Create a client/server application where the client requests for a particular file on the server. If the file exists on the server, then write the contents of the file to the client.

/*
clientServerApplicationFileRetriveServerSideProgramming.java
*/

import java.io.*;
import java.net.*;
class clientServerApplicationFileRetriveServerSideProgramming
{
	public static void main(String args[]) throws Exception
	{
		ServerSocket ss = new ServerSocket(8888);
		Socket s = ss.accept();
		System.out.println("Success!! Connection Established!!");
		BufferedReader cbf = new BufferedReader(new InputStreamReader(s.getInputStream()));
		String FileName = cbf.readLine();
		DataOutputStream dos = new DataOutputStream(s.getOutputStream());
		FileReader fr = null;
		BufferedReader filebr = null;
		File fileNew = new File(FileName);
		if(fileNew.exists())
		{
			dos.writeBytes("Find"+"\n");
			fr = new FileReader(FileName);
			filebr = new BufferedReader(fr);
			String str;
			while( (str = filebr.readLine()) != null)
			{
				dos.writeBytes(str+"\n");
			}
			filebr.close();
			dos.close();
			cbf.close();
			fr.close();
			s.close();
			ss.close();
		}
		else
		{
			dos.writeBytes("Oops!! File Not Found!!"+"\n");
		}
	}
}

/*
clientServerApplicationFileRetriveClientSideProgramming.java
*/

import java.io.*;
import java.net.*;
class clientServerApplicationFileRetriveClientSideProgramming
{
	public static void main(String args[]) throws Exception
	{
		Socket s = new Socket("localhost",8888);
		BufferedReader cbf = new BufferedReader(new InputStreamReader(System.in));
		System.out.print("Enter Filename : ");
		String FileName = cbf.readLine();
		DataOutputStream dos = new DataOutputStream(s.getOutputStream());
		dos.writeBytes(FileName+"\n");
		BufferedReader sbf = new BufferedReader(new InputStreamReader(s.getInputStream()));
		String str;
		str = sbf.readLine();
		if(str.equals("Find"))
		{
			while((str = sbf.readLine()) != null)
			{
				System.out.println(str);
			}
			cbf.close();
			dos.close();
			sbf.close();
			s.close();
		}
	}
}

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