func randNode() (*merkledag.Node, key.Key) {
node := new(merkledag.Node)
node.Data = make([]byte, 32)
util.NewTimeSeededRand().Read(node.Data)
k, _ := node.Key()
return node, k
}
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 randNode() (*mdag.Node, key.Key) {
nd := new(mdag.Node)
nd.Data = make([]byte, 32)
util.NewTimeSeededRand().Read(nd.Data)
k, _ := nd.Key()
return nd, k
}
func nodeFromTemplate(template string) (*dag.Node, error) {
switch template {
case "unixfs-dir":
nd := new(dag.Node)
nd.Data = ft.FolderPBData()
return nd, nil
default:
return nil, fmt.Errorf("template '%s' not found", template)
}
}
func TestAppendSingleBytesToEmpty(t *testing.T) {
ds := mdtest.Mock()
data := []byte("AB")
nd := new(merkledag.Node)
nd.Data = ft.FilePBData(nil, 0)
dbp := &h.DagBuilderParams{
Dagserv: ds,
Maxlinks: 4,
}
spl := chunk.SizeSplitterGen(500)
blks, errs := chunk.Chan(spl(bytes.NewReader(data[:1])))
ctx := context.Background()
nnode, err := TrickleAppend(ctx, nd, dbp.New(blks, errs))
if err != nil {
t.Fatal(err)
}
blks, errs = chunk.Chan(spl(bytes.NewReader(data[1:])))
nnode, err = TrickleAppend(ctx, nnode, dbp.New(blks, errs))
if err != nil {
t.Fatal(err)
}
fread, err := uio.NewDagReader(ctx, nnode, ds)
if err != nil {
t.Fatal(err)
}
out, err := ioutil.ReadAll(fread)
if err != nil {
t.Fatal(err)
}
fmt.Println(out, data)
err = arrComp(out, data)
if err != nil {
t.Fatal(err)
}
}
// converts the Node object into a real dag.Node
func deserializeNode(node *Node) (*dag.Node, error) {
dagnode := new(dag.Node)
dagnode.Data = []byte(node.Data)
dagnode.Links = make([]*dag.Link, len(node.Links))
for i, link := range node.Links {
hash, err := mh.FromB58String(link.Hash)
if err != nil {
return nil, err
}
dagnode.Links[i] = &dag.Link{
Name: link.Name,
Size: link.Size,
Hash: hash,
}
}
return dagnode, nil
}
func setDataCaller(req cmds.Request, root *dag.Node) (key.Key, error) {
if len(req.Arguments()) < 3 {
return "", fmt.Errorf("not enough arguments for set-data")
}
nd, err := req.InvocContext().GetNode()
if err != nil {
return "", err
}
root.Data = []byte(req.Arguments()[2])
newkey, err := nd.DAG.Add(root)
if err != nil {
return "", err
}
return newkey, nil
}
// dagTruncate truncates the given node to 'size' and returns the modified Node
func dagTruncate(ctx context.Context, nd *mdag.Node, size uint64, ds mdag.DAGService) (*mdag.Node, error) {
if len(nd.Links) == 0 {
// TODO: this can likely be done without marshaling and remarshaling
pbn, err := ft.FromBytes(nd.Data)
if err != nil {
return nil, err
}
nd.Data = ft.WrapData(pbn.Data[:size])
return nd, nil
}
var cur uint64
end := 0
var modified *mdag.Node
ndata := new(ft.FSNode)
for i, lnk := range nd.Links {
child, err := lnk.GetNode(ctx, ds)
if err != nil {
return nil, err
}
childsize, err := ft.DataSize(child.Data)
if err != nil {
return nil, err
}
// found the child we want to cut
if size < cur+childsize {
nchild, err := dagTruncate(ctx, child, size-cur, ds)
if err != nil {
return nil, err
}
ndata.AddBlockSize(size - cur)
modified = nchild
end = i
break
}
cur += childsize
ndata.AddBlockSize(childsize)
}
_, err := ds.Add(modified)
if err != nil {
return nil, err
}
nd.Links = nd.Links[:end]
err = nd.AddNodeLinkClean("", modified)
if err != nil {
return nil, err
}
d, err := ndata.GetBytes()
if err != nil {
return nil, err
}
nd.Data = d
// invalidate cache and recompute serialized data
_, err = nd.Encoded(true)
if err != nil {
return nil, err
}
return nd, nil
}
func ImportTar(r io.Reader, ds dag.DAGService) (*dag.Node, error) {
rall, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
r = bytes.NewReader(rall)
tr := tar.NewReader(r)
root := new(dag.Node)
root.Data = []byte("ipfs/tar")
e := dagutil.NewDagEditor(ds, root)
for {
h, err := tr.Next()
if err != nil {
if err == io.EOF {
break
}
return nil, err
}
header := new(dag.Node)
headerBytes, err := marshalHeader(h)
if err != nil {
return nil, err
}
header.Data = headerBytes
if h.Size > 0 {
spl := chunk.NewRabin(tr, uint64(chunk.DefaultBlockSize))
nd, err := importer.BuildDagFromReader(ds, spl, nil)
if err != nil {
return nil, err
}
err = header.AddNodeLinkClean("data", nd)
if err != nil {
return nil, err
}
}
_, err = ds.Add(header)
if err != nil {
return nil, err
}
path := escapePath(h.Name)
err = e.InsertNodeAtPath(context.Background(), path, header, func() *dag.Node { return new(dag.Node) })
if err != nil {
return nil, err
}
}
root = e.GetNode()
_, err = ds.Add(root)
if err != nil {
return nil, err
}
return root, nil
}
