NAME
Mojo::IOLoop::Resolver - IOLoop DNS stub resolver
SYNOPSIS
use Mojo::IOLoop::Resolver;
# Lookup address
my $resolver = Mojo::IOLoop::Resolver->new;
$resolver->lookup('mojolicio.us' => sub {
my ($self, $address) = @_;
...
});
# Resolve "MX" records
$resolver->resolve('mojolicio.us', 'MX', sub {
my ($self, $records) = @_;
...
});DESCRIPTION
Mojo::IOLoop::Resolver is a minimalistic non-blocking I/O DNS stub resolver used by Mojo:IOLoop. Note that this module is EXPERIMENTAL and might change without warning!
ATTRIBUTES
Mojo::IOLoop::Resolver implements the following attributes.
ioloop
my $ioloop = $resolver->ioloop;
$resolver = $resolver->ioloop(Mojo::IOLoop->new);Loop object to use for I/O operations, defaults to a Mojo::IOLoop object.
timeout
my $timeout = $resolver->timeout;
$resolver = $resolver->timeout(5);Maximum time in seconds a DNS lookup can take, defaults to 3.
METHODS
Mojo::IOLoop::Resolver inherits all methods from Mojo::Base and implements the following new ones.
build
my $req = $resolver->build($id, 'A', 'mojolicio.us');Build DNS request.
is_ipv4
my $success = $resolver->is_ipv4('127.0.0.1');Check if value is a valid IPv4 address.
is_ipv6
my $success = $resolver->is_ipv6('::1');Check if value is a valid IPv6 address.
lookup
$resolver->lookup('mojolicio.us' => sub {...});Lookup IPv4 or IPv6 address for domain.
$resolver->lookup('mojolicio.us' => sub {
my ($loop, $address) = @_;
say "Address: $address";
Mojo::IOLoop->stop;
});
Mojo::IOLoop->start;parse
my ($id, $answers) = $resolver->parse($res);Parse DNS reponse.
resolve
$resolver->resolve('mojolicio.us', 'A', sub {...});Resolve domain into A, AAAA, CNAME, MX, NS, PTR or TXT records, * will query for all at once. Since this is a "stub resolver" it depends on a recursive name server for DNS resolution.
servers
my @all = $resolver->servers;
my $current = $resolver->servers;
$resolver->servers('8.8.8.8', '8.8.4.4');IP addresses of DNS servers used for lookups, defaults to the value of the MOJO_DNS_SERVER environment variable, auto detection, 8.8.8.8 or 8.8.4.4.
DEBUGGING
You can set the MOJO_RESOLVER_DEBUG environment variable to get some advanced diagnostics information printed to STDERR.
MOJO_RESOLVER_DEBUG=1