<?php
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/*
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Copyright (c) 2007, Till Brehm, projektfarm Gmbh
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Modified 2009, Marius Cramer, pixcept KG
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of ISPConfig nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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class validate_cron {
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function get_error($errmsg) {
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global $app;
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if(isset($app->tform->wordbook[$errmsg])) {
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return $app->tform->wordbook[$errmsg]."<br>\r\n";
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} else {
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return $errmsg."<br>\r\n";
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}
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}
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/*
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Validator function to check if a given cron command is in correct form (url only).
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*/
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function command_format($field_name, $field_value, $validator) {
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if(preg_match("'^(\w+):\/\/'", $field_value, $matches)) {
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$parsed = parse_url($field_value);
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if($parsed === false) return $this->get_error($validator['errmsg']);
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if($parsed["scheme"] != "http" && $parsed["scheme"] != "https") return $this->get_error($validator['errmsg']);
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if(preg_match("'^([a-z0-9][a-z0-9\-]{0,62}\.)+([A-Za-z0-9\-]{2,30})$'i", $parsed["host"]) == false) return $this->get_error($validator['errmsg']);
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}
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}
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function run_month_format($field_name, $field_value, $validator) {
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global $app;
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//* allow value @reboot in month field
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if($field_value != '@reboot') {
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return $this->run_time_format($field_name, $field_value, $validator);
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}
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}
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/*
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Validator function to check if a given cron time is in correct form.
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*/
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function run_time_format($field_name, $field_value, $validator) {
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global $app;
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//* check general form
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$is_ok = true;
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$field_value = str_replace(" ", "", $field_value); // spaces are not needed
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$used_times = array();
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if(preg_match("'^[0-9\-\,\/\*]+$'", $field_value) == false) return $this->get_error($validator['errmsg']); // allowed characters are 0-9, comma, *, -, /
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elseif(preg_match("'[\-\,\/][\-\,\/]'", $field_value) == true) return $this->get_error($validator['errmsg']); // comma, - and / never stand together
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//* now split list and check each entry. store used values in array for later limit-check
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$time_list = explode(",", $field_value);
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if(count($time_list) < 1) return $this->get_error($validator['errmsg']);
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$max_entry = 0;
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$min_entry = 0;
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$in_minutes = 1;
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//* get maximum value of entry for each field type (name)
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switch($field_name) {
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case "run_min":
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$max_entry = 59;
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break;
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case "run_hour":
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$max_entry = 23;
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$in_minutes = 60;
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break;
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case "run_mday":
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$max_entry = 31;
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$min_entry = 1;
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$in_minutes = 1440;
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break;
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case "run_month":
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$max_entry = 12;
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$min_entry = 1;
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$in_minutes = 1440 * 28; // not exactly but enough
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break;
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case "run_wday":
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$max_entry = 7;
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$in_minutes = 1440;
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break;
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}
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if($max_entry == 0) return $this->get_error('unknown_fieldtype_error');
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foreach($time_list as $entry) {
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//* possible value combinations:
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//* x => ^(\d+)$
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//* x-y => ^(\d+)\-(\d+)$
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//* x/y => ^(\d+)\/([1-9]\d*)$
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//* x-y/z => ^(\d+)\-(\d+)\/([1-9]\d*)$
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//* */x => ^\*\/([1-9]\d*)$
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//* combined regex => ^(\d+|\*)(\-(\d+))?(\/([1-9]\d*))?$
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if(preg_match("'^(((\d+)(\-(\d+))?)|\*)(\/([1-9]\d*))?$'", $entry, $matches) == false) {
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return $this->get_error($validator['errmsg']);
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}
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//* matches contains:
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//* 1 => * or value or x-y range
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//* 2 => unused
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//* 3 => value if [1] != *
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//* 4 => empty if no range was used
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//* 5 => 2nd value of range if [1] != * and range was used
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//* 6 => empty if step was not used
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//* 7 => step
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$loop_step = 1;
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$loop_from = $min_entry;
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$loop_to = $max_entry;
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//* calculate used values
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if($matches[1] == "*") {
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//* not to check
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} else {
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if($matches[3] < $min_entry || $matches[3] > $max_entry) {
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//* check if value is in allowed range
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return $this->get_error($validator['errmsg']);
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} elseif($matches[4] && ($matches[5] < $min_entry || $matches[5] > $max_entry || $matches[5] <= $matches[3])) {
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//* check if value is in allowed range and not less or equal to first value
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return $this->get_error($validator['errmsg']);
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}
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$loop_from = $matches[3];
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$loop_to = $matches[3];
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if($matches[4]) $loop_to = $matches[5];
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}
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if($matches[6] && ($matches[7] < 2 || $matches[7] > $max_entry - 1)) {
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//* check if step value is valid
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return $this->get_error($validator['errmsg']);
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}
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if($matches[7]) $loop_step = $matches[7];
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//* loop through values to set used times
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for($t = $loop_from; $t <= $loop_to; $t = $t + $loop_step) {
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$used_times[] = $t;
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}
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} //* end foreach entry loop
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//* sort used times and erase doubles
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sort($used_times);
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$used_times = array_unique($used_times);
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//* get minimum frequency and store it in $app->tform->cron_min_freq for usage in onUpdateSave and onInsertSave!
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$min_freq = -1;
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$prev_time = -1;
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foreach($used_times as $curtime) {
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if($prev_time != -1) {
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$freq = $curtime - $prev_time;
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if($min_freq == -1 || $freq < $min_freq) $min_freq = $freq;
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}
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$prev_time = $curtime;
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}
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//* check last against first (needed because e.g. wday 1,4,7 has diff 1 not 3
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$prev_time = $used_times[0];
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$freq = ($prev_time - $min_entry) + ($max_entry - $curtime) + 1;
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if($min_freq == -1 || $freq < $min_freq) $min_freq = $freq;
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if($min_freq > 0 && $min_freq <= $max_entry) { //* only store if > 1 && < $max_entry!
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$min_freq = $min_freq * $in_minutes; // we have to overwrite $app->tform->cron_min_freq if this is higher value
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if(!$app->tform->cron_min_freq || $app->tform->cron_min_freq > $min_freq) $app->tform->cron_min_freq = $min_freq;
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}
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//return "DEBUG: " . $app->tform->cron_min_freq . " ($min_freq) --- " . var_export($used_times, true) . "<br />";
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}
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}
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