Golang Host.Peerstore方法代碼示例

// NewDHT creates a new DHT object with the given peer as the 'local' host
func NewDHT(ctx context.Context, h host.Host, dstore ds.ThreadSafeDatastore) *IpfsDHT {
	dht := new(IpfsDHT)
	dht.datastore = dstore
	dht.self = h.ID()
	dht.peerstore = h.Peerstore()
	dht.host = h

	// register for network notifs.
	dht.host.Network().Notify((*netNotifiee)(dht))

	dht.proc = goprocess.WithTeardown(func() error {
		// remove ourselves from network notifs.
		dht.host.Network().StopNotify((*netNotifiee)(dht))
		return nil
	})

	dht.ctx = ctx

	h.SetStreamHandler(ProtocolDHT, dht.handleNewStream)
	dht.providers = NewProviderManager(dht.ctx, dht.self)
	dht.proc.AddChild(dht.providers.proc)
	goprocessctx.CloseAfterContext(dht.proc, ctx)

	dht.routingTable = kb.NewRoutingTable(20, kb.ConvertPeerID(dht.self), time.Minute, dht.peerstore)
	dht.birth = time.Now()

	dht.Validator = make(record.Validator)
	dht.Validator["pk"] = record.PublicKeyValidator

	return dht
}

func testHasProtocolVersions(t *testing.T, h host.Host, p peer.ID) {
	v, err := h.Peerstore().Get(p, "ProtocolVersion")
	if v == nil {
		t.Error("no protocol version")
		return
	}
	if v.(string) != identify.IpfsVersion {
		t.Error("protocol mismatch", err)
	}
	v, err = h.Peerstore().Get(p, "AgentVersion")
	if v.(string) != identify.ClientVersion {
		t.Error("agent version mismatch", err)
	}
}

func bootstrapConnect(ctx context.Context, ph host.Host, peers []peer.PeerInfo) error {
	if len(peers) < 1 {
		return ErrNotEnoughBootstrapPeers
	}

	errs := make(chan error, len(peers))
	var wg sync.WaitGroup
	for _, p := range peers {

		// performed asynchronously because when performed synchronously, if
		// one `Connect` call hangs, subsequent calls are more likely to
		// fail/abort due to an expiring context.
		// Also, performed asynchronously for dial speed.

		wg.Add(1)
		go func(p peer.PeerInfo) {
			defer wg.Done()
			defer log.EventBegin(ctx, "bootstrapDial", ph.ID(), p.ID).Done()
			log.Debugf("%s bootstrapping to %s", ph.ID(), p.ID)

			ph.Peerstore().AddAddrs(p.ID, p.Addrs, peer.PermanentAddrTTL)
			if err := ph.Connect(ctx, p); err != nil {
				log.Event(ctx, "bootstrapDialFailed", p.ID)
				log.Debugf("failed to bootstrap with %v: %s", p.ID, err)
				errs <- err
				return
			}
			log.Event(ctx, "bootstrapDialSuccess", p.ID)
			log.Infof("bootstrapped with %v", p.ID)
		}(p)
	}
	wg.Wait()

	// our failure condition is when no connection attempt succeeded.
	// So drain the errs channel, counting the results.
	close(errs)
	count := 0
	var err error
	for err = range errs {
		if err != nil {
			count++
		}
	}
	if count == len(peers) {
		return fmt.Errorf("failed to bootstrap. %s", err)
	}
	return nil
}

func testKnowsAddrs(t *testing.T, h host.Host, p peer.ID, expected []ma.Multiaddr) {
	actual := h.Peerstore().Addrs(p)

	if len(actual) != len(expected) {
		t.Error("dont have the same addresses")
	}

	have := map[string]struct{}{}
	for _, addr := range actual {
		have[addr.String()] = struct{}{}
	}
	for _, addr := range expected {
		if _, found := have[addr.String()]; !found {
			t.Errorf("%s did not have addr for %s: %s", h.ID(), p, addr)
			// panic("ahhhhhhh")
		}
	}
}