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sakura/libraries/Whois.php

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<?php
/*
* Whois in PHP (featuring a very original name), adjusted for Sakura
* By Flashwave <http://flash.moe>
* Released under the MIT-License
*
* The MIT License (MIT)
*
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* Copyright (c) 2015 Flashwave
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
namespace Sakura;
/**
* Class Whois
* @package Sakura
*/
class Whois
{
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// Variables
public static $servers;
// Set the whois servers list
public static function setServers($serversFile)
{
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// Check if the file exists and if it does get contents.
if (file_exists($serversFile)) {
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$servers = utf8_encode(file_get_contents($serversFile));
} else {
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trigger_error('Failed to load whois servers file', E_USER_ERROR);
}
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// Parse json
if (($servers = json_decode($servers, true)) != true) {
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trigger_error('Error while parsing whois servers file JSON', E_USER_ERROR);
}
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// Check for neccesary keys
if (!array_key_exists('tld', $servers) || !array_key_exists('ip', $servers)) {
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trigger_error(
'One or more of the required whois lists isn\'t set, please check your whois servers file',
E_USER_ERROR
);
}
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// If everything is gucci set self::$servers
self::$servers = $servers;
}
// Query the whois servers
public static function query($address)
{
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// Call validate to use the right whois type
switch (self::validateAddress($address)) {
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case 1: // validateAddress returns 1 for a domain...
return self::lookupDomain($address);
case 2: // ...and 2 for both IPv4 and IPv6 (should be fine)...
return self::lookupIP($address);
case 0: // ...and 0 in case the type is invalid in which case...
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default: // ...a false is returned by this function
return false;
}
}
// Validates an address
private static function validateAddress($address)
{
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// Check if the given address is an IP address
if (filter_var($address, FILTER_VALIDATE_IP)) {
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return 2;
}
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// Check if given address is a domain name
if (preg_match("/^([-a-z0-9]{2,100})\.([a-z\.]{2,8})$/i", $address)) {
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return 1;
}
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// If unsuccessful return 0
return 0;
}
// Look up a domain
private static function lookupDomain($address)
{
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// Get list of servers
$servers = self::$servers['tld'];
// Break domain up in parts
$addressParts = explode(".", $address);
// Get TLD
$tld = strtolower(array_pop($addressParts));
// Get proper whois server address
if (!$server = $servers[$tld]) {
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return 'Error: No appropriate whois server found for the TLD '
. $tld
. ', check if the given address is correct.';
}
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// Get results from whois server
if (!$result = self::queryWhois($server, $address)) {
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// Return an error if there's no results were retrieved.
return 'Error: No results retrieved from ' . $server . ' for ' . $address . '.';
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} else {
// Assign result with heading text to return variable
$return = $address . " domain lookup results from " . $server . ":\r\n\r\n" . $result;
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// Check if there's a secondary whois server
while (strpos($result, "Whois Server:") !== false) {
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preg_match("/Whois Server: (.*)/", $return, $matches);
// If there is call it...
if (isset($matches[1])) {
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$result = self::queryWhois(($server = $matches[1]), $address);
// ...and append the retrieved values to the return variable
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$return .= "\r\n-------------\r\n\r\n"
. $address
. " domain lookup results from "
. $server
. ":\r\n"
. $result;
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}
}
}
// If all is good return the return variable
return $return;
}
// Look up an IP
private static function lookupIP($address)
{
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// Get list of servers
$servers = self::$servers['ip'];
// Set variable to keep results in
$results = [];
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// Query servers
foreach ($servers as $server) {
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// Get results
$result = self::queryWhois($server, $address);
// Assign result to results array if not in it yet
if ($result && !in_array($result, $results)) {
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$results[$server] = $result;
}
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}
// Create variable to keep return value
$return = "RESULTS FOUND: " . count($results);
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// Append results
foreach ($results as $server => $result) {
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$return .= "\r\n\r\n-------------"
. "\r\nLookup results for "
. $address
. " from "
. $server
. " server:\r\n\r\n"
. $result;
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}
// Return results
return $return;
}
// Query whois server
private static function queryWhois($server, $address, $port = 43, $timeout = 10)
{
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// Open socket
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$query = @fsockopen(
$server,
$port,
$errno,
$errstr,
$timeout
) or trigger_error(
'Failed to open socket: '
. $errno
. ' - '
. $errstr,
E_USER_ERROR
);
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// Send address
fputs($query, $address . "\r\n");
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// Await output
$out = null;
while (!feof($query)) {
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$out .= fgets($query);
}
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// Close socket
fclose($query);
// Return results
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return $out;
}
}