forked from GNUsocial/gnu-social
291 lines
10 KiB
PHP
291 lines
10 KiB
PHP
<?php
|
|
/*
|
|
* StatusNet - the distributed open-source microblogging tool
|
|
* Copyright (C) 2010, StatusNet, Inc.
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
|
|
|
|
/**
|
|
* Extended DB_DataObject to improve a few things:
|
|
* - free global resources from destructor
|
|
* - remove bogus global references from serialized objects
|
|
* - don't leak memory when loading already-used .ini files
|
|
* (eg when using the same schema on thousands of databases)
|
|
*/
|
|
class Safe_DataObject extends DB_DataObject
|
|
{
|
|
/**
|
|
* Destructor to free global memory resources associated with
|
|
* this data object when it's unset or goes out of scope.
|
|
* DB_DataObject doesn't do this yet by itself.
|
|
*/
|
|
|
|
function __destruct()
|
|
{
|
|
$this->free();
|
|
if (method_exists('DB_DataObject', '__destruct')) {
|
|
parent::__destruct();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Magic function called at clone() time.
|
|
*
|
|
* We use this to drop connection with some global resources.
|
|
* This supports the fairly common pattern where individual
|
|
* items being read in a loop via a single object are cloned
|
|
* for individual processing, then fall out of scope when the
|
|
* loop comes around again.
|
|
*
|
|
* As that triggers the destructor, we want to make sure that
|
|
* the original object doesn't have its database result killed.
|
|
* It will still be freed properly when the original object
|
|
* gets destroyed.
|
|
*/
|
|
function __clone()
|
|
{
|
|
$this->_DB_resultid = false;
|
|
}
|
|
|
|
/**
|
|
* Magic function called at serialize() time.
|
|
*
|
|
* We use this to drop a couple process-specific references
|
|
* from DB_DataObject which can cause trouble in future
|
|
* processes.
|
|
*
|
|
* @return array of variable names to include in serialization.
|
|
*/
|
|
function __sleep()
|
|
{
|
|
$vars = array_keys(get_object_vars($this));
|
|
$skip = array('_DB_resultid', '_link_loaded');
|
|
return array_diff($vars, $skip);
|
|
}
|
|
|
|
/**
|
|
* Magic function called at unserialize() time.
|
|
*
|
|
* Clean out some process-specific variables which might
|
|
* be floating around from a previous process's cached
|
|
* objects.
|
|
*
|
|
* Old cached objects may still have them.
|
|
*/
|
|
function __wakeup()
|
|
{
|
|
// Refers to global state info from a previous process.
|
|
// Clear this out so we don't accidentally break global
|
|
// state in *this* process.
|
|
$this->_DB_resultid = null;
|
|
// We don't have any local DBO refs, so clear these out.
|
|
$this->_link_loaded = false;
|
|
}
|
|
|
|
/**
|
|
* Magic function called when someone attempts to call a method
|
|
* that doesn't exist. DB_DataObject uses this to implement
|
|
* setters and getters for fields, but neglects to throw an error
|
|
* when you just misspell an actual method name. This leads to
|
|
* silent failures which can cause all kinds of havoc.
|
|
*
|
|
* @param string $method
|
|
* @param array $params
|
|
* @return mixed
|
|
* @throws Exception
|
|
*/
|
|
function __call($method, $params)
|
|
{
|
|
$return = null;
|
|
// Yes, that's _call with one underscore, which does the
|
|
// actual implementation.
|
|
if ($this->_call($method, $params, $return)) {
|
|
return $return;
|
|
} else {
|
|
// Low level exception. No need for i18n as discussed with Brion.
|
|
throw new Exception('Call to undefined method ' .
|
|
get_class($this) . '::' . $method);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Work around memory-leak bugs...
|
|
* Had to copy-paste the whole function in order to patch a couple lines of it.
|
|
* Would be nice if this code was better factored.
|
|
*
|
|
* @param optional string name of database to assign / read
|
|
* @param optional array structure of database, and keys
|
|
* @param optional array table links
|
|
*
|
|
* @access public
|
|
* @return true or PEAR:error on wrong paramenters.. or false if no file exists..
|
|
* or the array(tablename => array(column_name=>type)) if called with 1 argument.. (databasename)
|
|
*/
|
|
function databaseStructure()
|
|
{
|
|
global $_DB_DATAOBJECT;
|
|
|
|
// Assignment code
|
|
|
|
if ($args = func_get_args()) {
|
|
|
|
if (count($args) == 1) {
|
|
|
|
// this returns all the tables and their structure..
|
|
if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
|
|
$this->debug("Loading Generator as databaseStructure called with args",1);
|
|
}
|
|
|
|
$x = new DB_DataObject;
|
|
$x->_database = $args[0];
|
|
$this->_connect();
|
|
$DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
|
|
|
|
$tables = $DB->getListOf('tables');
|
|
class_exists('DB_DataObject_Generator') ? '' :
|
|
require_once 'DB/DataObject/Generator.php';
|
|
|
|
foreach($tables as $table) {
|
|
$y = new DB_DataObject_Generator;
|
|
$y->fillTableSchema($x->_database,$table);
|
|
}
|
|
return $_DB_DATAOBJECT['INI'][$x->_database];
|
|
} else {
|
|
|
|
$_DB_DATAOBJECT['INI'][$args[0]] = isset($_DB_DATAOBJECT['INI'][$args[0]]) ?
|
|
$_DB_DATAOBJECT['INI'][$args[0]] + $args[1] : $args[1];
|
|
|
|
if (isset($args[1])) {
|
|
$_DB_DATAOBJECT['LINKS'][$args[0]] = isset($_DB_DATAOBJECT['LINKS'][$args[0]]) ?
|
|
$_DB_DATAOBJECT['LINKS'][$args[0]] + $args[2] : $args[2];
|
|
}
|
|
return true;
|
|
}
|
|
|
|
}
|
|
|
|
if (!$this->_database) {
|
|
$this->_connect();
|
|
}
|
|
|
|
// loaded already?
|
|
if (!empty($_DB_DATAOBJECT['INI'][$this->_database])) {
|
|
|
|
// database loaded - but this is table is not available..
|
|
if (
|
|
empty($_DB_DATAOBJECT['INI'][$this->_database][$this->__table])
|
|
&& !empty($_DB_DATAOBJECT['CONFIG']['proxy'])
|
|
) {
|
|
if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
|
|
$this->debug("Loading Generator to fetch Schema",1);
|
|
}
|
|
class_exists('DB_DataObject_Generator') ? '' :
|
|
require_once 'DB/DataObject/Generator.php';
|
|
|
|
|
|
$x = new DB_DataObject_Generator;
|
|
$x->fillTableSchema($this->_database,$this->__table);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (empty($_DB_DATAOBJECT['CONFIG'])) {
|
|
DB_DataObject::_loadConfig();
|
|
}
|
|
|
|
// if you supply this with arguments, then it will take those
|
|
// as the database and links array...
|
|
|
|
$schemas = isset($_DB_DATAOBJECT['CONFIG']['schema_location']) ?
|
|
array("{$_DB_DATAOBJECT['CONFIG']['schema_location']}/{$this->_database}.ini") :
|
|
array() ;
|
|
|
|
if (isset($_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"])) {
|
|
$schemas = is_array($_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"]) ?
|
|
$_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"] :
|
|
explode(PATH_SEPARATOR,$_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"]);
|
|
}
|
|
|
|
/* BEGIN CHANGED FROM UPSTREAM */
|
|
$_DB_DATAOBJECT['INI'][$this->_database] = $this->parseIniFiles($schemas);
|
|
/* END CHANGED FROM UPSTREAM */
|
|
|
|
// now have we loaded the structure..
|
|
|
|
if (!empty($_DB_DATAOBJECT['INI'][$this->_database][$this->__table])) {
|
|
return true;
|
|
}
|
|
// - if not try building it..
|
|
if (!empty($_DB_DATAOBJECT['CONFIG']['proxy'])) {
|
|
class_exists('DB_DataObject_Generator') ? '' :
|
|
require_once 'DB/DataObject/Generator.php';
|
|
|
|
$x = new DB_DataObject_Generator;
|
|
$x->fillTableSchema($this->_database,$this->__table);
|
|
// should this fail!!!???
|
|
return true;
|
|
}
|
|
$this->debug("Cant find database schema: {$this->_database}/{$this->__table} \n".
|
|
"in links file data: " . print_r($_DB_DATAOBJECT['INI'],true),"databaseStructure",5);
|
|
// we have to die here!! - it causes chaos if we don't (including looping forever!)
|
|
// Low level exception. No need for i18n as discussed with Brion.
|
|
$this->raiseError( "Unable to load schema for database and table (turn debugging up to 5 for full error message)", DB_DATAOBJECT_ERROR_INVALIDARGS, PEAR_ERROR_DIE);
|
|
return false;
|
|
}
|
|
|
|
/** For parseIniFiles */
|
|
protected static $iniCache = array();
|
|
|
|
/**
|
|
* When switching site configurations, DB_DataObject was loading its
|
|
* .ini files over and over, leaking gobs of memory.
|
|
* This refactored helper function uses a local cache of .ini files
|
|
* to minimize the leaks.
|
|
*
|
|
* @param array of .ini file names $schemas
|
|
* @return array
|
|
*/
|
|
protected function parseIniFiles($schemas)
|
|
{
|
|
$key = implode("|", $schemas);
|
|
if (!isset(Safe_DataObject::$iniCache[$key])) {
|
|
$data = array();
|
|
foreach ($schemas as $ini) {
|
|
if (file_exists($ini) && is_file($ini)) {
|
|
$data = array_merge($data, parse_ini_file($ini, true));
|
|
|
|
if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
|
|
if (!is_readable ($ini)) {
|
|
$this->debug("ini file is not readable: $ini","databaseStructure",1);
|
|
} else {
|
|
$this->debug("Loaded ini file: $ini","databaseStructure",1);
|
|
}
|
|
}
|
|
} else {
|
|
if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
|
|
$this->debug("Missing ini file: $ini","databaseStructure",1);
|
|
}
|
|
}
|
|
}
|
|
Safe_DataObject::$iniCache[$key] = $data;
|
|
}
|
|
|
|
return Safe_DataObject::$iniCache[$key];
|
|
}
|
|
}
|
|
|