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peertube/ARCHITECTURE.md
2017-11-27 19:43:01 +01:00

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Architecture

Vocabulary

  • Fediverse: several servers following each others
  • Instance: a server which runs PeerTube in the fediverse
  • Origin instance: the instance on which the video was uploaded and which is seeding (WebSeed protocol) the video
  • Following: the action of a PeerTube instance which will follow another instance (subscribe to its videos)

Base

Communications

  • All the communications between the instances are signed with Linked Data Signatures with the private key of the account that made the action
  • We use the ActivityPub protocol (only server-server for now). Object models could be found in shared/models/activitypub directory.
  • All the requests are retried several times if they fail
  • The maximum of points would be defined

Instance

  • An instance has a websocket tracker which is responsible for all the video uploaded in it
  • An instance has an administrator that can follow other instances
  • An instance can be configured to follow back automatically
  • An instance can blacklist other instances (only used in "follow back" mode)
  • An instance cannot choose which other instance follow it, but it can decide to reject all followers
  • After having uploaded a video, the instance seeds it (WebSeed protocol)
  • If a user wants to watch a video, he asks its instance the magnet URI and the frontend adds the torrent (with WebTorrent), creates the HTML5 video player and streams the file into it
  • A user watching a video seeds it too (BitTorrent) so another user who is watching the same video can get the data from the origin server and the user 1 (etc)