I can't create thread on PHPBB3 forum

Question

My problem is that I get 0 bytes response from server (I'm using Fiddler2 to check this out).

Picture:

What I'm doing:

1. Log in. I get cookies.
2. Creating thread

---

public void CreateTopic(string subject, string message, string forumId)
    {
        HttpWebResponse response = null;
        string source = string.Empty;
        string lastClick= string.Empty;
        string creationTime= string.Empty;
        string formToken = string.Empty;

        // GET
        while(true)
        {
            webRequest =
                (HttpWebRequest) HttpWebRequest.Create(Url + "posting.php?mode=post&f=" + forumId + "&sid=" + sid);
            webRequest.KeepAlive = true;
            webRequest.Method = "GET";
            webRequest.ContentType = "application/x-www-form-urlencoded";
            webRequest.Host = Url.Replace("http://", "").Replace("/", "");
            webRequest.CookieContainer = cookieJar;

            ServicePointManager.Expect100Continue = false;

            try
            {
                response = (HttpWebResponse) webRequest.GetResponse();
                UpdateSid(Url + "posting.php?mode=post&f=" + forumId + "&sid=" + sid);
            }
            catch (Exception ex)
            {
                continue;
            }
            break;
        }

        StreamReader streamReader = new StreamReader(response.GetResponseStream());
        source = streamReader.ReadToEnd();
        streamReader.Close();

        response.Close();

        // Get stuff
        // last click
        Match lastClickMatch = Regex.Match(source, "name=\"lastclick\" value=\"([0-9]{10})\" />");
        if (lastClickMatch.Success) lastClick = lastClickMatch.Groups[1].Value;

        // creation time
        Match creationTimeMatch = Regex.Match(source, "name=\"creation_time\" value=\"([0-9]{10})\" />");
        if (creationTimeMatch.Success) creationTime = creationTimeMatch.Groups[1].Value;

        // form token
        Match formTokenMatch = Regex.Match(source, "name=\"form_token\" value=\"(.{40})\" />");
        if (formTokenMatch.Success) formToken = formTokenMatch.Groups[1].Value;

        // POST
        webRequest = (HttpWebRequest)WebRequest.Create(Url + "posting.php?mode=post&f=" + forumId + "&sid=" + sid);
        webRequest.Method = "POST";
        webRequest.ContentType = "application/x-www-form-urlencoded";
        webRequest.Host = Url.Replace("http://", "").Replace("/", "");
        webRequest.CookieContainer = cookieJar;
        string data = "icon=&subject=" + Encode(subject) + "&addbbcode20=100&message=" + Encode(message) + "&attach_sig=on&post=Submit&lastclick=" + lastClick + "&creation_time=" + creationTime + "&form_token=" + formToken;

        byte[] byte1 = Encoding.UTF8.GetBytes(data);
        webRequest.ContentLength = byte1.Length;

        ServicePointManager.Expect100Continue = false;

        Stream stream = webRequest.GetRequestStream();
        stream.Write(byte1, 0, byte1.Length);
        stream.Close();

        response = (HttpWebResponse)webRequest.GetResponse();

        UpdateSid(Url + "posting.php?mode=post&f=" + forumId + "&sid=" + sid);

        response.Close();
    }

I get this on fiddler: RAW:

POST http://stuff.com/posting.php?mode=post&f=8&sid=6d278be1e705fe0261f253bbc96ab7a4
HTTP/1.1 Content-Type: application/x-www-form-urlencoded 
Host: stuff.com 
Cookie: phpbb3_goeyz_u=55443;phpbb3_goeyz_k=;phpbb3_goeyz_sid=6d278be1e705fe0261f253bbc96ab7a4 
Content-Length: 165

icon=&subject=g&addbbcode20=100&message=d&attach_sig=on&post=Submit&lastclick=1323904393&creation_time=1323904393&form_token=b81c23e308f0bd3a0a73907efcc8c18e5dba0f7f

Response RAW:

HTTP/1.1 302 Found 
Date: Wed, 14 Dec 2011 23:13:14 GMT 
Server: Apache/2.2.14 (Ubuntu) 
X-Powered-By: PHP/5.3.2-1ubuntu4.10 
Location: http://stuff.com/games.html 
Vary: Accept-Encoding
Content-Length: 0 
Connection: close 
Content-Type: text/html

I have no idea what is going on. If you will help me I will be grateful. I'm sorry for my English.

Answer 1

I found out why it didn't create thread. It checks:

if ($user->data['is_bot'])

If you don't want to be a bot, then you have to WAIT for like 8 seconds before sending POST:

Thread.Sleep(8100);

It resolved all problems for me.