4thrun/byo-bittorrent-go

Build my own X.

Build My Own BitTorrent Client in Go

Reference

• Building a BitTorrent client from the ground up in Go
• BitTorrentSpecification
• veggiedefender/torrent-client: Tiny BitTorrent client written in Go

Format

.torrent Example

d
  8:announce
    41:http://bttracker.debian.org:6969/announce
  7:comment
    35:"Debian CD from cdimage.debian.org"
  13:creation date
    i1573903810e
  4:info
    d
      6:length
        i351272960e
      4:name
        31:debian-10.2.0-amd64-netinst.iso
      12:piece length
        i262144e
      6:pieces
        26800:�������PS�^�� (binary blob of the hashes of each piece)
    e
e

Tracker Response Example

d
  8:interval
    i900e
  5:peers
    252:(another long binary blob)
e

Peer Handshake Example

\x13BitTorrent protocol\x00\x00\x00\x00\x00\x00\x00\x00\x86\xd4\xc8\x00\x24\xa4\x69\xbe\x4c\x50\xbc\x5a\x10\x2c\xf7\x17\x80\x31\x00\x74-TR2940-k8hj0wgej6ch