* @copyright Ralf Becker * * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License * @package api * @access public * @version $Id$ */ /** * The class implements a general eGW service to execute callbacks at a given time. * * see http://www.egroupware.org/wiki/TimedAsyncServices */ class asyncservice { var $php = ''; var $crontab = ''; /** * Our instance of the db-class * * @var egw_db */ var $db; var $db_table = 'egw_async'; var $debug = 0; /** * Line in crontab set by constructor with absolute path * * @var string */ var $cronline = '/phpgwapi/cron/asyncservices.php default'; /** * constructor of the class */ function asyncservice() { if (is_object($GLOBALS['egw']->db)) { $this->db = $GLOBALS['egw']->db; } else { $this->db = $GLOBALS['egw_setup']->db; } $this->cronline = EGW_SERVER_ROOT . '/phpgwapi/cron/asyncservices.php '.$GLOBALS['egw_info']['user']['domain']; $this->only_fallback = substr(php_uname(), 0, 7) == "Windows"; // atm cron-jobs dont work on win } /** * calculates the next run of the timer and puts that with the rest of the data in the db for later execution. * * @param int/array $times unix timestamp or array('min','hour','dow','day','month','year') with execution time. * Repeated events are possible to shedule by setting the array only partly, eg. * array('day' => 1) for first day in each month 0am or array('min' => '* /5', 'hour' => '9-17') * for every 5mins in the time from 9am to 5pm. * @param string $id unique id to cancel the request later, if necessary. Should be in a form like * eg. 'X' where id is the internal id of app and X might indicate the action. * @param string $method Method to be called via ExecMethod($method,$data). $method has the form * '..'. * @param mixed $data This data is passed back when the method is called. It might simply be an * integer id, but it can also be a complete array. * @param int $account_id account_id, under which the methode should be called or False for the actual user * @return boolean False if $id already exists, else True */ function set_timer($times,$id,$method,$data,$account_id=False) { if (empty($id) || empty($method) || $this->read($id) || !($next = $this->next_run($times))) { return False; } if ($account_id === False) { $account_id = $GLOBALS['egw_info']['user']['account_id']; } $job = array( 'id' => $id, 'next' => $next, 'times' => $times, 'method' => $method, 'data' => $data, 'account_id' => $account_id ); $this->write($job); return True; } /** * calculates the next execution time for $times * * @param int/array $times unix timestamp or array('year'=>$year,'month'=>$month,'dow'=>$dow,'day'=>$day,'hour'=>$hour,'min'=>$min) * with execution time. Repeated execution is possible to shedule by setting the array only partly, * eg. array('day' => 1) for first day in each month 0am or array('min' => '/5', 'hour' => '9-17') * for every 5mins in the time from 9am to 5pm. All not set units before the smallest one set, * are taken into account as every possible value, all after as the smallest possible value. * @param boolean $debug if True some debug-messages about syntax-errors in $times are echoed * @param int $now Use this time to calculate then next run from. Defaults to time(). * @return int a unix timestamp of the next execution time or False if no more executions */ function next_run($times,$debug=False, $now = null) { if ($this->debug) { echo "

next_run("; print_r($times); echo ",'$debug', " . date('Y-m-d H:i', $now) . ")

\n"; $debug = True; // enable syntax-error messages too } if(is_null($now)) { $now = time(); } // $times is unix timestamp => if it's not expired return it, else False // if (!is_array($times)) { $next = (int)$times; return $next > $now ? $next : False; } // If an array is given, we have to enumerate the possible times first // $units = array( 'year' => 'Y', 'month' => 'm', 'day' => 'd', 'dow' => 'w', 'hour' => 'H', 'min' => 'i' ); $max_unit = array( 'min' => 59, 'hour' => 23, 'dow' => 6, 'day' => 31, 'month' => 12, 'year' => date('Y')+10 // else */[0-9] would never stop returning numbers ); $min_unit = array( 'min' => 0, 'hour' => 0, 'dow' => 0, 'day' => 1, 'month' => 1, 'year' => date('Y') ); // get the number of the first and last pattern set in $times, // as empty patterns get enumerated before the the last pattern and // get set to the minimum after // $n = $first_set = $last_set = 0; foreach($units as $u => $date_pattern) { ++$n; if (isset($times[$u])) { $last_set = $n; if (!$first_set) { $first_set = $n; } } } // now we go through all units and enumerate all patterns and not set patterns // (as descript above), enumerations are arrays with unit-values as keys // $n = 0; foreach($units as $u => $date_pattern) { ++$n; if ($this->debug) { echo "

n=$n, $u: isset(times[$u]="; print_r($times[$u]); echo ")=".(isset($times[$u])?'True':'False')."

\n"; } if (isset($times[$u])) { if(is_array($times[$u])) { $time = array_keys($times[$u]); } else { $time = explode(',',$times[$u]); } $times[$u] = array(); foreach($time as $t) { if (strpos($t,'-') !== False && strpos($t,'/') === False) { list($min,$max) = $arr = explode('-',$t); if (count($arr) != 2 || !is_numeric($min) || !is_numeric($max) || $min > $max) { if ($debug) echo "

Syntax error in $u='$t', allowed is 'min-max', min <= max, min='$min', max='$max'

\n"; return False; } for ($i = (int)$min; $i <= $max; ++$i) { $times[$u][$i] = True; } } else { if ((string)$t == '*') $t = '*/1'; list($one,$inc) = $arr = explode('/',$t); if (!(is_numeric($one) && count($arr) == 1 || count($arr) == 2 && is_numeric($inc))) { if ($debug) echo "

Syntax error in $u='$t', allowed is a number or '{*|range}/inc', inc='$inc'

\n"; return False; } if (count($arr) == 1) { $times[$u][(int)$one] = True; } else { list($min,$max) = $arr = explode('-',$one); if (empty($one) || $one == '*') { $min = $min_unit[$u]; $max = $max_unit[$u]; } elseif (count($arr) != 2 || $min > $max) { if ($debug) echo "

Syntax error in $u='$t', allowed is '{*|min-max}/inc', min='$min',max='$max', inc='$inc'

\n"; return False; } for ($i = $min; $i <= $max; $i += $inc) { $times[$u][$i] = True; } } } } } elseif ($n < $last_set || $u == 'dow') // before last value set (or dow) => empty gets enumerated { for ($i = $min_unit[$u]; $i <= $max_unit[$u]; ++$i) { $times[$u][$i] = True; } } else // => after last value set => empty is min-value { $times[$u][$min_unit[$u]] = True; } } if ($this->debug) { echo "enumerated times=
"; print_r($times); echo "
\n"; } // now we have the times enumerated, lets find the first not expired one // $found = array(); while (!isset($found['min'])) { $future = False; foreach($units as $u => $date_pattern) { $unit_now = $u != 'dow' ? (int)date($date_pattern, $now) : (int)date($date_pattern,mktime(12,0,0,$found['month'],$found['day'],$found['year'])); if (isset($found[$u])) { $future = $future || $found[$u] > $unit_now; if ($this->debug) echo "--> already have a $u = ".$found[$u].", future='$future'
\n"; continue; // already set } foreach($times[$u] as $unit_value => $nul) { switch($u) { case 'dow': $valid = $unit_value == $unit_now; break; case 'min': $valid = $future || $unit_value > $unit_now; break; default: $valid = $future || $unit_value >= $unit_now; break; } if ($valid && ($u != $next || $unit_value > $over)) // valid and not over { $found[$u] = $unit_value; $future = $future || $unit_value > $unit_now; break; } } if (!isset($found[$u])) // we have to try the next one, if it exists { $next = array_keys($units); if (!isset($next[count($found)-1])) { if ($this->debug) echo "

Nothing found, exiting !!!

\n"; return False; } $next = $next[count($found)-1]; $over = $found[$next]; unset($found[$next]); if ($this->debug) echo "

Have to try the next $next, $u's are over for $next=$over !!!

\n"; break; } } } if ($this->debug) { echo "

next="; print_r($found); echo "

\n"; } return mktime($found['hour'],$found['min'],0,$found['month'],$found['day'],$found['year']); } /** * cancels a timer * * @param string $id has to be the one used to set it. * @return boolean True if the timer exists and is not expired. */ function cancel_timer($id) { return $this->delete($id); } /** * checks when the last check_run was run or set the run-semaphore (async_next != 0) if $semaphore == True * * @param boolean $semaphore if False only check, if true try to set/release the semaphore * @param boolean $release if $semaphore == True, tells if we should set or release the semaphore * @return mixed if !$set array('start' => $start,'end' => $end) with timestamps of last check_run start and end, \ * !$end means check_run is just running. If $set returns True if it was able to get the semaphore, else False */ function last_check_run($semaphore=False,$release=False,$run_by='') { //echo "

last_check_run(semaphore=".($semaphore?'True':'False').",release=".($release?'True':'False').")

\n"; if ($exists = $this->read('##last-check-run##')) { list(,$last_run) = each($exists); } //echo "last_run (from db)=
"; print_r($last_run); echo "
\n"; if (!$semaphore) { return $last_run['data']; } $where = array(); if ($release) { $last_run['next'] = 0; $last_run['data']['end'] = time(); } else { @set_time_limit(0); // dont stop for an execution-time-limit ignore_user_abort(True); $last_run = array( 'id' => '##last-check-run##', 'next' => time(), 'times' => array(), 'method' => 'none', 'data' => array( 'run_by'=> $run_by, 'start' => time(), 'end' => 0 ) ); // as the async_next column is used as a semaphore we only update it, // if it is 0 (semaphore released) or older then 10min to recover from failed or crashed attempts if ($exists) $where = array('async_next=0 OR async_next<'.time()-600); } //echo "last_run=
"; print_r($last_run); echo "
\n"; return $this->write($last_run,!!$exits,$where) > 0; } /** * checks if there are any jobs ready to run (timer expired) and executes them */ function check_run($run_by='') { if ($run_by === 'fallback') flush(); if (!$this->last_check_run(True,False,$run_by)) { return False; // cant obtain semaphore } if ($jobs = $this->read()) { foreach($jobs as $id => $job) { // checking / setting up egw_info/user // if ($GLOBALS['egw_info']['user']['account_id'] != $job['account_id']) { $domain = $GLOBALS['egw_info']['user']['domain']; $lang = $GLOBALS['egw_info']['user']['preferences']['common']['lang']; unset($GLOBALS['egw_info']['user']); if ($GLOBALS['egw']->session->account_id = $job['account_id']) { $GLOBALS['egw']->session->account_lid = $GLOBALS['egw']->accounts->id2name($job['account_id']); $GLOBALS['egw']->session->account_domain = $domain; $GLOBALS['egw']->session->read_repositories(); $GLOBALS['egw_info']['user'] = $GLOBALS['egw']->session->user; if ($lang != $GLOBALS['egw_info']['user']['preferences']['common']['lang']) { translation::init(); } } else { $GLOBALS['egw_info']['user']['domain'] = $domain; } } list($app) = explode('.',$job['method']); $GLOBALS['egw']->translation->add_app($app); try { ExecMethod($job['method'],$job['data']); } catch(Exception $e) { // log the exception to error_log, but continue running other async jobs _egw_log_exception($e); } // re-read job, in case it had been updated or even deleted in the method $updated = $this->read($id); if ($updated && isset($updated[$id])) { $job = $updated[$id]; if ($job['next'] = $this->next_run($job['times'])) { $this->write($job,True); } else // no further runs { $this->delete($job['id']); } } } } $this->last_check_run(True,True,$run_by); // release semaphore return $jobs ? count($jobs) : 0; } /** * reads all matching db-rows / jobs * * @param string $id =0 reads all expired rows / jobs ready to run\ * != 0 reads all rows/jobs matching $id (sql-wildcards '%' and '_' can be used) * @return array/boolean db-rows / jobs as array or False if no matches */ function read($id=0) { if ($id === '%') { $where = "async_id != '##last-check-run##'"; } elseif (!is_array($id) && (strpos($id,'%') !== False || strpos($id,'_') !== False)) { $id = $this->db->quote($id); $where = "async_id LIKE $id AND async_id != '##last-check-run##'"; } elseif (!$id) { $where = 'async_next <= '.time()." AND async_id != '##last-check-run##'"; } else { $where = array('async_id' => $id); } $jobs = array(); foreach($this->db->select($this->db_table,'*',$where,__LINE__,__FILE__) 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 '

'.lang('%1 is not executable by the webserver !!!',$this->$name)."

\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 '

'.lang("You need to add the webserver user '%1' to the group '%2'.",$webserver['name'],$group['name'])."

\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 "

$name = '".$this->$name."'

\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 "

Error: $this->crontab not found !!!

"; 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
\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 "

Installing: '$cronline'

\n"; fwrite($crontab,$cronline); } @pclose($crontab); } return $times !== False ? $this->installed() : ' '; } }