// unmarshalNode returns a Record instance from its byte representation.
func unmarshalNode(buf []byte) (*dag.Node, error) {
nd, err := dag.Decoded(buf)
if err != nil {
return nil, err
}
if err := NodeHasRequiredLinks(nd, requiredLinks); err != nil {
return nil, err
}
// ok looks good.
return nd, nil
}
// objectPut takes a format option, serializes bytes from stdin and updates the dag with that data
func objectPut(n *core.IpfsNode, input io.Reader, encoding string) (*Object, error) {
data, err := ioutil.ReadAll(io.LimitReader(input, inputLimit+10))
if err != nil {
return nil, err
}
if len(data) >= inputLimit {
return nil, ErrObjectTooLarge
}
var dagnode *dag.Node
switch getObjectEnc(encoding) {
case objectEncodingJSON:
node := new(Node)
err = json.Unmarshal(data, node)
if err != nil {
return nil, err
}
// check that we have data in the Node to add
// otherwise we will add the empty object without raising an error
if node.Data == "" && len(node.Links) == 0 {
return nil, ErrEmptyNode
}
dagnode, err = deserializeNode(node)
if err != nil {
return nil, err
}
case objectEncodingProtobuf:
dagnode, err = dag.Decoded(data)
default:
return nil, ErrUnknownObjectEnc
}
if err != nil {
return nil, err
}
_, err = n.DAG.Add(dagnode)
if err != nil {
return nil, err
}
return getOutput(dagnode)
}