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2 daniel-mar 1 
<?php
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#
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#  VGWhoIs (ViaThinkSoft Global WhoIs, a fork of generic Whois / gwhois)
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#  Common functions in PHP
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#
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#  (c) 2013-2019 by Daniel Marschall, ViaThinkSoft <info@daniel-marschall.de>
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#
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#  License: https://www.gnu.org/licenses/gpl-2.0.html (GPL version 2)
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#
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function getpatternfiles() {
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        $out = array();
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        $files = glob(__DIR__ . '/../../main/pattern/'.'*');
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        foreach ($files as &$file) {
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                if (preg_match('@^\.@',     $file)) continue;
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                $out[] = $file;
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        }
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        return $out;
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}
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function get_united_pattern() {
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        $cont = '';
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        $files = getpatternfiles();
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        foreach ($files as &$file) {
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                $cont .= file_get_contents($file)."\n\n";
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        }
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        return $cont;
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}
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function cached_file($url, $cache_dir, $max_age = /* 24*60*60 */ 86400) {
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        $opts = [
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            "http" => [
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                "method" => "GET",
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                "header" => "User-Agent: Google Chrome Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36.\r\n"
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            ]
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        ];
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        $context = stream_context_create($opts);
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        $cachefile = $cache_dir . '/' . sha1($url) . '.cache';
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        if (!is_dir($cache_dir)) mkdir($cache_dir, 0755, true);
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        if (file_age($cachefile) > $max_age) {
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                $cont = file_get_contents($url, 0, $context);
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                file_put_contents($cachefile, $cont);
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        } else {
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                $cont = file_get_contents($cachefile);
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        }
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        if ($cont === false) {
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                throw new Exception("Failed to get contents from $url");
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        }
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        return $cont;
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}