func AddMetadataTo(n *core.IpfsNode, skey string, m *ft.Metadata) (string, error) { ukey := key.B58KeyDecode(skey) nd, err := n.DAG.Get(n.Context(), ukey) if err != nil { return "", err } mdnode := new(dag.Node) mdata, err := ft.BytesForMetadata(m) if err != nil { return "", err } mdnode.Data = mdata if err := mdnode.AddNodeLinkClean("file", nd); err != nil { return "", err } nk, err := n.DAG.Add(mdnode) if err != nil { return "", err } return nk.B58String(), nil }
func Cat(n *core.IpfsNode, pstr string) (*uio.DagReader, error) { p := path.FromString(pstr) dagNode, err := n.Resolver.ResolvePath(n.Context(), p) if err != nil { return nil, err } return uio.NewDagReader(n.Context(), dagNode, n.DAG) }
func addNode(n *core.IpfsNode, node *merkledag.Node) error { if err := n.DAG.AddRecursive(node); err != nil { // add the file to the graph + local storage return err } ctx, cancel := context.WithCancel(n.Context()) defer cancel() err := n.Pinning.Pin(ctx, node, true) // ensure we keep it return err }
func Dial(nd *core.IpfsNode, p peer.ID, protocol string) (net.Stream, error) { ctx, cancel := context.WithTimeout(nd.Context(), time.Second*30) defer cancel() err := nd.PeerHost.Connect(ctx, peer.PeerInfo{ID: p}) if err != nil { return nil, err } return nd.PeerHost.NewStream(pro.ID(protocol), p) }
func Metadata(n *core.IpfsNode, skey string) (*ft.Metadata, error) { ukey := key.B58KeyDecode(skey) nd, err := n.DAG.Get(n.Context(), ukey) if err != nil { return nil, err } return ft.MetadataFromBytes(nd.Data) }
func Listen(nd *core.IpfsNode, protocol string) (*ipfsListener, error) { ctx, cancel := context.WithCancel(nd.Context()) list := &ipfsListener{ proto: pro.ID(protocol), conCh: make(chan net.Stream), ctx: ctx, cancel: cancel, } nd.PeerHost.SetStreamHandler(list.proto, func(s net.Stream) { select { case list.conCh <- s: case <-ctx.Done(): s.Close() } }) return list, nil }