Transfer file with Socket class

[Pojahn_M]

I am trying to transfer a file from one PC to an other PC with java.net.Socket class. I get exception after exactly 1024 bytes have been transferred.
I did use the code from this tutorial:
Transfer a file via Socket : Socket*«*Network Protocol*«*Java

And the exception:

java.net.SocketException: Connection reset by peer: socket write error
	at java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.net.SocketOutputStream.socketWrite(Unknown Source)
	at java.net.SocketOutputStream.write(Unknown Source)
	at lab.testing.Server.main(Server.java:27)

Note that it is the server class that causes the exception. Line 27 look like this:
os.write(mybytearray, 0, mybytearray.length); (see the rest of the code on the page I linked above).

Why is this happening?

[Norm]

What is the code on the other side of the connection doing?
Did it close the connection?

[Pojahn_M]

yeah, I have modified it a bit so it always close the conncetion. however I do not think that code is working, but I found this:
Transfer a file via Socket - Real's Java How-to
I got some problems in this code. This time however, I do not get exception. I just get nothing. It does not transfer any byte at all.
After some minor modifications:

import java.io.BufferedInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

	public static void main(String[] args) throws IOException
	{
		ServerSocket servsock = new ServerSocket(1202);
		File myFile = new File("C:\\test.obj");
		while (true)
		{
			Socket sock = null;
			try
			{
				sock = servsock.accept();
				
				//Send the file size
				int fileSize = (int) myFile.length ();
				DataOutputStream out = new DataOutputStream (sock.getOutputStream());
				out.writeInt (fileSize);
				
				//Send the file
				byte[] mybytearray = new byte[fileSize];
				BufferedInputStream bis = new BufferedInputStream(new FileInputStream(myFile));
				bis.read(mybytearray, 0, mybytearray.length);
				OutputStream os = sock.getOutputStream();
				os.write(mybytearray, 0, mybytearray.length);
				os.flush();
			}
			catch (Exception e)
			{
				e.printStackTrace();
			}
			finally
			{
				try
				{
					sock.close();
					break;
				}
				catch (Exception e)
				{}
			}

		}
	}
}

import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;

public class Client
{
	public static void main(String[] argv) throws Exception
	{
		Socket sock = null;
		BufferedOutputStream out = null;
		
		try
		{
			sock = new Socket("127.0.0.1",1202);
			InputStream is = sock.getInputStream();
			
			File file = new File ("testNew.obj");
			FileOutputStream fos = new FileOutputStream(file);
			out = new BufferedOutputStream(fos);		
	
			//Get the file size
			DataInputStream in = new DataInputStream  (sock.getInputStream());
			int fileSize = in.readInt ();
	
			//Get the file
			int bytesRead;
			int current = 0;
			byte [] mybytearray  = new byte [fileSize];
			bytesRead = is.read(mybytearray,0,mybytearray.length);
			current = bytesRead;
	
		    do 
		    {
		    	bytesRead = is.read(mybytearray, current, (mybytearray.length-current));
	
		    	if(bytesRead >= 0)
		    		current += bytesRead;
		       
		    } while(bytesRead > -1);
	
		    out.write(mybytearray, 0 , current);
		    out.flush();
		}
		catch (IOException e)
		{}
		finally
		{
			try
			{
				if (out != null)
					out.close();
			}
			catch (Exception e)
			{}
			
			try
			{
				if (sock != null)
					sock.close();
			}
			catch (Exception e)
			{}
		}
	  }
  }

[Norm]

Your empty catch blocks are a worry. Put a call to printStackTrace in them.

Add some println statements to show what is happening. Print out variable values as the code executes.

[Pojahn_M]

hmm. I changed the file object in the Client to "E:\\testNew.obj". Now i get heap space error at line 33 on the client file. wtf?
oh and the test file was a byte in size.

[Pojahn_M]

Never mind. I created my own method my way and it works flawless.

[Norm]

Glad you figured it out.