transfer a file between server and client

[diegoblin]

Hi, i kind of new to java and i want to transfer a file between a server and a client.
I know i have to use InputStream and OutputStream, but i don't know how to do it properly.
So far i think i've managed to do the client part. i read the content of a file, "hi.txt", and i send it to the server.

The problem is in the server part, i do not know how to write the file in the server. Thanks in advance for your help

Here is my code for the client.

import java.net.*;
import java.io.*;
public class client
{
	
	public static void main(String arg[]) throws IOException
	{
		
		InetAddress addr = InetAddress.getByName(null);//because i'm in my pc
		System.out.println("addr = " + addr);
		Socket socket = new Socket(addr, server.port);
		
		String source = "c:/hi.txt";
		byte[] buf = new byte[10];//1 kilobyte buffer
		int lentgth;
		
		
		InputStream in = new BufferedInputStream(new FileInputStream(source));
		OutputStream out = new BufferedOutputStream(socket.getOutputStream());
		
		
		try
		{
			
			
			
			
			while((lentgth = in.read(buf))>0)
				{
				
				    out.write(buf,0,lentgth);//byte flow sent to the server
				}
			
			
			
			
		}
		finally
		{
			out.flush();
			out.close();
			in.close();
			System.out.println("closing socket...");
			socket.close();
		}
	}
}

Server code

import java.net.*;
import java.io.*;
public class server
{
	public static final int port = 8080;
	public static void main(String arg[]) throws IOException
	{
		
		ServerSocket s = new ServerSocket(port);
		System.out.println("Started:  " + s);
		byte[] buffer = new byte[10];
		
		try
		{
			Socket socket = s.accept();
			System.out.println("Connection accepted: "+ socket);
			//copy file  code here
			
						

				try
				{
				InputStream in = new BufferedInputStream(socket.getInputStream());
				
				
				while(true)// loop to copy the file
				{

					
				}
				
				}
				finally
				{
					socket.close();	
					System.out.println("closing socket...");
				}	
		}
		finally
		{
			s.close();
			System.out.println("closing Server socket...");
		}
	}
}

[chaarmann]

You used a FileInputStream to read the dta from file on the client, so you can use a FileOutputStrea m to write the data as file on the server.

By the way,you have an endless "while(true )" loop in your code! Obviously you should get the data from the socket there and store it as a file.