Begins asynchronously performing a DNS lookup for the given rrname
, and eventually calls callback
, which must
call lookup_records_async.end to get the final result.
See lookup_records for more details.
this |
a Resolver |
rrname |
the DNS name to lookup the record for |
record_type |
the type of DNS record to lookup |
cancellable |
a Cancellable, or null |
callback |
callback to call after resolution completes |
user_data |
data for |