func (rs *s) Providers(c *cid.Cid) []pstore.PeerInfo {
rs.delayConf.Query.Wait() // before locking
rs.lock.RLock()
defer rs.lock.RUnlock()
k := c.KeyString()
var ret []pstore.PeerInfo
records, ok := rs.providers[k]
if !ok {
return ret
}
for _, r := range records {
if time.Now().Sub(r.Created) > rs.delayConf.ValueVisibility.Get() {
ret = append(ret, r.Peer)
}
}
for i := range ret {
j := rand.Intn(i + 1)
ret[i], ret[j] = ret[j], ret[i]
}
return ret
}
func (bs *blockstore) Get(k *cid.Cid) (blocks.Block, error) {
if k == nil {
log.Error("nil cid in blockstore")
return nil, ErrNotFound
}
maybeData, err := bs.datastore.Get(dshelp.CidToDsKey(k))
if err == ds.ErrNotFound {
return nil, ErrNotFound
}
if err != nil {
return nil, err
}
bdata, ok := maybeData.([]byte)
if !ok {
return nil, ValueTypeMismatch
}
if bs.rehash {
rbcid, err := k.Prefix().Sum(bdata)
if err != nil {
return nil, err
}
if !rbcid.Equals(k) {
return nil, ErrHashMismatch
}
return blocks.NewBlockWithCid(bdata, rbcid)
} else {
return blocks.NewBlockWithCid(bdata, k)
}
}
// FindLinks searches this nodes links for the given key,
// returns the indexes of any links pointing to it
func FindLinks(links []*cid.Cid, c *cid.Cid, start int) []int {
var out []int
for i, lnk_c := range links[start:] {
if c.Equals(lnk_c) {
out = append(out, i+start)
}
}
return out
}
func (n *dagService) GetLinks(ctx context.Context, c *cid.Cid) ([]*node.Link, error) {
if c.Type() == cid.Raw {
return nil, nil
}
node, err := n.Get(ctx, c)
if err != nil {
return nil, err
}
return node.Links(), nil
}
// NewBlockWithHash creates a new block when the hash of the data
// is already known, this is used to save time in situations where
// we are able to be confident that the data is correct
func NewBlockWithCid(data []byte, c *cid.Cid) (*BasicBlock, error) {
if u.Debug {
chkc, err := c.Prefix().Sum(data)
if err != nil {
return nil, err
}
if !chkc.Equals(c) {
return nil, ErrWrongHash
}
}
return &BasicBlock{data: data, cid: c}, nil
}
func (w *Wantlist) Remove(c *cid.Cid) bool {
k := c.KeyString()
e, ok := w.set[k]
if !ok {
return false
}
e.RefCnt--
if e.RefCnt <= 0 {
delete(w.set, k)
return true
}
return false
}
func (w *Wantlist) Add(c *cid.Cid, priority int) bool {
k := c.KeyString()
if e, ok := w.set[k]; ok {
e.RefCnt++
return false
}
w.set[k] = &Entry{
Cid: c,
Priority: priority,
RefCnt: 1,
}
return true
}
func (m *impl) addEntry(c *cid.Cid, priority int, cancel bool) {
k := c.KeyString()
e, exists := m.wantlist[k]
if exists {
e.Priority = priority
e.Cancel = cancel
} else {
m.wantlist[k] = Entry{
Entry: &wantlist.Entry{
Cid: c,
Priority: priority,
},
Cancel: cancel,
}
}
}
// if ok == false has is inconclusive
// if ok == true then has respons to question: is it contained
func (b *arccache) hasCached(k *cid.Cid) (has bool, ok bool) {
b.total.Inc()
if k == nil {
log.Error("nil cid in arccache")
// Return cache invalid so the call to blockstore happens
// in case of invalid key and correct error is created.
return false, false
}
h, ok := b.arc.Get(k.KeyString())
if ok {
b.hits.Inc()
return h.(bool), true
}
return false, false
}
func (rs *s) Announce(p pstore.PeerInfo, c *cid.Cid) error {
rs.lock.Lock()
defer rs.lock.Unlock()
k := c.KeyString()
_, ok := rs.providers[k]
if !ok {
rs.providers[k] = make(map[peer.ID]providerRecord)
}
rs.providers[k][p.ID] = providerRecord{
Created: time.Now(),
Peer: p,
}
return nil
}
// if ok == false has is inconclusive
// if ok == true then has respons to question: is it contained
func (b *bloomcache) hasCached(k *cid.Cid) (has bool, ok bool) {
b.total.Inc()
if k == nil {
log.Error("nil cid in bloom cache")
// Return cache invalid so call to blockstore
// in case of invalid key is forwarded deeper
return false, false
}
if b.BloomActive() {
blr := b.bloom.HasTS(k.Bytes())
if blr == false { // not contained in bloom is only conclusive answer bloom gives
b.hits.Inc()
return false, true
}
}
return false, false
}
// Write one edge
func (rw *RefWriter) WriteEdge(from, to *cid.Cid, linkname string) error {
if rw.Ctx != nil {
select {
case <-rw.Ctx.Done(): // just in case.
return rw.Ctx.Err()
default:
}
}
var s string
switch {
case rw.PrintFmt != "":
s = rw.PrintFmt
s = strings.Replace(s, "<src>", from.String(), -1)
s = strings.Replace(s, "<dst>", to.String(), -1)
s = strings.Replace(s, "<linkname>", linkname, -1)
default:
s += to.String()
}
rw.out <- &RefWrapper{Ref: s}
return nil
}
func CidToDsKey(k *cid.Cid) ds.Key {
return NewKeyFromBinary(k.KeyString())
}
func (b *arccache) addCache(c *cid.Cid, has bool) {
b.arc.Add(c.KeyString(), has)
}
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 node.Node
if rsegs[len(rsegs)-1] == "QmUNLLsPACCz1vLxQVkXqqLX5R1X345qqfHbsf67hvA3Nn" {
newnode = ft.EmptyDirNode()
} 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 newcid *cid.Cid
rnode, err := core.Resolve(ctx, i.node.Namesys, i.node.Resolver, 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
c, err := cid.Decode(rsegs[1])
if err != nil {
webError(w, "putHandler: bad input path", err, http.StatusBadRequest)
return
}
rnode, err := i.node.DAG.Get(ctx, c)
if err != nil {
webError(w, "putHandler: Could not create DAG from request", err, http.StatusInternalServerError)
return
}
pbnd, ok := rnode.(*dag.ProtoNode)
if !ok {
webError(w, "Cannot read non protobuf nodes through gateway", dag.ErrNotProtobuf, http.StatusBadRequest)
return
}
e := dagutils.NewDagEditor(pbnd, i.node.DAG)
err = e.InsertNodeAtPath(ctx, newPath, newnode, ft.EmptyDirNode)
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
}
newcid = nnode.Cid()
case nil:
pbnd, ok := rnode.(*dag.ProtoNode)
if !ok {
webError(w, "Cannot read non protobuf nodes through gateway", dag.ErrNotProtobuf, http.StatusBadRequest)
return
}
pbnewnode, ok := newnode.(*dag.ProtoNode)
if !ok {
webError(w, "Cannot read non protobuf nodes through gateway", dag.ErrNotProtobuf, http.StatusBadRequest)
return
}
// object set-data case
pbnd.SetData(pbnewnode.Data())
newcid, err = i.node.DAG.Add(pbnd)
if err != nil {
nnk := newnode.Cid()
rk := pbnd.Cid()
webError(w, fmt.Sprintf("putHandler: Could not add newnode(%q) to root(%q)", nnk.String(), rk.String()), 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", newcid.String())
http.Redirect(w, r, gopath.Join(ipfsPathPrefix, newcid.String(), newPath), http.StatusCreated)
}
func (w *Wantlist) Contains(k *cid.Cid) (*Entry, bool) {
e, ok := w.set[k.KeyString()]
return e, ok
}
// FromCid safely converts a cid.Cid type to a Path type
func FromCid(c *cid.Cid) Path {
return Path("/ipfs/" + c.String())
}
func (m *impl) Cancel(k *cid.Cid) {
delete(m.wantlist, k.KeyString())
m.addEntry(k, 0, true)
}
