From d61d668b64c44fc046095b807834c4836a8c05c5 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Wed, 08 Apr 2015 02:57:21 -0400
Subject: [PATCH] Remove useless code
---
program/lib/Roundcube/rcube_db.php | 392 ++++++++++++++++++++++++++++++++++++++++++++++++-------
1 files changed, 337 insertions(+), 55 deletions(-)
diff --git a/program/lib/Roundcube/rcube_db.php b/program/lib/Roundcube/rcube_db.php
index fe5ed39..4ccc59b 100644
--- a/program/lib/Roundcube/rcube_db.php
+++ b/program/lib/Roundcube/rcube_db.php
@@ -1,6 +1,6 @@
<?php
-/**
+/*
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2005-2012, The Roundcube Dev Team |
@@ -32,6 +32,8 @@
protected $db_connected = false; // Already connected ?
protected $db_mode; // Connection mode
protected $dbh; // Connection handle
+ protected $dbhs = array();
+ protected $table_connections = array();
protected $db_error = false;
protected $db_error_msg = '';
@@ -48,6 +50,7 @@
);
const DEBUG_LINE_LENGTH = 4096;
+ const DEFAULT_QUOTE = '`';
/**
* Factory, returns driver-specific instance of the class
@@ -66,6 +69,8 @@
'sybase' => 'mssql',
'dblib' => 'mssql',
'mysqli' => 'mysql',
+ 'oci' => 'oracle',
+ 'oci8' => 'oracle',
);
$driver = isset($driver_map[$driver]) ? $driver_map[$driver] : $driver;
@@ -100,6 +105,12 @@
$this->db_dsnw_array = self::parse_dsn($db_dsnw);
$this->db_dsnr_array = self::parse_dsn($db_dsnr);
+
+ $config = rcube::get_instance()->config;
+
+ $this->options['table_prefix'] = $config->get('db_prefix');
+ $this->options['dsnw_noread'] = $config->get('db_dsnw_noread', false);
+ $this->options['table_dsn_map'] = array_map(array($this, 'table_name'), $config->get('db_table_dsn', array()));
}
/**
@@ -113,6 +124,27 @@
$this->db_error = false;
$this->db_error_msg = null;
+ // return existing handle
+ if ($this->dbhs[$mode]) {
+ $this->dbh = $this->dbhs[$mode];
+ $this->db_mode = $mode;
+ return $this->dbh;
+ }
+
+ // connect to database
+ if ($dbh = $this->conn_create($dsn)) {
+ $this->dbh = $dbh;
+ $this->dbhs[$mode] = $dbh;
+ $this->db_mode = $mode;
+ $this->db_connected = true;
+ }
+ }
+
+ /**
+ * Create PDO connection
+ */
+ protected function conn_create($dsn)
+ {
// Get database specific connection options
$dsn_string = $this->dsn_string($dsn);
$dsn_options = $this->dsn_options($dsn);
@@ -134,6 +166,8 @@
// don't throw exceptions or warnings
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT);
+
+ $this->conn_configure($dsn, $dbh);
}
catch (Exception $e) {
$this->db_error = true;
@@ -146,10 +180,7 @@
return null;
}
- $this->dbh = $dbh;
- $this->db_mode = $mode;
- $this->db_connected = true;
- $this->conn_configure($dsn, $dbh);
+ return $dbh;
}
/**
@@ -175,8 +206,9 @@
* Connect to appropriate database depending on the operation
*
* @param string $mode Connection mode (r|w)
+ * @param boolean $force Enforce using the given mode
*/
- public function db_connect($mode)
+ public function db_connect($mode, $force = false)
{
// previous connection failed, don't attempt to connect again
if ($this->conn_failure) {
@@ -190,14 +222,13 @@
// Already connected
if ($this->db_connected) {
- // connected to db with the same or "higher" mode
- if ($this->db_mode == 'w' || $this->db_mode == $mode) {
+ // connected to db with the same or "higher" mode (if allowed)
+ if ($this->db_mode == $mode || $this->db_mode == 'w' && !$force && !$this->options['dsnw_noread']) {
return;
}
}
$dsn = ($mode == 'r') ? $this->db_dsnr_array : $this->db_dsnw_array;
-
$this->dsn_connect($dsn, $mode);
// use write-master when read-only fails
@@ -206,6 +237,50 @@
}
$this->conn_failure = !$this->db_connected;
+ }
+
+ /**
+ * Analyze the given SQL statement and select the appropriate connection to use
+ */
+ protected function dsn_select($query)
+ {
+ // no replication
+ if ($this->db_dsnw == $this->db_dsnr) {
+ return 'w';
+ }
+
+ // Read or write ?
+ $mode = preg_match('/^(select|show|set)/i', $query) ? 'r' : 'w';
+
+ $start = '[' . $this->options['identifier_start'] . self::DEFAULT_QUOTE . ']';
+ $end = '[' . $this->options['identifier_end'] . self::DEFAULT_QUOTE . ']';
+ $regex = '/(?:^|\s)(from|update|into|join)\s+'.$start.'?([a-z0-9._]+)'.$end.'?\s+/i';
+
+ // find tables involved in this query
+ if (preg_match_all($regex, $query, $matches, PREG_SET_ORDER)) {
+ foreach ($matches as $m) {
+ $table = $m[2];
+
+ // always use direct mapping
+ if ($this->options['table_dsn_map'][$table]) {
+ $mode = $this->options['table_dsn_map'][$table];
+ break; // primary table rules
+ }
+ else if ($mode == 'r') {
+ // connected to db with the same or "higher" mode for this table
+ $db_mode = $this->table_connections[$table];
+ if ($db_mode == 'w' && !$this->options['dsnw_noread']) {
+ $mode = $db_mode;
+ }
+ }
+ }
+
+ // remember mode chosen (for primary table)
+ $table = $matches[0][2];
+ $this->table_connections[$table] = $mode;
+ }
+
+ return $mode;
}
/**
@@ -282,7 +357,7 @@
public function get_variable($varname, $default = null)
{
// to be implemented by driver class
- return $default;
+ return rcube::get_instance()->config->get('db_' . $varname, $default);
}
/**
@@ -338,12 +413,9 @@
*/
protected function _query($query, $offset, $numrows, $params)
{
- $query = trim($query);
+ $query = ltrim($query);
- // Read or write ?
- $mode = preg_match('/^(select|show|set)/i', $query) ? 'r' : 'w';
-
- $this->db_connect($mode);
+ $this->db_connect($this->dsn_select($query), true);
// check connection before proceeding
if (!$this->is_connected()) {
@@ -354,54 +426,126 @@
$query = $this->set_limit($query, $numrows, $offset);
}
- $params = (array) $params;
+ // replace self::DEFAULT_QUOTE with driver-specific quoting
+ $query = $this->query_parse($query);
// 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);
+ if (count($params)) {
+ while ($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('??' => '?')), ';');
+ $query = rtrim($query, " \t\n\r\0\x0B;");
+ // replace escaped '?' and quotes back to normal, see self::quote()
+ $query = str_replace(
+ array('??', self::DEFAULT_QUOTE.self::DEFAULT_QUOTE),
+ array('?', self::DEFAULT_QUOTE),
+ $query
+ );
+
+ // log query
$this->debug($query);
+ return $this->query_execute($query);
+ }
+
+ /**
+ * Query execution
+ */
+ protected function query_execute($query)
+ {
// destroy reference to previous result, required for SQLite driver (#1488874)
- $this->last_result = null;
+ $this->last_result = null;
$this->db_error_msg = null;
// send query
$result = $this->dbh->query($query);
if ($result === false) {
- $error = $this->dbh->errorInfo();
+ $result = $this->handle_error($query);
+ }
- if (empty($this->options['ignore_key_errors']) || $error[0] != '23000') {
- $this->db_error = true;
- $this->db_error_msg = sprintf('[%s] %s', $error[1], $error[2]);
+ return $this->last_result = $result;
+ }
- rcube::raise_error(array('code' => 500, 'type' => 'db',
- 'line' => __LINE__, 'file' => __FILE__,
- 'message' => $this->db_error_msg . " (SQL Query: $query)"
- ), true, false);
+ /**
+ * Parse SQL query and replace identifier quoting
+ *
+ * @param string $query SQL query
+ *
+ * @return string SQL query
+ */
+ protected function query_parse($query)
+ {
+ $start = $this->options['identifier_start'];
+ $end = $this->options['identifier_end'];
+ $quote = self::DEFAULT_QUOTE;
+
+ if ($start == $quote) {
+ return $query;
+ }
+
+ $pos = 0;
+ $in = false;
+
+ while ($pos = strpos($query, $quote, $pos)) {
+ if ($query[$pos+1] == $quote) { // skip escaped quote
+ $pos += 2;
+ }
+ else {
+ if ($in) {
+ $q = $end;
+ $in = false;
+ }
+ else {
+ $q = $start;
+ $in = true;
+ }
+
+ $query = substr_replace($query, $q, $pos, 1);
+ $pos++;
}
}
- $this->last_result = $result;
+ return $query;
+ }
- return $result;
+ /**
+ * Helper method to handle DB errors.
+ * This by default logs the error but could be overriden by a driver implementation
+ *
+ * @param string Query that triggered the error
+ * @return mixed Result to be stored and returned
+ */
+ protected function handle_error($query)
+ {
+ $error = $this->dbh->errorInfo();
+
+ if (empty($this->options['ignore_key_errors']) || !in_array($error[0], array('23000', '23505'))) {
+ $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 . " (SQL Query: $query)"
+ ), true, false);
+ }
+
+ return false;
}
/**
@@ -414,7 +558,9 @@
public function affected_rows($result = null)
{
if ($result || ($result === null && ($result = $this->last_result))) {
- return $result->rowCount();
+ if ($result !== true) {
+ return $result->rowCount();
+ }
}
return 0;
@@ -430,7 +576,7 @@
*/
public function num_rows($result = null)
{
- if ($result || ($result === null && ($result = $this->last_result))) {
+ if (($result || ($result === null && ($result = $this->last_result))) && $result !== true) {
// repeat query with SELECT COUNT(*) ...
if (preg_match('/^SELECT\s+(?:ALL\s+|DISTINCT\s+)?(?:.*?)\s+FROM\s+(.*)$/ims', $result->queryString, $m)) {
$query = $this->dbh->query('SELECT COUNT(*) FROM ' . $m[1], PDO::FETCH_NUM);
@@ -506,7 +652,9 @@
protected function _fetch_row($result, $mode)
{
if ($result || ($result === null && ($result = $this->last_result))) {
- return $result->fetch($mode);
+ if ($result !== true) {
+ return $result->fetch($mode);
+ }
}
return false;
@@ -543,14 +691,11 @@
{
// get tables if not cached
if ($this->tables === null) {
- $q = $this->query('SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES ORDER BY TABLE_NAME');
+ $q = $this->query("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES"
+ . " WHERE TABLE_TYPE = 'BASE TABLE'"
+ . " ORDER BY TABLE_NAME");
- if ($q) {
- $this->tables = $q->fetchAll(PDO::FETCH_COLUMN, 0);
- }
- else {
- $this->tables = array();
- }
+ $this->tables = $q ? $q->fetchAll(PDO::FETCH_COLUMN, 0) : array();
}
return $this->tables;
@@ -573,6 +718,63 @@
}
return array();
+ }
+
+ /**
+ * Start transaction
+ *
+ * @return bool True on success, False on failure
+ */
+ public function startTransaction()
+ {
+ $this->db_connect('w', true);
+
+ // check connection before proceeding
+ if (!$this->is_connected()) {
+ return $this->last_result = false;
+ }
+
+ $this->debug('BEGIN TRANSACTION');
+
+ return $this->last_result = $this->dbh->beginTransaction();
+ }
+
+ /**
+ * Commit transaction
+ *
+ * @return bool True on success, False on failure
+ */
+ public function endTransaction()
+ {
+ $this->db_connect('w', true);
+
+ // check connection before proceeding
+ if (!$this->is_connected()) {
+ return $this->last_result = false;
+ }
+
+ $this->debug('COMMIT TRANSACTION');
+
+ return $this->last_result = $this->dbh->commit();
+ }
+
+ /**
+ * Rollback transaction
+ *
+ * @return bool True on success, False on failure
+ */
+ public function rollbackTransaction()
+ {
+ $this->db_connect('w', true);
+
+ // check connection before proceeding
+ if (!$this->is_connected()) {
+ return $this->last_result = false;
+ }
+
+ $this->debug('ROLLBACK TRANSACTION');
+
+ return $this->last_result = $this->dbh->rollBack();
}
/**
@@ -608,8 +810,13 @@
'bool' => PDO::PARAM_BOOL,
'integer' => PDO::PARAM_INT,
);
+
$type = isset($map[$type]) ? $map[$type] : PDO::PARAM_STR;
- return strtr($this->dbh->quote($input, $type), array('?' => '??')); // escape ?
+
+ return strtr($this->dbh->quote($input, $type),
+ // escape ? and `
+ array('?' => '??', self::DEFAULT_QUOTE => self::DEFAULT_QUOTE.self::DEFAULT_QUOTE)
+ );
}
return 'NULL';
@@ -692,7 +899,7 @@
if ($interval) {
$add = ' ' . ($interval > 0 ? '+' : '-') . ' INTERVAL ';
$add .= $interval > 0 ? intval($interval) : intval($interval) * -1;
- $add .= ' SECONDS';
+ $add .= ' SECOND';
}
return "now()" . $add;
@@ -848,17 +1055,24 @@
/**
* Return correct name for a specific database table
*
- * @param string $table Table name
+ * @param string $table Table name
+ * @param bool $quoted Quote table identifier
*
* @return string Translated table name
*/
- public function table_name($table)
+ public function table_name($table, $quoted = false)
{
- $rcube = rcube::get_instance();
+ // let plugins alter the table name (#1489837)
+ $plugin = rcube::get_instance()->plugins->exec_hook('db_table_name', array('table' => $table));
+ $table = $plugin['table'];
// add prefix to the table name if configured
- if ($prefix = $rcube->config->get('db_prefix')) {
- return $prefix . $table;
+ if (($prefix = $this->options['table_prefix']) && strpos($table, $prefix) !== 0) {
+ $table = $prefix . $table;
+ }
+
+ if ($quoted) {
+ $table = $this->quote_identifier($table);
}
return $table;
@@ -873,6 +1087,17 @@
public function set_option($name, $value)
{
$this->options[$name] = $value;
+ }
+
+ /**
+ * Set DSN connection to be used for the given table
+ *
+ * @param string Table name
+ * @param string DSN connection ('r' or 'w') to be used
+ */
+ public function set_table_dsn($table, $mode)
+ {
+ $this->options['table_dsn_map'][$this->table_name($table)] = $mode;
}
/**
@@ -1048,4 +1273,61 @@
return $result;
}
+
+ /**
+ * Execute the given SQL script
+ *
+ * @param string SQL queries to execute
+ *
+ * @return boolen True on success, False on error
+ */
+ public function exec_script($sql)
+ {
+ $sql = $this->fix_table_names($sql);
+ $buff = '';
+
+ foreach (explode("\n", $sql) as $line) {
+ if (preg_match('/^--/', $line) || trim($line) == '')
+ continue;
+
+ $buff .= $line . "\n";
+ if (preg_match('/(;|^GO)$/', trim($line))) {
+ $this->query($buff);
+ $buff = '';
+ if ($this->db_error) {
+ break;
+ }
+ }
+ }
+
+ return !$this->db_error;
+ }
+
+ /**
+ * Parse SQL file and fix table names according to table prefix
+ */
+ protected function fix_table_names($sql)
+ {
+ if (!$this->options['table_prefix']) {
+ return $sql;
+ }
+
+ $sql = preg_replace_callback(
+ '/((TABLE|TRUNCATE|(?<!ON )UPDATE|INSERT INTO|FROM'
+ . '| ON(?! (DELETE|UPDATE))|REFERENCES|CONSTRAINT|FOREIGN KEY|INDEX)'
+ . '\s+(IF (NOT )?EXISTS )?[`"]*)([^`"\( \r\n]+)/',
+ array($this, 'fix_table_names_callback'),
+ $sql
+ );
+
+ return $sql;
+ }
+
+ /**
+ * Preg_replace callback for fix_table_names()
+ */
+ protected function fix_table_names_callback($matches)
+ {
+ return $matches[1] . $this->options['table_prefix'] . $matches[count($matches)-1];
+ }
}
--
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