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9862a57b73
There are no consumers of any of this logic nor is it complete. We're better off without it in the meantime until we have a use case and a more cohesive model for expressing it.
86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
// Copyright 2015 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 tracker provides a generic interface for manipulating a
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// BitTorrent tracker's fast-moving data.
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package tracker
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import (
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"time"
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"github.com/golang/glog"
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"github.com/chihaya/chihaya/config"
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"github.com/chihaya/chihaya/tracker/models"
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)
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// Tracker represents the logic necessary to service BitTorrent announces,
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// independently of the underlying data transports used.
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type Tracker struct {
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Config *config.Config
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*Storage
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}
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// New creates a new Tracker, and opens any necessary connections.
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// Maintenance routines are automatically spawned in the background.
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func New(cfg *config.Config) (*Tracker, error) {
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tkr := &Tracker{
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Config: cfg,
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Storage: NewStorage(cfg),
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}
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go tkr.purgeInactivePeers(
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cfg.PurgeInactiveTorrents,
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time.Duration(float64(cfg.MinAnnounce.Duration)*cfg.ReapRatio),
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cfg.ReapInterval.Duration,
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)
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if cfg.ClientWhitelistEnabled {
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tkr.LoadApprovedClients(cfg.ClientWhitelist)
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}
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return tkr, nil
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}
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// Close gracefully shutdowns a Tracker by closing any database connections.
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func (tkr *Tracker) Close() error {
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// TODO(jzelinskie): shutdown purgeInactivePeers goroutine.
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return nil
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}
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// LoadApprovedClients loads a list of client IDs into the tracker's storage.
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func (tkr *Tracker) LoadApprovedClients(clients []string) {
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for _, client := range clients {
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tkr.PutClient(client)
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}
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}
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// Writer serializes a tracker's responses, and is implemented for each
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// response transport used by the tracker. Only one of these may be called
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// per request, and only once.
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//
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// Note, data passed into any of these functions will not contain sensitive
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// information, so it may be passed back the client freely.
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type Writer interface {
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WriteError(err error) error
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WriteAnnounce(*models.AnnounceResponse) error
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WriteScrape(*models.ScrapeResponse) error
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}
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// purgeInactivePeers periodically walks the torrent database and removes
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// peers that haven't announced recently.
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func (tkr *Tracker) purgeInactivePeers(purgeEmptyTorrents bool, threshold, interval time.Duration) {
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for _ = range time.NewTicker(interval).C {
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before := time.Now().Add(-threshold)
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glog.V(0).Infof("Purging peers with no announces since %s", before)
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err := tkr.PurgeInactivePeers(purgeEmptyTorrents, before)
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if err != nil {
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glog.Errorf("Error purging torrents: %s", err)
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}
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}
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}
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