func (adder *Adder) addNode(node *dag.Node, path string) error {
// patch it into the root
if path == "" {
key, err := node.Key()
if err != nil {
return err
}
path = key.Pretty()
}
dir := gopath.Dir(path)
if dir != "." {
if err := mfs.Mkdir(adder.mr, dir, true, false); err != nil {
return err
}
}
if err := mfs.PutNode(adder.mr, path, node); err != nil {
return err
}
if !adder.Silent {
return outputDagnode(adder.out, path, node)
}
return nil
}
func (rw *RefWriter) writeRefsSingle(n *dag.Node) (int, error) {
nkey, err := n.Key()
if err != nil {
return 0, err
}
if rw.skip(nkey) {
return 0, nil
}
count := 0
for _, l := range n.Links {
lk := key.Key(l.Hash)
if rw.skip(lk) {
continue
}
if err := rw.WriteEdge(nkey, lk, l.Name); err != nil {
return count, err
}
count++
}
return count, nil
}
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
}
//FromDAGNode creates Records from links of merkledag n and retuns it.
//links must contain "Stamp" and "Thread"
func FromDAGNode(self *peer.Self, n *merkledag.Node, sign []byte) (*Record, error) {
r := &Record{
self: self,
Stamp: time.Unix(0, 0),
Sign: sign,
Contents: make(map[string][]byte),
}
var err error
r.Key, err = n.Key()
if log.If(err) {
return nil, err
}
for _, l := range n.Links {
nn, err := r.self.GetLinkedNode(n, l.Name)
if log.If(err) {
return nil, err
}
r.Contents[l.Name] = nn.Data
switch l.Name {
case "thread":
r.Thread = string(nn.Data)
case "stamp":
stamp := binary.BigEndian.Uint64(nn.Data)
r.Stamp = time.Unix(0, int64(stamp))
}
}
if err := r.check(false); log.If(err) {
return nil, err
}
return r, 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 (rw *RefWriter) writeRefsRecursive(n *dag.Node) (int, error) {
nkey, err := n.Key()
if err != nil {
return 0, err
}
var count int
for i, ng := range rw.DAG.GetDAG(rw.Ctx, n) {
lk := key.Key(n.Links[i].Hash)
if rw.skip(lk) {
continue
}
if err := rw.WriteEdge(nkey, lk, n.Links[i].Name); err != nil {
return count, err
}
nd, err := ng.Get(rw.Ctx)
if err != nil {
return count, err
}
c, err := rw.writeRefsRecursive(nd)
count += c
if err != nil {
return count, err
}
}
return count, nil
}
func (p *pinner) pinIndirectRecurse(ctx context.Context, node *mdag.Node) error {
k, err := node.Key()
if err != nil {
return err
}
p.indirPin.Increment(k)
return p.pinLinks(ctx, node)
}
func Diff(ctx context.Context, ds dag.DAGService, a, b *dag.Node) []*Change {
if len(a.Links) == 0 && len(b.Links) == 0 {
ak, _ := a.Key()
bk, _ := b.Key()
return []*Change{
&Change{
Type: Mod,
Before: ak,
After: bk,
},
}
}
var out []*Change
clean_a := a.Copy()
clean_b := b.Copy()
// strip out unchanged stuff
for _, lnk := range a.Links {
l, err := b.GetNodeLink(lnk.Name)
if err == nil {
if bytes.Equal(l.Hash, lnk.Hash) {
// no change... ignore it
} else {
anode, _ := lnk.GetNode(ctx, ds)
bnode, _ := l.GetNode(ctx, ds)
sub := Diff(ctx, ds, anode, bnode)
for _, subc := range sub {
subc.Path = path.Join(lnk.Name, subc.Path)
out = append(out, subc)
}
}
clean_a.RemoveNodeLink(l.Name)
clean_b.RemoveNodeLink(l.Name)
}
}
for _, lnk := range clean_a.Links {
out = append(out, &Change{
Type: Remove,
Path: lnk.Name,
Before: key.Key(lnk.Hash),
})
}
for _, lnk := range clean_b.Links {
out = append(out, &Change{
Type: Add,
Path: lnk.Name,
After: key.Key(lnk.Hash),
})
}
return out
}
//NewList returns List obj.
func NewList(self *peer.Self, key key.Key) (*List, error) {
if key == "" {
var err error
n := merkledag.Node{}
key, err = n.Key()
if log.If(err) {
return nil, err
}
}
tl := &List{
self: self,
key: key,
}
return tl, nil
}
func (t *traversal) shouldSkip(n *mdag.Node) (bool, error) {
if t.opts.SkipDuplicates {
k, err := n.Key()
if err != nil {
return true, err
}
if _, found := t.seen[string(k)]; found {
return true, nil
}
t.seen[string(k)] = struct{}{}
}
return false, nil
}
//AddDAGNode adds dagNode and returns key
func (m *Self) AddDAGNode(dagNode *merkledag.Node, pin bool) (key.Key, error) {
if err := m.ipfsNode.DAG.AddRecursive(dagNode); log.If(err) {
return "", err
}
k, err := dagNode.Key()
if log.If(err) {
return "", err
}
log.Println("added DAG", k.B58String())
if pin {
err = m.ipfsNode.Pinning.Pin(m.ctx, dagNode, true)
}
log.If(err)
return k, err
}
func (params *adder) addNode(node *dag.Node, path string) error {
// patch it into the root
if path == "" {
key, err := node.Key()
if err != nil {
return err
}
path = key.Pretty()
}
if err := params.editor.InsertNodeAtPath(params.ctx, path, node, newDirNode); err != nil {
return err
}
return outputDagnode(params.out, path, node)
}
//New returns Thread obj.
func New(self *peer.Self, name string, root key.Key) (*Thread, error) {
if root == "" {
var err error
r := merkledag.Node{}
root, err = r.Key()
if log.If(err) {
return nil, err
}
log.Println("root key", root)
}
t := &Thread{
self: self,
name: name,
root: root,
}
return t, nil
}
func getOutput(dagnode *dag.Node) (*Object, error) {
key, err := dagnode.Key()
if err != nil {
return nil, err
}
output := &Object{
Hash: key.B58String(),
Links: make([]Link, len(dagnode.Links)),
}
for i, link := range dagnode.Links {
output.Links[i] = Link{
Name: link.Name,
Hash: link.Hash.B58String(),
Size: link.Size,
}
}
return output, nil
}
func (p *pinner) unpinLinks(ctx context.Context, node *mdag.Node) error {
for _, l := range node.Links {
node, err := l.GetNode(ctx, p.dserv)
if err != nil {
return err
}
k, err := node.Key()
if err != nil {
return err
}
p.indirPin.Decrement(k)
err = p.unpinLinks(ctx, node)
if err != nil {
return err
}
}
return nil
}
// newRoot creates a new Root and starts up a republisher routine for it
func NewRoot(parent context.Context, ds dag.DAGService, node *dag.Node, pf PubFunc) (*Root, error) {
ndk, err := node.Key()
if err != nil {
return nil, err
}
var repub *Republisher
if pf != nil {
repub = NewRepublisher(parent, pf, time.Millisecond*300, time.Second*3)
repub.setVal(ndk)
go repub.Run()
}
root := &Root{
node: node,
repub: repub,
dserv: ds,
}
pbn, err := ft.FromBytes(node.Data())
if err != nil {
log.Error("IPNS pointer was not unixfs node")
return nil, err
}
switch pbn.GetType() {
case ft.TDirectory:
root.val = NewDirectory(parent, ndk.String(), node, root, ds)
case ft.TFile, ft.TMetadata, ft.TRaw:
fi, err := NewFile(ndk.String(), node, root, ds)
if err != nil {
return nil, err
}
root.val = fi
default:
panic("unrecognized! (NYI)")
}
return root, nil
}
// Pin the given node, optionally recursive
func (p *pinner) Pin(ctx context.Context, node *mdag.Node, recurse bool) error {
p.lock.Lock()
defer p.lock.Unlock()
k, err := node.Key()
if err != nil {
return err
}
if recurse {
if p.recursePin.HasKey(k) {
return nil
}
if p.directPin.HasKey(k) {
p.directPin.RemoveBlock(k)
}
// fetch entire graph
err := mdag.FetchGraph(ctx, node, p.dserv)
if err != nil {
return err
}
p.recursePin.AddBlock(k)
} else {
if _, err := p.dserv.Get(ctx, k); err != nil {
return err
}
if p.recursePin.HasKey(k) {
return fmt.Errorf("%s already pinned recursively", k.B58String())
}
p.directPin.AddBlock(k)
}
return nil
}
func (i *gatewayHandler) putHandler(w http.ResponseWriter, r *http.Request) {
// TODO(cryptix): either ask mildred about the flow of this or rewrite it
webErrorWithCode(w, "Sorry, PUT is bugged right now, closing request", errors.New("handler disabled"), http.StatusInternalServerError)
return
urlPath := r.URL.Path
pathext := urlPath[5:]
var err error
if urlPath == ipfsPathPrefix+"QmUNLLsPACCz1vLxQVkXqqLX5R1X345qqfHbsf67hvA3Nn/" {
i.putEmptyDirHandler(w, r)
return
}
var newnode *dag.Node
if pathext[len(pathext)-1] == '/' {
newnode = uio.NewEmptyDirectory()
} else {
newnode, err = i.newDagFromReader(r.Body)
if err != nil {
webError(w, "Could not create DAG from request", err, http.StatusInternalServerError)
return
}
}
ctx, cancel := context.WithCancel(i.node.Context())
defer cancel()
ipfsNode, err := core.Resolve(ctx, i.node, path.Path(urlPath))
if err != nil {
// FIXME HTTP error code
webError(w, "Could not resolve name", err, http.StatusInternalServerError)
return
}
k, err := ipfsNode.Key()
if err != nil {
webError(w, "Could not get key from resolved node", err, http.StatusInternalServerError)
return
}
h, components, err := path.SplitAbsPath(path.FromKey(k))
if err != nil {
webError(w, "Could not split path", err, http.StatusInternalServerError)
return
}
if len(components) < 1 {
err = fmt.Errorf("Cannot override existing object")
webError(w, "http gateway", err, http.StatusBadRequest)
return
}
tctx, cancel := context.WithTimeout(ctx, time.Minute)
defer cancel()
// TODO(cryptix): could this be core.Resolve() too?
rootnd, err := i.node.Resolver.DAG.Get(tctx, key.Key(h))
if err != nil {
webError(w, "Could not resolve root object", err, http.StatusBadRequest)
return
}
// resolving path components into merkledag nodes. if a component does not
// resolve, create empty directories (which will be linked and populated below.)
pathNodes, err := i.node.Resolver.ResolveLinks(tctx, rootnd, components[:len(components)-1])
if _, ok := err.(path.ErrNoLink); ok {
// Create empty directories, links will be made further down the code
for len(pathNodes) < len(components) {
pathNodes = append(pathNodes, uio.NewDirectory(i.node.DAG).GetNode())
}
} else if err != nil {
webError(w, "Could not resolve parent object", err, http.StatusBadRequest)
return
}
for i := len(pathNodes) - 1; i >= 0; i-- {
newnode, err = pathNodes[i].UpdateNodeLink(components[i], newnode)
if err != nil {
webError(w, "Could not update node links", err, http.StatusInternalServerError)
return
}
}
err = i.node.DAG.AddRecursive(newnode)
if err != nil {
webError(w, "Could not add recursively new node", err, http.StatusInternalServerError)
return
}
// Redirect to new path
key, err := newnode.Key()
if err != nil {
webError(w, "Could not get key of new node", err, http.StatusInternalServerError)
return
}
i.addUserHeaders(w) // ok, _now_ write user's headers.
w.Header().Set("IPFS-Hash", key.String())
http.Redirect(w, r, ipfsPathPrefix+key.String()+"/"+strings.Join(components, "/"), http.StatusCreated)
}
func (i *gatewayHandler) putHandler(w http.ResponseWriter, r *http.Request) {
// TODO(cryptix): move me to ServeHTTP and pass into all handlers
ctx, cancel := context.WithCancel(i.node.Context())
defer cancel()
rootPath, err := path.ParsePath(r.URL.Path)
if err != nil {
webError(w, "putHandler: ipfs path not valid", err, http.StatusBadRequest)
return
}
rsegs := rootPath.Segments()
if rsegs[0] == ipnsPathPrefix {
webError(w, "putHandler: updating named entries not supported", errors.New("WritableGateway: ipns put not supported"), http.StatusBadRequest)
return
}
var newnode *dag.Node
if rsegs[len(rsegs)-1] == "QmUNLLsPACCz1vLxQVkXqqLX5R1X345qqfHbsf67hvA3Nn" {
newnode = uio.NewEmptyDirectory()
} else {
putNode, err := i.newDagFromReader(r.Body)
if err != nil {
webError(w, "putHandler: Could not create DAG from request", err, http.StatusInternalServerError)
return
}
newnode = putNode
}
var newPath string
if len(rsegs) > 1 {
newPath = path.Join(rsegs[2:])
}
var newkey key.Key
rnode, err := core.Resolve(ctx, i.node, rootPath)
switch ev := err.(type) {
case path.ErrNoLink:
// ev.Node < node where resolve failed
// ev.Name < new link
// but we need to patch from the root
rnode, err := i.node.DAG.Get(ctx, key.B58KeyDecode(rsegs[1]))
if err != nil {
webError(w, "putHandler: Could not create DAG from request", err, http.StatusInternalServerError)
return
}
e := dagutils.NewDagEditor(rnode, i.node.DAG)
err = e.InsertNodeAtPath(ctx, newPath, newnode, uio.NewEmptyDirectory)
if err != nil {
webError(w, "putHandler: InsertNodeAtPath failed", err, http.StatusInternalServerError)
return
}
nnode, err := e.Finalize(i.node.DAG)
if err != nil {
webError(w, "putHandler: could not get node", err, http.StatusInternalServerError)
return
}
newkey, err = nnode.Key()
if err != nil {
webError(w, "putHandler: could not get key of edited node", err, http.StatusInternalServerError)
return
}
case nil:
// object set-data case
rnode.Data = newnode.Data
newkey, err = i.node.DAG.Add(rnode)
if err != nil {
nnk, _ := newnode.Key()
rk, _ := rnode.Key()
webError(w, fmt.Sprintf("putHandler: Could not add newnode(%q) to root(%q)", nnk.B58String(), rk.B58String()), err, http.StatusInternalServerError)
return
}
default:
log.Warningf("putHandler: unhandled resolve error %T", ev)
webError(w, "could not resolve root DAG", ev, http.StatusInternalServerError)
return
}
i.addUserHeaders(w) // ok, _now_ write user's headers.
w.Header().Set("IPFS-Hash", newkey.String())
http.Redirect(w, r, gopath.Join(ipfsPathPrefix, newkey.String(), newPath), http.StatusCreated)
}
