private ByteBuffer peekNextChunk() throws IOException {
if (nextChunk == null) {
ByteBuffer buffer = ByteBuffer.allocate(chunkSize);
long length = body.read(buffer);
if (length < 0) {
// Negative means this is finished
buffer.flip();
nextChunk = buffer;
endOfInput = true;
} else if (length == 0) {
// Zero means we didn't get anything this time, but may get next time
buffer.flip();
nextChunk = null;
} else {
buffer.flip();
nextChunk = buffer;
}
}
return nextChunk;
}
public void close() throws Exception {
body.close();
}