Bencoding Algorithm - Torrent

Bencoding

→ Torrent file are ‘Bencoded’ and to extract the above fields we would need to parse the torrent file (Bencoded).

→ When you download the torrent file and give it to your client in order to download the content of the file. Client will first understand and extract the content described above. then it will get to know the location and where to get the actual piece of data.

Bencoding Specification

Bencoding	Supports : Strings, list, integers, and dictionaries
Strings	Format : <length> : <string> Example : om → 2 : om
Integers	Format : i<integer>e, Example : 10 → i10e
list	Format : l<bencoded values>e, Example : [”a”, “be”, 1] → l 1:a 2:be i1e e
Dictionary	Format : d<bencoded string> <bencoded values>….e, Example : { “a”: 1, “be”: 2} → d 1:a i1e 2:be i2e e (key value…)