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egroupware/phpgwapi/inc/class.db_backup.inc.php

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<?php
/**************************************************************************\
* eGroupWare - Setup - db-backups *
* http://www.egroupware.org *
* -------------------------------------------- *
* Written and copyright by Ralf Becker <RalfBecker@outdoor-training.de> *
* -------------------------------------------- *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; either version 2 of the License, or (at your *
* option) any later version. *
\**************************************************************************/
/* $Id$ */
/**
* DB independent backup and restore of eGW's DB
*
* @class db_backup
* @author RalfBecker-AT-outdoor-training.de
* @license GPL
*/
class db_backup
{
var $schema_proc; /** schema_proc class */
var $schemas = array(); /** array tablename => schema */
var $exclude_tables = array( /** exclude from backup */
'phpgw_sessions','phpgw_app_sessions', // eGW's session-tables
'phpgw_anglemail', // email's cache
'phpgw_felamimail_cache','phpgw_felamimail_folderstatus', // felamimail's cache
);
var $system_tables = false; /** regular expression to identify system-tables => ignored for schema+backup */
var $egw_tables = false; /** regurar expression to identify eGW tables => if set only they are used */
var $backslash_token = '##!!**bAcKsLaSh**!!##'; // used in cvs_split
/**
* Constructor
*/
function db_backup()
{
if (is_object($GLOBALS['phpgw_setup']->oProc)) // schema_proc already instanciated, use it
{
$this->schema_proc = $GLOBALS['phpgw_setup']->oProc;
}
else
{
$this->schema_proc = CreateObject('phpgwapi.schema_proc');
}
$this->db = $this->schema_proc->m_odb;
$this->adodb = &$GLOBALS['phpgw']->ADOdb;
if (is_object($GLOBALS['phpgw_setup'])) // called from setup
{
$tables = $this->adodb->MetaTables('TABLES');
if (in_array('phpgw_config',$tables))
{
$this->db->query("SELECT config_value FROM phpgw_config 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 phpgw_config 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 phpgw_config 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 phpgw_lang WHERE message_id='charset' AND app_name='common' AND lang!='en'",__LINE__,__FILE__);
$this->db->next_record();
$this->charset = $this->db->f(0);
}
}
if (!$this->charset) $this->charset = 'iso-8859-1';
}
else // called from eGW
{
$this->schema_proc = CreateObject('phpgwapi.schema_proc');
if (!($this->backup_dir = $GLOBALS['phpgw_info']['server']['backup_dir']))
{
$this->backup_dir = $GLOBALS['phpgw_info']['server']['files_dir'].'/db_backup';
}
$this->charset = $GLOBALS['phpgw']->translation->charset();
}
if (!is_dir($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_)/i';
break;
}
}
/**
* Opens the backup-file using the highest availible compression
*
* @param $name=false string/boolean filename to use, or false for the default one
* @param $reading=false opening for reading ('rb') or writing ('wb')
* @return string/resource error-msg of file-handle
*/
function fopen_backup($name=false,$reading=false)
{
if (!$name)
{
if (!$this->backup_dir || !is_writable($this->backup_dir))
{
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
{
$name = preg_replace('/\.(bz2|gz)$/i','',$name);
}
$mode = $reading ? 'rb' : 'wb';
if (!($f = @fopen($file = "compress.bzip2://$name.bz2",$mode)) &&
!($f = @fopen($file = "compress.zlib://$name.gz",$mode)) &&
!($f = @fopen($file = "zlib:$name.gz",$mode)) && // php < 4.3
!($f = @fopen($file = $name,$mode)))
{
$lang_mode = $reading ? lang('reading') : lang('writing');
return lang("Cant open '%1' for %2",$name,$lang_mode);
}
return $f;
}
/**
* Backup all data in the form of a (compressed) csv file
*
* @param $f resource file opened with fopen for reading
*/
function restore($f)
{
@set_time_limit(0);
ini_set('auto_detect_line_endings',true);
$this->db->transaction_begin();
// drop all existing tables
foreach($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);
}
$table = False;
$n = 0;
while(!feof($f))
{
$line = trim(fgets($f)); ++$n;
if (empty($line)) continue;
if (substr($line,0,9) == 'charset: ')
{
$charset = substr($line,9);
// needed if mbstring.func_overload > 0, else eg. substr does not work with non ascii chars
@ini_set('mbstring.internal_encoding',$charset);
// set the DB's client encoding
$this->db->Link_ID->SetCharSet($charset);
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 => $schema)
{
echo "<pre>$table_name => ".$this->write_array($schema,1)."</pre>\n";
$this->schema_proc->CreateTable($table_name,$schema);
}
// make the schemas availible for the db-class
$GLOBALS['phpgw_info']['apps']['all-apps']['table_defs'] = &$this->schemas;
continue;
}
if (substr($line,0,7) == 'table: ')
{
$table = substr($line,7);
$cols = $this->csv_split($line=fgets($f)); ++$n;
if (feof($f)) break;
continue;
}
if ($table) // do we already reached the data part
{
$data = $this->csv_split($line,$cols);
if (count($data) == count($cols))
{
$this->db->insert($table,$data,False,__LINE__,__FILE__,'all-apps',true);
}
else
{
echo '<p>'.lang("Line %1: '%2'<br><b>csv data does not match column-count of table %3 ==> ignored</b>",$n,$line,$table)."</p>\n";
echo 'data=<pre>'.print_r($data,true)."</pre>\n";
}
}
}
// updated the sequences, if the DB uses them
foreach($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
}
}
}
$this->db->transaction_commit();
}
/**
* Split one line of a csv file into an array and does all unescaping
* @internal
*/
function csv_split($line,$keys=False)
{
$fields = explode(',',trim($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 === '"')
{
$str_pending = $field;
continue;
}
// count the number of backslashes before the finishing double-quote
// it's not escaped if the number is even (incl. zero)
for($anz_bslash = 0, $i = strlen($field)-2; $i >= 0 && $field[$i] == '\\'; --$i,++$anz_bslash);
if ($anz_bslash & 1) // ending double quote is escaped and does not end the string
{
$str_pending = $field;
continue;
}
$arr[$key] = str_replace($this->backslash_token,'\\',str_replace(array('\\\\','\\n','\\r','\\"'),array($this->backslash_token,"\n","\r",'"'),substr($field,1,-1)));
}
else
{
$arr[$key] = $field == 'NULL' ? NULL : $field;
}
++$n;
}
return $arr;
}
/**
* @internal
*/
function escape_data(&$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;
default:
$data = '"'.str_replace(array('\\',"\n","\r",'"'),array('\\\\','\\n','\\r','\\"'),$data).'"';
break;
}
}
}
/**
* Backup all data in the form of a (compressed) csv file
*
* @param f resource file opened with fopen for writing
*/
function backup($f)
{
@set_time_limit(0);
fwrite($f,"eGroupWare backup from ".date('Y-m-d H:i:s')."\n");
fwrite($f,"\ncharset: $this->charset\n\n");
$this->schema_backup($f); // add the schema in a human readable form too
/* not needed, already done by schema_backup
foreach($this->adodb->MetaTables('TABLES') as $table)
{
if ($this->db->Type == 'sapdb' || $this->db->Type == 'maxdb')
{
$table = strtolower($table);
}
if (!($this->schemas[$table] = $this->schema_proc->GetTableDefinition($table)))
{
unset($this->schemas[$table]);
}
}
*/
fwrite($f,"\nschema: ".serialize($this->schemas)."\n");
foreach($this->schemas as $table => $schema)
{
if (in_array($table,$this->exclude_tables)) continue; // dont backup
$first_row = true;
$this->db->select($table,'*',false,__LINE__,__FILE__);
while(($row = $this->db->row(true)))
{
if ($first_row)
{
fwrite($f,"\ntable: $table\n".implode(',',array_keys($row))."\n");
$first_row = false;
}
array_walk($row,array('db_backup','escape_data'),$schema['fd']);
fwrite($f,implode(',',$row)."\n");
}
}
return true;
}
/**
* Backup all schemas in the form of a setup/tables_current.inc.php file
*
* @param f resource/boolean
*/
function schema_backup($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 .= $this->write_array($this->schemas,1);
$def .= ";\n";
if ($f)
{
fwrite($f,$def);
}
else
{
if (!is_object($this->browser))
{
$this->browser = CreateObject('phpgwapi.browser');
}
$this->browser->content_header('schema-backup-'.date('YmdHi').'.inc.php','text/plain',strlen($def));
echo "<?php\n\t/* eGroupWare schema-backup from ".date('Y-m-d H:i:s')." */\n\n".$def;
}
}
/**
* @internal copied from etemplate/inc/class.db_tools.inc.php
*/
function write_array($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 .= $this->write_array($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;
}
}
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