Sending a file over Socket

[winston2020]

Hello, I'm having a really hard time sending a file via a socket. I always end up with just a few bytes short, or a few bytes too many.

Here is the server code:

DataOutputStream out = new DataOutputStream(con.getOutputStream());

		File file = new File("N:\\jdk-6u5-windows-i586-p.exe");
		BufferedInputStream in = new BufferedInputStream(new FileInputStream(new File("N:\\jdk-6u5-windows-i586-p.exe")));
		out.writeLong(in.available());

		byte[] buff = new byte[con.getSendBufferSize()];			
		while(in.available() > 0){	

			if(in.available() < buff.length){
				System.out.println("There are: " + in.available() + " bytes to read.");
				System.out.println("Buffere Size is: " + buff.length);

			}
			out.write(buff);
			in.read(buff);

			if(in.available() == 0){
				try{
					System.out.println("Sleeping...");
					Thread.sleep(100);
					System.out.println("Now: " + in.available());
				}catch(Exception e){
					System.out.println(e.getMessage());
				}
			}				
		}
		System.out.println("Server: There are " + in.available() + "bytes available.");

		out.flush();
		out.close();
		in.close();
		con.close();

And here's the client:

Socket client = new Socket("localhost", 9370);
            DataInputStream sizeIn = new DataInputStream(client.getInputStream());
            BufferedInputStream in = new BufferedInputStream(client.getInputStream());
            long fileSize = sizeIn.readLong();
            long totalBytes = 0;
            int progress = 0;
            int oldProgress = 0;
            System.out.println("FileSize: " + fileSize);
            
            BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File("N:\\clientOutput.exe")));
            byte[] buff = new byte[client.getReceiveBufferSize()];
            
            //Increment Total Bytes Received
            totalBytes += buff.length; 
            
            while(in.available() > 0){                     
                
                in.read(buff);
                out.write(buff);
                totalBytes += buff.length;                
                
                
                
                if(in.available() < buff.length){
                    try{
                        Thread.sleep(10);
                    }catch(Exception e){
                        System.out.println(e.getMessage());
                    }
                    
                    //Handle Last Few Bytes
                    if(in.available() < buff.length && in.available() != 0){
                        System.out.println("Looping Through Buffer Length");
                        
                        for(int i = 0; i <= in.available(); i++){                        
                            out.write(in.read());
                        }
                    }
                }
                                
                progress = (int)(((float)totalBytes / (float)fileSize) * (float)100);
                if(progress != oldProgress){
                                        
                    System.out.println(progress + "%");
                    oldProgress = progress;
                }
            }
            
            out.flush();
            out.close();

Any Ideas what I'm doing wrong?