package sd;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class EchoServer {

    private int serverPort;	
    
    public EchoServer(int p) {
	serverPort= p;		
    }
    
    
    public static void main(String[] args) throws IOException{
	System.err.println("SERVER...");
	if (args.length<1) {
	    System.err.println("Missing parameter: port number");	
	    System.exit(1);
	}
	int p=0;
	try {
	    p= Integer.parseInt( args[0] );
            
	}
	catch (Exception e) {
	    e.printStackTrace();
	    System.exit(2);
	}
	
	
	EchoServer serv= new EchoServer(p);
	serv.servico();   // activa o servico
    }

    
    // activa o servidor no porto indicado em "serverPort"
    public void servico() throws IOException {
	try{
            ServerSocket s = new ServerSocket(serverPort);
            while(true){
                Socket client = s.accept();
                InputStream socketIn= client.getInputStream();
                byte[] b = new byte[256];
                int lidos = socketIn.read(b);
                String msg = new String (b,0,lidos);
                System.out.println("CLIENTE: "+msg);
                OutputStream socketOut= client.getOutputStream();
                String res = "Hey_["+msg+"]_Bye!!";
                socketOut.write(res.getBytes());
                client.close();
                
            }
         
        }
        catch(Exception e){
            e.printStackTrace();
        }
        finally{
            if(s != null){
                try{
                    s.close();
                }
                catch(Exception e2){
                    e2.printStackTrace();
                }
            }
        }


    }


}