mirror of
https://github.com/PrivateBin/PrivateBin.git
synced 2025-10-03 01:39:15 +02:00
139 lines
3.4 KiB
PHP
139 lines
3.4 KiB
PHP
<?php declare(strict_types=1);
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/**
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* PrivateBin
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*
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* a zero-knowledge paste bin
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*
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* @link https://github.com/PrivateBin/PrivateBin
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* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
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* @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
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*/
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namespace PrivateBin;
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use Exception;
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/**
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* AbstractProxy
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*
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* Forwards a URL for shortening to shlink and stores the result.
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*/
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abstract class AbstractProxy
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{
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/**
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* error message
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*
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* @access private
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* @var string
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*/
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private $_error = '';
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/**
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* shortened URL
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*
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* @access private
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* @var string
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*/
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private $_url = '';
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/**
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* constructor
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*
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* initializes and runs the proxy class
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*
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* @access public
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* @param string $link
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*/
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public function __construct(Configuration $conf, $link)
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{
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if (!str_starts_with($link, $conf->getKey('basepath') . '?')) {
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$this->_error = 'Trying to shorten a URL that isn\'t pointing at our instance.';
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return;
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}
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$data = $this->_getcontents($conf, $link);
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if ($data == null) {
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$this->_error = 'Error calling proxy. Probably a configuration issue';
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error_log('Error calling proxy: ' . $this->_error);
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return;
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}
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if ($data === false) {
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$http_response_header = $http_response_header ?? array();
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$statusCode = '';
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if (!empty($http_response_header) && preg_match('/HTTP\/\d+\.\d+\s+(\d+)/', $http_response_header[0], $matches)) {
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$statusCode = $matches[1];
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}
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$this->_error = 'Error calling proxy. HTTP request failed. Status code: ' . $statusCode;
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error_log('Error calling proxy: ' . $this->_error);
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return;
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}
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try {
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$data = Json::decode($data);
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} catch (Exception $e) {
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$this->_error = 'Error calling proxy. Probably a configuration issue, like wrong or missing config keys.';
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error_log('Error calling proxy: ' . $e->getMessage());
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return;
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}
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$url = $this->_extractShortUrl($data);
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if ($url === null) {
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$this->_error = 'Error calling proxy. Probably a configuration issue, like wrong or missing config keys.';
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} else {
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$this->_url = $url;
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}
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}
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/**
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* Returns the (untranslated) error message
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*
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* @access public
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* @return string
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*/
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public function getError()
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{
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return $this->_error;
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}
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/**
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* Returns the shortened URL
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*
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* @access public
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* @return string
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*/
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public function getUrl()
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{
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return $this->_url;
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}
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/**
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* Returns true if any error has occurred
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*
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* @access public
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* @return bool
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*/
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public function isError()
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{
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return !empty($this->_error);
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}
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/**
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* Abstract method to get contents from a URL.
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*
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* @param Configuration $conf
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* @param string $link
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* @return mixed
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*/
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abstract protected function _getcontents(Configuration $conf, string $link);
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/**
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* Abstract method to extract the shortUrl from the response
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*
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* @param array $data
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* @return ?string
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*/
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abstract protected function _extractShortUrl(array $data): ?string;
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}
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