Pfthb

So, I'm working on a chat with file transfer funcionality. It's kind of close to be done but I'm struggling to make the transfer like I need to.
I need to achieve the following:

if file "A" is located ONLY in client "2", then client "2" should send 100% of the file to client "1"

if file "A" is located in client "2" and client "3" also has file "A", then client "2" should send 50% of the file to client "1" and client "3" should send the other 50%.

(if the file is located in 4 clients i should be 25% each....and so it goes...)

So, I managed to make the one-to-one (100%) transfer, but now I can't make the shared many-to-one transfer.
I was trying to adapt these methods I found on the internet (I've already made a few modifications to the methods) so I could use tha variable "pos" to control how many chunks would a client send, and then I would create a dinamic int variable to keep the quantity of clients I had to share the file with and use it to control the transfer.

private static void writeFile(File file, OutputStream outStream, long fileSize) 
 FileInputStream reader = null;
 try 
 reader = new FileInputStream(file);
 byte buffer = new byte[CHUNK_SIZE];
 int pos = 0;
 int bytesRead;
 while ((bytesRead = reader.read(buffer, 0, CHUNK_SIZE)) >= 0) 
 outStream.write(buffer, 0, bytesRead);
 outStream.flush();
 pos += bytesRead;
 System.out.println(pos + " bytes (" + bytesRead + " bytes read)");

 
 catch (IndexOutOfBoundsException e) 
 System.err.println("Error while reading file");
 e.printStackTrace();
 catch (IOException e) 
 System.err.println("Error while writing " + file.toString() + " to output stream");
 e.printStackTrace();
 finally 
 if (reader != null) 
 try 
 reader.close();
 catch (IOException e) 
 e.printStackTrace();
 
 
 
 


private static void saveFile(File file, InputStream inStream, long fileSize) 
 FileOutputStream fileOut = null;
 try 
 fileOut = new FileOutputStream(file);
 byte buffer = new byte[CHUNK_SIZE];
 int bytesRead;
 int pos = 0;
 while ((bytesRead = inStream.read(buffer, 0, CHUNK_SIZE)) >= 0) 

 pos += bytesRead;
 System.out.println(pos + " bytes (" + bytesRead + " bytes read)");
 fileOut.write(buffer, 0, bytesRead);

 if (pos == fileSize) 
 break;
 
 
 catch (IOException e) 
 e.printStackTrace();
 finally 
 if (fileOut != null) 
 try 
 fileOut.close();
 catch (IOException e) 
 e.printStackTrace();
 
 
 
 System.out.println("Finished, filesize = " + file.length());

But that idea seems to only work for the first transfer. I changed the "while" loop in saveFile like this, so it would only save 50% of the file from the first client, and as expected I got half of the .png i was using to test.

while ((bytesRead = inStream.read(buffer, 0, CHUNK_SIZE)) >= 0) 
 pos += bytesRead;
 System.out.println(pos + " bytes (" + bytesRead + " bytes read)");
 fileOut.write(buffer, 0, bytesRead);

 if (pos >= fileSize/2) 
 break;
 
 

But I know I can't complete the .png! The second client can't send the the chuks where "(pos >= sizeFile/2)" and I get the following error when I try to do so:

java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at tor.Client.run(Client.java:109)

Line 109 is:

Socket requester = new Socket("192.168.3.114", 2007);

Can anyone bring some light to me over this problem?