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File: ProxyParser.php

<?php

declare(strict_types=1);

/**
 * @file classes/proxy/ProxyParser.php
 *
 * Copyright (c) 2014-2022 Simon Fraser University
 * Copyright (c) 2000-2022 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class ProxyParser
 *
 * @ingroup proxy
 *
 * @brief Proxy parser class
 */

namespace PKP\proxy;

class ProxyParser
{
    protected $auth = null;
    protected $proxy = null;

    public function isEmpty(): bool
    {
        return !$this->proxy;
    }

    public function parseFQDN(string $fqdn): void
    {
        $parsed = array_filter(parse_url($fqdn));

        /**
         * Was not possible to parse the proxy's FQDN (@see https://en.wikipedia.org/wiki/Fully_qualified_domain_name) or it is not a HTTP scheme, so let's return it as-is.
         */
        if (!$parsed ||
            (isset($parsed['scheme']) &&
            $parsed['scheme'] !== 'http' &&
            $parsed['scheme'] !== 'https')
        ) {
            $this->proxy = $fqdn;

            return;
        }

        $this->auth = $this->parseAuth($parsed);
        $this->proxy = $this->parseHost($parsed);

        return;
    }

    public function parseAuth(array $parsed = []): ?string
    {
        if (!isset($parsed['user']) || !isset($parsed['pass'])) {
            return null;
        }

        return base64_encode("{$parsed['user']}:{$parsed['pass']}");
    }

    public function parseHost(array $parsed = []): ?string
    {
        if (!isset($parsed['host']) || !isset($parsed['port'])) {
            return null;
        }

        return "tcp://{$parsed['host']}:{$parsed['port']}";
    }

    public function getAuth(): ?string
    {
        return $this->auth;
    }

    public function getProxy(): ?string
    {
        return $this->proxy;
    }
}