private static void ReceiveCallBack(IAsyncResult AR)
{
string action;
Socket socket = (Socket)AR.AsyncState;
int received = socket.EndReceive(AR);
byte[] databuf = new byte[received];
Array.Copy(_buffer, databuf, received);
// receiving text from client
string request = Encoding.ASCII.GetString(databuf);
// desencriptar peticion encriptada enviada por el cliente
request = Encrypt.desencriptar(request);
string response = string.Empty;
// si esta autenticado, puedo hacer request
if (is_authenticated == true)
{
// request format action,query
action = request.Split('[')[0];
request = request.Split('[')[1];
if (action == "query")
{
List <string> lista = new List <string>();
// enviar data a cliente
if (request.ToLower() != "")
{
//response = DateTime.Now.ToLongTimeString();
// make request and return
Console.WriteLine("Petition : " + request);
response = Utilities.executeQueryReturnString(request);
}
else
{
response = "Invalid Request";
}
}
if (action == "signup")
{
Utilities.writeSingleLineToFile(Utilities.user_dir, request);
response = "exito";
}
}
else
{
// si no está autenticado, autenticalo
List <string> users = new List <string>();
users = Utilities.readFileByList(Utilities.user_dir);
if (users.Contains(request))
{
Console.WriteLine("Client with Code " + request + " Logged in Succesfully");
is_authenticated = true;
response = "authenticated";
}
else
{
Console.WriteLine("Client login Failed");
response = "password error";
}
}
// encriptar respuesta para enviar de enviarsela al cliente encriptada
response = Encrypt.encriptar(response);
byte[] data = Encoding.ASCII.GetBytes(response);
socket.BeginSend(data, 0, data.Length, SocketFlags.None, new AsyncCallback(SendCallBack), socket);
// receive again after send
socket.BeginReceive(_buffer, 0, _buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveCallBack), socket);
}