Torrent library allowing downloading separate file pieces

Question

I am searching for the way to download concrete pieces of file (e.q. first or last 1Mb) via bittorrent programmically. C / C++, Java or Ruby libraries would be good solutions for me. Is there any solution in opensource world?

Answer 1

Azureus is written in Java, and is provided on SourceForge

http://azureus.sourceforge.net/download.php

Answer 2

Have a look at the rtorrent client and library. It offers this functionality and much more.