Implementation of Remote Command Execution using TCP

/* Implementation of Remote Command Execution using TCP */

// RemoteServer.java : A Simple Remote Server Program

import java.io.*;

import java.net.*;

class RemoteServer

{

public static void main(String args[])

{

try

{

int Port;

BufferedReader Buf =new BufferedReader(new

InputStreamReader(System.in));

System.out.print(" Enter the Port Address : " );

Port=Integer.parseInt(Buf.readLine());

ServerSocket ss=new ServerSocket(Port);

System.out.println(" Server is Ready To Receive a Command. ");

System.out.println(" Waiting ..... ");

Socket s=ss.accept();

if(s.isConnected()==true)

            System.out.println(" Client Socket is Connected Succecfully. ");

InputStream in=s.getInputStream();

OutputStream ou=s.getOutputStream();

BufferedReader buf=new BufferedReader(new

InputStreamReader(in));

String cmd=buf.readLine();

PrintWriter pr=new PrintWriter(ou);

pr.println(cmd);

Runtime H=Runtime.getRuntime();

Process P=H.exec(cmd);

System.out.println(" The " + cmd + " Command is Executed Successfully. ");

pr.flush();

pr.close();

ou.close();

in.close();

}

catch(Exception e)

{

System.out.println(" Error : " + e.getMessage());

}

}

}

// RemoteClient.java : A Simple Remote Client Program

import java.io.*;

import java.net.*;

class RemoteClient

{

public static void main(String args[])

{

try

{

int Port;

BufferedReader Buf =new BufferedReader(new

InputStreamReader(System.in));

System.out.print(" Enter the Port Address : " );

Port=Integer.parseInt(Buf.readLine());

Socket s=new Socket("localhost",Port);

if(s.isConnected()==true)

            System.out.println(" Server Socket is Connected Succecfully. ");

InputStream in=s.getInputStream();

OutputStream ou=s.getOutputStream();

BufferedReader buf=new BufferedReader(new

InputStreamReader(System.in));

BufferedReader buf1=new BufferedReader(new

InputStreamReader(in));

PrintWriter pr=new PrintWriter(ou);

System.out.print(" Enter the Command to be Executed : " );

pr.println(buf.readLine());

pr.flush();

String str=buf1.readLine();

System.out.println(" " + str + " Opened Successfully. ");

System.out.println(" The " + str + " Command is Executed Successfully. ");

pr.close();

ou.close();

in.close();

}

catch(Exception e)

{

System.out.println(" Error : " + e.getMessage());

}

}

}

OUTPUT :

RemoteServer.java :

javac RemoteServer.java

java     RemoteServer

 Enter the Port Address : 1234

 Server is Ready To Receive a Command.

 Waiting .....

 Client Socket is Connected Succecfully.

 The calc Command is Executed Successfully.

RemoteClient.java :

javac RemoteClient.java

java     RemoteClient

 Enter the Port Address : 1234

 Server Socket is Connected Succecfully.

 Enter the Command to be Executed : calc

 calc Opened Successfully.

 The calc Command is Executed Successfully.