🚀 go-pugleaf

Hi Folks:
I am trying to read an HTML request from a browser and pipe it to a Web
Server, then do the same with the server's response back to the browser.  I
have a stream copier method to fast copy input to output streams and vice
versa:

public static void copy(InputStream in, OutputStream out) throws
IOException{
    synchronized( in ) {
      synchronized( out ) {
        BufferedInputStream bin= new BufferedInputStream( in );
        BufferedOutputStream bout= new BufferedOutputStream( out );

        while(true) {

          int datum = bin.read();
          System.out.println( "bytesRead : " +datum );
          if (datum == -1) break;
          bout.write(datum);

        }
        bout.flush();
        System.out.println( " flushing: "  );
      }
    }
}

Based on API description for InputStream, read() returns the number of bytes
actually read, or -1 on the end of the stream.  However, in the above method
the datum read never gets -1, so it never breaks the while.
Could anyone explain me what the problem is.  Is it there any alternative to
this approach?
Thanks.
Francisco