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egroupware_official/phpgwapi/inc/class.db_backup.inc.php

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<?php
/**
* EGroupware API: Database backups
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage db
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2003-12 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @version $Id$
*/
/**
* DB independent backup and restore of EGroupware database
*/
class db_backup
{
/**
* Configuration table.
*/
const TABLE = 'egw_config';
/**
* Reference to schema_proc
*
* @var schema_proc
*/
var $schema_proc;
/**
* Reference to ADOdb (connection) object
*
* @var ADOConnection
*/
var $adodb;
/**
* DB schemas, as array tablename => schema
*
* @var array
*/
var $schemas = array();
/**
* Tables to exclude from the backup: sessions, diverse caches which get automatic rebuild
*
* @var array
*/
var $exclude_tables = array(
'egw_sessions','egw_app_sessions','phpgw_sessions','phpgw_app_sessions', // eGW's session-tables
'phpgw_anglemail', // email's cache
'egw_felamimail_cache','egw_felamimail_folderstatus','phpgw_felamimail_cache','phpgw_felamimail_folderstatus', // felamimail's cache
'egw_phpfreechat', // as of the fieldnames of the table a restore would fail within egroupware, and chatcontent is of no particular intrest
);
/**
* regular expression to identify system-tables => ignored for schema+backup
*
* @var string|boolean
*/
var $system_tables = false;
/**
* Regular expression to identify eGW tables => if set only they are used
*
* @var string|boolean
*/
var $egw_tables = false;
/**
* Backup directory.
*
* @var string
*/
var $backup_dir;
/**
* Minimum number of backup files to keep. Zero for: Disable cleanup.
*
* @var integer
*/
var $backup_mincount;
/**
* Backup Files config value, will be overwritten by the availability of the ZibArchive libraries
*
* @var boolean
*/
var $backup_files = false ;
/**
* Constructor
*/
function __construct()
{
if (isset($GLOBALS['egw_setup']) && is_object($GLOBALS['egw_setup']) && !isset($GLOBALS['egw_setup']->db))
{
$GLOBALS['egw_setup']->loaddb(); // we run inside setup, but db object is not loaded
}
if (isset($GLOBALS['egw_setup']->oProc) && is_object($GLOBALS['egw_setup']->oProc)) // schema_proc already instanciated, use it
{
$this->schema_proc = $GLOBALS['egw_setup']->oProc;
}
else
{
$this->schema_proc = new schema_proc();
}
$this->db = $this->schema_proc->m_odb;
$this->adodb = $this->db->Link_ID;
if (isset($GLOBALS['egw_setup']) && is_object($GLOBALS['egw_setup'])) // called from setup
{
if ($GLOBALS['egw_setup']->config_table && $GLOBALS['egw_setup']->table_exist(array($GLOBALS['egw_setup']->config_table)))
{
$this->db->query("SELECT config_value FROM {$GLOBALS['egw_setup']->config_table} WHERE config_app='phpgwapi' AND config_name='backup_dir'",__LINE__,__FILE__);
$this->db->next_record();
if (!($this->backup_dir = $this->db->f(0)))
{
$this->db->query("SELECT config_value FROM {$GLOBALS['egw_setup']->config_table} WHERE config_app='phpgwapi' AND config_name='files_dir'",__LINE__,__FILE__);
$this->db->next_record();
$this->backup_dir = $this->db->f(0).'/db_backup';
}
$this->db->query("SELECT config_value FROM {$GLOBALS['egw_setup']->config_table} WHERE config_app='phpgwapi' AND config_name='files_dir'",__LINE__,__FILE__);
$this->db->next_record();
if (!($this->files_dir = $this->db->f(0)))
{
error_log(__METHOD__."->"."No files Directory set/found");
}
$this->db->query("SELECT config_value FROM {$GLOBALS['egw_setup']->config_table} WHERE config_app='phpgwapi' AND config_name='system_charset'",__LINE__,__FILE__);
$this->db->next_record();
$this->charset = $this->db->f(0);
if (!$this->charset)
{
$this->db->query("SELECT content FROM {$GLOBALS['egw_setup']->lang_table} WHERE message_id='charset' AND app_name='common' AND lang!='en'",__LINE__,__FILE__);
$this->db->next_record();
$this->charset = $this->db->f(0);
}
$this->db->select($GLOBALS['egw_setup']->applications_table,'app_version',array('app_name'=>'phpgwapi'),__LINE__,__FILE__);
$this->api_version = $this->db->next_record() ? $this->db->f(0) : false;
/* Backup settings */
$this->db->query("SELECT config_value FROM {$GLOBALS['egw_setup']->config_table} WHERE config_app='phpgwapi' AND config_name='backup_mincount'",__LINE__,__FILE__);
$this->db->next_record();
$this->backup_mincount = $this->db->f(0);
// backup files too
$this->db->query("SELECT config_value FROM {$GLOBALS['egw_setup']->config_table} WHERE config_app='phpgwapi' AND config_name='backup_files'",__LINE__,__FILE__);
$this->db->next_record();
$this->backup_files = (bool)$this->db->f(0);
}
if (!$this->charset) $this->charset = 'iso-8859-1';
}
else // called from eGW
{
$this->schema_proc = CreateObject('phpgwapi.schema_proc');
if (!($this->backup_dir = $GLOBALS['egw_info']['server']['backup_dir']))
{
$this->backup_dir = $GLOBALS['egw_info']['server']['files_dir'].'/db_backup';
}
$this->files_dir = $GLOBALS['egw_info']['server']['files_dir'];
$this->backup_mincount = $GLOBALS['egw_info']['server']['backup_mincount'];
$this->backup_files = $GLOBALS['egw_info']['server']['backup_files'];
$this->charset = $GLOBALS['egw']->translation->charset();
$this->api_version = $GLOBALS['egw_info']['apps']['phpgwapi']['version'];
}
// Set a default value if not set.
if (!isset($this->backup_mincount))
{
$this->backup_mincount = 0; // Disabled if not set
}
if (!isset($this->backup_files))
{
$this->backup_files = false; // Disabled if not set
}
if (!is_dir($this->backup_dir) && is_writable(dirname($this->backup_dir)))
{
mkdir($this->backup_dir);
}
switch($this->db->Type)
{
case 'sapdb':
case 'maxdb':
//$this->system_tables = '/^(sql_cursor.*|session_roles|activeconfiguration|cachestatistics|commandcachestatistics|commandstatistics|datastatistics|datavolumes|hotstandbycomponent|hotstandbygroup|instance|logvolumes|machineconfiguration|machineutilization|memoryallocatorstatistics|memoryholders|omslocks|optimizerinformation|sessions|snapshots|spinlockstatistics|version)$/i';
$this->egw_tables = '/^(egw_|phpgw_|g2_)/i';
break;
}
}
/**
* Opens the backup-file using the highest available compression
*
* @param $name=false string/boolean filename to use, or false for the default one
* @param $reading=false opening for reading ('rb') or writing ('wb')
* @return string/resource/zip error-msg of file-handle
*/
function fopen_backup($name=false,$reading=false)
{
//echo "function fopen_backup($name,$reading)<br>"; // !
if (!$name)
{
//echo '-> !$name<br>'; // !
if (!$this->backup_dir || !is_writable($this->backup_dir))
{
//echo ' -> !$this->backup_dir || !is_writable($this->backup_dir)<br>'; // !
return lang("backupdir '%1' is not writeable by the webserver",$this->backup_dir);
}
$name = $this->backup_dir.'/db_backup-'.date('YmdHi');
}
else // remove the extension, to use the correct wrapper based on the extension
{
//echo '-> else<br>'; // !
$name = preg_replace('/\.(bz2|gz)$/i','',$name);
}
$mode = $reading ? 'rb' : 'wb';
list( , $type) = explode('.', basename($name));
if($type == 'zip' && $reading && $this->backup_files)
{
//echo '-> $type == "zip" && $reading<br>'; // !
if(!class_exists('ZipArchive', false))
{
$this->backup_files = false;
//echo ' -> (new ZipArchive) == NULL<br>'; // !
return lang("Cant open %1, needs ZipArchive", $name)."<br>\n";
}
if(!($f = fopen($name, $mode)))
{
//echo ' -> !($f = fopen($name, $mode))<br>'; // !
$lang_mode = $reading ? lang("reading") : lang("writing");
return lang("Cant open '%1' for %2", $name, $lang_mode)."<br>";
}
return $f;
}
if(class_exists('ZipArchive', false) && !$reading && $this->backup_files)
{
//echo '-> (new ZipArchive) != NULL && !$reading; '.$name.'<br>'; // !
if(!($f = fopen($name, $mode)))
{
//echo ' -> !($f = fopen($name, $mode))<br>'; // !
$lang_mode = $reading ? lang("reading") : lang("writing");
return lang("Cant open '%1' for %2", $name, $lang_mode)."<br>";
}
return $f;
}
if(!($f = fopen("compress.bzip2://$name.bz2", $mode)) &&
!($f = fopen("compress.zlib://$name.gz",$mode)) &&
!($f = fopen($name,$mode))
)
{
//echo '-> !($f = fopen("compress.bzip2://$name.bz2", $mode))<br>'; // !
$lang_mode = $reading ? lang("reading") : lang("writing");
return lang("Cant open '%1' for %2", $name, $lang_mode)."<br>";
}
return $f;
}
/**
* Remove old backups, leaving at least
* backup_mincount backup files in place. Only backup files with
* the regular name scheme are taken into account.
*
* @param files_return Fills a given array of file names to display (if given).
*/
function housekeeping(&$files_return = false)
{
/* Stop housekeeping in case it is disabled. */
if ($this->backup_mincount == 0)
{
return;
}
/* Search the backup directory for matching files. */
$handle = @opendir($this->backup_dir);
$files = array();
while($handle && ($file = readdir($handle)))
{
/* Filter for only the files with the regular name (un-renamed).
* Leave special backup files (renamed) in place.
* Note that this also excludes "." and "..".
*/
if (preg_match("/^db_backup-[0-9]{12}(\.bz2|\.gz|\.zip|)$/",$file))
{
$files[filectime($this->backup_dir.'/'.$file)] = $file;
}
}
if ($handle) closedir($handle);
/* Sort the files by ctime. */
krsort($files);
$count = 0;
foreach($files as $ctime => $file)
{
if ($count >= $this->backup_mincount)//
{
$ret = unlink($this->backup_dir.'/'.$file);
if (($ret) && (is_array($files_return)))
{
array_push($files_return, $file);
}
}
$count ++;
}
}
/**
* Save the housekeeping configuration in the database and update the local variables.
*
* @param int $mincount Minimum number of backups to keep.
* @param boolean $backup_files include files in backup or not, default dont change!
*/
function saveConfig($minCount,$backupFiles=null)
{
config::save_value('backup_mincount',$this->backup_mincount=(int)$minCount,'phpgwapi');
if (!is_null($backupFiles))
{
config::save_value('backup_files',$this->backup_files=(boolean)$backupFiles,'phpgwapi');
}
}
/**
* Certain config settings NOT to restore (because they break a working system)
*
* @var array
*/
static $system_config = array(
'files_dir',
'temp_dir',
'backup_dir',
'backup_files',
'webserver_url',
'aspell_path',
'hostname',
'httpproxy_server',
'httpproxy_port',
'httpproxy_server_username',
'httpproxy_server_password',
'system_charset',
'usecookies',
'install_id', // do not restore install_id, as that would give two systems with identical install_id
);
/**
* Backup all data in the form of a (compressed) csv file
*
* @param resource $f file opened with fopen for reading
* @param boolean $convert_to_system_charset=true convert the restored data to the selected system-charset
* @param string $filename='' gives the file name which is used in case of a zip archive.
* @param boolean $protect_system_config=true should above system_config values be protected (NOT overwritten)
* @param int $insert_n_rows=10 how many rows to insert in one sql statement
*
* @returns An empty string or an error message in case of failure.
*/
function restore($f,$convert_to_system_charset=true,$filename='',$protect_system_config=true, $insert_n_rows=10)
{
@set_time_limit(0);
ini_set('auto_detect_line_endings',true);
$convert_to_system_charset = true; // enforce now utf-8 as system charset restores of old backups
if ($protect_system_config)
{
$system_config = array();
foreach($this->db->select(self::TABLE,'*',array(
'config_app' => 'phpgwapi',
'config_name' => self::$system_config,
),__LINE__,__FILE__) as $row)
{
$system_config[] = $row;
}
}
$this->db->transaction_begin();
// drop all existing tables
foreach($this->adodb->MetaTables('TABLES') as $table)
{
if ($this->system_tables && preg_match($this->system_tables,$table) ||
$this->egw_tables && !preg_match($this->egw_tables,$table))
{
continue;
}
$this->schema_proc->DropTable($table);
}
// it could be an old backup
list( , $type) = explode('.', basename($filename));
$dir = $this->files_dir; // $GLOBALS['egw_info']['server']['files_dir'];
// we may have to clean up old backup - left overs
if (is_dir($dir.'/database_backup'))
{
self::remove_dir_content($dir.'/database_backup/');
rmdir($dir.'/database_backup');
}
$list = array();
$name = "";
$zip = NULL;
$_f = NULL;
if($type == 'zip')
{
// has already been verified to be available in fopen_backup
$zip = new ZipArchive;
if(($zip->open($filename)) !== TRUE)
{
return lang("Cant open '%1' for %2", $filename, lang("reading"))."<br>\n";
}
self::remove_dir_content($dir); // removes the files-dir
$zip->extractTo($dir);
$_f = $f;
$list = $this->get_file_list($dir.'/database_backup/');
$name = $dir.'/database_backup/'.basename($list[0]);
if(!($f = fopen($name, 'rb')))
{
return lang("Cant open '%1' for %2", $filename, lang("reading"))."<br>\n";
}
}
// do not stop if for whatever reason some sql statement fails
if ($this->db->Halt_On_Error != 'no')
{
$backup_db_halt_on_error = $this->db->Halt_On_Error;
$this->db->Halt_On_Error = 'no';
}
$table = False;
$n = 0;
while(!feof($f))
{
$line = trim(fgets($f)); ++$n;
if (empty($line)) continue;
if (substr($line,0,9) == 'version: ')
{
$api_version = trim(substr($line,9));
continue;
}
if (substr($line,0,9) == 'charset: ')
{
$charset = trim(substr($line,9));
// needed if mbstring.func_overload > 0, else eg. substr does not work with non ascii chars
@ini_set('mbstring.internal_encoding',$charset);
// check if we really need to convert the charset, as it's not perfect and can do some damage
if ($convert_to_system_charset && !strcasecmp($convert_to_system_charset,$charset))
{
$convert_to_system_charset = false; // no conversation necessary
}
// set the DB's client encoding (for mysql only if api_version >= 1.0.1.019)
if ((!$convert_to_system_charset || $this->db->capabilities['client_encoding']) &&
(substr($this->db->Type,0,5) != 'mysql' || !is_object($GLOBALS['egw_setup']) ||
$api_version && !$GLOBALS['egw_setup']->alessthanb($api_version,'1.0.1.019')))
{
$this->db->Link_ID->SetCharSet($charset);
if (!$convert_to_system_charset)
{
$this->schema_proc->system_charset = $charset; // so schema_proc uses it for the creation of the tables
}
}
continue;
}
if (substr($line,0,8) == 'schema: ')
{
// create the tables in the backup set
$this->schemas = unserialize(trim(substr($line,8)));
foreach($this->schemas as $table_name => $schema)
{
// if column is longtext in current schema, convert text to longtext, in case user already updated column
foreach($schema['fd'] as $col => &$def)
{
if ($def['type'] == 'text' && $this->db->get_column_attribute($col, $table, true, 'type') == 'longtext')
{
$def['type'] = 'longtext';
}
}
//echo "<pre>$table_name => ".self::write_array($schema,1)."</pre>\n";
$this->schema_proc->CreateTable($table_name, $schema);
}
continue;
}
if (substr($line,0,7) == 'table: ')
{
if ($rows) // flush pending rows of last table
{
$this->db->insert($table,$rows,False,__LINE__,__FILE__,false,false,$this->schemas[$table]);
}
$rows = array();
$table = substr($line,7);
$cols = self::csv_split($line=fgets($f)); ++$n;
$blobs = array();
foreach($this->schemas[$table]['fd'] as $col => $data)
{
if ($data['type'] == 'blob') $blobs[] = $col;
}
if (feof($f)) break;
continue;
}
if ($convert_to_system_charset && !$this->db->capabilities['client_encoding'])
{
if ($GLOBALS['egw_setup'])
{
if (!is_object($GLOBALS['egw_setup']->translation->sql))
{
$GLOBALS['egw_setup']->translation->setup_translation_sql();
}
}
}
if ($table) // do we already reached the data part
{
$import = true;
$data = self::csv_split($line, $cols, $blobs);
if ($table == 'egw_async' && in_array('##last-check-run##',$data))
{
//echo '<p>'.lang("Line %1: '%2'<br><b>csv data does contain ##last-check-run## of table %3 ==> ignored</b>",$n,$line,$table)."</p>\n";
//echo 'data=<pre>'.print_r($data,true)."</pre>\n";
$import = false;
}
if (in_array($table,$this->exclude_tables))
{
echo '<p><b>'.lang("Table %1 is excluded from backup and restore. Data will not be restored.",$table)."</b></p>\n";
$import = false; // dont restore data of excluded tables
}
if ($import)
{
if (count($data) == count($cols))
{
if ($convert_to_system_charset && !$this->db->capabilities['client_encoding'])
{
$data = translation::convert($data,$charset);
}
if ($insert_n_rows > 1)
{
$rows[] = $data;
if (count($rows) == $insert_n_rows)
{
$this->db->insert($table,$rows,False,__LINE__,__FILE__,false,false,$this->schemas[$table]);
$rows = array();
}
}
else
{
$this->db->insert($table,$data,False,__LINE__,__FILE__,false,false,$this->schemas[$table]);
}
}
else
{
echo '<p>'.lang("Line %1: '%2'<br><b>csv data does not match column-count of table %3 ==> ignored</b>",$n,$line,$table)."</p>\n";
echo 'data=<pre>'.print_r($data,true)."</pre>\n";
}
}
}
}
if ($rows) // flush pending rows
{
$this->db->insert($table,$rows,False,__LINE__,__FILE__,false,false,$this->schemas[$table]);
}
// updated the sequences, if the DB uses them
foreach($this->schemas as $table => $schema)
{
foreach($schema['fd'] as $column => $definition)
{
if ($definition['type'] == 'auto')
{
$this->schema_proc->UpdateSequence($table,$column);
break; // max. one per table
}
}
}
if ($convert_to_system_charset) // store the changed charset
{
$this->db->insert($GLOBALS['egw_setup']->config_table,array(
'config_value' => $GLOBALS['egw_setup']->system_charset,
),array(
'config_app' => 'phpgwapi',
'config_name' => 'system_charset',
),__LINE__,__FILE__);
}
// restore protected system config
if ($protect_system_config)
{
foreach($system_config as $row)
{
$this->db->insert(self::TABLE,array('config_value'=>$row['config_value']),array(
'config_name' => $row['config_name'],
'config_app' => $row['config_app'],
),__LINE__,__FILE__);
}
// check and reset cookie configuration, if it does not match current enviroment
// if $_SERVER[HTTP_HOST] does not end with cookiedomain --> delete cookiedomain
if (($cookiedomain = $this->db->select(self::TABLE,'config_value',array(
'config_app' => 'phpgwapi',
'config_name' => 'cookiedomain',
),__LINE__,__FILE__)->fetchColumn()) && isset($_SERVER['HTTP_HOST']) &&
(list($hostname) = explode(':',$_SERVER['HTTP_HOST'])) &&
substr($hostname,-strlen($cookiedomain) !== $cookiedomain))
{
$this->db->delete(self::TABLE,array(
'config_app' => 'phpgwapi',
'config_name' => 'cookiedomain',
),__LINE__,__FILE__);
}
// if configured webserver_url does NOT start with cookiepath --> delete cookiepath
if (($cookiepath = $this->db->select(self::TABLE,'config_value',array(
'config_app' => 'phpgwapi',
'config_name' => 'cookiepath',
),__LINE__,__FILE__)->fetchColumn()) &&
substr(parse_url($system_config['webserver_url'], PHP_URL_PATH),0,strlen($cookiepath) !== $cookiepath))
{
$this->db->delete(self::TABLE,array(
'config_app' => 'phpgwapi',
'config_name' => 'cookiepath',
),__LINE__,__FILE__);
}
}
// restore original Halt_On_Error state (if changed)
if ($backup_db_halt_on_error)
{
$this->db->Halt_On_Error = $backup_db_halt_on_error;
}
// zip?
if($type == 'zip')
{
fclose($f);
$f = $save_f;
unlink($name);
rmdir($dir.'/database_backup');
}
if (!$this->db->transaction_commit())
{
return lang('Restore failed');
}
// search-and-register-hooks
$GLOBALS['egw']->hooks->register_all_hooks();
return '';
}
/**
* Removes a dir, no matter whether it is empty or full
*
* @param strin $dir
*/
private static function remove_dir_content($dir)
{
$list = scandir($dir);
while($file = $list[0])
{
if(is_dir($file) && $file != '.' && $file != '..')
self::remove_dir_content($dir.'/'.$file);
if(is_file($file) && $file != '.' && $file != '..')
unlink($dir.'/'.$file);
array_shift($list);
}
//rmdir($dir); // dont remove own dir
}
/**
* temp. replaces backslashes
*/
const BACKSLASH_TOKEN = '##!!**bAcKsLaSh**!!##';
/**
* temp. replaces NULL
*/
const NULL_TOKEN = '##!!**NuLl**!!##';
/**
* Split one line of a csv file into an array and does all unescaping
*
* @param string $line line to split
* @param array $keys=null keys to use or null to use numeric ones
* @param array $blobs=array() blob columns
* @return array
*/
public static function csv_split($line, $keys=null, $blobs=array())
{
if (function_exists('str_getcsv')) // php5.3+
{
// we need to take care of literal "NULL" values, replacing them we a special token as str_getcsv removes enclosures around strings
// str_getcsv uses '""' for '"' instead of '\\"' and does not unescape '\\n', '\\r' or '\\\\' (two backslashes)
$fields = str_getcsv(strtr($line, array(
'"NULL"' => self::NULL_TOKEN,
'\\\\' => self::BACKSLASH_TOKEN,
'\\"' => '""',
'\\n' => "\n",
'\\r' => "\r")), ',', '"', '\0');
// replace NULL-token again with 'NULL', 'NULL' with null and BACKSLASH-token with a backslash
foreach($fields as &$field)
{
switch($field)
{
case self::NULL_TOKEN:
$field = 'NULL';
break;
case 'NULL':
$field = null;
break;
default:
$field = str_replace(self::BACKSLASH_TOKEN, '\\', $field);
break;
}
}
if ($keys) // if string keys are to be used --> combine keys and values
{
$fields = array_combine($keys, $fields);
// base64-decode blob columns, if they are base64 encoded
foreach($blobs as $key)
{
if (!is_null($fields[$key]) && ($tmp = base64_decode($fields[$key], true)) !== false)
{
$fields[$key] = $tmp;
}
}
}
return $fields;
}
// pre 5.3 implementation
$fields = explode(',',trim($line));
$str_pending = False;
$n = 0;
foreach($fields as $i => $field)
{
if ($str_pending !== False)
{
$field = $str_pending.','.$field;
$str_pending = False;
}
$key = $keys ? $keys[$n] : $n;
if ($field[0] == '"')
{
if (substr($field,-1) !== '"' || $field === '"' || !preg_match('/[^\\\\]+(\\\\\\\\)*"$/',$field))
{
$str_pending = $field;
continue;
}
$arr[$key] = str_replace(self::BACKSLASH_TOKEN,'\\',str_replace(array('\\\\','\\n','\\r','\\"'),array(self::BACKSLASH_TOKEN,"\n","\r",'"'),substr($field,1,-1)));
}
elseif ($keys && strlen($field) > 26)
{
$arr[$key] = base64_decode($field);
}
else
{
$arr[$key] = $field == 'NULL' ? NULL : $field;
}
++$n;
}
return $arr;
}
/**
* escape data for csv
*/
public static function escape_data(&$data,$col,$defs)
{
if (is_null($data))
{
$data = 'NULL';
}
else
{
switch($defs[$col]['type'])
{
case 'int':
case 'auto':
case 'decimal':
case 'date':
case 'timestamp':
break;
case 'blob':
$data = base64_encode($data);
break;
default:
$data = '"'.str_replace(array('\\',"\n","\r",'"'),array('\\\\','\\n','\\r','\\"'),$data).'"';
break;
}
}
}
/**
* Number of rows to select per chunk, to not run into memory limit on huge tables
*/
const ROW_CHUNK = 100;
/**
* Backup all data in the form of a (compressed) csv file
*
* @param f resource file opened with fopen for writing
*/
function backup($f)
{
//echo "function backup($f)<br>"; // !
@set_time_limit(0);
$dir = $this->files_dir; // $GLOBALS['egw_info']['server']['files_dir'];
// we may have to clean up old backup - left overs
if (is_dir($dir.'/database_backup'))
{
self::remove_dir_content($dir.'/database_backup/');
rmdir($dir.'/database_backup');
}
$file_list = array();
$name = $this->backup_dir.'/db_backup-'.date('YmdHi');
$filename = $name.'.zip';
$zippresent = false;
if(class_exists('ZipArchive') && $this->backup_files)
{
$zip = new ZipArchive;
if(is_object($zip))
{
$zippresent = true;
//echo '-> is_object($zip); '.$filename.'<br>'; // !
$res = $zip->open($filename, ZIPARCHIVE::CREATE);
if($res !== TRUE)
{
//echo ' -> !$res<br>'; // !
return lang("Cant open '%1' for %2", $filename, lang("writing"))."<br>\n";
}
$file_list = $this->get_file_list($dir);
}
}
fwrite($f,"EGroupware backup from ".date('Y-m-d H:i:s')."\n\n");
fwrite($f,"version: $this->api_version\n\n");
fwrite($f,"charset: $this->charset\n\n");
$this->schema_backup($f); // add the schema in a human readable form too
fwrite($f,"\nschema: ".serialize($this->schemas)."\n");
foreach($this->schemas as $table => $schema)
{
if (in_array($table,$this->exclude_tables)) continue; // dont backup
$total = 0;
do {
$num_rows = 0;
// querying only chunks for 100 rows, to not run into memory limit on huge tables
foreach($this->db->select($table, '*', false, __LINE__, __FILE__, $total, '', false, self::ROW_CHUNK) as $row)
{
if ($total === 0) fwrite($f,"\ntable: $table\n".implode(',',array_keys($row))."\n");
array_walk($row,array('db_backup','escape_data'),$schema['fd']);
fwrite($f,implode(',',$row)."\n");
++$total;
++$num_rows;
}
}
while(!($total % self::ROW_CHUNK) && $num_rows);
}
if(!$zippresent) // save without files
{
if ($this->backup_files)
{
echo '<center>'.lang("Cant open %1, needs ZipArchive", $name)."<br>\n".'</center>';
}
fclose($f);
if (file_exists($name)) unlink($name);
return TRUE;
}
// save files ....
//echo $name.'<br>';
$zip->addFile($name, 'database_backup/'.basename($name));
$count = 1;
foreach($file_list as $num => $file)
{
//echo substr($file,strlen($dir)+1).'<br>';
//echo $file.'<br>';
$zip->addFile($file,substr($file,strlen($dir)+1));//,substr($file);
if(($count++) == 100) { // the file descriptor limit
$zip->close();
if($zip = new ZipArchive()) {
$zip->open($filename);
$count =0;
}
}
}
$zip->close();
fclose($f);
unlink($name);
return true;
}
/**
* gets a list of all files on $f
*
* @param string file $f
* @param int $cnt=0
* @param string $path_name=''
*
* @return array (list of files)
*/
function get_file_list($f, $cnt = 0, $path_name = '')
{
//chdir($f);
//echo "Processing $f <br>";
if ($path_name =='') $path_name = $f;
$tlist = scandir($f);
$list = array();
$i = $cnt;
while($file = $tlist[0]) // remove all '.' and '..' and transfer to $list
{
if($file == '.' || $file == '..')
{
array_shift($tlist);
}
else
{
if(is_dir($f.'/'.$file))
{
$nlist = $this->get_file_list($f.'/'.$file, $i);
$list += $nlist;
$i += count($nlist);
array_shift($tlist);
}
else
{
$list[$i++] = $path_name.'/'.array_shift($tlist);
}
}
}
return $list;
}
/**
* Backup all schemas in the form of a setup/tables_current.inc.php file
*
* @param resource|boolean $f
*/
function schema_backup($f=False)
{
foreach($this->adodb->MetaTables('TABLES') as $table)
{
if ($this->system_tables && preg_match($this->system_tables,$table) ||
$this->egw_tables && !preg_match($this->egw_tables,$table))
{
continue;
}
if ($this->db->Type == 'sapdb' || $this->db->Type == 'maxdb')
{
$table = strtolower($table);
}
if (!($this->schemas[$table] = $this->schema_proc->GetTableDefinition($table)))
{
unset($this->schemas[$table]);
}
if (($this->db->Type == 'sapdb' || $this->db->Type == 'maxdb') && $table == 'phpgw_anglemail')
{
// sapdb does not differ between text and blob
$this->schemas[$table]['fd']['content']['type'] = 'blob';
}
}
$def = "\t\$phpgw_baseline = ";
$def .= self::write_array($this->schemas,1);
$def .= ";\n";
if ($f)
{
fwrite($f,$def);
}
else
{
$def = "<?php\n\t/* EGroupware schema-backup from ".date('Y-m-d H:i:s')." */\n\n".$def;
html::content_header('schema-backup-'.date('YmdHi').'.inc.php','text/plain',bytes($def));
echo $def;
}
}
/**
* Dump an array as php source
*
* copied from etemplate/inc/class.db_tools.inc.php
*/
private static function write_array($arr,$depth,$parent='')
{
if (in_array($parent,array('pk','fk','ix','uc')))
{
$depth = 0;
}
if ($depth)
{
$tabs = "\n";
for ($n = 0; $n < $depth; ++$n)
{
$tabs .= "\t";
}
++$depth;
}
$def = "array($tabs".($tabs ? "\t" : '');
$n = 0;
foreach($arr as $key => $val)
{
if (!is_int($key))
{
$def .= "'$key' => ";
}
if (is_array($val))
{
$def .= self::write_array($val,$parent == 'fd' ? 0 : $depth,$key);
}
else
{
if (!$only_vals && $key === 'nullable')
{
$def .= $val ? 'True' : 'False';
}
else
{
$def .= "'$val'";
}
}
if ($n < count($arr)-1)
{
$def .= ",$tabs".($tabs ? "\t" : '');
}
++$n;
}
$def .= "$tabs)";
return $def;
}
}
/*
$line = '"de","NULL","ranking",NULL,NULL,"one backslash: \\\\ here","\\\\","use \\"yes\\", or \\"no, prefession\\"","benützen Sie \\"yes\\" oder \\"no, Beruf\\"",NULL';
echo "<p>line='$line'</p>\n";
$fields = db_backup::csv_split($line);
echo "<pre>".print_r($fields,true)."</pre>\n";
//echo count($fields)." fields\n";
*/
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