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pathresolver.go
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/
pathresolver.go
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package core
import (
"fmt"
"strings"
merkledag "github.com/ipfs/go-ipfs/merkledag"
path "github.com/ipfs/go-ipfs/path"
)
// Resolves the given path by parsing out /ipns/ entries and then going
// through the /ipfs/ entries and returning the final merkledage node.
// Effectively enables /ipns/ in CLI commands.
func Resolve(n *IpfsNode, p path.Path) (*merkledag.Node, error) {
strpath := string(p)
// for now, we only try to resolve ipns paths if
// they begin with "/ipns/". Otherwise, ambiguity
// emerges when resolving just a <hash>. Is it meant
// to be an ipfs or an ipns resolution?
if strings.HasPrefix(strpath, "/ipns/") {
// if it's an ipns path, try to resolve it.
// if we can't, we can give that error back to the user.
seg := p.Segments()
if len(seg) < 2 || seg[1] == "" { // just "/ipns/"
return nil, fmt.Errorf("invalid path: %s", string(p))
}
ipnsPath := seg[1]
extensions := seg[2:]
key, err := n.Namesys.Resolve(n.Context(), ipnsPath)
if err != nil {
return nil, err
}
pathHead := make([]string, 2)
pathHead[0] = "ipfs"
pathHead[1] = key.Pretty()
p = path.FromSegments(append(pathHead, extensions...)...)
//p = path.RebasePath(path.FromSegments(extensions...), basePath)
}
// ok, we have an ipfs path now (or what we'll treat as one)
return n.Resolver.ResolvePath(p)
}