Golang Message.GetProviderPeers方法代碼示例

func (dht *IpfsDHT) handleAddProvider(ctx context.Context, p peer.ID, pmes *pb.Message) (*pb.Message, error) {
	lm := make(lgbl.DeferredMap)
	lm["peer"] = func() interface{} { return p.Pretty() }

	defer log.EventBegin(ctx, "handleAddProvider", lm).Done()
	key := key.Key(pmes.GetKey())
	lm["key"] = func() interface{} { return key.Pretty() }

	log.Debugf("%s adding %s as a provider for '%s'\n", dht.self, p, key)

	// add provider should use the address given in the message
	pinfos := pb.PBPeersToPeerInfos(pmes.GetProviderPeers())
	for _, pi := range pinfos {
		if pi.ID != p {
			// we should ignore this provider reccord! not from originator.
			// (we chould sign them and check signature later...)
			log.Debugf("handleAddProvider received provider %s from %s. Ignore.", pi.ID, p)
			continue
		}

		if len(pi.Addrs) < 1 {
			log.Debugf("%s got no valid addresses for provider %s. Ignore.", dht.self, p)
			continue
		}

		log.Infof("received provider %s for %s (addrs: %s)", p, key, pi.Addrs)
		if pi.ID != dht.self { // dont add own addrs.
			// add the received addresses to our peerstore.
			dht.peerstore.AddAddrs(pi.ID, pi.Addrs, peer.ProviderAddrTTL)
		}
		dht.providers.AddProvider(ctx, key, p)
	}

	return nil, nil
}

func getRoutingProviders(ds datastore.Datastore, k key.Key) ([]*dhtpb.Message_Peer, error) {
	e := log.EventBegin(context.Background(), "getProviders", &k)
	defer e.Done()
	var providers []*dhtpb.Message_Peer
	if v, err := ds.Get(providerKey(k)); err == nil {
		if data, ok := v.([]byte); ok {
			var msg dhtpb.Message
			if err := proto.Unmarshal(data, &msg); err != nil {
				return nil, err
			}
			providers = append(providers, msg.GetProviderPeers()...)
		}
	}
	return providers, nil
}

func (s *Server) handleMessage(
	ctx context.Context, p peer.ID, req *dhtpb.Message) (peer.ID, *dhtpb.Message) {

	defer log.EventBegin(ctx, "routingMessageReceived", req, p).Done()

	var response = dhtpb.NewMessage(req.GetType(), req.GetKey(), req.GetClusterLevel())
	switch req.GetType() {

	case dhtpb.Message_GET_VALUE:
		rawRecord, err := getRoutingRecord(s.routingBackend, key.Key(req.GetKey()))
		if err != nil {
			return "", nil
		}
		response.Record = rawRecord
		return p, response

	case dhtpb.Message_PUT_VALUE:
		// FIXME: verify complains that the peer's ID is not present in the
		// peerstore. Mocknet problem?
		// if err := verify(s.peerstore, req.GetRecord()); err != nil {
		// 	log.Event(ctx, "validationFailed", req, p)
		// 	return "", nil
		// }
		putRoutingRecord(s.routingBackend, key.Key(req.GetKey()), req.GetRecord())
		return p, req

	case dhtpb.Message_FIND_NODE:
		p := s.peerstore.PeerInfo(peer.ID(req.GetKey()))
		pri := []dhtpb.PeerRoutingInfo{
			{
				PeerInfo: p,
				// Connectedness: TODO
			},
		}
		response.CloserPeers = dhtpb.PeerRoutingInfosToPBPeers(pri)
		return p.ID, response

	case dhtpb.Message_ADD_PROVIDER:
		for _, provider := range req.GetProviderPeers() {
			providerID := peer.ID(provider.GetId())
			if providerID == p {
				store := []*dhtpb.Message_Peer{provider}
				storeProvidersToPeerstore(s.peerstore, p, store)
				if err := putRoutingProviders(s.routingBackend, key.Key(req.GetKey()), store); err != nil {
					return "", nil
				}
			} else {
				log.Event(ctx, "addProviderBadRequest", p, req)
			}
		}
		return "", nil

	case dhtpb.Message_GET_PROVIDERS:
		providers, err := getRoutingProviders(s.routingBackend, key.Key(req.GetKey()))
		if err != nil {
			return "", nil
		}
		response.ProviderPeers = providers
		return p, response

	case dhtpb.Message_PING:
		return p, req
	default:
	}
	return "", nil
}