100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
// Package middleware implements the TrackerLogic interface by executing
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// a series of middleware hooks.
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package middleware
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import (
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"context"
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"time"
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log "github.com/Sirupsen/logrus"
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"github.com/chihaya/chihaya/bittorrent"
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"github.com/chihaya/chihaya/frontend"
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"github.com/chihaya/chihaya/storage"
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)
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// Config holds the configuration common across all middleware.
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type Config struct {
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AnnounceInterval time.Duration `yaml:"announce_interval"`
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}
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var _ frontend.TrackerLogic = &Logic{}
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// NewLogic creates a new instance of a TrackerLogic that executes the provided
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// middleware hooks.
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func NewLogic(cfg Config, peerStore storage.PeerStore, preHooks, postHooks []Hook) *Logic {
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l := &Logic{
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announceInterval: cfg.AnnounceInterval,
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peerStore: peerStore,
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preHooks: preHooks,
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postHooks: postHooks,
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}
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if len(l.preHooks) == 0 {
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l.preHooks = []Hook{nopHook{}}
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}
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if len(l.postHooks) == 0 {
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l.postHooks = []Hook{nopHook{}}
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}
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return l
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}
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// Logic is an implementation of the TrackerLogic that functions by
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// executing a series of middleware hooks.
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type Logic struct {
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announceInterval time.Duration
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peerStore storage.PeerStore
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preHooks []Hook
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postHooks []Hook
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}
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// HandleAnnounce generates a response for an Announce.
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func (l *Logic) HandleAnnounce(ctx context.Context, req *bittorrent.AnnounceRequest) (*bittorrent.AnnounceResponse, error) {
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resp := &bittorrent.AnnounceResponse{
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Interval: l.announceInterval,
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}
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for _, h := range l.preHooks {
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if err := h.HandleAnnounce(ctx, req, resp); err != nil {
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return nil, err
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}
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}
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return resp, nil
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}
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// AfterAnnounce does something with the results of an Announce after it has
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// been completed.
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func (l *Logic) AfterAnnounce(ctx context.Context, req *bittorrent.AnnounceRequest, resp *bittorrent.AnnounceResponse) {
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for _, h := range l.postHooks {
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if err := h.HandleAnnounce(ctx, req, resp); err != nil {
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log.Errorln("chihaya: post-announce hooks failed:", err.Error())
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return
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}
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}
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}
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// HandleScrape generates a response for a Scrape.
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func (l *Logic) HandleScrape(ctx context.Context, req *bittorrent.ScrapeRequest) (*bittorrent.ScrapeResponse, error) {
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resp := &bittorrent.ScrapeResponse{
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Files: make(map[bittorrent.InfoHash]bittorrent.Scrape),
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}
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for _, h := range l.preHooks {
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if err := h.HandleScrape(ctx, req, resp); err != nil {
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return nil, err
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}
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}
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return resp, nil
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}
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// AfterScrape does something with the results of a Scrape after it has been
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// completed.
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func (l *Logic) AfterScrape(ctx context.Context, req *bittorrent.ScrapeRequest, resp *bittorrent.ScrapeResponse) {
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for _, h := range l.postHooks {
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if err := h.HandleScrape(ctx, req, resp); err != nil {
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log.Errorln("chihaya: post-scrape hooks failed:", err.Error())
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return
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}
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}
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}
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