func TestRecurivePathResolution(t *testing.T) {
ctx := context.Background()
dagService := dagmock.Mock()
a, _ := randNode()
b, _ := randNode()
c, cKey := randNode()
err := b.AddNodeLink("grandchild", c)
if err != nil {
t.Fatal(err)
}
err = a.AddNodeLink("child", b)
if err != nil {
t.Fatal(err)
}
err = dagService.AddRecursive(a)
if err != nil {
t.Fatal(err)
}
aKey, err := a.Key()
if err != nil {
t.Fatal(err)
}
segments := []string{aKey.String(), "child", "grandchild"}
p, err := path.FromSegments("/ipfs/", segments...)
if err != nil {
t.Fatal(err)
}
resolver := &path.Resolver{DAG: dagService}
node, err := resolver.ResolvePath(ctx, p)
if err != nil {
t.Fatal(err)
}
key, err := node.Key()
if err != nil {
t.Fatal(err)
}
if key.String() != cKey.String() {
t.Fatal(fmt.Errorf(
"recursive path resolution failed for %s: %s != %s",
p.String(), key.String(), cKey.String()))
}
}
// Resolve resolves the given path by parsing out protocol-specific
// entries (e.g. /ipns/<node-key>) and then going through the /ipfs/
// entries and returning the final merkledage node. Effectively
// enables /ipns/, /dns/, etc. in commands.
func Resolve(ctx context.Context, n *IpfsNode, p path.Path) (*merkledag.Node, error) {
if strings.HasPrefix(p.String(), "/ipns/") {
// resolve ipns paths
// TODO(cryptix): we sould be able to query the local cache for the path
if n.Namesys == nil {
return nil, ErrNoNamesys
}
seg := p.Segments()
if len(seg) < 2 || seg[1] == "" { // just "/<protocol/>" without further segments
return nil, path.ErrNoComponents
}
extensions := seg[2:]
resolvable, err := path.FromSegments("/", seg[0], seg[1])
if err != nil {
return nil, err
}
respath, err := n.Namesys.Resolve(ctx, resolvable.String())
if err != nil {
return nil, err
}
segments := append(respath.Segments(), extensions...)
p, err = path.FromSegments("/", segments...)
if err != nil {
return nil, err
}
}
// ok, we have an ipfs path now (or what we'll treat as one)
return n.Resolver.ResolvePath(ctx, p)
}