mirror of
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119 lines
3.1 KiB
Go
119 lines
3.1 KiB
Go
package offline
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import (
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"errors"
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"time"
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ds "github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/ipfs/go-datastore"
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key "github.com/ipfs/go-ipfs/blocks/key"
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routing "github.com/ipfs/go-ipfs/routing"
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pb "github.com/ipfs/go-ipfs/routing/dht/pb"
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record "github.com/ipfs/go-ipfs/routing/record"
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ci "gx/ipfs/QmUEUu1CM8bxBJxc3ZLojAi8evhTr4byQogWstABet79oY/go-libp2p-crypto"
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proto "gx/ipfs/QmZ4Qi3GaRbjcx28Sme5eMH7RQjGkt8wHxt2a65oLaeFEV/gogo-protobuf/proto"
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"gx/ipfs/QmZwZjMVGss5rqYsJVGy18gNbkTJffFyq2x1uJ4e4p3ZAt/go-libp2p-peer"
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context "gx/ipfs/QmZy2y8t9zQH2a1b8q2ZSLKp17ATuJoCNxxyMFG5qFExpt/go-net/context"
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logging "gx/ipfs/QmaDNZ4QMdBdku1YZWBysufYyoQt1negQGNav6PLYarbY8/go-log"
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)
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var log = logging.Logger("offlinerouting")
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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 key.Key, 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(key.DsKey(), data)
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}
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func (c *offlineRouting) GetValue(ctx context.Context, key key.Key) ([]byte, error) {
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v, err := c.datastore.Get(key.DsKey())
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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 key.Key, _ int) ([]routing.RecvdVal, error) {
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v, err := c.datastore.Get(key.DsKey())
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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) FindProviders(ctx context.Context, key key.Key) ([]peer.PeerInfo, error) {
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return nil, ErrOffline
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}
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func (c *offlineRouting) FindPeer(ctx context.Context, pid peer.ID) (peer.PeerInfo, error) {
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return peer.PeerInfo{}, ErrOffline
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}
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func (c *offlineRouting) FindProvidersAsync(ctx context.Context, k key.Key, max int) <-chan peer.PeerInfo {
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out := make(chan peer.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, key key.Key) 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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