自动登录DISCUZ，发帖的代码（部分）

有点无聊的东西，不是通用的，不过RD提供了我们论坛用的discuz的hashform的计算代码，也许通用的DISCUZ灌水机器人是我这种菜鸟也能搞出来的。
关于代码，没有什么技术含量，先用一个叫Ethereal的软件抓到提交的值，然后用.NET中对应的库即可完成。下面是主要的类：

 

class Robot
    {
        /**//// attributes
        // cookies
        private CookieCollection CkCollection = null;
        // request and response
        private HttpWebRequest SparkRequest = null;
        private HttpWebResponse SparkResponse = null;
        // some url
        private string LoginUrl = null;
        private string ReplyUrl = null;

        // constructer
        public Robot()
        {
            CkCollection = new CookieCollection();
        }

        // logining
        public string Login(string url, string usr,string pass)
        {
            string Return = null;
            this.LoginUrl = url;
            // may be I should add a functin for create string
            string loginstr = "formhash=3bd8bc0a&referer=index.php&loginmode=&styleid=&cookietime=2592000&loginfield=username&username=" + usr;
            loginstr += "&password=" + pass;
            loginstr += "&questionid=0&answer=&loginsubmit=提 交";
            loginstr = EncodePost(loginstr);
            byte[] replybyte = Encoding.UTF8.GetBytes(loginstr);
            
            try
            {
                CookieContainer sparkc = new CookieContainer();
                SparkRequest = (HttpWebRequest)WebRequest.Create(url);
                SparkRequest.CookieContainer = sparkc;
                SparkRequest.ContentType = "application/x-www-form-urlencoded";
                SparkRequest.Method = "POST";

                SparkRequest.ContentLength = replybyte.Length;
                Stream newStream = SparkRequest.GetRequestStream();
                newStream.Write(replybyte, 0, replybyte.Length);
                newStream.Close();

                SparkResponse = (HttpWebResponse)SparkRequest.GetResponse();
                Stream dataStream = SparkResponse.GetResponseStream();
                StreamReader reader = new StreamReader(dataStream, Encoding.GetEncoding("gb2312"));
                Return = reader.ReadToEnd();

                // check cookie
                foreach (Cookie temp in SparkResponse.Cookies)
                {
                    if (temp.Domain != "spark.cjlu.edu.cn")
                        temp.Domain = "spark.cjlu.edu.cn";
                }

                CkCollection = SparkResponse.Cookies;
            }
            catch
            {
                return null;
            }
            return Return;
        }

        // overload
        /**//*
        public bool Login(string usr, string pass)
        {
            ;
        }*/

        // reply……
        public string Reply(string url,string formhash,string title,string content)
        {
            SparkRequest = (HttpWebRequest)WebRequest.Create("http://spark.cjlu.edu.cn/bbs/"+url);
            SparkRequest.ContentType = "application/x-www-form-urlencoded";
            SparkRequest.Method = "POST";
            //SparkRequest.Referer = "http://spark.cjlu.edu.cn/bbs/index.php";
            SparkRequest.KeepAlive = true;
            SparkRequest.AllowWriteStreamBuffering = false;

            // set cookie
            CookieContainer cookieCon = new CookieContainer();
            SparkRequest.CookieContainer = cookieCon;
            SparkRequest.CookieContainer.Add(CkCollection);

            // get post value
            string reply = EncodePost("formhash=" + formhash + "&subject=&usesig=1&message=" + content);
            byte[] replybyte = Encoding.UTF8.GetBytes(reply);
            SparkRequest.ContentLength = replybyte.Length;
            Stream newStream = SparkRequest.GetRequestStream();
            newStream.Write(replybyte, 0, replybyte.Length);
            newStream.Close();

            // get response
            SparkResponse = (HttpWebResponse)SparkRequest.GetResponse();
            Stream dataStream = SparkResponse.GetResponseStream();
            StreamReader reader = new StreamReader(dataStream, Encoding.GetEncoding("gb2312"));
            string tt = reader.ReadToEnd();

            reader.Close();
            dataStream.Close();
            SparkResponse.Close();

            return tt;
        }

        // encode the post string
        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("gb2312"));
                        break;
                    }
                    string tt = HttpUtility.UrlEncode(input.Substring(i, j - i), System.Text.Encoding.GetEncoding("gb2312"));
                    output += tt;
                    output += input.Substring(j, 1);
                    i = j + 1;
                }
                return output;
            }
            else
                return null;
        }
    }