frostfs-sdk-go/resolver/dns.go

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package resolver
import (
"net"
cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
)
// DNS looks up NeoFS names using system DNS.
//
// See also net package.
type DNS struct{}
// ResolveContainerName looks up for DNS TXT records for the given domain name
// and returns the first one which represents valid container ID in a string format.
// Otherwise, returns an error.
//
// See also net.LookupTXT.
func (x *DNS) ResolveContainerName(name string) (*cid.ID, error) {
records, err := net.LookupTXT(name)
if err != nil {
return nil, err
}
var id cid.ID
for i := range records {
err = id.Parse(records[i])
if err == nil {
return &id, nil
}
}
return nil, errNotFound
}