Using TCP/IP sockets, write a client – server program to make the client send the file name and to make the server send back the contents of the requested file if present.

Client

import java.io.*;

import java.net.*;

import java.util.*;

public class Client

{

public static void main(String args[])

{

Socket socket=null;

try

{

socket=new Socket(InetAddress.getLocalHost().getHostName(),9912);

BufferedReader reader=new BufferedReader(new InputStreamReader(socket.getInputStream()));

PrintWriter writer=new PrintWriter(socket.getOutputStream(),true);

System.out.println("Enter the file name");

Scanner s=new Scanner(System.in);

String file=s.nextLine();

writer.println(file);

System.out.println("Reading Client......");

String h=null;

while((h=reader.readLine()) !=null)

System.out.println(h);

}

catch(IOException e)

{

e.printStackTrace();

}

finally

{

try

{

socket.close();

}

catch(IOException e)

{

e.printStackTrace();

}

}

}

}

Server

import java.io.*;

import java.net.*;

public class Server

{

public static class ClientHandler extends Thread

{

private Socket socket;

ClientHandler(Socket socket)

{

System.out.println("client connected\n");

this.socket=socket;

}

public void run()

{

try{

BufferedReader reader=new BufferedReader(new InputStreamReader(socket.getInputStream()));

PrintWriter writer=new PrintWriter(socket.getOutputStream(),true);

String file=reader.readLine().trim();

System.out.println("requested file is"+file+"\n");

FileReader fp2=new FileReader(file);

BufferedReader rr=new BufferedReader(fp2);

String k=null;

while((k=rr.readLine())!=null)

{

writer.println(k);

}

writer.close();

rr.close();

}

catch(IOException e)

{

e.printStackTrace();

}

finally

{

try

{

socket.close();

}

catch(IOException e)

{

e.printStackTrace();

}

}

}

}

public static void main(String args[])

{

final int port=9912;

try

{

ServerSocket ss=new ServerSocket(port);

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

while(true)

{

Socket socket=ss.accept();

new ClientHandler(socket).start();

}

}

catch(IOException e)

{

e.printStackTrace();

}

}

}