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<?php |
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namespace MallardDuck\Whois; |
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use Hoa\Socket\Client as SocketClient; |
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use MallardDuck\Whois\WhoisClientInterface; |
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/** |
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* The Whois Client Class. |
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* |
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* @author mallardduck <[email protected]> |
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* |
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* @copyright lucidinternets.com 2018 |
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* |
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* @version 0.4.0 |
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*/ |
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abstract class AbstractWhoisClient implements WhoisClientInterface |
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{ |
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/** |
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* The carriage return line feed character comobo. |
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* @var string |
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*/ |
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protected $clrf = "\r\n"; |
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/** |
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* The timeout duration used for WhoIs server lookups. |
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* @var int |
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*/ |
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const TIMEOUT = 10; |
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/** |
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* The input domain provided by the user. |
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* @var SocketClient |
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*/ |
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protected $connection; |
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/** |
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* Perform a Whois lookup. |
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* |
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* Performs a Whois request using the given input for lookup and the Whois |
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* server values. |
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* |
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* @param string $lookupValue The domain or IP being looked up. |
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* @param string $whoisServer The whois server being queried. |
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* |
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* @return string The raw text results of the query response. |
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*/ |
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public function makeRequest(string $lookupValue, string $whoisServer) : string |
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{ |
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$this->createConnection($whoisServer); |
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$this->writeRequest($lookupValue); |
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return $this->getResponseAndClose(); |
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} |
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/** |
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* Creates a socket connection to the whois server and activates it. |
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* |
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* @param string $whoisServer The whois server domain or IP being queried. |
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*/ |
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final public function createConnection(string $whoisServer) : void |
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{ |
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// Form a TCP socket connection to the whois server. |
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$this->connection = new SocketClient('tcp://'.$whoisServer.':43', self::TIMEOUT); |
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$this->connection->connect(); |
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} |
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/** |
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* Writes a whois request to the active socket connection. |
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* |
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* @param string $lookupValue The cache item to save. |
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* |
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* @return int|bool Either an int of the return code, or false on some errors. |
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*/ |
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final public function writeRequest(string $lookupValue) |
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{ |
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// Send the domain name requested for whois lookup. |
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return $this->connection->writeString($lookupValue.$this->clrf); |
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} |
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/** |
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* A method for retrieving a raw Whois response. |
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* |
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* This method must retrieve the reponse from the active socket and then |
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* close the socket. If the connection is not properly closed servers could |
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* drop/ignore rapid subsequent requests. |
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* |
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* @return string The raw results of the query response. |
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*/ |
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final public function getResponseAndClose() : string |
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{ |
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// Read the full output of the whois lookup. |
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$response = $this->connection->readAll(); |
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// Disconnect the connections after use in order to prevent observed |
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// network & performance issues. Not doing this caused mild trottling. |
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$this->connection->disconnect(); |
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return $response; |
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} |
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} |
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mallardduck /
php-whois-client
