CN 9 - CLIENT & SERVER PROGRAM USING TCP

9. 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.

Server,java - PROGRAM

import java.io.*;
import java.net.*;
import java.util.Scanner;

public class Server 
{
public static void main(String[] args) throws Exception 
{
System.out.println("Server ready for communication");
ServerSocket serverSocket=new ServerSocket(4000);
Socket socket=serverSocket.accept();

InputStream iStream=socket.getInputStream();
Scanner sin=new Scanner(iStream);
String fname=sin.next();

OutputStream oStream=socket.getOutputStream();
PrintWriter pWriter=new PrintWriter(oStream,true);
File file=new File(fname);
Scanner fin=new Scanner(file);
while(fin.hasNext())
pWriter.println(fin.next());
System.out.println("Connection is successful and file contents are displayed in the client window");
}

}

Client.java - PROGRAM

import java.io.*;
import java.net.*;
import java.util.Scanner;

public class Client 
{
public static void main(String[] args) throws Exception 
{
Scanner s=new Scanner(System.in);
System.out.println("Enter file name:");
String fname=s.next();
Socket socket=new Socket("127.0.0.1",4000);

OutputStream osStream=socket.getOutputStream();
PrintWriter pwWriter=new PrintWriter(osStream,true);
pwWriter.println(fname);

InputStream inStream=socket.getInputStream();
Scanner sin=new Scanner(inStream);
while(sin.hasNext())
System.out.println(sin.next());
}

}

OUTPUT :

( click on image to zoom )