).Append("
");
            }

            sb.Append("--").Append(boundary).Append("
Content-Disposition: form-data; name="Filedata"; filename="").Append(System.IO.Path.GetFileName(path)).Append(""
Content-Type: application/octet-stream

");

            byte[] bt1 = System.Text.Encoding.UTF8.GetBytes(sb.ToString());


            System.IO.FileStream fs = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read);
            byte[] bt2 = new byte[fs.Length];
            fs.Read(bt2, 0, Convert.ToInt32(fs.Length));

            byte[] bt3 = System.Text.Encoding.UTF8.GetBytes("
--" + boundary + "--
");
            byte[] bt = new byte[bt1.Length + bt2.Length + bt3.Length];
            bt1.CopyTo(bt, 0);
            bt2.CopyTo(bt, bt1.Length);
            bt3.CopyTo(bt, bt1.Length + bt2.Length);
            fs.Close();

            request.ContentLength = bt.Length;
            System.IO.Stream sm = request.GetRequestStream();
            sm.Write(bt, 0, bt.Length);
            sm.Close();
            System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
            string html = this.GetHtml(response);
            if (System.Text.RegularExpressions.Regex.IsMatch(html, "^\d+$"))
            {
                return html;
            }
            else throw new Exception("上传文件失败" + html);
        }
    }
}