Async DNS resolver.
The main point of the DNS component is to provide async DNS resolution. However, it is really a toolkit for working with DNS messages, and could easily be used to create a DNS server.
The most basic usage is to just create a resolver through the resolver factory. All you need to give it is a nameserver, then you can start resolving names, baby!
$loop = React\EventLoop\Factory::create();
$factory = new React\Dns\Resolver\Factory();
$dns = $factory->create('8.8.8.8', $loop);
$dns->resolve('igor.io')->then(function ($ip) {
echo "Host: $ip\n";
});But there's more.
You can cache results by configuring the resolver to use a CachedExecutor:
$loop = React\EventLoop\Factory::create();
$factory = new React\Dns\Resolver\Factory();
$dns = $factory->createCached('8.8.8.8', $loop);
$dns->resolve('igor.io')->then(function ($ip) {
echo "Host: $ip\n";
});
...
$dns->resolve('igor.io')->then(function ($ip) {
echo "Host: $ip\n";
});If the first call returns before the second, only one query will be executed. The second result will be served from cache.
- Implement message body parsing for types other than A and CNAME: NS, SOA, PTR, MX, TXT, AAAA
- Implement
authorityandadditionalmessage parts - Respect /etc/hosts