mirror of
https://github.com/ipfs/kubo.git
synced 2026-02-21 18:37:45 +08:00
76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
package core
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import (
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"context"
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"errors"
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"strings"
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namesys "github.com/ipfs/go-ipfs/namesys"
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ipld "gx/ipfs/QmRL22E4paat7ky7vx9MLpR97JHHbFPrg3ytFQw6qp1y1s/go-ipld-format"
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path "gx/ipfs/QmXgYy6EgbKrpXFtfdHumWsEMd1HrsqGXtovrfBnMgbpfy/go-path"
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resolver "gx/ipfs/QmXgYy6EgbKrpXFtfdHumWsEMd1HrsqGXtovrfBnMgbpfy/go-path/resolver"
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logging "gx/ipfs/QmbkT7eMTyXfpeyB3ZMxxcxg7XH8t6uXp49jqzz4HB7BGF/go-log"
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)
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// ErrNoNamesys is an explicit error for when an IPFS node doesn't
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// (yet) have a name system
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var ErrNoNamesys = errors.New(
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"core/resolve: no Namesys on IpfsNode - can't resolve ipns entry")
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// ResolveIPNS resolves /ipns paths
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func ResolveIPNS(ctx context.Context, nsys namesys.NameSystem, p path.Path) (path.Path, error) {
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if strings.HasPrefix(p.String(), "/ipns/") {
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evt := log.EventBegin(ctx, "resolveIpnsPath")
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defer evt.Done()
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// resolve ipns paths
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// TODO(cryptix): we should be able to query the local cache for the path
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if nsys == nil {
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evt.Append(logging.LoggableMap{"error": ErrNoNamesys.Error()})
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return "", ErrNoNamesys
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}
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seg := p.Segments()
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if len(seg) < 2 || seg[1] == "" { // just "/<protocol/>" without further segments
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evt.Append(logging.LoggableMap{"error": path.ErrNoComponents.Error()})
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return "", path.ErrNoComponents
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}
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extensions := seg[2:]
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resolvable, err := path.FromSegments("/", seg[0], seg[1])
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if err != nil {
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evt.Append(logging.LoggableMap{"error": err.Error()})
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return "", err
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}
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respath, err := nsys.Resolve(ctx, resolvable.String())
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if err != nil {
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evt.Append(logging.LoggableMap{"error": err.Error()})
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return "", err
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}
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segments := append(respath.Segments(), extensions...)
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p, err = path.FromSegments("/", segments...)
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if err != nil {
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evt.Append(logging.LoggableMap{"error": err.Error()})
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return "", err
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}
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}
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return p, nil
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}
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// Resolve resolves the given path by parsing out protocol-specific
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// entries (e.g. /ipns/<node-key>) and then going through the /ipfs/
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// entries and returning the final node.
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func Resolve(ctx context.Context, nsys namesys.NameSystem, r *resolver.Resolver, p path.Path) (ipld.Node, error) {
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p, err := ResolveIPNS(ctx, nsys, p)
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if err != nil {
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return nil, err
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}
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// ok, we have an IPFS path now (or what we'll treat as one)
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return r.ResolvePath(ctx, p)
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}
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