mirror of
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115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
package offline
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import (
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"context"
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"errors"
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"time"
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dshelp "github.com/ipfs/go-ipfs/thirdparty/ds-help"
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routing "gx/ipfs/QmPCGUjMRuBcPybZFpjhzpifwPP9wPRoiy5geTQKU4vqWA/go-libp2p-routing"
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record "gx/ipfs/QmWGtsyPYEoiqTtWLpeUA2jpW4YSZgarKDD2zivYAFz7sR/go-libp2p-record"
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pb "gx/ipfs/QmWGtsyPYEoiqTtWLpeUA2jpW4YSZgarKDD2zivYAFz7sR/go-libp2p-record/pb"
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"gx/ipfs/QmWNY7dV54ZDYmTA1ykVdwNCqC11mpU4zSUp6XDpLTH9eG/go-libp2p-peer"
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pstore "gx/ipfs/QmYijbtjCxFEjSXaudaQAUz3LN5VKLssm8WCUsRoqzXmQR/go-libp2p-peerstore"
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proto "gx/ipfs/QmZ4Qi3GaRbjcx28Sme5eMH7RQjGkt8wHxt2a65oLaeFEV/gogo-protobuf/proto"
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ci "gx/ipfs/QmaPbCnUMBohSGo3KnxEa2bHqyJVVeEEcwtqJAYxerieBo/go-libp2p-crypto"
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ds "gx/ipfs/QmdHG8MAuARdGHxx4rPQASLcvhz24fzjSQq7AJRAQEorq5/go-datastore"
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cid "gx/ipfs/QmeSrf6pzut73u6zLQkRFQ3ygt3k6XFT2kjdYP8Tnkwwyg/go-cid"
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)
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var ErrOffline = errors.New("routing system in offline mode")
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func NewOfflineRouter(dstore ds.Datastore, privkey ci.PrivKey) routing.IpfsRouting {
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return &offlineRouting{
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datastore: dstore,
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sk: privkey,
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}
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}
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// offlineRouting implements the IpfsRouting interface,
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// but only provides the capability to Put and Get signed dht
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// records to and from the local datastore.
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type offlineRouting struct {
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datastore ds.Datastore
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sk ci.PrivKey
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}
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func (c *offlineRouting) PutValue(ctx context.Context, key string, val []byte) error {
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rec, err := record.MakePutRecord(c.sk, key, val, false)
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if err != nil {
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return err
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}
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data, err := proto.Marshal(rec)
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if err != nil {
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return err
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}
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return c.datastore.Put(dshelp.NewKeyFromBinary([]byte(key)), data)
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}
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func (c *offlineRouting) GetValue(ctx context.Context, key string) ([]byte, error) {
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v, err := c.datastore.Get(dshelp.NewKeyFromBinary([]byte(key)))
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if err != nil {
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return nil, err
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}
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byt, ok := v.([]byte)
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if !ok {
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return nil, errors.New("value stored in datastore not []byte")
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}
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rec := new(pb.Record)
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err = proto.Unmarshal(byt, rec)
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if err != nil {
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return nil, err
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}
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return rec.GetValue(), nil
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}
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func (c *offlineRouting) GetValues(ctx context.Context, key string, _ int) ([]routing.RecvdVal, error) {
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v, err := c.datastore.Get(dshelp.NewKeyFromBinary([]byte(key)))
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if err != nil {
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return nil, err
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}
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byt, ok := v.([]byte)
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if !ok {
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return nil, errors.New("value stored in datastore not []byte")
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}
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rec := new(pb.Record)
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err = proto.Unmarshal(byt, rec)
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if err != nil {
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return nil, err
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}
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return []routing.RecvdVal{
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{Val: rec.GetValue()},
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}, nil
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}
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func (c *offlineRouting) FindPeer(ctx context.Context, pid peer.ID) (pstore.PeerInfo, error) {
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return pstore.PeerInfo{}, ErrOffline
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}
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func (c *offlineRouting) FindProvidersAsync(ctx context.Context, k *cid.Cid, max int) <-chan pstore.PeerInfo {
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out := make(chan pstore.PeerInfo)
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close(out)
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return out
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}
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func (c *offlineRouting) Provide(_ context.Context, k *cid.Cid, _ bool) error {
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return ErrOffline
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}
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func (c *offlineRouting) Ping(ctx context.Context, p peer.ID) (time.Duration, error) {
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return 0, ErrOffline
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}
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func (c *offlineRouting) Bootstrap(context.Context) error {
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return nil
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}
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// ensure offlineRouting matches the IpfsRouting interface
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var _ routing.IpfsRouting = &offlineRouting{}
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