/// <summary>
/// The handler for HTTP POST requests.
/// TODO: This code has not been tested. It should work, right? I mean, what could possibly go wrong?
/// </summary>
/// <param name="processor">The HTTP processor.</param>
public void HttpPostHandler(HttpProcessor processor)
{
string data = string.Empty;
do
{
int next = processor.StreamInput.ReadByte();
if (next == -1) break;
data += Convert.ToChar(next);
}
while (true);
processor.WriteLine("<html>A post? Thank you. I needed that.</html>");
}
/// <summary>
/// Begin listening.
/// </summary>
public void Start()
{
this.listener = new TcpListener(this.Address, this.Port);
this.listener.Start();
this.Active = true;
while (this.Active)
{
TcpClient s = this.listener.AcceptTcpClient();
HttpProcessor processor = new HttpProcessor(s, this);
Thread thread = new Thread(new ThreadStart(processor.Process));
thread.Start();
Thread.Sleep(1);
}
this.listener.Stop();
}
/// <summary>
/// The handler for HTTP GET requests.
/// </summary>
/// <param name="processor">The HTTP processor.</param>
public void HttpGetHandler(HttpProcessor processor)
{
processor.WriteSuccess();
Cryptkeeper myCrypt = new Cryptkeeper(this.passphrase);
DerivedValue derived = new DerivedValue(this.passphrase);
string result = derived.GetString(3, 10);
// No result? No handshake. Done.
if (processor.RequestURL.IndexOf(result) == -1) return;
// Parse out the host name and fetch the next page.
string hostname = string.Empty;
string absolutePath = processor.RequestURL;
string[] values = absolutePath.Split(new string[] { result }, StringSplitOptions.RemoveEmptyEntries);
absolutePath = values[0].Trim();
string hostBase64 = values[1].Trim();
byte[] hostBytes = System.Convert.FromBase64String(hostBase64);
hostname = Encoding.ASCII.GetString(hostBytes);
Uri link = new Uri(string.Concat("http://", hostname, absolutePath));
try
{
WebClient web = new WebClient();
byte[] page = web.DownloadData(link);
web.Dispose();
WebPageSteganography stegopage = new WebPageSteganography(page, this.passphrase);
string message = string.Empty;
if (this.MessageQueue.Count > 0)
{
message = (string)this.MessageQueue.Dequeue();
}
stegopage.WriteValue(message);
page = stegopage.GetBytes();
processor.StreamOutput.Write(page);
processor.StreamOutput.Flush();
processor.WriteSuccess();
}
catch (Exception ex)
{
processor.StreamOutput.Write("<html><p>Ping! Something odd happened while retrieving ... " + link.ToString() + "</p><p>" + ex.ToString() + "</p></html>");
}
}
