mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-12-21 06:01:06 +01:00
484 lines
14 KiB
PHP
484 lines
14 KiB
PHP
<?php
|
|
/**
|
|
* eGroupWare - eTemplate request object storing request-data directly in the form itself
|
|
*
|
|
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
|
|
* @package etemplate
|
|
* @subpackage api
|
|
* @link http://www.egroupware.org
|
|
* @author Ralf Becker <RalfBecker@outdoor-training.de>
|
|
* @copyright (c) 2007-14 by Ralf Becker <RalfBecker@outdoor-training.de>
|
|
* @version $Id$
|
|
*/
|
|
|
|
/**
|
|
* Class to represent the persitent information of an eTemplate request
|
|
*
|
|
* This class stores the request-data direct in a hidden var in the form.
|
|
* As this would allow an evil user to manipulate it and therefore compromise the security
|
|
* of an EGroupware instance, this class should only be used, if mcrypt is available
|
|
* to encrypt that data. The factory method etemplate_request::read() ensures that,
|
|
* by using etemplate_request_session instead.
|
|
*
|
|
* The key used to encrypt the request can be set in header.inc.php by setting
|
|
*
|
|
* $GLOBALS['egw_info']['server']['etemplate_form_key'] = 'something secret';
|
|
*
|
|
* if this var is not set, the db_pass and EGW_SERVER_ROOT is used instead.
|
|
*
|
|
* The request object should be instancated only via the factory method etemplate::request($id=null)
|
|
*
|
|
* $request = etemplate::request();
|
|
*
|
|
* // add request data
|
|
*
|
|
* $id = $request->id();
|
|
*
|
|
* b) open or modify an existing request:
|
|
*
|
|
* if (!($request = etemplate::request($id)))
|
|
* {
|
|
* // request not found
|
|
* }
|
|
*
|
|
* Ajax requests can use this object to open the original request by using the id, they have to transmitt back,
|
|
* and register further variables, modify the registered ones or delete them AND then update the id, if it changed:
|
|
*
|
|
* eTemplate2:
|
|
*
|
|
* if (($new_id = $request->id()) != $exec_id)
|
|
* {
|
|
* egw_json_response::get()->generic('assign', array(
|
|
* 'etemplate_exec_id' => $id,
|
|
* 'id' => '',
|
|
* 'key' => 'etemplate_exec_id',
|
|
* 'value' => $new_id,
|
|
* ));
|
|
* }
|
|
*
|
|
* old eTemplate:
|
|
*
|
|
* if (($new_id = $request->id()) != $exec_id)
|
|
* {
|
|
* egw_json_response::get()->assign('etemplate_exec_id','value',$new_id);
|
|
* }
|
|
*
|
|
* For an example look in link_widget::ajax_search()
|
|
*
|
|
* @property-read boolean $data_modified true if data was modified and therefore needs saving
|
|
* @property int $output_mode
|
|
* @property array $content
|
|
* @property array $changes
|
|
* @property array $sel_options
|
|
* @property array $readonlys
|
|
* @property array $preserv
|
|
* @property string $method
|
|
* @property array $ignore_validation
|
|
* @property array $template
|
|
* @property string $app_header
|
|
*/
|
|
class etemplate_request
|
|
{
|
|
/**
|
|
* here is the request data stored
|
|
*
|
|
* @var array
|
|
*/
|
|
protected $data=array();
|
|
/**
|
|
* Flag if data has been modified and therefor need to be stored again in the session
|
|
*
|
|
* @var boolean
|
|
*/
|
|
protected $data_modified=false;
|
|
/**
|
|
* Flag that stored data should be removed by destructor, if not modified.
|
|
*
|
|
* @var boolean
|
|
*/
|
|
protected $remove_if_not_modified=false;
|
|
/**
|
|
* mcrypt resource
|
|
*
|
|
* @var resource
|
|
*/
|
|
static protected $mcrypt;
|
|
|
|
/**
|
|
* See gzcompress, set it to 0 to not compress
|
|
*
|
|
* @var int
|
|
*/
|
|
static public $compression_level = 6;
|
|
|
|
/**
|
|
* Name of request class used
|
|
*
|
|
* Can be set here to force a certain class, otherwise the factory method chooses one
|
|
*
|
|
* @var string
|
|
*/
|
|
static public $request_class; // = 'etemplate_request_session';
|
|
|
|
/**
|
|
* Factory method to get a new request object or the one for an existing request
|
|
*
|
|
* New default is to use egw_cache to store requests and no longer request or
|
|
* session documented below:
|
|
*
|
|
* If mcrypt AND gzcompress is available this factory method chooses etemplate_request,
|
|
* which stores the request data encrypted in a hidden var directly in the form,
|
|
* over etemplate_request_session, which stores the data in the session (and causing
|
|
* the sesison to constantly grow).
|
|
*
|
|
* @param string $id=null
|
|
* @return etemplate_request
|
|
*/
|
|
public static function read($id=null)
|
|
{
|
|
if (is_null(self::$request_class))
|
|
{
|
|
// new default to use egw_cache to store requests
|
|
self::$request_class = 'etemplate_request_cache';
|
|
/* old default to use request if mcrypt and gzcompress are available and session if not
|
|
self::$request_class = check_load_extension('mcrypt') && function_exists('gzcompress') &&
|
|
self::init_crypt() ? __CLASS__ : 'etemplate_request_session';
|
|
*/
|
|
}
|
|
if (self::$request_class != __CLASS__)
|
|
{
|
|
$request = call_user_func(self::$request_class.'::read', $id);
|
|
}
|
|
else
|
|
{
|
|
$request = new etemplate_request();
|
|
|
|
if (!is_null($id))
|
|
{
|
|
$id = base64_decode($id);
|
|
|
|
// decrypt the data if available
|
|
if (self::init_crypt())
|
|
{
|
|
$id = mdecrypt_generic(self::$mcrypt,$id);
|
|
}
|
|
// uncompress the data if available
|
|
if (self::$compression_level && function_exists('gzcompress'))
|
|
{
|
|
//$len_compressed = bytes($id);
|
|
//$time = microtime(true);
|
|
$id = gzuncompress($id);
|
|
//$time = number_format(1000.0 * (microtime(true) - $time),1);
|
|
//$len_uncompressed = bytes($id);
|
|
//error_log(__METHOD__."() uncompressed from $len_compressed to $len_uncompressed bytes $time ms");
|
|
}
|
|
$request->data = unserialize($id);
|
|
|
|
if (!$request->data)
|
|
{
|
|
error_log(__METHOD__."() id not valid!");
|
|
$request = false;
|
|
}
|
|
//error_log(__METHOD__."() size of request = ".bytes($id));
|
|
}
|
|
}
|
|
if (!$request) // eT2 request/session expired
|
|
{
|
|
list($app) = explode('.', $_GET['menuaction']);
|
|
$index_url = isset($GLOBALS['egw_info']['apps'][$app]['index']) ?
|
|
'/index.php?menuaction='.$GLOBALS['egw_info']['apps'][$app]['index'] : '/'.$app.'/index.php';
|
|
// add a unique token to redirect to avoid client-side framework tries refreshing via nextmatch
|
|
$index_url .= (strpos($index_url, '?') ? '&' : '?').'redirect='.microtime(true);
|
|
error_log(__METHOD__."('$id', ...) eT2 request not found / expired --> redirecting app $app to $index_url (_GET[menuaction]=$_GET[menuaction], isJSONRequest()=".array2string(egw_json_request::isJSONRequest()).')');
|
|
if (egw_json_request::isJSONRequest())
|
|
{
|
|
// we must not redirect ajax_destroy_session calls, as they might originate from our own redirect!
|
|
if (strpos($_GET['menuaction'], '.ajax_destroy_session.etemplate') === false)
|
|
{
|
|
$response = egw_json_response::get();
|
|
$response->redirect($index_url, false, $app);
|
|
common::egw_exit();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
egw_framework::redirect_link($index_url);
|
|
}
|
|
}
|
|
return $request;
|
|
}
|
|
|
|
/**
|
|
* Private constructor to force the instancation of this class only via it's static factory method read
|
|
*
|
|
* @param string $id=null
|
|
*/
|
|
private function __construct($id=null)
|
|
{
|
|
|
|
}
|
|
|
|
/**
|
|
* return the id of this request
|
|
*
|
|
* @return string
|
|
*/
|
|
public function &id()
|
|
{
|
|
$data = serialize($this->data);
|
|
|
|
// compress the data if available
|
|
if (self::$compression_level && function_exists('gzcompress'))
|
|
{
|
|
//$len_uncompressed = bytes($id);
|
|
//$time = microtime(true);
|
|
$data = gzcompress($data, self::$compression_level);
|
|
//$time = number_format(1000.0 * (microtime(true) - $time),1);
|
|
//$len_compressed = bytes($id);
|
|
//error_log(__METHOD__."() compressed from $len_uncompressed to $len_compressed bytes in $time ms");
|
|
}
|
|
// encrypt the data if available
|
|
if (self::init_crypt())
|
|
{
|
|
$data = mcrypt_generic(self::$mcrypt, $data);
|
|
}
|
|
$id = base64_encode($data);
|
|
|
|
//error_log(__METHOD__."() #$this->id: size of request = ".bytes($id));//.", id='$id'");
|
|
//self::debug();
|
|
return $id;
|
|
}
|
|
|
|
/**
|
|
* Register a form-variable to be processed
|
|
*
|
|
* @param string $form_name form-name
|
|
* @param string $type etemplate type
|
|
* @param array $data=array() optional extra data
|
|
*/
|
|
public function set_to_process($form_name,$type,$data=array())
|
|
{
|
|
if (!$form_name || !$type) return;
|
|
|
|
//echo '<p>'.__METHOD__."($form_name,$type,".array2string($data).")</p>\n";
|
|
$data['type'] = $type;
|
|
|
|
// unquote single and double quotes, as this is how they get returned in $_POST
|
|
$form_name = str_replace(array('\\\'','"'),array('\'','"'),$form_name);
|
|
|
|
$this->data['to_process'][$form_name] = $data;
|
|
$this->data_modified = true;
|
|
}
|
|
|
|
/**
|
|
* Set an attribute of a to-process record
|
|
*
|
|
* @param string $form_name form-name
|
|
* @param string $attribute etemplate type
|
|
* @param array $value
|
|
* @param boolean $add_to_array=false should $value be added to the attribute array
|
|
*/
|
|
public function set_to_process_attribute($form_name,$attribute,$value,$add_to_array=false)
|
|
{
|
|
//echo '<p>'.__METHOD__."($form_name,$attribute,$value,$add_to_array)</p>\n";
|
|
if (!$form_name) return;
|
|
|
|
// unquote single and double quotes, as this is how they get returned in $_POST
|
|
$form_name = str_replace(array('\\\'','"'),array('\'','"'),$form_name);
|
|
|
|
if ($add_to_array)
|
|
{
|
|
$this->data['to_process'][$form_name][$attribute][] = $value;
|
|
}
|
|
else
|
|
{
|
|
$this->data['to_process'][$form_name][$attribute] = $value;
|
|
}
|
|
$this->data_modified = true;
|
|
}
|
|
|
|
/**
|
|
* Unregister a form-variable to be no longer processed
|
|
*
|
|
* @param string $form_name form-name
|
|
*/
|
|
public function unset_to_process($form_name)
|
|
{
|
|
//echo '<p>'.__METHOD__."($form_name) isset_to_process($form_name)=".$this->isset_to_process($form_name)."</p>\n";
|
|
unset($this->data['to_process'][$form_name]);
|
|
$this->data_modified = true;
|
|
}
|
|
|
|
/**
|
|
* return the data of a form-var to process or the whole array
|
|
*
|
|
* @param string $form_name=null
|
|
* @return array
|
|
*/
|
|
public function get_to_process($form_name=null)
|
|
{
|
|
//echo '<p>'.__METHOD__."($form_name)</p>\n";
|
|
return $form_name ? $this->data['to_process'][$form_name] : $this->data['to_process'];
|
|
}
|
|
|
|
/**
|
|
* check if something set for a given $form_name
|
|
*
|
|
* @param string $form_name
|
|
* @return boolean
|
|
*/
|
|
public function isset_to_process($form_name)
|
|
{
|
|
//echo '<p>'.__METHOD__."($form_name) = ".array2string(isset($this->data['to_process'][$form_name]))."</p>\n";
|
|
return isset($this->data['to_process'][$form_name]);
|
|
}
|
|
|
|
/**
|
|
* magic function to set all request-vars, used eg. as $request->method = 'app.class.method';
|
|
*
|
|
* @param string $var
|
|
* @param mixed $val
|
|
*/
|
|
public function __set($var,$val)
|
|
{
|
|
if ($this->data[$var] !== $val)
|
|
{
|
|
$this->data[$var] = $val;
|
|
//error_log(__METHOD__."('$var', ...) data of id=$this->id changed ...");
|
|
$this->data_modified = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* magic function to access the request-vars, used eg. as $method = $request->method;
|
|
*
|
|
* @param string $var
|
|
* @return mixed
|
|
*/
|
|
public function &__get($var)
|
|
{
|
|
if ($var == 'data_modified') return $this->data_modified;
|
|
|
|
return $this->data[$var];
|
|
}
|
|
|
|
|
|
/**
|
|
* magic function to see if a request-var has been set
|
|
*
|
|
* @param string $var
|
|
* @return boolean
|
|
*/
|
|
public function __isset($var)
|
|
{
|
|
return array_key_exists($var, $this->data);
|
|
}
|
|
|
|
/**
|
|
* Get the names / keys of existing variables
|
|
*
|
|
* @return array
|
|
*/
|
|
public function names()
|
|
{
|
|
return array_keys($this->data);
|
|
}
|
|
|
|
/**
|
|
* Output the size-wise important parts of a request
|
|
*
|
|
* @param double $min_share minimum share to be reported (in percent of the whole request)
|
|
* @param double $dump_share minimum share from which on a variable get output
|
|
*/
|
|
public function debug($min_share=1.0,$dump_share=25.0)
|
|
{
|
|
echo "<p><b>total size request data = ".($total=strlen(serialize($this->data)))."</b></p>\n";
|
|
echo "<p>shares bigger then $min_share% percent of it:</p>\n";
|
|
foreach($this->data as $key => $val)
|
|
{
|
|
$len = strlen(is_array($val) ? serialize($val) : $val);
|
|
$len .= ' ('.sprintf('%2.1lf',($percent = 100.0 * $len / $total)).'%)';
|
|
if ($percent < $min_share) continue;
|
|
echo "<p><b>$key</b>: strlen(\$val)=$len</p>\n";
|
|
if ($percent >= $dump_share) _debug_array($val);
|
|
if (is_array($val) && $len > 2000)
|
|
{
|
|
foreach($val as $k => $v)
|
|
{
|
|
$l = strlen(is_array($v) ? serialize($v) : $v);
|
|
$l .= ' ('.sprintf('%2.1lf',($p = 100.0 * $l / $total)).'%)';
|
|
if ($p < $min_share) continue;
|
|
echo "<p> - {$key}[$k]: strlen(\$v)=$l</p>\n";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if session encryption is configured, possible and initialise it
|
|
*
|
|
* @param string $algo='tripledes'
|
|
* @param string $mode='ecb'
|
|
* @return boolean true if encryption is used, false otherwise
|
|
*/
|
|
static public function init_crypt($algo='tripledes',$mode='ecb')
|
|
{
|
|
if (is_null(self::$mcrypt))
|
|
{
|
|
if (isset($GLOBALS['egw_info']['server']['etemplate_form_key']))
|
|
{
|
|
$key = $GLOBALS['egw_info']['server']['etemplate_form_key'];
|
|
}
|
|
else
|
|
{
|
|
$key = $GLOBALS['egw_info']['server']['db_pass'].EGW_SERVER_ROOT;
|
|
}
|
|
if (!check_load_extension('mcrypt'))
|
|
{
|
|
error_log(__METHOD__."() required PHP extension mcrypt not loaded and can not be loaded, eTemplate requests get NOT encrypted!");
|
|
return false;
|
|
}
|
|
if (!(self::$mcrypt = mcrypt_module_open($algo, '', $mode, '')))
|
|
{
|
|
error_log(__METHOD__."() could not mcrypt_module_open(algo='$algo','',mode='$mode',''), eTemplate requests get NOT encrypted!");
|
|
return false;
|
|
}
|
|
$iv_size = mcrypt_enc_get_iv_size(self::$mcrypt);
|
|
$iv = !isset($GLOBALS['egw_info']['server']['mcrypt_iv']) || strlen($GLOBALS['egw_info']['server']['mcrypt_iv']) < $iv_size ?
|
|
mcrypt_create_iv ($iv_size, MCRYPT_RAND) : substr($GLOBALS['egw_info']['server']['mcrypt_iv'],0,$iv_size);
|
|
|
|
$key_size = mcrypt_enc_get_key_size(self::$mcrypt);
|
|
if (bytes($key) > $key_size) $key = cut_bytes($key,0,$key_size-1);
|
|
|
|
if (mcrypt_generic_init(self::$mcrypt,$key, $iv) < 0)
|
|
{
|
|
error_log(__METHOD__."() could not initialise mcrypt, sessions get NOT encrypted!");
|
|
return self::$mcrypt = false;
|
|
}
|
|
}
|
|
return is_resource(self::$mcrypt);
|
|
}
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
function __destruct()
|
|
{
|
|
if (self::$mcrypt)
|
|
{
|
|
mcrypt_generic_deinit(self::$mcrypt);
|
|
self::$mcrypt = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Mark request as to destroy, if it does not get modified before destructor is called
|
|
*
|
|
* If that function is called, request is removed from storage, further modification will work!
|
|
*/
|
|
public function remove_if_not_modified()
|
|
{
|
|
$this->remove_if_not_modified = true;
|
|
}
|
|
}
|