writing files inside ipns works now! also implemented resolve cli command

cmd/ipfs/ipfs.go

@@ -53,6 +53,7 @@ Use "ipfs help <command>" for more information about a command.
 		cmdIpfsServe,
 		cmdIpfsRun,
 		cmdIpfsPub,
+		cmdIpfsResolve,
 	},
 	Flag: *flag.NewFlagSet("ipfs", flag.ExitOnError),
 }

cmd/ipfs/resolve.go

+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/gonuts/flag"
+	"github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/commander"
+	"github.com/jbenet/go-ipfs/core/commands"
+	"github.com/jbenet/go-ipfs/daemon"
+	u "github.com/jbenet/go-ipfs/util"
+)
+
+var cmdIpfsResolve = &commander.Command{
+	UsageLine: "resolve",
+	Short:     "resolve an ipns link to a hash",
+	Long: `ipfs resolve <hash>... - Resolve hash.
+
+`,
+	Run:  resolveCmd,
+	Flag: *flag.NewFlagSet("ipfs-resolve", flag.ExitOnError),
+}
+
+func resolveCmd(c *commander.Command, inp []string) error {
+	u.Debug = true
+	if len(inp) < 1 {
+		u.POut(c.Long)
+		return nil
+	}
+	conf, err := getConfigDir(c.Parent)
+	if err != nil {
+		return err
+	}
+
+	cmd := daemon.NewCommand()
+	cmd.Command = "resolve"
+	cmd.Args = inp
+	err = daemon.SendCommand(cmd, conf)
+	if err != nil {
+		now := time.Now()
+		// Resolve requires working DHT
+		n, err := localNode(conf, true)
+		if err != nil {
+			return err
+		}
+
+		took := time.Now().Sub(now)
+		fmt.Printf("localNode creation took %s\n", took.String())
+
+		return commands.Resolve(n, cmd.Args, cmd.Opts, os.Stdout)
+	}
+	return nil
+}

core/commands/publish.go

@@ -21,10 +21,9 @@ func Publish(n *core.IpfsNode, args []string, opts map[string]interface{}, out i
 	}
 
 	k := n.Identity.PrivKey
-	val := u.Key(args[0])
 
 	pub := nsys.NewPublisher(n.DAG, n.Routing)
-	err := pub.Publish(k, val)
+	err := pub.Publish(k, args[0])
 	if err != nil {
 		return err
 	}
@@ -33,7 +32,7 @@ func Publish(n *core.IpfsNode, args []string, opts map[string]interface{}, out i
 	if err != nil {
 		return err
 	}
-	fmt.Fprintf(out, "Published %s to %s\n", val, u.Key(hash).Pretty())
+	fmt.Fprintf(out, "Published %s to %s\n", args[0], u.Key(hash).Pretty())
 
 	return nil
 }

core/commands/resolve.go

+package commands
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/jbenet/go-ipfs/core"
+)
+
+func Resolve(n *core.IpfsNode, args []string, opts map[string]interface{}, out io.Writer) error {
+	res, err := n.Namesys.Resolve(args[0])
+	if err != nil {
+		return err
+	}
+
+	fmt.Fprintf(out, "%s -> %s\n", args[0], res)
+	return nil
+}

daemon/daemon.go

@@ -133,6 +133,8 @@ func (dl *DaemonListener) handleConnection(conn net.Conn) {
 		err = commands.Pin(dl.node, command.Args, command.Opts, conn)
 	case "publish":
 		err = commands.Publish(dl.node, command.Args, command.Opts, conn)
+	case "resolve":
+		err = commands.Resolve(dl.node, command.Args, command.Opts, conn)
 	default:
 		err = fmt.Errorf("Invalid Command: '%s'", command.Command)
 	}

fuse/ipns/ipns_unix.go

@@ -2,6 +2,7 @@ package ipns
 
 import (
 	"fmt"
+	"io"
 	"io/ioutil"
 	"os"
 	"os/exec"
@@ -83,6 +84,11 @@ func CreateRoot(n *core.IpfsNode, keys []ci.PrivKey, ipfsroot string) (*Root, er
 			continue
 		}
 
+		if !u.IsValidHash(pointsTo) {
+			log.Critical("Got back bad data from namesys resolve! [%s]", pointsTo)
+			return nil, nil
+		}
+
 		node, err := n.Resolver.ResolvePath(pointsTo)
 		if err != nil {
 			log.Warning("Failed to resolve value from ipns entry in ipfs")
@@ -120,7 +126,7 @@ func (*Root) Attr() fuse.Attr {
 
 // Lookup performs a lookup under this node.
 func (s *Root) Lookup(name string, intr fs.Intr) (fs.Node, fuse.Error) {
-	log.Debug("ipns: Root Lookup: '%s'", name)
+	log.Debug("ipns: Root Lookup: '%s' [intr = %s]", name, intr.String())
 	switch name {
 	case "mach_kernel", ".hidden", "._.":
 		// Just quiet some log noise on OS X.
@@ -139,14 +145,14 @@ func (s *Root) Lookup(name string, intr fs.Intr) (fs.Node, fuse.Error) {
 		return nd, nil
 	}
 
-	log.Debug("ipns: Falling back to resolution.")
+	log.Debug("ipns: Falling back to resolution for [%s].", name)
 	resolved, err := s.Ipfs.Namesys.Resolve(name)
 	if err != nil {
 		log.Error("ipns: namesys resolve error: %s", err)
 		return nil, fuse.ENOENT
 	}
 
-	return &Link{s.IpfsRoot + "/" + resolved}, nil
+	return &Link{s.IpfsRoot + "/" + u.Key(resolved).Pretty()}, nil
 }
 
 // ReadDir reads a particular directory. Disallowed for root.
@@ -221,7 +227,7 @@ func (s *Node) Attr() fuse.Attr {
 
 // Lookup performs a lookup under this node.
 func (s *Node) Lookup(name string, intr fs.Intr) (fs.Node, fuse.Error) {
-	log.Debug("ipns node Lookup '%s'", name)
+	log.Debug("ipns: node Lookup '%s'", name)
 	nd, err := s.Ipfs.Resolver.ResolveLinks(s.Nd, []string{name})
 	if err != nil {
 		// todo: make this error more versatile.
@@ -276,7 +282,7 @@ func (n *Node) Write(req *fuse.WriteRequest, resp *fuse.WriteResponse, intr fs.I
 	if n.dataBuf == nil {
 		n.dataBuf = new(bytes.Buffer)
 	}
-	log.Debug("ipns Node Write: flags = %s, offset = %d, size = %d", req.Flags.String(), req.Offset, len(req.Data))
+	log.Debug("ipns: Node Write: flags = %s, offset = %d, size = %d", req.Flags.String(), req.Offset, len(req.Data))
 	if req.Offset == 0 {
 		n.dataBuf.Reset()
 		n.dataBuf.Write(req.Data)
@@ -298,11 +304,18 @@ func (n *Node) Flush(req *fuse.FlushRequest, intr fs.Intr) fuse.Error {
 		// but for now, since the buf is all in memory anyways...
 		err := imp.NewDagInNode(n.dataBuf, n.Nd)
 		if err != nil {
-			log.Error("ipns Flush error: %s", err)
+			log.Error("ipns: Flush error: %s", err)
 			// return fuse.EVERYBAD
 			return fuse.ENODATA
 		}
 
+		read, err := mdag.NewDagReader(n.Nd, n.Ipfs.DAG)
+		if err != nil {
+			panic(err)
+		}
+
+		io.Copy(os.Stdout, read)
+
 		var root *Node
 		if n.nsRoot != nil {
 			root = n.nsRoot
@@ -312,13 +325,13 @@ func (n *Node) Flush(req *fuse.FlushRequest, intr fs.Intr) fuse.Error {
 
 		err = root.Nd.Update()
 		if err != nil {
-			log.Error("ipns dag tree update failed: %s", err)
+			log.Error("ipns: dag tree update failed: %s", err)
 			return fuse.ENODATA
 		}
 
 		err = n.Ipfs.DAG.AddRecursive(root.Nd)
 		if err != nil {
-			log.Critical("ipns Dag Add Error: %s", err)
+			log.Critical("ipns: Dag Add Error: %s", err)
 		}
 
 		n.changed = false
@@ -332,9 +345,9 @@ func (n *Node) Flush(req *fuse.FlushRequest, intr fs.Intr) fuse.Error {
 		}
 		log.Debug("Publishing changes!")
 
-		err = n.Ipfs.Publisher.Publish(root.key, ndkey)
+		err = n.Ipfs.Publisher.Publish(root.key, ndkey.Pretty())
 		if err != nil {
-			log.Error("ipns Publish Failed: %s", err)
+			log.Error("ipns: Publish Failed: %s", err)
 		}
 	}
 	return nil
@@ -433,5 +446,6 @@ func (l *Link) Attr() fuse.Attr {
 }
 
 func (l *Link) Readlink(req *fuse.ReadlinkRequest, intr fs.Intr) (string, fuse.Error) {
+	log.Debug("ReadLink: %s", l.Target)
 	return l.Target, nil
 }

importer/importer.go

@@ -67,7 +67,7 @@ func NewDagInNode(r io.Reader, n *dag.Node) error {
 
 	blkChan := DefaultSplitter.Split(r)
 	first := <-blkChan
-	n.Data = first
+	n.Data = dag.FilePBData(first)
 
 	for blk := range blkChan {
 		child := &dag.Node{Data: dag.WrapData(blk)}

namesys/nsresolver.go

 package namesys
 
 type Resolver interface {
+	// Resolve returns a base58 encoded string
 	Resolve(string) (string, error)
+
 	Matches(string) bool
 }

namesys/publisher.go

@@ -25,8 +25,8 @@ func NewPublisher(dag *mdag.DAGService, route routing.IpfsRouting) *IpnsPublishe
 }
 
 // Publish accepts a keypair and a value,
-func (p *IpnsPublisher) Publish(k ci.PrivKey, value u.Key) error {
-	log.Debug("namesys: Publish %s", value.Pretty())
+func (p *IpnsPublisher) Publish(k ci.PrivKey, value string) error {
+	log.Debug("namesys: Publish %s", value)
 	ctx := context.TODO()
 	data, err := CreateEntryData(k, value)
 	if err != nil {
@@ -66,7 +66,7 @@ func (p *IpnsPublisher) Publish(k ci.PrivKey, value u.Key) error {
 	return nil
 }
 
-func CreateEntryData(pk ci.PrivKey, val u.Key) ([]byte, error) {
+func CreateEntryData(pk ci.PrivKey, val string) ([]byte, error) {
 	entry := new(IpnsEntry)
 	sig, err := pk.Sign([]byte(val))
 	if err != nil {

namesys/resolve_test.go

@@ -7,9 +7,8 @@ import (
 	bs "github.com/jbenet/go-ipfs/blockservice"
 	ci "github.com/jbenet/go-ipfs/crypto"
 	mdag "github.com/jbenet/go-ipfs/merkledag"
-	"github.com/jbenet/go-ipfs/net/swarm"
 	"github.com/jbenet/go-ipfs/peer"
-	"github.com/jbenet/go-ipfs/routing/dht"
+	mock "github.com/jbenet/go-ipfs/routing/mock"
 	u "github.com/jbenet/go-ipfs/util"
 )
 
@@ -17,9 +16,8 @@ func TestRoutingResolve(t *testing.T) {
 	local := &peer.Peer{
 		ID: []byte("testID"),
 	}
-	net := swarm.NewSwarm(local)
 	lds := ds.NewMapDatastore()
-	d := dht.NewDHT(local, net, lds)
+	d := mock.NewMockRouter(local, lds)
 
 	bserv, err := bs.NewBlockService(lds, nil)
 	if err != nil {
@@ -40,7 +38,7 @@ func TestRoutingResolve(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	err = pub.Publish(privk, u.Key("Hello"))
+	err = pub.Publish(privk, "Hello")
 	if err != nil {
 		t.Fatal(err)
 	}

namesys/routing.go

@@ -35,6 +35,7 @@ func (r *RoutingResolver) Matches(name string) bool {
 }
 
 func (r *RoutingResolver) Resolve(name string) (string, error) {
+	log.Debug("RoutingResolve: '%s'", name)
 	ctx := context.TODO()
 	hash, err := mh.FromB58String(name)
 	if err != nil {

path/path.go

@@ -8,8 +8,11 @@ import (
 	mh "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multihash"
 	merkledag "github.com/jbenet/go-ipfs/merkledag"
 	u "github.com/jbenet/go-ipfs/util"
+	"github.com/op/go-logging"
 )
 
+var log = logging.MustGetLogger("path")
+
 // Resolver provides path resolution to IPFS
 // It has a pointer to a DAGService, which is uses to resolve nodes.
 type Resolver struct {
@@ -20,7 +23,7 @@ type Resolver struct {
 // path component as a hash (key) of the first node, then resolves
 // all other components walking the links, with ResolveLinks.
 func (s *Resolver) ResolvePath(fpath string) (*merkledag.Node, error) {
-	u.DOut("Resolve: '%s'\n", fpath)
+	log.Debug("Resolve: '%s'", fpath)
 	fpath = path.Clean(fpath)
 
 	parts := strings.Split(fpath, "/")
@@ -66,10 +69,12 @@ func (s *Resolver) ResolveLinks(ndd *merkledag.Node, names []string) (
 	for _, name := range names {
 
 		var next u.Key
+		var nlink *merkledag.Link
 		// for each of the links in nd, the current object
 		for _, link := range nd.Links {
 			if link.Name == name {
 				next = u.Key(link.Hash)
+				nlink = link
 				break
 			}
 		}
@@ -80,10 +85,15 @@ func (s *Resolver) ResolveLinks(ndd *merkledag.Node, names []string) (
 			return nil, fmt.Errorf("no link named %q under %s", name, h2)
 		}
 
-		// fetch object for link and assign to nd
-		nd, err = s.DAG.Get(next)
-		if err != nil {
-			return nd, err
+		if nlink.Node == nil {
+			// fetch object for link and assign to nd
+			nd, err = s.DAG.Get(next)
+			if err != nil {
+				return nd, err
+			}
+			nlink.Node = nd
+		} else {
+			nd = nlink.Node
 		}
 	}
 	return

routing/dht/routing.go

@@ -18,7 +18,7 @@ import (
 // PutValue adds value corresponding to given Key.
 // This is the top level "Store" operation of the DHT
 func (dht *IpfsDHT) PutValue(ctx context.Context, key u.Key, value []byte) error {
-	log.Debug("[%s] PutValue %v %v", dht.self.ID.Pretty(), key.Pretty(), value)
+	log.Debug("PutValue %s %v", key.Pretty(), value)
 	err := dht.putLocal(key, value)
 	if err != nil {
 		return err

util/util.go

@@ -11,8 +11,17 @@ import (
 	ds "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/datastore.go"
 	b58 "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-base58"
 	mh "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multihash"
+	"github.com/op/go-logging"
 )
 
+var format = "%{color}%{time} %{shortfile} %{level}: %{color:reset}%{message}"
+
+func init() {
+	backend := logging.NewLogBackend(os.Stderr, "", 0)
+	logging.SetBackend(backend)
+	logging.SetFormatter(logging.MustStringFormatter(format))
+}
+
 // Debug is a global flag for debugging.
 var Debug bool
 
@@ -42,6 +51,14 @@ func Hash(data []byte) (mh.Multihash, error) {
 	return mh.Sum(data, mh.SHA2_256, -1)
 }
 
+func IsValidHash(s string) bool {
+	out := b58.Decode(s)
+	if out == nil || len(out) == 0 {
+		return false
+	}
+	return true
+}
+
 // TildeExpansion expands a filename, which may begin with a tilde.
 func TildeExpansion(filename string) (string, error) {
 	if strings.HasPrefix(filename, "~/") {