/
resolver.go
53 lines (45 loc) · 1.62 KB
/
resolver.go
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package ipfs
import (
"context"
"github.com/ipfs-shipyard/nopfs"
"github.com/ipfs/boxo/path"
"github.com/ipfs/boxo/path/resolver"
"github.com/ipfs/go-cid"
"github.com/ipld/go-ipld-prime"
)
var _ resolver.Resolver = (*Resolver)(nil)
// Resolver implements a blocking path.Resolver.
type Resolver struct {
blocker *nopfs.Blocker
resolver resolver.Resolver
}
// WrapResolver wraps the given path Resolver with a content-blocking layer
// for Resolve operations.
func WrapResolver(res resolver.Resolver, blocker *nopfs.Blocker) resolver.Resolver {
logger.Info("Path resolved wrapped with content blocker")
return &Resolver{
blocker: blocker,
resolver: res,
}
}
// ResolveToLastNode checks if the given path is blocked before resolving.
func (res *Resolver) ResolveToLastNode(ctx context.Context, fpath path.Path) (cid.Cid, []string, error) {
if err := res.blocker.IsPathBlocked(fpath).ToError(); err != nil {
return cid.Undef, nil, err
}
return res.resolver.ResolveToLastNode(ctx, fpath)
}
// ResolvePath checks if the given path is blocked before resolving.
func (res *Resolver) ResolvePath(ctx context.Context, fpath path.Path) (ipld.Node, ipld.Link, error) {
if err := res.blocker.IsPathBlocked(fpath).ToError(); err != nil {
return nil, nil, err
}
return res.resolver.ResolvePath(ctx, fpath)
}
// ResolvePathComponents checks if the given path is blocked before resolving.
func (res *Resolver) ResolvePathComponents(ctx context.Context, fpath path.Path) ([]ipld.Node, error) {
if err := res.blocker.IsPathBlocked(fpath).ToError(); err != nil {
return nil, err
}
return res.resolver.ResolvePathComponents(ctx, fpath)
}