76 lines
2 KiB
Go
76 lines
2 KiB
Go
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// Copyright 2016 The Chihaya Authors. All rights reserved.
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// Use of this source code is governed by the BSD 2-Clause license,
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// which can be found in the LICENSE file.
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package response
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import (
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"github.com/chihaya/chihaya"
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"github.com/chihaya/chihaya/pkg/event"
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"github.com/chihaya/chihaya/server/store"
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"github.com/chihaya/chihaya/tracker"
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)
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func init() {
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tracker.RegisterAnnounceMiddleware("store_swarm_interaction", announceSwarmInteraction)
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}
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// FailedSwarmInteraction represents an error that indicates that the
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// interaction of a peer with a swarm failed.
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type FailedSwarmInteraction string
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// Error satisfies the error interface for FailedSwarmInteraction.
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func (f FailedSwarmInteraction) Error() string { return string(f) }
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// announceSwarmInteraction provides a middleware that manages swarm
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// interactions for a peer based on the announce.
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func announceSwarmInteraction(next tracker.AnnounceHandler) tracker.AnnounceHandler {
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return func(cfg *chihaya.TrackerConfig, req *chihaya.AnnounceRequest, resp *chihaya.AnnounceResponse) (err error) {
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if req.IPv4 != nil {
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err = updatePeerStore(req, req.Peer4())
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if err != nil {
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return FailedSwarmInteraction(err.Error())
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}
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}
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if req.IPv6 != nil {
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err = updatePeerStore(req, req.Peer6())
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if err != nil {
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return FailedSwarmInteraction(err.Error())
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}
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}
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return next(cfg, req, resp)
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}
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}
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func updatePeerStore(req *chihaya.AnnounceRequest, peer chihaya.Peer) (err error) {
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storage := store.MustGetStore()
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switch {
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case req.Event == event.Stopped:
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err = storage.DeleteSeeder(req.InfoHash, peer)
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if err != nil && err != store.ErrResourceDoesNotExist {
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return err
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}
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err = storage.DeleteLeecher(req.InfoHash, peer)
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if err != nil && err != store.ErrResourceDoesNotExist {
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return err
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}
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case req.Event == event.Completed || req.Left == 0:
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err = storage.GraduateLeecher(req.InfoHash, peer)
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if err != nil {
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return err
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}
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default:
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err = storage.PutLeecher(req.InfoHash, peer)
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if err != nil {
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return err
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}
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}
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return nil
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}
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