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| 1 | <?php declare(strict_types=1); |
| 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 | */ |
| 11 | |
| 12 | namespace PrivateBin\Data; |
| 13 | |
| 14 | use Exception; |
| 15 | use PDO; |
| 16 | use PDOException; |
| 17 | use PrivateBin\Controller; |
| 18 | use PrivateBin\Exception\JsonException; |
| 19 | use PrivateBin\Json; |
| 20 | |
| 21 | /** |
| 22 | * Database |
| 23 | * |
| 24 | * Model for database access, implemented as a singleton. |
| 25 | */ |
| 26 | class Database extends AbstractData |
| 27 | { |
| 28 | /** |
| 29 | * instance of database connection |
| 30 | * |
| 31 | * @access private |
| 32 | * @var PDO |
| 33 | */ |
| 34 | private $_db; |
| 35 | |
| 36 | /** |
| 37 | * table prefix |
| 38 | * |
| 39 | * @access private |
| 40 | * @var string |
| 41 | */ |
| 42 | private $_prefix = ''; |
| 43 | |
| 44 | /** |
| 45 | * database type |
| 46 | * |
| 47 | * @access private |
| 48 | * @var string |
| 49 | */ |
| 50 | private $_type = ''; |
| 51 | |
| 52 | /** |
| 53 | * instantiates a new Database data backend |
| 54 | * |
| 55 | * @access public |
| 56 | * @param array $options |
| 57 | * @throws Exception |
| 58 | */ |
| 59 | public function __construct(array $options) |
| 60 | { |
| 61 | // set table prefix if given |
| 62 | if (array_key_exists('tbl', $options)) { |
| 63 | $this->_prefix = $options['tbl']; |
| 64 | } |
| 65 | |
| 66 | // initialize the db connection with new options |
| 67 | if ( |
| 68 | array_key_exists('dsn', $options) && |
| 69 | array_key_exists('usr', $options) && |
| 70 | array_key_exists('pwd', $options) && |
| 71 | array_key_exists('opt', $options) |
| 72 | ) { |
| 73 | // set default options |
| 74 | $options['opt'][PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION; |
| 75 | $options['opt'][PDO::ATTR_EMULATE_PREPARES] = false; |
| 76 | if (!array_key_exists(PDO::ATTR_PERSISTENT, $options['opt'])) { |
| 77 | $options['opt'][PDO::ATTR_PERSISTENT] = true; |
| 78 | } |
| 79 | $db_tables_exist = true; |
| 80 | |
| 81 | // setup type and dabase connection |
| 82 | $this->_type = strtolower( |
| 83 | substr($options['dsn'], 0, strpos($options['dsn'], ':')) |
| 84 | ); |
| 85 | // MySQL uses backticks to quote identifiers by default, |
| 86 | // tell it to expect ANSI SQL double quotes |
| 87 | if ($this->_type === 'mysql') { |
| 88 | // deprecated as of PHP 8.5 |
| 89 | if (version_compare(PHP_VERSION, '8.5') < 0 && defined('PDO::MYSQL_ATTR_INIT_COMMAND')) { |
| 90 | $options['opt'][PDO::MYSQL_ATTR_INIT_COMMAND] = "SET SESSION sql_mode='ANSI_QUOTES'"; |
| 91 | } elseif (defined('Pdo\Mysql::ATTR_INIT_COMMAND')) { |
| 92 | $options['opt'][Pdo\Mysql::ATTR_INIT_COMMAND] = "SET SESSION sql_mode='ANSI_QUOTES'"; |
| 93 | } |
| 94 | } |
| 95 | $tableQuery = $this->_getTableQuery($this->_type); |
| 96 | $this->_db = new PDO( |
| 97 | $options['dsn'], |
| 98 | $options['usr'], |
| 99 | $options['pwd'], |
| 100 | $options['opt'] |
| 101 | ); |
| 102 | |
| 103 | // check if the database contains the required tables |
| 104 | $tables = $this->_db->query($tableQuery)->fetchAll(PDO::FETCH_COLUMN, 0); |
| 105 | |
| 106 | // create paste table if necessary |
| 107 | if (!in_array($this->_sanitizeIdentifier('paste'), $tables)) { |
| 108 | $this->_createPasteTable(); |
| 109 | $db_tables_exist = false; |
| 110 | } |
| 111 | |
| 112 | // create comment table if necessary |
| 113 | if (!in_array($this->_sanitizeIdentifier('comment'), $tables)) { |
| 114 | $this->_createCommentTable(); |
| 115 | $db_tables_exist = false; |
| 116 | } |
| 117 | |
| 118 | // create config table if necessary |
| 119 | $db_version = Controller::VERSION; |
| 120 | if (!in_array($this->_sanitizeIdentifier('config'), $tables)) { |
| 121 | $this->_createConfigTable(); |
| 122 | // if we only needed to create the config table, the DB is older then 0.22 |
| 123 | if ($db_tables_exist) { |
| 124 | $db_version = '0.21'; |
| 125 | } |
| 126 | } else { |
| 127 | $db_version = $this->_getConfig('VERSION'); |
| 128 | } |
| 129 | |
| 130 | // update database structure if necessary |
| 131 | if (version_compare($db_version, Controller::VERSION, '<')) { |
| 132 | $this->_upgradeDatabase($db_version); |
| 133 | } |
| 134 | } else { |
| 135 | throw new Exception( |
| 136 | 'Missing configuration for key dsn, usr, pwd or opt in the section model_options, please check your configuration file', 6 |
| 137 | ); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Create a paste. |
| 143 | * |
| 144 | * @access public |
| 145 | * @param string $pasteid |
| 146 | * @param array $paste |
| 147 | * @return bool |
| 148 | */ |
| 149 | public function create($pasteid, array &$paste) |
| 150 | { |
| 151 | $expire_date = 0; |
| 152 | $meta = $paste['meta']; |
| 153 | if (array_key_exists('expire_date', $meta)) { |
| 154 | $expire_date = (int) $meta['expire_date']; |
| 155 | unset($meta['expire_date']); |
| 156 | } |
| 157 | try { |
| 158 | return $this->_exec( |
| 159 | 'INSERT INTO "' . $this->_sanitizeIdentifier('paste') . |
| 160 | '" VALUES(?,?,?,?)', |
| 161 | array( |
| 162 | $pasteid, |
| 163 | Json::encode($paste), |
| 164 | $expire_date, |
| 165 | Json::encode($meta), |
| 166 | ) |
| 167 | ); |
| 168 | } catch (Exception $e) { |
| 169 | error_log('Error while attempting to insert a paste into the database: ' . $e->getMessage()); |
| 170 | return false; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Read a paste. |
| 176 | * |
| 177 | * @access public |
| 178 | * @param string $pasteid |
| 179 | * @return array|false |
| 180 | */ |
| 181 | public function read($pasteid) |
| 182 | { |
| 183 | try { |
| 184 | $row = $this->_select( |
| 185 | 'SELECT * FROM "' . $this->_sanitizeIdentifier('paste') . |
| 186 | '" WHERE "dataid" = ?', array($pasteid), true |
| 187 | ); |
| 188 | } catch (PDOException $e) { |
| 189 | $row = false; |
| 190 | } |
| 191 | if ($row === false) { |
| 192 | return false; |
| 193 | } |
| 194 | // create array |
| 195 | try { |
| 196 | $paste = Json::decode($row['data']); |
| 197 | } catch (JsonException $e) { |
| 198 | error_log('Error while reading a paste from the database: ' . $e->getMessage()); |
| 199 | $paste = array(); |
| 200 | } |
| 201 | |
| 202 | try { |
| 203 | $paste['meta'] = Json::decode($row['meta']); |
| 204 | } catch (JsonException $e) { |
| 205 | error_log('Error while reading a paste from the database: ' . $e->getMessage()); |
| 206 | $paste['meta'] = array(); |
| 207 | } |
| 208 | $expire_date = (int) $row['expiredate']; |
| 209 | if ($expire_date > 0) { |
| 210 | $paste['meta']['expire_date'] = $expire_date; |
| 211 | } |
| 212 | |
| 213 | return $paste; |
| 214 | } |
| 215 | |
| 216 | /** |
| 217 | * Delete a paste and its discussion. |
| 218 | * |
| 219 | * @access public |
| 220 | * @param string $pasteid |
| 221 | */ |
| 222 | public function delete($pasteid) |
| 223 | { |
| 224 | $this->_exec( |
| 225 | 'DELETE FROM "' . $this->_sanitizeIdentifier('paste') . |
| 226 | '" WHERE "dataid" = ?', array($pasteid) |
| 227 | ); |
| 228 | $this->_exec( |
| 229 | 'DELETE FROM "' . $this->_sanitizeIdentifier('comment') . |
| 230 | '" WHERE "pasteid" = ?', array($pasteid) |
| 231 | ); |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Test if a paste exists. |
| 236 | * |
| 237 | * @access public |
| 238 | * @param string $pasteid |
| 239 | * @return bool |
| 240 | */ |
| 241 | public function exists($pasteid) |
| 242 | { |
| 243 | try { |
| 244 | $row = $this->_select( |
| 245 | 'SELECT "dataid" FROM "' . $this->_sanitizeIdentifier('paste') . |
| 246 | '" WHERE "dataid" = ?', array($pasteid), true |
| 247 | ); |
| 248 | } catch (PDOException $e) { |
| 249 | return false; |
| 250 | } |
| 251 | return (bool) $row; |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Create a comment in a paste. |
| 256 | * |
| 257 | * @access public |
| 258 | * @param string $pasteid |
| 259 | * @param string $parentid |
| 260 | * @param string $commentid |
| 261 | * @param array $comment |
| 262 | * @return bool |
| 263 | */ |
| 264 | public function createComment($pasteid, $parentid, $commentid, array &$comment) |
| 265 | { |
| 266 | try { |
| 267 | $data = Json::encode($comment); |
| 268 | } catch (JsonException $e) { |
| 269 | error_log('Error while attempting to insert a comment into the database: ' . $e->getMessage()); |
| 270 | return false; |
| 271 | } |
| 272 | $meta = $comment['meta']; |
| 273 | if (!array_key_exists('icon', $meta)) { |
| 274 | $meta['icon'] = null; |
| 275 | } |
| 276 | try { |
| 277 | return $this->_exec( |
| 278 | 'INSERT INTO "' . $this->_sanitizeIdentifier('comment') . |
| 279 | '" VALUES(?,?,?,?,?,?)', |
| 280 | array( |
| 281 | $commentid, |
| 282 | $pasteid, |
| 283 | $parentid, |
| 284 | $data, |
| 285 | $meta['icon'], |
| 286 | $meta['created'], |
| 287 | ) |
| 288 | ); |
| 289 | } catch (PDOException $e) { |
| 290 | error_log('Error while attempting to insert a comment into the database: ' . $e->getMessage()); |
| 291 | return false; |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Read all comments of paste. |
| 297 | * |
| 298 | * @access public |
| 299 | * @param string $pasteid |
| 300 | * @return array |
| 301 | */ |
| 302 | public function readComments($pasteid) |
| 303 | { |
| 304 | $rows = $this->_select( |
| 305 | 'SELECT * FROM "' . $this->_sanitizeIdentifier('comment') . |
| 306 | '" WHERE "pasteid" = ?', array($pasteid) |
| 307 | ); |
| 308 | |
| 309 | // create comment list |
| 310 | $comments = array(); |
| 311 | if (count($rows)) { |
| 312 | foreach ($rows as $row) { |
| 313 | try { |
| 314 | $data = Json::decode($row['data']); |
| 315 | } catch (JsonException $e) { |
| 316 | error_log('Error while reading a comment from the database: ' . $e->getMessage()); |
| 317 | $data = array(); |
| 318 | } |
| 319 | $i = $this->getOpenSlot($comments, (int) $row['postdate']); |
| 320 | $comments[$i] = $data; |
| 321 | $comments[$i]['id'] = $row['dataid']; |
| 322 | $comments[$i]['parentid'] = $row['parentid']; |
| 323 | $comments[$i]['meta'] = array('created' => (int) $row['postdate']); |
| 324 | if (array_key_exists('vizhash', $row) && !empty($row['vizhash'])) { |
| 325 | $comments[$i]['meta']['icon'] = $row['vizhash']; |
| 326 | } |
| 327 | } |
| 328 | ksort($comments); |
| 329 | } |
| 330 | return $comments; |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * Test if a comment exists. |
| 335 | * |
| 336 | * @access public |
| 337 | * @param string $pasteid |
| 338 | * @param string $parentid |
| 339 | * @param string $commentid |
| 340 | * @return bool |
| 341 | */ |
| 342 | public function existsComment($pasteid, $parentid, $commentid) |
| 343 | { |
| 344 | try { |
| 345 | return (bool) $this->_select( |
| 346 | 'SELECT "dataid" FROM "' . $this->_sanitizeIdentifier('comment') . |
| 347 | '" WHERE "pasteid" = ? AND "parentid" = ? AND "dataid" = ?', |
| 348 | array($pasteid, $parentid, $commentid), true |
| 349 | ); |
| 350 | } catch (PDOException $e) { |
| 351 | return false; |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * Save a value. |
| 357 | * |
| 358 | * @access public |
| 359 | * @param string $value |
| 360 | * @param string $namespace |
| 361 | * @param string $key |
| 362 | * @return bool |
| 363 | */ |
| 364 | public function setValue($value, $namespace, $key = '') |
| 365 | { |
| 366 | if ($namespace === 'traffic_limiter') { |
| 367 | $this->_last_cache[$key] = $value; |
| 368 | try { |
| 369 | $value = Json::encode($this->_last_cache); |
| 370 | } catch (JsonException $e) { |
| 371 | error_log('Error encoding JSON for table "config", row "traffic_limiter": ' . $e->getMessage()); |
| 372 | return false; |
| 373 | } |
| 374 | } |
| 375 | return $this->_exec( |
| 376 | 'UPDATE "' . $this->_sanitizeIdentifier('config') . |
| 377 | '" SET "value" = ? WHERE "id" = ?', |
| 378 | array($value, strtoupper($namespace)) |
| 379 | ); |
| 380 | } |
| 381 | |
| 382 | /** |
| 383 | * Load a value. |
| 384 | * |
| 385 | * @access public |
| 386 | * @param string $namespace |
| 387 | * @param string $key |
| 388 | * @return string |
| 389 | */ |
| 390 | public function getValue($namespace, $key = '') |
| 391 | { |
| 392 | $configKey = strtoupper($namespace); |
| 393 | $value = $this->_getConfig($configKey); |
| 394 | if ($value === '') { |
| 395 | // initialize the row, so that setValue can rely on UPDATE queries |
| 396 | $this->_exec( |
| 397 | 'INSERT INTO "' . $this->_sanitizeIdentifier('config') . |
| 398 | '" VALUES(?,?)', |
| 399 | array($configKey, '') |
| 400 | ); |
| 401 | |
| 402 | // migrate filesystem based salt into database |
| 403 | $file = 'data' . DIRECTORY_SEPARATOR . 'salt.php'; |
| 404 | if ($namespace === 'salt' && is_readable($file)) { |
| 405 | $fs = new Filesystem(array('dir' => 'data')); |
| 406 | $value = $fs->getValue('salt'); |
| 407 | $this->setValue($value, 'salt'); |
| 408 | if (!unlink($file)) { |
| 409 | error_log('Error deleting migrated salt: ' . $file); |
| 410 | } |
| 411 | return $value; |
| 412 | } |
| 413 | } |
| 414 | if ($value && $namespace === 'traffic_limiter') { |
| 415 | try { |
| 416 | $this->_last_cache = Json::decode($value); |
| 417 | } catch (JsonException $e) { |
| 418 | error_log('Error decoding JSON from table "config", row "traffic_limiter": ' . $e->getMessage()); |
| 419 | $this->_last_cache = array(); |
| 420 | } |
| 421 | if (array_key_exists($key, $this->_last_cache)) { |
| 422 | return $this->_last_cache[$key]; |
| 423 | } |
| 424 | } |
| 425 | return (string) $value; |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * Returns up to batch size number of paste ids that have expired |
| 430 | * |
| 431 | * @access private |
| 432 | * @param int $batchsize |
| 433 | * @return array |
| 434 | */ |
| 435 | protected function _getExpiredPastes($batchsize) |
| 436 | { |
| 437 | try { |
| 438 | $statement = $this->_db->prepare( |
| 439 | 'SELECT "dataid" FROM "' . $this->_sanitizeIdentifier('paste') . |
| 440 | '" WHERE "expiredate" < ? AND "expiredate" != ? ' . |
| 441 | ($this->_type === 'oci' ? 'FETCH NEXT ? ROWS ONLY' : 'LIMIT ?') |
| 442 | ); |
| 443 | $statement->execute(array(time(), 0, $batchsize)); |
| 444 | return $statement->fetchAll(PDO::FETCH_COLUMN, 0); |
| 445 | } catch (PDOException $e) { |
| 446 | error_log('Error while attempting to find expired pastes in the database: ' . $e->getMessage()); |
| 447 | return array(); |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | /** |
| 452 | * @inheritDoc |
| 453 | */ |
| 454 | public function getAllPastes() |
| 455 | { |
| 456 | return $this->_db->query( |
| 457 | 'SELECT "dataid" FROM "' . $this->_sanitizeIdentifier('paste') . '"' |
| 458 | )->fetchAll(PDO::FETCH_COLUMN, 0); |
| 459 | } |
| 460 | |
| 461 | /** |
| 462 | * execute a statement |
| 463 | * |
| 464 | * @access private |
| 465 | * @param string $sql |
| 466 | * @param array $params |
| 467 | * @throws PDOException |
| 468 | * @return bool |
| 469 | */ |
| 470 | private function _exec($sql, array $params) |
| 471 | { |
| 472 | $statement = $this->_db->prepare($sql); |
| 473 | $position = 1; |
| 474 | foreach ($params as &$parameter) { |
| 475 | if (is_int($parameter)) { |
| 476 | $statement->bindParam($position, $parameter, PDO::PARAM_INT); |
| 477 | } elseif (is_string($parameter) && strlen($parameter) >= 4000) { |
| 478 | $statement->bindParam($position, $parameter, PDO::PARAM_STR, strlen($parameter)); |
| 479 | } else { |
| 480 | $statement->bindParam($position, $parameter); |
| 481 | } |
| 482 | ++$position; |
| 483 | } |
| 484 | $result = $statement->execute(); |
| 485 | $statement->closeCursor(); |
| 486 | return $result; |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * run a select statement |
| 491 | * |
| 492 | * @access private |
| 493 | * @param string $sql |
| 494 | * @param array $params |
| 495 | * @param bool $firstOnly if only the first row should be returned |
| 496 | * @throws PDOException |
| 497 | * @return array |
| 498 | */ |
| 499 | private function _select($sql, array $params, $firstOnly = false) |
| 500 | { |
| 501 | $statement = $this->_db->prepare($sql); |
| 502 | $statement->execute($params); |
| 503 | if ($firstOnly) { |
| 504 | $result = $statement->fetch(PDO::FETCH_ASSOC); |
| 505 | if ($this->_type === 'oci' && is_array($result)) { |
| 506 | // returned CLOB values are streams, convert these into strings |
| 507 | $result = array_map('PrivateBin\Data\Database::_sanitizeClob', $result); |
| 508 | } |
| 509 | } elseif ($this->_type === 'oci') { |
| 510 | // workaround for https://bugs.php.net/bug.php?id=46728 |
| 511 | $result = array(); |
| 512 | while ($row = $statement->fetch(PDO::FETCH_ASSOC)) { |
| 513 | $result[] = array_map('PrivateBin\Data\Database::_sanitizeClob', $row); |
| 514 | } |
| 515 | } else { |
| 516 | $result = $statement->fetchAll(PDO::FETCH_ASSOC); |
| 517 | } |
| 518 | $statement->closeCursor(); |
| 519 | return $result; |
| 520 | } |
| 521 | |
| 522 | /** |
| 523 | * get table list query, depending on the database type |
| 524 | * |
| 525 | * @access private |
| 526 | * @param string $type |
| 527 | * @throws Exception |
| 528 | * @return string |
| 529 | */ |
| 530 | private function _getTableQuery($type) |
| 531 | { |
| 532 | switch ($type) { |
| 533 | case 'ibm': |
| 534 | $sql = 'SELECT "tabname" FROM "SYSCAT"."TABLES"'; |
| 535 | break; |
| 536 | case 'informix': |
| 537 | $sql = 'SELECT "tabname" FROM "systables"'; |
| 538 | break; |
| 539 | case 'mssql': |
| 540 | // U: tables created by the user |
| 541 | $sql = 'SELECT "name" FROM "sysobjects" ' |
| 542 | . 'WHERE "type" = \'U\' ORDER BY "name"'; |
| 543 | break; |
| 544 | case 'mysql': |
| 545 | $sql = 'SHOW TABLES'; |
| 546 | break; |
| 547 | case 'oci': |
| 548 | $sql = 'SELECT table_name FROM all_tables'; |
| 549 | break; |
| 550 | case 'pgsql': |
| 551 | $sql = 'SELECT "tablename" FROM "pg_catalog"."pg_tables" ' |
| 552 | . 'WHERE "schemaname" NOT IN (\'pg_catalog\', \'information_schema\')'; |
| 553 | break; |
| 554 | case 'sqlite': |
| 555 | $sql = 'SELECT "name" FROM "sqlite_master" WHERE "type"=\'table\' ' |
| 556 | . 'UNION ALL SELECT "name" FROM "sqlite_temp_master" ' |
| 557 | . 'WHERE "type"=\'table\' ORDER BY "name"'; |
| 558 | break; |
| 559 | default: |
| 560 | throw new Exception( |
| 561 | "PDO type $type is currently not supported.", 5 |
| 562 | ); |
| 563 | } |
| 564 | return $sql; |
| 565 | } |
| 566 | |
| 567 | /** |
| 568 | * get a value by key from the config table |
| 569 | * |
| 570 | * @access private |
| 571 | * @param string $key |
| 572 | * @return string |
| 573 | */ |
| 574 | private function _getConfig($key) |
| 575 | { |
| 576 | try { |
| 577 | $row = $this->_select( |
| 578 | 'SELECT "value" FROM "' . $this->_sanitizeIdentifier('config') . |
| 579 | '" WHERE "id" = ?', array($key), true |
| 580 | ); |
| 581 | } catch (PDOException $e) { |
| 582 | error_log('Error while attempting to fetch configuration key "' . $key . '" in the database: ' . $e->getMessage()); |
| 583 | return ''; |
| 584 | } |
| 585 | return $row ? $row['value'] : ''; |
| 586 | } |
| 587 | |
| 588 | /** |
| 589 | * get the primary key clauses, depending on the database driver |
| 590 | * |
| 591 | * @access private |
| 592 | * @param string $key |
| 593 | * @return array |
| 594 | */ |
| 595 | private function _getPrimaryKeyClauses($key = 'dataid') |
| 596 | { |
| 597 | $main_key = $after_key = ''; |
| 598 | switch ($this->_type) { |
| 599 | case 'mysql': |
| 600 | case 'oci': |
| 601 | $after_key = ", PRIMARY KEY (\"$key\")"; |
| 602 | break; |
| 603 | default: |
| 604 | $main_key = ' PRIMARY KEY'; |
| 605 | break; |
| 606 | } |
| 607 | return array($main_key, $after_key); |
| 608 | } |
| 609 | |
| 610 | /** |
| 611 | * get the data type, depending on the database driver |
| 612 | * |
| 613 | * PostgreSQL and OCI uses a different API for BLOBs then SQL, hence we use TEXT and CLOB |
| 614 | * |
| 615 | * @access private |
| 616 | * @return string |
| 617 | */ |
| 618 | private function _getDataType() |
| 619 | { |
| 620 | switch ($this->_type) { |
| 621 | case 'oci': |
| 622 | return 'CLOB'; |
| 623 | case 'pgsql': |
| 624 | return 'TEXT'; |
| 625 | default: |
| 626 | return 'BLOB'; |
| 627 | } |
| 628 | } |
| 629 | |
| 630 | /** |
| 631 | * get the attachment type, depending on the database driver |
| 632 | * |
| 633 | * PostgreSQL and OCI use different APIs for BLOBs then SQL, hence we use TEXT and CLOB |
| 634 | * |
| 635 | * @access private |
| 636 | * @return string |
| 637 | */ |
| 638 | private function _getAttachmentType() |
| 639 | { |
| 640 | switch ($this->_type) { |
| 641 | case 'oci': |
| 642 | return 'CLOB'; |
| 643 | case 'pgsql': |
| 644 | return 'TEXT'; |
| 645 | default: |
| 646 | return 'MEDIUMBLOB'; |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | /** |
| 651 | * get the meta type, depending on the database driver |
| 652 | * |
| 653 | * OCI doesn't accept TEXT so it has to be VARCHAR2(4000) |
| 654 | * |
| 655 | * @access private |
| 656 | * @return string |
| 657 | */ |
| 658 | private function _getMetaType() |
| 659 | { |
| 660 | switch ($this->_type) { |
| 661 | case 'oci': |
| 662 | return 'VARCHAR2(4000)'; |
| 663 | default: |
| 664 | return 'TEXT'; |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | /** |
| 669 | * create the paste table |
| 670 | * |
| 671 | * @access private |
| 672 | */ |
| 673 | private function _createPasteTable() |
| 674 | { |
| 675 | list($main_key, $after_key) = $this->_getPrimaryKeyClauses(); |
| 676 | $attachmentType = $this->_getAttachmentType(); |
| 677 | $metaType = $this->_getMetaType(); |
| 678 | $this->_db->exec( |
| 679 | 'CREATE TABLE "' . $this->_sanitizeIdentifier('paste') . '" ( ' . |
| 680 | "\"dataid\" CHAR(16) NOT NULL$main_key, " . |
| 681 | "\"data\" $attachmentType, " . |
| 682 | '"expiredate" INT, ' . |
| 683 | "\"meta\" $metaType$after_key )" |
| 684 | ); |
| 685 | } |
| 686 | |
| 687 | /** |
| 688 | * create the comment table |
| 689 | * |
| 690 | * @access private |
| 691 | */ |
| 692 | private function _createCommentTable() |
| 693 | { |
| 694 | list($main_key, $after_key) = $this->_getPrimaryKeyClauses(); |
| 695 | $dataType = $this->_getDataType(); |
| 696 | $this->_db->exec( |
| 697 | 'CREATE TABLE "' . $this->_sanitizeIdentifier('comment') . '" ( ' . |
| 698 | "\"dataid\" CHAR(16) NOT NULL$main_key, " . |
| 699 | '"pasteid" CHAR(16), ' . |
| 700 | '"parentid" CHAR(16), ' . |
| 701 | "\"data\" $dataType, " . |
| 702 | "\"vizhash\" $dataType, " . |
| 703 | "\"postdate\" INT$after_key )" |
| 704 | ); |
| 705 | if ($this->_type === 'oci') { |
| 706 | $this->_db->exec( |
| 707 | 'declare |
| 708 | already_exists exception; |
| 709 | columns_indexed exception; |
| 710 | pragma exception_init( already_exists, -955 ); |
| 711 | pragma exception_init(columns_indexed, -1408); |
| 712 | begin |
| 713 | execute immediate \'create index "comment_parent" on "' . $this->_sanitizeIdentifier('comment') . '" ("pasteid")\'; |
| 714 | exception |
| 715 | when already_exists or columns_indexed then |
| 716 | NULL; |
| 717 | end;' |
| 718 | ); |
| 719 | } else { |
| 720 | // CREATE INDEX IF NOT EXISTS not supported as of Oracle MySQL <= 8.0 |
| 721 | $this->_db->exec( |
| 722 | 'CREATE INDEX "' . |
| 723 | $this->_sanitizeIdentifier('comment_parent') . '" ON "' . |
| 724 | $this->_sanitizeIdentifier('comment') . '" ("pasteid")' |
| 725 | ); |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * create the config table |
| 731 | * |
| 732 | * @access private |
| 733 | */ |
| 734 | private function _createConfigTable() |
| 735 | { |
| 736 | list($main_key, $after_key) = $this->_getPrimaryKeyClauses('id'); |
| 737 | $charType = $this->_type === 'oci' ? 'VARCHAR2(16)' : 'CHAR(16)'; |
| 738 | $textType = $this->_getMetaType(); |
| 739 | $this->_db->exec( |
| 740 | 'CREATE TABLE "' . $this->_sanitizeIdentifier('config') . |
| 741 | "\" ( \"id\" $charType NOT NULL$main_key, \"value\" $textType$after_key )" |
| 742 | ); |
| 743 | $this->_exec( |
| 744 | 'INSERT INTO "' . $this->_sanitizeIdentifier('config') . |
| 745 | '" VALUES(?,?)', |
| 746 | array('VERSION', Controller::VERSION) |
| 747 | ); |
| 748 | } |
| 749 | |
| 750 | /** |
| 751 | * sanitizes CLOB values used with OCI |
| 752 | * |
| 753 | * From: https://stackoverflow.com/questions/36200534/pdo-oci-into-a-clob-field |
| 754 | * |
| 755 | * @access public |
| 756 | * @static |
| 757 | * @param int|string|resource $value |
| 758 | * @return int|string |
| 759 | */ |
| 760 | public static function _sanitizeClob($value) |
| 761 | { |
| 762 | if (is_resource($value)) { |
| 763 | $value = stream_get_contents($value); |
| 764 | } |
| 765 | return $value; |
| 766 | } |
| 767 | |
| 768 | /** |
| 769 | * sanitizes identifiers |
| 770 | * |
| 771 | * @access private |
| 772 | * @param string $identifier |
| 773 | * @return string |
| 774 | */ |
| 775 | private function _sanitizeIdentifier($identifier) |
| 776 | { |
| 777 | return preg_replace('/[^A-Za-z0-9_]+/', '', $this->_prefix . $identifier); |
| 778 | } |
| 779 | |
| 780 | /** |
| 781 | * check if the current database type supports dropping columns |
| 782 | * |
| 783 | * @access private |
| 784 | * @return bool |
| 785 | */ |
| 786 | private function _supportsDropColumn() |
| 787 | { |
| 788 | $supportsDropColumn = true; |
| 789 | if ($this->_type === 'sqlite') { |
| 790 | try { |
| 791 | $row = $this->_select('SELECT sqlite_version() AS "v"', array(), true); |
| 792 | $supportsDropColumn = (bool) version_compare($row['v'], '3.35.0', '>='); |
| 793 | } catch (PDOException $e) { |
| 794 | $supportsDropColumn = false; |
| 795 | } |
| 796 | } |
| 797 | return $supportsDropColumn; |
| 798 | } |
| 799 | |
| 800 | /** |
| 801 | * upgrade the database schema from an old version |
| 802 | * |
| 803 | * @access private |
| 804 | * @param string $oldversion |
| 805 | */ |
| 806 | private function _upgradeDatabase($oldversion) |
| 807 | { |
| 808 | $dataType = $this->_getDataType(); |
| 809 | $attachmentType = $this->_getAttachmentType(); |
| 810 | if (version_compare($oldversion, '0.21', '<=')) { |
| 811 | // create the meta column if necessary (pre 0.21 change) |
| 812 | try { |
| 813 | $this->_db->exec( |
| 814 | 'SELECT "meta" FROM "' . $this->_sanitizeIdentifier('paste') . '" ' . |
| 815 | ($this->_type === 'oci' ? 'FETCH NEXT 1 ROWS ONLY' : 'LIMIT 1') |
| 816 | ); |
| 817 | } catch (PDOException $e) { |
| 818 | $this->_db->exec('ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . '" ADD COLUMN "meta" TEXT'); |
| 819 | } |
| 820 | // SQLite only allows one ALTER statement at a time... |
| 821 | $this->_db->exec( |
| 822 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . |
| 823 | "\" ADD COLUMN \"attachment\" $attachmentType" |
| 824 | ); |
| 825 | $this->_db->exec( |
| 826 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . "\" ADD COLUMN \"attachmentname\" $dataType" |
| 827 | ); |
| 828 | // SQLite doesn't support MODIFY, but it allows TEXT of similar |
| 829 | // size as BLOB, so there is no need to change it there |
| 830 | if ($this->_type !== 'sqlite') { |
| 831 | $this->_db->exec( |
| 832 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . |
| 833 | "\" ADD PRIMARY KEY (\"dataid\"), MODIFY COLUMN \"data\" $dataType" |
| 834 | ); |
| 835 | $this->_db->exec( |
| 836 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('comment') . |
| 837 | "\" ADD PRIMARY KEY (\"dataid\"), MODIFY COLUMN \"data\" $dataType, " . |
| 838 | "MODIFY COLUMN \"nickname\" $dataType, MODIFY COLUMN \"vizhash\" $dataType" |
| 839 | ); |
| 840 | } else { |
| 841 | $this->_db->exec( |
| 842 | 'CREATE UNIQUE INDEX IF NOT EXISTS "' . |
| 843 | $this->_sanitizeIdentifier('paste_dataid') . '" ON "' . |
| 844 | $this->_sanitizeIdentifier('paste') . '" ("dataid")' |
| 845 | ); |
| 846 | $this->_db->exec( |
| 847 | 'CREATE UNIQUE INDEX IF NOT EXISTS "' . |
| 848 | $this->_sanitizeIdentifier('comment_dataid') . '" ON "' . |
| 849 | $this->_sanitizeIdentifier('comment') . '" ("dataid")' |
| 850 | ); |
| 851 | } |
| 852 | // CREATE INDEX IF NOT EXISTS not supported as of Oracle MySQL <= 8.0 |
| 853 | $this->_db->exec( |
| 854 | 'CREATE INDEX "' . |
| 855 | $this->_sanitizeIdentifier('comment_parent') . '" ON "' . |
| 856 | $this->_sanitizeIdentifier('comment') . '" ("pasteid")' |
| 857 | ); |
| 858 | } |
| 859 | if (version_compare($oldversion, '1.3', '<=')) { |
| 860 | // SQLite doesn't support MODIFY, but it allows TEXT of similar |
| 861 | // size as BLOB and PostgreSQL uses TEXT, so there is no need |
| 862 | // to change it there |
| 863 | if ($this->_type !== 'sqlite' && $this->_type !== 'pgsql') { |
| 864 | $this->_db->exec( |
| 865 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . |
| 866 | "\" MODIFY COLUMN \"data\" $attachmentType" |
| 867 | ); |
| 868 | } |
| 869 | } |
| 870 | if (version_compare($oldversion, '1.7.1', '<=')) { |
| 871 | if ($this->_supportsDropColumn()) { |
| 872 | $this->_db->exec( |
| 873 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . |
| 874 | '" DROP COLUMN "postdate"' |
| 875 | ); |
| 876 | } |
| 877 | } |
| 878 | if (version_compare($oldversion, '1.7.8', '<=')) { |
| 879 | if ($this->_supportsDropColumn()) { |
| 880 | $this->_db->exec( |
| 881 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . |
| 882 | '" DROP COLUMN "opendiscussion"' |
| 883 | ); |
| 884 | $this->_db->exec( |
| 885 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . |
| 886 | '" DROP COLUMN "burnafterreading"' |
| 887 | ); |
| 888 | $this->_db->exec( |
| 889 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . |
| 890 | '" DROP COLUMN "attachment"' |
| 891 | ); |
| 892 | $this->_db->exec( |
| 893 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('paste') . |
| 894 | '" DROP COLUMN "attachmentname"' |
| 895 | ); |
| 896 | $this->_db->exec( |
| 897 | 'ALTER TABLE "' . $this->_sanitizeIdentifier('comment') . |
| 898 | '" DROP COLUMN "nickname"' |
| 899 | ); |
| 900 | } |
| 901 | } |
| 902 | $this->_exec( |
| 903 | 'UPDATE "' . $this->_sanitizeIdentifier('config') . |
| 904 | '" SET "value" = ? WHERE "id" = ?', |
| 905 | array(Controller::VERSION, 'VERSION') |
| 906 | ); |
| 907 | } |
| 908 | } |