private void action_send_media()
{
var s = _readdata.Split(':');
var name = "";
if (s.Length == 3)
{
name = s[2];
}
TcpClient t = null;
if (_chatserver.FindUserRoom(name) != 0)
{
t = (TcpClient)_chatserver.ClientConnections[name.ToUpper()];
}
if (t != null)
{
_chatserver.Write(_client.GetStream(), ChatProtocolValues.SendMediaMsg);
var ext = _chatserver.Read(_client.GetStream());
var snumbytes = _chatserver.Read(_client.GetStream());
var numbytes = int.Parse(snumbytes);
if (numbytes == 0)
{
_chatserver.Write(_client.GetStream(),
"server> No media file to send");
return;
}
if (numbytes > 51200000)
{
_chatserver.Write(_client.GetStream(),
"server> Media File is larger than 5 MB");
return;
}
var b = _chatserver.ReadBinary(_client.GetStream(), numbytes);
if (b == null)
{
_chatserver.Write(_client.GetStream(),
"server> Transmission Error");
return;
}
var fext = new FileStream(Nickname + "_" + name, FileMode.Create);
var unicode = new UnicodeEncoding();
var bytes = unicode.GetBytes(ext);
fext.Write(bytes, 0, bytes.Length);
fext.Close();
var f = new FileStream(Nickname + "_" + name + "." + ext, FileMode.Create);
f.Write(b, 0, b.Length);
f.Close();
_chatserver.Write(t.GetStream(),
ChatProtocolValues.MEDIA_FROM_MSG(Nickname, name));
_chatserver.Write(_client.GetStream(),
ChatProtocolValues.MEDIA_SEND_MSG(Nickname));
}
else
{
_chatserver.Write(_client.GetStream(),
ChatProtocolValues.USER_NOT_FOUND_MSG(name));
}
}
//read and response to mesaages
public void Listen()
{
//To ensure that the form is activated
while (!form_activated)
{
Thread.Sleep(0);
}
try
{
while (true)
{
action = null;
//waiting to read
responseData = _chatstream.Read();
//if asked to pause
//while paused data may have been used by another method
while (pause_listening)
{
Thread.Sleep(0);
}
//check if data had been cleared
if (responseData == "")
{
continue;
}
if (this.WindowState == FormWindowState.Minimized)
{
FlashWindow(this.Handle.ToInt32(), true);
}
//default asction
if (responseData != "")
{
action = new ClientAction(action_message);
}
//Perform this only if checkbox is checked
if (checkbox.Checked)
{
if (responseData.IndexOf(ChatProtocolValues.PIC_FROM_MSG("", nickname)) == 0)
{
action = new ClientAction(action_auto_get_pic);
}
}
if (checkbox.Checked)
{
if (responseData.IndexOf(ChatProtocolValues.MEDIA_FROM_MSG("", nickname)) == 0)
{
action = new ClientAction(action_auto_get_media);
}
}
//Special messages from server
//signal to quit from server
if (responseData.IndexOf(ChatProtocolValues.QUIT_MSG) == 0)
{
action = new ClientAction(action_server_says_quit);
}
//Connection established
if (responseData.IndexOf(ChatProtocolValues.CONNECTION_HEADER_MSG) == 0)
{
action = new ClientAction(action_connection);
}
//signal to get picture
if (responseData == ChatProtocolValues.GET_PIC_MSG)
{
action = new ClientAction(action_server_get_pic);
}
//Signal to send picture
if (responseData == ChatProtocolValues.SEND_PIC_MSG)
{
action = new ClientAction(action_server_send_pic);
}
//signal to get media
if (responseData == ChatProtocolValues.GET_MEDIA_MSG)
{
action = new ClientAction(action_server_get_media);
}
//Signal to send media
if (responseData == ChatProtocolValues.SEND_MEDIA_MSG)
{
action = new ClientAction(action_server_send_media);
}
//perform the action
if (action != null)
{
action();
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
action = new ClientAction(action_handle_error);
action();
}
} //LISTEN
//SEND MEDIA
private void action_send_media()
{
string[] s = readdata.Split(':');
string name = "";
//format is
//:send media:<target>
if (s.Length == 3)
{
name = s[2];
}
//Locate the target
TcpClient t = null;
if (chatserver.FindUserRoom(name) != 0)
{
t = (TcpClient)chatserver.ClientConnections[name.ToUpper()];
}
//If target is found
if ((t != null))
{
//Inform the sender(client) to send the media
chatserver.Write(client.GetStream(), ChatProtocolValues.SEND_MEDIA_MSG);
string ext = chatserver.Read(client.GetStream());
//Find out the number of byte to read from sender
string snumbytes = chatserver.Read(client.GetStream());
int numbytes = int.Parse(snumbytes);
if (numbytes == 0)
{
chatserver.Write(client.GetStream(),
"server> No media file to send");
return;
}
//must be less than 5 MB
if (numbytes > 51200000)
{
chatserver.Write(client.GetStream(),
"server> Media File is larger than 5 MB");
return;
}
//read the bytes
byte[] b = chatserver.ReadBinary(client.GetStream(), numbytes);
if (b == null)
{
chatserver.Write(client.GetStream(),
"server> Transmission Error");
return;
}
//To store the data in a file
//name convention is <sender>_<target>.ext
//create a file to hold the extension
FileStream fext = new FileStream(nickname + "_" + name, FileMode.Create);
UnicodeEncoding Unicode = new UnicodeEncoding();
byte[] bytes = Unicode.GetBytes(ext);
fext.Write(bytes, 0, bytes.Length);
fext.Close();
FileStream f = new FileStream(nickname + "_" + name + "." + ext, FileMode.Create);
f.Write(b, 0, b.Length);
f.Close();
//Inform the target that there is a file from sender
chatserver.Write(t.GetStream(),
ChatProtocolValues.MEDIA_FROM_MSG(nickname, name));
//Inform the sender that server had received the media
chatserver.Write(client.GetStream(),
ChatProtocolValues.MEDIA_SEND_MSG(nickname));
}
else
{
//If target is not found inform sender
chatserver.Write(client.GetStream(),
ChatProtocolValues.USER_NOT_FOUND_MSG(name));
}
}
