Magnet link

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1 Definition
2 How To
- 2.1 Open manually
- 2.2 Open automatically
3 Restrictions

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Definition

Azureus supports magnet links like magnet:?xt=urn:btih:IJBDPDSBT4QZLBIJ6NX7LITSZHZQ7F5I for downloads, which means you don't even need the .torrent file to start a download, instead Azureus will fetch the torrent from other peers on the Distributed Database.
The magnet link consists of the prefix magnet:?xt=urn:btih: and the base32() encoded SHA1 of the torrent's info dictionary (known as torrent-hash or infohash). Please note that's the base32-encoding of the torrent-hash's binary (20byte) representation, not the hexadecimal representation.
Since version 4.3.0.1_B04 Vuze supports also the newer 40-byte HEX-encoding style of the hash in the magnet link.

The official documentation of magnet-URIs can be found here: http://magnet-uri.sourceforge.net/

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How To

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Open manually

You can open them via File -> Open -> Location (Ctrl+L) or as a commandline parameter appended to the Azureus launcher or Java call.

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Open automatically

Windows users can link Azureus to magnet URIs with the magnet-URI handler. Azureus 2.3.0.6 and later will do that automatically. If another program has 'taken over' the magnet protocol, "Tools > Options > Reset explorer file associations (.torrent)" {at the bottom} will make Azureus the default again.

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