// in.available() always returns 0 (the default).
        int skip = (int) Math.min(remaining, BUFFER_SIZE);
        if (buf == null) {
          // Allocate a buffer bounded by the maximum size that can be requested, for
          // example an array of BUFFER_SIZE is unnecessary when the value of remaining
          // is smaller.
          buf = new byte[skip];
        }
        if ((skipped = in.read(buf, 0, skip)) == -1) {