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96 lines
2.6 KiB
PHP
96 lines
2.6 KiB
PHP
<?php
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/*
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* Proxy.php
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*
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* -Description-
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @package LibreNMS
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* @link http://librenms.org
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* @copyright 2021 Tony Murray
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* @author Tony Murray <murraytony@gmail.com>
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*/
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namespace LibreNMS\Util;
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use LibreNMS\Config;
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class Proxy
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{
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/**
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* Check if if the proxy should be used.
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* (it should not be used for connections to localhost)
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*/
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public static function shouldBeUsed(string $target_url): bool
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{
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return preg_match('#(^|://)(localhost|127\.|::1)#', $target_url) == 0;
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}
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/**
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* Return the proxy url
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*
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* @return array|bool|false|string
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*/
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public static function get(?string $target_url = null)
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{
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if ($target_url && ! self::shouldBeUsed($target_url)) {
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return false;
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} elseif (getenv('http_proxy')) {
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return getenv('http_proxy');
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} elseif (getenv('https_proxy')) {
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return getenv('https_proxy');
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} elseif ($callback_proxy = Config::get('callback_proxy')) {
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return $callback_proxy;
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} elseif ($http_proxy = Config::get('http_proxy')) {
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return $http_proxy;
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}
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return false;
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}
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/**
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* Return the proxy url in guzzle format "http://127.0.0.1:8888"
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*/
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public static function forGuzzle(?string $target_url = null): string
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{
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$proxy = self::forCurl($target_url);
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return empty($proxy) ? '' : ('http://' . $proxy);
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}
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/**
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* Get the ip and port of the proxy
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*
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* @return string
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*/
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public static function forCurl(?string $target_url = null): string
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{
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return str_replace(['http://', 'https://'], '', rtrim(self::get($target_url), '/'));
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}
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/**
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* Set the proxy on a curl handle
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*
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* @param \CurlHandle $curl
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*/
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public static function applyToCurl($curl): void
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{
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$proxy = self::forCurl();
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if (! empty($proxy)) {
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curl_setopt($curl, CURLOPT_PROXY, $proxy);
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}
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}
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}
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