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Diffstat (limited to 'program/lib/Roundcube/rcube_db.php')
| -rw-r--r-- | program/lib/Roundcube/rcube_db.php | 1009 |
1 files changed, 1009 insertions, 0 deletions
diff --git a/program/lib/Roundcube/rcube_db.php b/program/lib/Roundcube/rcube_db.php new file mode 100644 index 000000000..5d8c4a534 --- /dev/null +++ b/program/lib/Roundcube/rcube_db.php @@ -0,0 +1,1009 @@ +<?php + +/** + +-----------------------------------------------------------------------+ + | program/include/rcube_db.php | + | | + | This file is part of the Roundcube Webmail client | + | Copyright (C) 2005-2012, The Roundcube Dev Team | + | | + | Licensed under the GNU General Public License version 3 or | + | any later version with exceptions for skins & plugins. | + | See the README file for a full license statement. | + | | + | PURPOSE: | + | Database wrapper class that implements PHP PDO functions | + | | + +-----------------------------------------------------------------------+ + | Author: Aleksander Machniak <alec@alec.pl> | + +-----------------------------------------------------------------------+ +*/ + + +/** + * Database independent query interface. + * This is a wrapper for the PHP PDO. + * + * @package Framework + * @sbpackage Database + */ +class rcube_db +{ + public $db_provider; + + protected $db_dsnw; // DSN for write operations + protected $db_dsnr; // DSN for read operations + protected $db_connected = false; // Already connected ? + protected $db_mode; // Connection mode + protected $dbh; // Connection handle + + protected $db_error = false; + protected $db_error_msg = ''; + protected $conn_failure = false; + protected $a_query_results = array('dummy'); + protected $last_res_id = 0; + protected $db_index = 0; + protected $tables; + protected $variables; + + protected $options = array( + // column/table quotes + 'identifier_start' => '"', + 'identifier_end' => '"', + ); + + + /** + * Factory, returns driver-specific instance of the class + * + * @param string $db_dsnw DSN for read/write operations + * @param string $db_dsnr Optional DSN for read only operations + * @param bool $pconn Enables persistent connections + * + * @return rcube_db Object instance + */ + public static function factory($db_dsnw, $db_dsnr = '', $pconn = false) + { + $driver = strtolower(substr($db_dsnw, 0, strpos($db_dsnw, ':'))); + $driver_map = array( + 'sqlite2' => 'sqlite', + 'sybase' => 'mssql', + 'dblib' => 'mssql', + 'mysqli' => 'mysql', + ); + + $driver = isset($driver_map[$driver]) ? $driver_map[$driver] : $driver; + $class = "rcube_db_$driver"; + + if (!class_exists($class)) { + rcube::raise_error(array('code' => 600, 'type' => 'db', + 'line' => __LINE__, 'file' => __FILE__, + 'message' => "Configuration error. Unsupported database driver: $driver"), + true, true); + } + + return new $class($db_dsnw, $db_dsnr, $pconn); + } + + /** + * Object constructor + * + * @param string $db_dsnw DSN for read/write operations + * @param string $db_dsnr Optional DSN for read only operations + * @param bool $pconn Enables persistent connections + */ + public function __construct($db_dsnw, $db_dsnr = '', $pconn = false) + { + if (empty($db_dsnr)) { + $db_dsnr = $db_dsnw; + } + + $this->db_dsnw = $db_dsnw; + $this->db_dsnr = $db_dsnr; + $this->db_pconn = $pconn; + + $this->db_dsnw_array = self::parse_dsn($db_dsnw); + $this->db_dsnr_array = self::parse_dsn($db_dsnr); + + // Initialize driver class + $this->init(); + } + + /** + * Initialization of the object with driver specific code + */ + protected function init() + { + // To be used by driver classes + } + + /** + * Connect to specific database + * + * @param array $dsn DSN for DB connections + * + * @return PDO database handle + */ + protected function dsn_connect($dsn) + { + $this->db_error = false; + $this->db_error_msg = null; + + // Get database specific connection options + $dsn_string = $this->dsn_string($dsn); + $dsn_options = $this->dsn_options($dsn); + + if ($db_pconn) { + $dsn_options[PDO::ATTR_PERSISTENT] = true; + } + + // Connect + try { + // with this check we skip fatal error on PDO object creation + if (!class_exists('PDO', false)) { + throw new Exception('PDO extension not loaded. See http://php.net/manual/en/intro.pdo.php'); + } + + $this->conn_prepare($dsn); + + $dbh = new PDO($dsn_string, $dsn['username'], $dsn['password'], $dsn_options); + + // don't throw exceptions or warnings + $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT); + } + catch (Exception $e) { + $this->db_error = true; + $this->db_error_msg = $e->getMessage(); + + rcube::raise_error(array('code' => 500, 'type' => 'db', + 'line' => __LINE__, 'file' => __FILE__, + 'message' => $this->db_error_msg), true, false); + + return null; + } + + $this->conn_configure($dsn, $dbh); + + return $dbh; + } + + /** + * Driver-specific preparation of database connection + * + * @param array $dsn DSN for DB connections + */ + protected function conn_prepare($dsn) + { + } + + /** + * Driver-specific configuration of database connection + * + * @param array $dsn DSN for DB connections + * @param PDO $dbh Connection handler + */ + protected function conn_configure($dsn, $dbh) + { + } + + /** + * Driver-specific database character set setting + * + * @param string $charset Character set name + */ + protected function set_charset($charset) + { + $this->query("SET NAMES 'utf8'"); + } + + /** + * Connect to appropriate database depending on the operation + * + * @param string $mode Connection mode (r|w) + */ + public function db_connect($mode) + { + // previous connection failed, don't attempt to connect again + if ($this->conn_failure) { + return; + } + + // no replication + if ($this->db_dsnw == $this->db_dsnr) { + $mode = 'w'; + } + + // Already connected + if ($this->db_connected) { + // connected to db with the same or "higher" mode + if ($this->db_mode == 'w' || $this->db_mode == $mode) { + return; + } + } + + $dsn = ($mode == 'r') ? $this->db_dsnr_array : $this->db_dsnw_array; + + $this->dbh = $this->dsn_connect($dsn); + $this->db_connected = is_object($this->dbh); + + // use write-master when read-only fails + if (!$this->db_connected && $mode == 'r') { + $mode = 'w'; + $this->dbh = $this->dsn_connect($this->db_dsnw_array); + $this->db_connected = is_object($this->dbh); + } + + if ($this->db_connected) { + $this->db_mode = $mode; + $this->set_charset('utf8'); + } + else { + $this->conn_failure = true; + } + } + + /** + * Activate/deactivate debug mode + * + * @param boolean $dbg True if SQL queries should be logged + */ + public function set_debug($dbg = true) + { + $this->options['debug_mode'] = $dbg; + } + + /** + * Writes debug information/query to 'sql' log file + * + * @param string $query SQL query + */ + protected function debug($query) + { + if ($this->options['debug_mode']) { + rcube::write_log('sql', '[' . (++$this->db_index) . '] ' . $query . ';'); + } + } + + /** + * Getter for error state + * + * @param int $res_id Optional query result identifier + * + * @return string Error message + */ + public function is_error($res_id = null) + { + if ($res_id !== null) { + return $this->_get_result($res_id) === false ? $this->db_error_msg : null; + } + + return $this->db_error ? $this->db_error_msg : null; + } + + /** + * Connection state checker + * + * @return boolean True if in connected state + */ + public function is_connected() + { + return !is_object($this->dbh) ? false : $this->db_connected; + } + + /** + * Is database replication configured? + * + * @return bool Returns true if dsnw != dsnr + */ + public function is_replicated() + { + return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr; + } + + /** + * Get database runtime variables + * + * @param string $varname Variable name + * @param mixed $default Default value if variable is not set + * + * @return mixed Variable value or default + */ + public function get_variable($varname, $default = null) + { + // to be implemented by driver class + return $default; + } + + /** + * Execute a SQL query + * + * @param string SQL query to execute + * @param mixed Values to be inserted in query + * + * @return number Query handle identifier + */ + public function query() + { + $params = func_get_args(); + $query = array_shift($params); + + // Support one argument of type array, instead of n arguments + if (count($params) == 1 && is_array($params[0])) { + $params = $params[0]; + } + + return $this->_query($query, 0, 0, $params); + } + + /** + * Execute a SQL query with limits + * + * @param string SQL query to execute + * @param int Offset for LIMIT statement + * @param int Number of rows for LIMIT statement + * @param mixed Values to be inserted in query + * + * @return int Query handle identifier + */ + public function limitquery() + { + $params = func_get_args(); + $query = array_shift($params); + $offset = array_shift($params); + $numrows = array_shift($params); + + return $this->_query($query, $offset, $numrows, $params); + } + + /** + * Execute a SQL query with limits + * + * @param string $query SQL query to execute + * @param int $offset Offset for LIMIT statement + * @param int $numrows Number of rows for LIMIT statement + * @param array $params Values to be inserted in query + * + * @return int Query handle identifier + */ + protected function _query($query, $offset, $numrows, $params) + { + // Read or write ? + $mode = preg_match('/^(select|show)/i', ltrim($query)) ? 'r' : 'w'; + + $this->db_connect($mode); + + // check connection before proceeding + if (!$this->is_connected()) { + return null; + } + + if ($numrows || $offset) { + $query = $this->set_limit($query, $numrows, $offset); + } + + $params = (array) $params; + + // Because in Roundcube we mostly use queries that are + // executed only once, we will not use prepared queries + $pos = 0; + $idx = 0; + + while ($pos = strpos($query, '?', $pos)) { + if ($query[$pos+1] == '?') { // skip escaped ? + $pos += 2; + } + else { + $val = $this->quote($params[$idx++]); + unset($params[$idx-1]); + $query = substr_replace($query, $val, $pos, 1); + $pos += strlen($val); + } + } + + // replace escaped ? back to normal + $query = rtrim(strtr($query, array('??' => '?')), ';'); + + $this->debug($query); + + $query = $this->dbh->query($query); + + if ($query === false) { + $error = $this->dbh->errorInfo(); + $this->db_error = true; + $this->db_error_msg = sprintf('[%s] %s', $error[1], $error[2]); + + rcube::raise_error(array('code' => 500, 'type' => 'db', + 'line' => __LINE__, 'file' => __FILE__, + 'message' => $this->db_error_msg), true, false); + } + + // add result, even if it's an error + return $this->_add_result($query); + } + + /** + * Get number of affected rows for the last query + * + * @param number $res_id Optional query handle identifier + * + * @return int Number of rows or false on failure + */ + public function affected_rows($res_id = null) + { + if ($result = $this->_get_result($res_id)) { + return $result->rowCount(); + } + + return 0; + } + + /** + * Get last inserted record ID + * + * @param string $table Table name (to find the incremented sequence) + * + * @return mixed ID or false on failure + */ + public function insert_id($table = '') + { + if (!$this->db_connected || $this->db_mode == 'r') { + return false; + } + + if ($table) { + // resolve table name + $table = $this->table_name($table); + } + + $id = $this->dbh->lastInsertId($table); + + return $id; + } + + /** + * Get an associative array for one row + * If no query handle is specified, the last query will be taken as reference + * + * @param int $res_id Optional query handle identifier + * + * @return mixed Array with col values or false on failure + */ + public function fetch_assoc($res_id = null) + { + $result = $this->_get_result($res_id); + return $this->_fetch_row($result, PDO::FETCH_ASSOC); + } + + /** + * Get an index array for one row + * If no query handle is specified, the last query will be taken as reference + * + * @param int $res_id Optional query handle identifier + * + * @return mixed Array with col values or false on failure + */ + public function fetch_array($res_id = null) + { + $result = $this->_get_result($res_id); + return $this->_fetch_row($result, PDO::FETCH_NUM); + } + + /** + * Get col values for a result row + * + * @param PDOStatement $result Result handle + * @param int $mode Fetch mode identifier + * + * @return mixed Array with col values or false on failure + */ + protected function _fetch_row($result, $mode) + { + if (!is_object($result) || !$this->is_connected()) { + return false; + } + + return $result->fetch($mode); + } + + /** + * Adds LIMIT,OFFSET clauses to the query + * + * @param string $query SQL query + * @param int $limit Number of rows + * @param int $offset Offset + * + * @return string SQL query + */ + protected function set_limit($query, $limit = 0, $offset = 0) + { + if ($limit) { + $query .= ' LIMIT ' . intval($limit); + } + + if ($offset) { + $query .= ' OFFSET ' . intval($offset); + } + + return $query; + } + + /** + * Returns list of tables in a database + * + * @return array List of all tables of the current database + */ + public function list_tables() + { + // get tables if not cached + if ($this->tables === null) { + $q = $this->query('SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES ORDER BY TABLE_NAME'); + + if ($res = $this->_get_result($q)) { + $this->tables = $res->fetchAll(PDO::FETCH_COLUMN, 0); + } + else { + $this->tables = array(); + } + } + + return $this->tables; + } + + /** + * Returns list of columns in database table + * + * @param string $table Table name + * + * @return array List of table cols + */ + public function list_cols($table) + { + $q = $this->query('SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ?', + array($table)); + + if ($res = $this->_get_result($q)) { + return $res->fetchAll(PDO::FETCH_COLUMN, 0); + } + + return array(); + } + + /** + * Formats input so it can be safely used in a query + * + * @param mixed $input Value to quote + * @param string $type Type of data + * + * @return string Quoted/converted string for use in query + */ + public function quote($input, $type = null) + { + // handle int directly for better performance + if ($type == 'integer' || $type == 'int') { + return intval($input); + } + + if (is_null($input)) { + return 'NULL'; + } + + // create DB handle if not available + if (!$this->dbh) { + $this->db_connect('r'); + } + + if ($this->dbh) { + $map = array( + 'bool' => PDO::PARAM_BOOL, + 'integer' => PDO::PARAM_INT, + ); + $type = isset($map[$type]) ? $map[$type] : PDO::PARAM_STR; + return strtr($this->dbh->quote($input, $type), array('?' => '??')); // escape ? + } + + return 'NULL'; + } + + /** + * Quotes a string so it can be safely used as a table or column name + * + * @param string $str Value to quote + * + * @return string Quoted string for use in query + * @deprecated Replaced by rcube_db::quote_identifier + * @see rcube_db::quote_identifier + */ + public function quoteIdentifier($str) + { + return $this->quote_identifier($str); + } + + /** + * Quotes a string so it can be safely used as a table or column name + * + * @param string $str Value to quote + * + * @return string Quoted string for use in query + */ + public function quote_identifier($str) + { + $start = $this->options['identifier_start']; + $end = $this->options['identifier_end']; + $name = array(); + + foreach (explode('.', $str) as $elem) { + $elem = str_replace(array($start, $end), '', $elem); + $name[] = $start . $elem . $end; + } + + return implode($name, '.'); + } + + /** + * Return SQL function for current time and date + * + * @return string SQL function to use in query + */ + public function now() + { + return "now()"; + } + + /** + * Return list of elements for use with SQL's IN clause + * + * @param array $arr Input array + * @param string $type Type of data + * + * @return string Comma-separated list of quoted values for use in query + */ + public function array2list($arr, $type = null) + { + if (!is_array($arr)) { + return $this->quote($arr, $type); + } + + foreach ($arr as $idx => $item) { + $arr[$idx] = $this->quote($item, $type); + } + + return implode(',', $arr); + } + + /** + * Return SQL statement to convert a field value into a unix timestamp + * + * This method is deprecated and should not be used anymore due to limitations + * of timestamp functions in Mysql (year 2038 problem) + * + * @param string $field Field name + * + * @return string SQL statement to use in query + * @deprecated + */ + public function unixtimestamp($field) + { + return "UNIX_TIMESTAMP($field)"; + } + + /** + * Return SQL statement to convert from a unix timestamp + * + * @param int $timestamp Unix timestamp + * + * @return string Date string in db-specific format + */ + public function fromunixtime($timestamp) + { + return date("'Y-m-d H:i:s'", $timestamp); + } + + /** + * Return SQL statement for case insensitive LIKE + * + * @param string $column Field name + * @param string $value Search value + * + * @return string SQL statement to use in query + */ + public function ilike($column, $value) + { + return $this->quote_identifier($column).' LIKE '.$this->quote($value); + } + + /** + * Abstract SQL statement for value concatenation + * + * @return string SQL statement to be used in query + */ + public function concat(/* col1, col2, ... */) + { + $args = func_get_args(); + if (is_array($args[0])) { + $args = $args[0]; + } + + return '(' . join(' || ', $args) . ')'; + } + + /** + * Encodes non-UTF-8 characters in string/array/object (recursive) + * + * @param mixed $input Data to fix + * + * @return mixed Properly UTF-8 encoded data + */ + public static function encode($input) + { + if (is_object($input)) { + foreach (get_object_vars($input) as $idx => $value) { + $input->$idx = self::encode($value); + } + return $input; + } + else if (is_array($input)) { + foreach ($input as $idx => $value) { + $input[$idx] = self::encode($value); + } + return $input; + } + + return utf8_encode($input); + } + + /** + * Decodes encoded UTF-8 string/object/array (recursive) + * + * @param mixed $input Input data + * + * @return mixed Decoded data + */ + public static function decode($input) + { + if (is_object($input)) { + foreach (get_object_vars($input) as $idx => $value) { + $input->$idx = self::decode($value); + } + return $input; + } + else if (is_array($input)) { + foreach ($input as $idx => $value) { + $input[$idx] = self::decode($value); + } + return $input; + } + + return utf8_decode($input); + } + + /** + * Adds a query result and returns a handle ID + * + * @param object $res Query handle + * + * @return int Handle ID + */ + protected function _add_result($res) + { + $this->last_res_id = sizeof($this->a_query_results); + $this->a_query_results[$this->last_res_id] = $res; + + return $this->last_res_id; + } + + /** + * Resolves a given handle ID and returns the according query handle + * If no ID is specified, the last resource handle will be returned + * + * @param int $res_id Handle ID + * + * @return mixed Resource handle or false on failure + */ + protected function _get_result($res_id = null) + { + if ($res_id == null) { + $res_id = $this->last_res_id; + } + + if (!empty($this->a_query_results[$res_id])) { + return $this->a_query_results[$res_id]; + } + + return false; + } + + /** + * Return correct name for a specific database table + * + * @param string $table Table name + * + * @return string Translated table name + */ + public function table_name($table) + { + $rcube = rcube::get_instance(); + + // return table name if configured + $config_key = 'db_table_'.$table; + + if ($name = $rcube->config->get($config_key)) { + return $name; + } + + return $table; + } + + /** + * MDB2 DSN string parser + * + * @param string $sequence Secuence name + * + * @return array DSN parameters + */ + public static function parse_dsn($dsn) + { + if (empty($dsn)) { + return null; + } + + // Find phptype and dbsyntax + if (($pos = strpos($dsn, '://')) !== false) { + $str = substr($dsn, 0, $pos); + $dsn = substr($dsn, $pos + 3); + } + else { + $str = $dsn; + $dsn = null; + } + + // Get phptype and dbsyntax + // $str => phptype(dbsyntax) + if (preg_match('|^(.+?)\((.*?)\)$|', $str, $arr)) { + $parsed['phptype'] = $arr[1]; + $parsed['dbsyntax'] = !$arr[2] ? $arr[1] : $arr[2]; + } + else { + $parsed['phptype'] = $str; + $parsed['dbsyntax'] = $str; + } + + if (empty($dsn)) { + return $parsed; + } + + // Get (if found): username and password + // $dsn => username:password@protocol+hostspec/database + if (($at = strrpos($dsn,'@')) !== false) { + $str = substr($dsn, 0, $at); + $dsn = substr($dsn, $at + 1); + if (($pos = strpos($str, ':')) !== false) { + $parsed['username'] = rawurldecode(substr($str, 0, $pos)); + $parsed['password'] = rawurldecode(substr($str, $pos + 1)); + } + else { + $parsed['username'] = rawurldecode($str); + } + } + + // Find protocol and hostspec + + // $dsn => proto(proto_opts)/database + if (preg_match('|^([^(]+)\((.*?)\)/?(.*?)$|', $dsn, $match)) { + $proto = $match[1]; + $proto_opts = $match[2] ? $match[2] : false; + $dsn = $match[3]; + } + // $dsn => protocol+hostspec/database (old format) + else { + if (strpos($dsn, '+') !== false) { + list($proto, $dsn) = explode('+', $dsn, 2); + } + if ( strpos($dsn, '//') === 0 + && strpos($dsn, '/', 2) !== false + && $parsed['phptype'] == 'oci8' + ) { + //oracle's "Easy Connect" syntax: + //"username/password@[//]host[:port][/service_name]" + //e.g. "scott/tiger@//mymachine:1521/oracle" + $proto_opts = $dsn; + $pos = strrpos($proto_opts, '/'); + $dsn = substr($proto_opts, $pos + 1); + $proto_opts = substr($proto_opts, 0, $pos); + } + else if (strpos($dsn, '/') !== false) { + list($proto_opts, $dsn) = explode('/', $dsn, 2); + } + else { + $proto_opts = $dsn; + $dsn = null; + } + } + + // process the different protocol options + $parsed['protocol'] = (!empty($proto)) ? $proto : 'tcp'; + $proto_opts = rawurldecode($proto_opts); + if (strpos($proto_opts, ':') !== false) { + list($proto_opts, $parsed['port']) = explode(':', $proto_opts); + } + if ($parsed['protocol'] == 'tcp') { + $parsed['hostspec'] = $proto_opts; + } + else if ($parsed['protocol'] == 'unix') { + $parsed['socket'] = $proto_opts; + } + + // Get dabase if any + // $dsn => database + if ($dsn) { + // /database + if (($pos = strpos($dsn, '?')) === false) { + $parsed['database'] = rawurldecode($dsn); + // /database?param1=value1¶m2=value2 + } + else { + $parsed['database'] = rawurldecode(substr($dsn, 0, $pos)); + $dsn = substr($dsn, $pos + 1); + if (strpos($dsn, '&') !== false) { + $opts = explode('&', $dsn); + } + else { // database?param1=value1 + $opts = array($dsn); + } + foreach ($opts as $opt) { + list($key, $value) = explode('=', $opt); + if (!array_key_exists($key, $parsed) || false === $parsed[$key]) { + // don't allow params overwrite + $parsed[$key] = rawurldecode($value); + } + } + } + } + + return $parsed; + } + + /** + * Returns PDO DSN string from DSN array + * + * @param array $dsn DSN parameters + * + * @return string DSN string + */ + protected function dsn_string($dsn) + { + $params = array(); + $result = $dsn['phptype'] . ':'; + + if ($dsn['hostspec']) { + $params[] = 'host=' . $dsn['hostspec']; + } + + if ($dsn['port']) { + $params[] = 'port=' . $dsn['port']; + } + + if ($dsn['database']) { + $params[] = 'dbname=' . $dsn['database']; + } + + if (!empty($params)) { + $result .= implode(';', $params); + } + + return $result; + } + + /** + * Returns driver-specific connection options + * + * @param array $dsn DSN parameters + * + * @return array Connection options + */ + protected function dsn_options($dsn) + { + $result = array(); + + return $result; + } +} |