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<object>
<window ondelete="entity:quit">
<label text="Non-blocking DNS lookups"/>
<entry name="userinput"/>
<button label="Get hostname from IP" onclick="lookup_host"/>
<button label="Get IP from hostname" onclick="lookup_ip"/>
<resolver name="first" ip="127.0.0.1" action="first_lookup_finished"/>
</window>
<?perl
sub lookup_host
{
my $ip = enode("entry.userinput")->attrib("text");
my $obj = enode("object");
$res = $obj->new_child ("resolver");
$res->attrib("action" => "host_lookup_finished");
$res->attrib("onerror" => "lookup_error");
$res->attrib("ip" => "$ip");
}
sub lookup_ip
{
my $hostname = enode("entry.userinput")->attrib("text");
my $obj = enode("object");
# Build a resolver with append_xml to verify the sync_attribs works.
my $xml =
qq!<resolver hostname="$hostname" action="ip_lookup_finished"/>!;
$obj->append_xml($xml);
}
sub first_lookup_finished
{
my ($node, $result) = @_;
print "127.0.0.1 resolves to $result\n";
$node->destroy();
}
sub host_lookup_finished
{
my ($node, $result) = @_;
print "hostname resolved to $result\n";
$node->destroy();
}
sub ip_lookup_finished
{
my ($node, $result) = @_;
print "ip resolved to $result\n";
$node->destroy();
}
sub lookup_error
{
my ($node, $error) = @_;
print "error in resolving: $error\n";
}
?>
</object>
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