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| 1 | <?php |
| 2 | /** |
| 3 | * PrivateBin |
| 4 | * |
| 5 | * a zero-knowledge paste bin |
| 6 | * |
| 7 | * @link https://github.com/PrivateBin/PrivateBin |
| 8 | * @copyright 2012 Sébastien SAUVAGE (sebsauvage.net) |
| 9 | * @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License |
| 10 | * @version 1.7.2 |
| 11 | */ |
| 12 | |
| 13 | namespace PrivateBin; |
| 14 | |
| 15 | use Exception; |
| 16 | |
| 17 | /** |
| 18 | * YourlsProxy |
| 19 | * |
| 20 | * Forwards a URL for shortening to YOURLS (your own URL shortener) and stores |
| 21 | * the result. |
| 22 | */ |
| 23 | class YourlsProxy |
| 24 | { |
| 25 | /** |
| 26 | * error message |
| 27 | * |
| 28 | * @access private |
| 29 | * @var string |
| 30 | */ |
| 31 | private $_error = ''; |
| 32 | |
| 33 | /** |
| 34 | * shortened URL |
| 35 | * |
| 36 | * @access private |
| 37 | * @var string |
| 38 | */ |
| 39 | private $_url = ''; |
| 40 | |
| 41 | /** |
| 42 | * constructor |
| 43 | * |
| 44 | * initializes and runs PrivateBin |
| 45 | * |
| 46 | * @access public |
| 47 | * @param string $link |
| 48 | */ |
| 49 | public function __construct(Configuration $conf, $link) |
| 50 | { |
| 51 | if (strpos($link, $conf->getKey('basepath') . '?') === false) { |
| 52 | $this->_error = 'Trying to shorten a URL that isn\'t pointing at our instance.'; |
| 53 | return; |
| 54 | } |
| 55 | |
| 56 | $yourls_api_url = $conf->getKey('apiurl', 'yourls'); |
| 57 | if (empty($yourls_api_url)) { |
| 58 | $this->_error = 'Error calling YOURLS. Probably a configuration issue, like wrong or missing "apiurl" or "signature".'; |
| 59 | return; |
| 60 | } |
| 61 | |
| 62 | $data = file_get_contents( |
| 63 | $yourls_api_url, false, stream_context_create( |
| 64 | array( |
| 65 | 'http' => array( |
| 66 | 'method' => 'POST', |
| 67 | 'header' => "Content-Type: application/x-www-form-urlencoded\r\n", |
| 68 | 'content' => http_build_query( |
| 69 | array( |
| 70 | 'signature' => $conf->getKey('signature', 'yourls'), |
| 71 | 'format' => 'json', |
| 72 | 'action' => 'shorturl', |
| 73 | 'url' => $link, |
| 74 | ) |
| 75 | ), |
| 76 | ), |
| 77 | ) |
| 78 | ) |
| 79 | ); |
| 80 | try { |
| 81 | $data = Json::decode($data); |
| 82 | } catch (Exception $e) { |
| 83 | $this->_error = 'Error calling YOURLS. Probably a configuration issue, like wrong or missing "apiurl" or "signature".'; |
| 84 | error_log('Error calling YOURLS: ' . $e->getMessage()); |
| 85 | return; |
| 86 | } |
| 87 | |
| 88 | if ( |
| 89 | !is_null($data) && |
| 90 | array_key_exists('statusCode', $data) && |
| 91 | $data['statusCode'] == 200 && |
| 92 | array_key_exists('shorturl', $data) |
| 93 | ) { |
| 94 | $this->_url = $data['shorturl']; |
| 95 | } else { |
| 96 | $this->_error = 'Error parsing YOURLS response.'; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Returns the (untranslated) error message |
| 102 | * |
| 103 | * @access public |
| 104 | * @return string |
| 105 | */ |
| 106 | public function getError() |
| 107 | { |
| 108 | return $this->_error; |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Returns the shortened URL |
| 113 | * |
| 114 | * @access public |
| 115 | * @return string |
| 116 | */ |
| 117 | public function getUrl() |
| 118 | { |
| 119 | return $this->_url; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Returns true if any error has occurred |
| 124 | * |
| 125 | * @access public |
| 126 | * @return bool |
| 127 | */ |
| 128 | public function isError() |
| 129 | { |
| 130 | return !empty($this->_error); |
| 131 | } |
| 132 | } |