forked from extern/egroupware
709 lines
20 KiB
PHP
709 lines
20 KiB
PHP
<?php
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/**
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* API - Timed Asynchron Services for eGroupWare
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*
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* @link http://www.egroupware.org
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @copyright Ralf Becker <RalfBecker-AT-outdoor-training.de>
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*
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @access public
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* @version $Id$
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*/
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/**
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* The class implements a general eGW service to execute callbacks at a given time.
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*
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* see http://www.egroupware.org/wiki/TimedAsyncServices
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*/
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class asyncservice
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{
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var $php = '';
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var $crontab = '';
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/**
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* Our instance of the db-class
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*
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* @var egw_db
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*/
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var $db;
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var $db_table = 'egw_async';
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var $debug = 0;
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/**
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* Line in crontab set by constructor with absolute path
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*
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* @var string
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*/
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var $cronline = '/phpgwapi/cron/asyncservices.php default';
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/**
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* constructor of the class
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*/
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function asyncservice()
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{
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if (is_object($GLOBALS['egw']->db))
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{
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$this->db = $GLOBALS['egw']->db;
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}
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else
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{
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$this->db = $GLOBALS['egw_setup']->db;
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}
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$this->cronline = EGW_SERVER_ROOT . '/phpgwapi/cron/asyncservices.php '.$GLOBALS['egw_info']['user']['domain'];
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$this->only_fallback = substr(php_uname(), 0, 7) == "Windows"; // atm cron-jobs dont work on win
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}
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/**
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* calculates the next run of the timer and puts that with the rest of the data in the db for later execution.
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*
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* @param int/array $times unix timestamp or array('min','hour','dow','day','month','year') with execution time.
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* Repeated events are possible to shedule by setting the array only partly, eg.
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* array('day' => 1) for first day in each month 0am or array('min' => '* /5', 'hour' => '9-17')
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* for every 5mins in the time from 9am to 5pm.
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* @param string $id unique id to cancel the request later, if necessary. Should be in a form like
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* eg. '<app><id>X' where id is the internal id of app and X might indicate the action.
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* @param string $method Method to be called via ExecMethod($method,$data). $method has the form
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* '<app>.<class>.<public function>'.
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* @param mixed $data=null This data is passed back when the method is called. If it is an array,
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* EGroupware will add the rest of the job parameters like id, next (sheduled exec time), times, ...
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* @param int $account_id account_id, under which the methode should be called or False for the actual user
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* @param boolean $debug=false
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* @return boolean False if $id already exists, else True
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*/
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function set_timer($times,$id,$method,$data=null,$account_id=False,$debug=false)
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{
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if (empty($id) || empty($method) || $this->read($id) ||
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!($next = $this->next_run($times,$debug)))
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{
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return False;
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}
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if ($account_id === False)
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{
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$account_id = $GLOBALS['egw_info']['user']['account_id'];
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}
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$job = array(
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'id' => $id,
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'next' => $next,
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'times' => $times,
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'method' => $method,
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'data' => $data,
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'account_id' => $account_id
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);
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$this->write($job);
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return True;
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}
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/**
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* calculates the next execution time for $times
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*
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* @param int/array $times unix timestamp or array('year'=>$year,'month'=>$month,'dow'=>$dow,'day'=>$day,'hour'=>$hour,'min'=>$min)
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* with execution time. Repeated execution is possible to shedule by setting the array only partly,
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* eg. array('day' => 1) for first day in each month 0am or array('min' => '/5', 'hour' => '9-17')
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* for every 5mins in the time from 9am to 5pm. All not set units before the smallest one set,
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* are taken into account as every possible value, all after as the smallest possible value.
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* @param boolean $debug if True some debug-messages about syntax-errors in $times are echoed
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* @param int $now Use this time to calculate then next run from. Defaults to time().
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* @return int a unix timestamp of the next execution time or False if no more executions
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*/
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function next_run($times,$debug=False, $now = null)
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{
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if ($this->debug)
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{
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echo "<p>next_run("; print_r($times); echo ",'$debug', " . date('Y-m-d H:i', $now) . ")</p>\n";
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$debug = True; // enable syntax-error messages too
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}
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if(is_null($now)) {
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$now = time();
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}
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// $times is unix timestamp => if it's not expired return it, else False
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//
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if (!is_array($times))
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{
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$next = (int)$times;
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return $next > $now ? $next : False;
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}
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// If an array is given, we have to enumerate the possible times first
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//
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$units = array(
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'year' => 'Y',
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'month' => 'm',
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'day' => 'd',
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'dow' => 'w',
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'hour' => 'H',
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'min' => 'i'
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);
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$max_unit = array(
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'min' => 59,
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'hour' => 23,
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'dow' => 6,
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'day' => 31,
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'month' => 12,
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'year' => date('Y')+10 // else */[0-9] would never stop returning numbers
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);
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$min_unit = array(
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'min' => 0,
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'hour' => 0,
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'dow' => 0,
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'day' => 1,
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'month' => 1,
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'year' => date('Y')
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);
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// get the number of the first and last pattern set in $times,
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// as empty patterns get enumerated before the the last pattern and
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// get set to the minimum after
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//
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$n = $first_set = $last_set = 0;
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foreach($units as $u => $date_pattern)
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{
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++$n;
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if (isset($times[$u]))
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{
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$last_set = $n;
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if (!$first_set)
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{
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$first_set = $n;
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}
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}
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}
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// now we go through all units and enumerate all patterns and not set patterns
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// (as descript above), enumerations are arrays with unit-values as keys
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//
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$n = 0;
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foreach($units as $u => $date_pattern)
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{
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++$n;
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if ($this->debug) { echo "<p>n=$n, $u: isset(times[$u]="; print_r($times[$u]); echo ")=".(isset($times[$u])?'True':'False')."</p>\n"; }
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if (isset($times[$u]))
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{
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if(is_array($times[$u])) {
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$time = array_keys($times[$u]);
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} else {
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$time = explode(',',$times[$u]);
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}
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$times[$u] = array();
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foreach($time as $t)
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{
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if (strpos($t,'-') !== False && strpos($t,'/') === False)
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{
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list($min,$max) = $arr = explode('-',$t);
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if (count($arr) != 2 || !is_numeric($min) || !is_numeric($max) || $min > $max)
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{
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if ($debug) echo "<p>Syntax error in $u='$t', allowed is 'min-max', min <= max, min='$min', max='$max'</p>\n";
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return False;
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}
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for ($i = (int)$min; $i <= $max; ++$i)
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{
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$times[$u][$i] = True;
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}
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}
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else
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{
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if ((string)$t == '*') $t = '*/1';
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list($one,$inc) = $arr = explode('/',$t);
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if (!(is_numeric($one) && count($arr) == 1 ||
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count($arr) == 2 && is_numeric($inc)))
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{
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if ($debug) echo "<p>Syntax error in $u='$t', allowed is a number or '{*|range}/inc', inc='$inc'</p>\n";
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return False;
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}
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if (count($arr) == 1)
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{
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$times[$u][(int)$one] = True;
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}
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else
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{
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list($min,$max) = $arr = explode('-',$one);
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if (empty($one) || $one == '*')
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{
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$min = $min_unit[$u];
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$max = $max_unit[$u];
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}
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elseif (count($arr) != 2 || $min > $max)
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{
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if ($debug) echo "<p>Syntax error in $u='$t', allowed is '{*|min-max}/inc', min='$min',max='$max', inc='$inc'</p>\n";
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return False;
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}
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for ($i = $min; $i <= $max; $i += $inc)
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{
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$times[$u][$i] = True;
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}
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}
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}
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}
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}
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elseif ($n < $last_set || $u == 'dow') // before last value set (or dow) => empty gets enumerated
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{
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for ($i = $min_unit[$u]; $i <= $max_unit[$u]; ++$i)
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{
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$times[$u][$i] = True;
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}
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}
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else // => after last value set => empty is min-value
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{
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$times[$u][$min_unit[$u]] = True;
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}
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}
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if ($this->debug) { echo "enumerated times=<pre>"; print_r($times); echo "</pre>\n"; }
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// now we have the times enumerated, lets find the first not expired one
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//
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$found = array();
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while (!isset($found['min']))
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{
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$future = False;
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foreach($units as $u => $date_pattern)
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{
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$unit_now = $u != 'dow' ? (int)date($date_pattern, $now) :
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(int)date($date_pattern,mktime(12,0,0,$found['month'],$found['day'],$found['year']));
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if (isset($found[$u]))
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{
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$future = $future || $found[$u] > $unit_now;
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if ($this->debug) echo "--> already have a $u = ".$found[$u].", future='$future'<br>\n";
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continue; // already set
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}
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foreach($times[$u] as $unit_value => $nul)
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{
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switch($u)
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{
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case 'dow':
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$valid = $unit_value == $unit_now;
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break;
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case 'min':
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$valid = $future || $unit_value > $unit_now;
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break;
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default:
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$valid = $future || $unit_value >= $unit_now;
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break;
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}
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if ($valid && ($u != $next || $unit_value > $over)) // valid and not over
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{
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$found[$u] = $unit_value;
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$future = $future || $unit_value > $unit_now;
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break;
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}
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}
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if (!isset($found[$u])) // we have to try the next one, if it exists
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{
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$next = array_keys($units);
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if (!isset($next[count($found)-1]))
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{
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if ($this->debug) echo "<p>Nothing found, exiting !!!</p>\n";
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return False;
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}
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$next = $next[count($found)-1];
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$over = $found[$next];
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unset($found[$next]);
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if ($this->debug) echo "<p>Have to try the next $next, $u's are over for $next=$over !!!</p>\n";
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break;
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}
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}
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}
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if ($this->debug) { echo "<p>next="; print_r($found); echo "</p>\n"; }
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return mktime($found['hour'],$found['min'],0,$found['month'],$found['day'],$found['year']);
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}
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/**
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* cancels a timer
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*
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* @param string $id has to be the one used to set it.
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* @return boolean True if the timer exists and is not expired.
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*/
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function cancel_timer($id)
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{
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return $this->delete($id);
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}
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/**
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* checks when the last check_run was run or set the run-semaphore (async_next != 0) if $semaphore == True
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*
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* @param boolean $semaphore if False only check, if true try to set/release the semaphore
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* @param boolean $release if $semaphore == True, tells if we should set or release the semaphore
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* @return mixed if !$set array('start' => $start,'end' => $end) with timestamps of last check_run start and end, \
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* !$end means check_run is just running. If $set returns True if it was able to get the semaphore, else False
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*/
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function last_check_run($semaphore=False,$release=False,$run_by='')
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{
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//echo "<p>last_check_run(semaphore=".($semaphore?'True':'False').",release=".($release?'True':'False').")</p>\n";
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if ($exists = $this->read('##last-check-run##'))
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{
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list(,$last_run) = each($exists);
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}
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//echo "last_run (from db)=<pre>"; print_r($last_run); echo "</pre>\n";
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if (!$semaphore)
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{
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return $last_run['data'];
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}
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$where = array();
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if ($release)
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{
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$last_run['next'] = 0;
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$last_run['data']['end'] = time();
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}
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else
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{
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@set_time_limit(0); // dont stop for an execution-time-limit
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ignore_user_abort(True);
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$last_run = array(
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'id' => '##last-check-run##',
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'next' => time(),
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'times' => array(),
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'method' => 'none',
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'data' => array(
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'run_by'=> $run_by,
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'start' => time(),
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'end' => 0
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)
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);
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// as the async_next column is used as a semaphore we only update it,
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// if it is 0 (semaphore released) or older then 10min to recover from failed or crashed attempts
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if ($exists) $where = array('async_next=0 OR async_next<'.time()-600);
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}
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//echo "last_run=<pre>"; print_r($last_run); echo "</pre>\n";
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return $this->write($last_run,!!$exits,$where) > 0;
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}
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/**
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* checks if there are any jobs ready to run (timer expired) and executes them
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*/
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function check_run($run_by='')
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{
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if ($run_by === 'fallback') flush();
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if (!$this->last_check_run(True,False,$run_by))
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{
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return False; // cant obtain semaphore
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}
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if ($jobs = $this->read())
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{
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foreach($jobs as $id => $job)
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{
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// checking / setting up egw_info/user
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//
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if ($GLOBALS['egw_info']['user']['account_id'] != $job['account_id'])
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{
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$domain = $GLOBALS['egw_info']['user']['domain'];
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$lang = $GLOBALS['egw_info']['user']['preferences']['common']['lang'];
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unset($GLOBALS['egw_info']['user']);
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if ($GLOBALS['egw']->session->account_id = $job['account_id'])
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{
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$GLOBALS['egw']->session->account_lid = $GLOBALS['egw']->accounts->id2name($job['account_id']);
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$GLOBALS['egw']->session->account_domain = $domain;
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$GLOBALS['egw']->session->read_repositories();
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$GLOBALS['egw_info']['user'] = $GLOBALS['egw']->session->user;
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if ($lang != $GLOBALS['egw_info']['user']['preferences']['common']['lang'])
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{
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translation::init();
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}
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}
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else
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{
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$GLOBALS['egw_info']['user']['domain'] = $domain;
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}
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}
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list($app) = strpos($job['method'],'::') !== false ? explode('_',$job['method']) :
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explode('.',$job['method']);
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translation::add_app($app);
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if (is_array($job['data']))
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{
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$job['data'] += array_diff_key($job,array('data' => false));
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}
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try
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{
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ExecMethod($job['method'],$job['data']);
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}
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catch(Exception $e)
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{
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// log the exception to error_log, but continue running other async jobs
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_egw_log_exception($e);
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}
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// re-read job, in case it had been updated or even deleted in the method
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$updated = $this->read($id);
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if ($updated && isset($updated[$id]))
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{
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$job = $updated[$id];
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if ($job['next'] = $this->next_run($job['times']))
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{
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$this->write($job,True);
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}
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else // no further runs
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{
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$this->delete($job['id']);
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}
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}
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}
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}
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$this->last_check_run(True,True,$run_by); // release semaphore
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return $jobs ? count($jobs) : 0;
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}
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/**
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* reads all matching db-rows / jobs
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*
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* @param string $id =0 reads all expired rows / jobs ready to run\
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* != 0 reads all rows/jobs matching $id (sql-wildcards '%' and '_' can be used)
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* @param array|string $cols='*' string or array of column-names / select-expressions
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* @param int|bool $offset=False offset for a limited query or False (default)
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* @param string $append='ORDER BY async_next' string to append to the end of the query
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* @param int $num_rows=0 number of rows to return if offset set, default 0 = use default in user prefs
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* @return array/boolean db-rows / jobs as array or False if no matches
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*/
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function read($id=0,$cols='*',$offset=False,$append='ORDER BY async_next',$num_rows=0)
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{
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if ($id === '%')
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{
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$where = "async_id != '##last-check-run##'";
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}
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elseif (!is_array($id) && (strpos($id,'%') !== False || strpos($id,'_') !== False))
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{
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$id = $this->db->quote($id);
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$where = "async_id LIKE $id AND async_id != '##last-check-run##'";
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}
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elseif (!$id)
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{
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$where = 'async_next <= '.time()." AND async_id != '##last-check-run##'";
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}
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else
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{
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$where = array('async_id' => $id);
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}
|
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$jobs = array();
|
|
foreach($this->db->select($this->db_table,$cols,$where,__LINE__,__FILE__,$offset,$append,False,$num_rows) as $row)
|
|
{
|
|
$row['async_times'] = unserialize($row['async_times']);
|
|
$row['async_data'] = unserialize($row['async_data']);
|
|
$jobs[$row['async_id']] = egw_db::strip_array_keys($row,'async_');
|
|
}
|
|
if (!count($jobs))
|
|
{
|
|
return False;
|
|
}
|
|
return $jobs;
|
|
}
|
|
|
|
/**
|
|
* write a job / db-row to the db
|
|
*
|
|
* @param array $job db-row as array
|
|
* @param boolean $exits if True, we do an update, else we check if update or insert necesary
|
|
* @param array $where additional where statemetn to update only if a certain condition is met, used for the semaphore
|
|
* @return int affected rows, cat be 0 if an additional where statement is given
|
|
*/
|
|
function write($job,$exists = False,$where=array())
|
|
{
|
|
$data = array(
|
|
'async_next' => $job['next'],
|
|
'async_times' => serialize($job['times']),
|
|
'async_method' => $job['method'],
|
|
'async_data' => serialize($job['data']),
|
|
'async_account_id'=> $job['account_id'],
|
|
);
|
|
if ($exists)
|
|
{
|
|
$this->db->update($this->db_table,$data,array('async_id' => $job['id']),__LINE__,__FILE__);
|
|
}
|
|
else
|
|
{
|
|
$this->db->insert($this->db_table,$data,array('async_id' => $job['id']),__LINE__,__FILE__);
|
|
}
|
|
return $this->db->affected_rows();
|
|
}
|
|
|
|
/**
|
|
* delete db-row / job with $id
|
|
*
|
|
* @return boolean False if $id not found else True
|
|
*/
|
|
function delete($id)
|
|
{
|
|
$this->db->delete($this->db_table,array('async_id' => $id),__LINE__,__FILE__);
|
|
|
|
return $this->db->affected_rows();
|
|
}
|
|
|
|
function find_binarys()
|
|
{
|
|
static $run = False;
|
|
if ($run)
|
|
{
|
|
return;
|
|
}
|
|
$run = True;
|
|
|
|
if (substr(php_uname(), 0, 7) == "Windows")
|
|
{
|
|
// ToDo: find php-cgi on windows
|
|
}
|
|
else
|
|
{
|
|
$binarys = array(
|
|
'php' => '/usr/bin/php',
|
|
'php4' => '/usr/bin/php4', // this is for debian
|
|
'php5' => '/usr/bin/php5', // SuSE 9.3 with php5
|
|
'crontab' => '/usr/bin/crontab'
|
|
);
|
|
foreach ($binarys as $name => $path)
|
|
{
|
|
$this->$name = $path; // a reasonable default for *nix
|
|
|
|
if (!($Ok = @is_executable($this->$name)))
|
|
{
|
|
if (file_exists($this->$name))
|
|
{
|
|
echo '<p>'.lang('%1 is not executable by the webserver !!!',$this->$name)."</p>\n";
|
|
$perms = fileperms($this->$name);
|
|
if (!($perms & 0x0001) && ($perms & 0x0008)) // only executable by group
|
|
{
|
|
$group = posix_getgrgid(filegroup($this->$name));
|
|
$webserver = posix_getpwuid(posix_getuid ());
|
|
echo '<p>'.lang("You need to add the webserver user '%1' to the group '%2'.",$webserver['name'],$group['name'])."</p>\n"; }
|
|
}
|
|
if ($fd = popen('/bin/sh -c "type -p '.$name.'"','r'))
|
|
{
|
|
$this->$name = fgets($fd,256);
|
|
@pclose($fd);
|
|
}
|
|
if ($pos = strpos($this->$name,"\n"))
|
|
{
|
|
$this->$name = substr($this->$name,0,$pos);
|
|
}
|
|
}
|
|
if (!$Ok && !@is_executable($this->$name))
|
|
{
|
|
$this->$name = $name; // hopefully its in the path
|
|
}
|
|
//echo "<p>$name = '".$this->$name."'</p>\n";
|
|
}
|
|
if ($this->php4{0} == '/') // we found a php4 binary
|
|
{
|
|
$this->php = $this->php4;
|
|
}
|
|
if ($this->php5{0} == '/') // we found a php5 binary
|
|
{
|
|
$this->php = $this->php5;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* checks if phpgwapi/cron/asyncservices.php is installed as cron-job
|
|
*
|
|
* @return array the times asyncservices are run (normaly 'min'=>'* /5') or False if not installed or 0 if crontab not found
|
|
* Not implemented for Windows at the moment, always returns 0
|
|
*/
|
|
function installed()
|
|
{
|
|
if ($this->only_fallback) {
|
|
return 0;
|
|
}
|
|
$this->find_binarys();
|
|
|
|
if (!is_executable($this->crontab))
|
|
{
|
|
//echo "<p>Error: $this->crontab not found !!!</p>";
|
|
return 0;
|
|
}
|
|
$times = False;
|
|
$this->other_cronlines = array();
|
|
if (($crontab = popen('/bin/sh -c "'.$this->crontab.' -l" 2>&1','r')) !== False)
|
|
{
|
|
while ($line = fgets($crontab,256))
|
|
{
|
|
if ($this->debug) echo 'line '.++$n.": $line<br>\n";
|
|
$parts = explode(' ',$line,6);
|
|
|
|
if ($line{0} == '#' || count($parts) < 6 || ($parts[5]{0} != '/' && substr($parts[5],0,3) != 'php'))
|
|
{
|
|
// ignore comments
|
|
if ($line{0} != '#')
|
|
{
|
|
$times['error'] .= $line;
|
|
}
|
|
}
|
|
elseif (strpos($line,$this->cronline) !== False)
|
|
{
|
|
$cron_units = array('min','hour','day','month','dow');
|
|
foreach($cron_units as $n => $u)
|
|
{
|
|
$times[$u] = $parts[$n];
|
|
}
|
|
$times['cronline'] = $line;
|
|
}
|
|
else
|
|
{
|
|
$this->other_cronlines[] = $line;
|
|
}
|
|
}
|
|
@pclose($crontab);
|
|
}
|
|
return $times;
|
|
}
|
|
|
|
/**
|
|
* installs /phpgwapi/cron/asyncservices.php as cron-job
|
|
*
|
|
* Not implemented for Windows at the moment, always returns 0
|
|
*
|
|
* @param array $times array with keys 'min','hour','day','month','dow', not set is equal to '*'.
|
|
* False means de-install our own crontab line
|
|
* @return mixed the times asyncservices are run, False if they are not installed,
|
|
* 0 if crontab not found and ' ' if crontab is deinstalled
|
|
*/
|
|
function install($times)
|
|
{
|
|
if ($this->only_fallback && $times !== False) {
|
|
return 0;
|
|
}
|
|
$this->installed(); // find other installed cronlines
|
|
|
|
if (($crontab = popen('/bin/sh -c "'.$this->crontab.' -" 2>&1','w')) !== False)
|
|
{
|
|
if (is_array($this->other_cronlines))
|
|
{
|
|
foreach ($this->other_cronlines as $cronline)
|
|
{
|
|
fwrite($crontab,$cronline); // preserv the other lines on install
|
|
}
|
|
}
|
|
if ($times !== False)
|
|
{
|
|
$cron_units = array('min','hour','day','month','dow');
|
|
$cronline = '';
|
|
foreach($cron_units as $cu)
|
|
{
|
|
$cronline .= (isset($times[$cu]) ? $times[$cu] : '*') . ' ';
|
|
}
|
|
// -d memory_limit=-1 --> no memory limit
|
|
$cronline .= $this->php.' -q -d memory_limit=-1 '.$this->cronline."\n";
|
|
//echo "<p>Installing: '$cronline'</p>\n";
|
|
fwrite($crontab,$cronline);
|
|
}
|
|
@pclose($crontab);
|
|
}
|
|
return $times !== False ? $this->installed() : ' ';
|
|
}
|
|
}
|