/administrator/components/com_akeeba/models/confwiz.php
PHP | 487 lines | 305 code | 55 blank | 127 comment | 75 complexity | cb177110bf7aa1194963a0e52ae3ce9c MD5 | raw file
Possible License(s): GPL-2.0, LGPL-3.0, BSD-3-Clause, LGPL-2.1, GPL-3.0
- <?php
- /**
- * @package AkeebaBackup
- * @copyright Copyright (c)2009-2012 Nicholas K. Dionysopoulos
- * @license GNU General Public License version 3, or later
- * @since 1.3
- */
- // Protect from unauthorized access
- defined('_JEXEC') or die();
- /**
- * The Configuration Wizard model class
- */
- class AkeebaModelConfwiz extends FOFModel
- {
-
- /**
- * Attempts to automatically figure out where on Earth the output and
- * temporary directories should point, adjusting their permissions should
- * it be necessary.
- *
- * @param $dontRecurse int Used internally. Always skip this parameter when calling this method.
- * @return bool True if we could fix the directories
- */
- public function autofixDirectories( $dontRecurse = 0 )
- {
- // Get the profile ID
- $profile_id = AEPlatform::getInstance()->get_active_profile();
- // Get the output and temporary directory
- $aeconfig = AEFactory::getConfiguration();
- $outdir = $aeconfig->get('akeeba.basic.output_directory','');
-
- $fixTemp = false; $fixOut = false;
- if(is_dir($outdir)) {
- // Test the writability of the directory
- $filename = $outdir.'/test.dat';
- $fixOut = !@file_put_contents($filename,'test');
- if(!$fixOut) {
- // Directory writable, remove the temp file
- @unlink($filename);
- } else {
- // Try to chmod the directory
- $this->chmod($outdir, 511);
- // Repeat the test
- $fixOut = !@file_put_contents($filename,'test');
- if(!$fixOut) {
- // Directory writable, remove the temp file
- @unlink($filename);
- }
- }
- } else {
- $fixOut = true;
- }
-
- // Do I have to fix the output directory?
- if($fixOut && ($dontRecurse < 1)) {
- $aeconfig->set('akeeba.basic.output_directory','[DEFAULT_OUTPUT]');
- AEPlatform::getInstance()->save_configuration($profile_id);
- // After fixing the directory, run ourselves again
- return $this->autofixDirectories(1);
- } elseif($fixOut) {
- // If we reached this point after recursing, we can't fix the permissions
- // and the user has to RTFM and fix the issue!
- return false;
- }
- return true;
- }
-
- /**
- * Creates a temporary file of a specific size
- * @param $blocks int How many 128Kb blocks to write. Common values: 1, 2, 4, 16, 40, 80, 81
- * @param $tempdir
- * @return unknown_type
- */
- public function createTempFile($blocks = 1, $tempdir = null)
- {
- if(empty($tempdir)) {
- $aeconfig = AEFactory::getConfiguration();
- $tempdir = $aeconfig->get('akeeba.basic.output_directory','');
- }
-
- $sixtyfourBytes = '012345678901234567890123456789012345678901234567890123456789ABCD';
- $oneKilo = ''; $oneBlock = '';
- for($i = 0; $i < 16; $i++) $oneKilo .= $sixtyfourBytes;
- for($i = 0; $i < 128; $i++) $oneBlock .= $oneKilo;
-
- $filename = $tempdir.'/test.dat';
- @unlink($filename);
- $fp = @fopen($filename, 'w');
- if($fp !== false) {
- for($i = 0; $i < $blocks; $i++) {
- if(!@fwrite($fp, $oneBlock)) {
- @fclose($fp);
- @unlink($filename);
- return false;
- }
- }
- @fclose($fp);
- @unlink($filename);
- } else {
- return false;
- }
-
- return true;
- }
-
-
- /**
- * Sleeps for a given amount of time. Returns false if the sleep time requested is over
- * the maximum execution time.
- * @param $secondsDelay int Seconds to sleep
- * @return bool
- */
- public function doNothing($secondsDelay = 1)
- {
- // Try to get the maximum execution time and PHP memory limit
- if(function_exists('ini_get')) {
- $maxexec = ini_get("max_execution_time");
- $memlimit = ini_get("memory_limit");
- } else {
- $maxexec = 14;
- $memlimit = 16777216;
- }
-
- if(!is_numeric($maxexec) || ($maxexec == 0)) $maxexec = 10; // Unknown time limit; suppose 10s
- if($maxexec > 180) $maxexec = 10; // Some servers report silly values, i.e. 30000, which Do Not Work??? :(
- // Sometimes memlimit comes with the M or K suffixes. Parse them.
- if(is_string($memlimit)) {
- $memlimit = strtoupper(trim(str_replace(' ','',$memlimit)));
- if( substr($memlimit,-1) == 'K' ) {
- $memlimit = 1024 * substr($memlimit, 0, -1);
- } elseif( substr($memlimit,-1) == 'M' ) {
- $memlimit = 1024 * 1024 * substr($memlimit, 0, -1);
- } elseif( substr($memlimit,-1) == 'G' ) {
- $memlimit = 1024 * 1024 * 1024 * substr($memlimit, 0, -1);
- }
- }
- if(!is_numeric($memlimit) || ($memlimit === 0)) $memlimit = 16777216; // Unknown limit; suppose 16M
- if($memlimit === -1) $memlimit = 134217728; // No limit; suppose 128M
- // Get the current memory usage (or assume one if the metric is not available)
- if(function_exists('memory_get_usage')) {
- $usedram = memory_get_usage();
- } else {
- $usedram = 7340032; // Suppose 7M of RAM usage if the metric isn't available;
- }
-
- // If we have less than 12M of RAM left, we have to limit ourselves to 6 seconds of
- // total execution time (emperical value!) to avoid deadly memory outages
- if( ($memlimit - $usedram) < 12582912 ) {
- $maxexec = 5;
- }
-
- // If the requested delay is over the $maxexec limit (minus one second
- // for application initialization), return false
- if($secondsDelay > ($maxexec - 1)) return false;
- // And now, run the silly loop to simulate the CPU usage pattern during backup
- $start = microtime(true);
- $loop = true;
- while($loop) {
- // Waste some CPU power...
- for($i = 1; $i < 1000; $i++) {
- $j = exp(($i * $i / 123 * 864) >> 2);
- }
- // ... then sleep for a millisec
- usleep(1000);
- // Are we done yet?
- $end = microtime(true);
- if( ($end - $start) >= $secondsDelay ) $loop = false;
- }
- return true;
- }
-
- /**
- * This method will analyze your database tables and try to figure out the optimal
- * batch row count value so that its select doesn't return excessive amounts of data.
- * The only drawback is that it only accounts for the core tables, but that is usually
- * a good metric.
- */
- public function analyzeDatabase()
- {
- // Try to get the PHP memory limit
- if(function_exists('ini_get')) {
- $memlimit = ini_get("memory_limit");
- } else {
- $memlimit = 16777216;
- }
- if(!is_numeric($memlimit) || ($memlimit === 0)) $memlimit = 16777216; // Unknown limit; suppose 16M
- if($memlimit === -1) $memlimit = 134217728; // No limit; suppose 128M
-
- // Get the current memory usage (or assume one if the metric is not available)
- if(function_exists('memory_get_usage')) {
- $usedram = memory_get_usage();
- } else {
- $usedram = 7340032; // Suppose 7M of RAM usage if the metric isn't available;
- }
-
- // How much RAM can I spare? It's the max memory minus the current memory usage and an extra
- // 5Mb to cater for Akeeba Engine's peak memory usage
- $max_mem_usage = $usedram + 5242880;
- $ram_allowance = $memlimit - $max_mem_usage;
- // If the RAM allowance is too low, assume 2Mb (emperical value)
- if($ram_allowance < 2097152) $ram_allowance = 2097152;
-
- $rowCount = 100;
-
- // Get the table statistics
- $db = $this->getDBO();
- if(strtolower(substr($db->name,0,5)) == 'mysql') {
- // The table analyzer only works with MySQL
- $db->setQuery( "SHOW TABLE STATUS" );
- $metrics = $db->loadAssocList();
- if($db->getError()) {
- // SHOW TABLE STATUS is not supported. I'll assume a safe-ish value of 100 rows
- $rowCount = 100;
- } else {
- $rowCount = 1000; // Start with the default value
- if(!empty($metrics)) {
- foreach($metrics as $table) {
- // Get row count and average row length
- $rows = $table['Rows'];
- $avg_len = $table['Avg_row_length'];
- // Calculate RAM usage with current settings
- $max_rows = min($rows, $rowCount);
- $max_ram_current = $max_rows * $avg_len;
- if($max_ram_current > $ram_allowance) {
- // Hm... over the allowance. Let's try to find a sweet spot.
- $max_rows = (int)($ram_allowance / $avg_len);
- // Quantize to multiple of 10 rows
- $max_rows = 10 * floor($max_rows / 10);
- // Can't really go below 10 rows / batch
- if($max_rows < 10) $max_rows = 10;
- // If the new setting is less than the current $rowCount, use the new setting
- if($rowCount > $max_rows) $rowCount = $max_rows;
- }
- }
- }
- }
- }
-
- $profile_id = AEPlatform::getInstance()->get_active_profile();
- $config = AEFactory::getConfiguration();
- // Save the row count per batch
- $config->set('engine.dump.common.batchsize',$rowCount);
- // Enable SQL file splitting - default is 512K unless the part_size is less than that!
- $splitsize = 524288;
- $partsize = $config->get('engine.archiver.common.part_size',0);
- if( ($partsize < $splitsize) && !empty($partsize) ) $splitsize = $partsize;
- $config->set('engine.dump.common.splitsize',$splitsize);
- // Enable extended INSERTs
- $config->set('engine.dump.common.extended_inserts','1');
- // Determine optimal packet size (must be at most two fifths of the split size and no more than 256K)
- $packet_size = (int)$splitsize * 0.4;
- if($packet_size > 262144) $packet_size = 262144;
- $config->set('engine.dump.common.packet_size',$packet_size);
- // Enable the native dump engine
- $config->set('akeeba.advanced.dump_engine','native');
-
- AEPlatform::getInstance()->save_configuration($profile_id);
- }
-
- /**
- * Changes the permissions of a file or directory using direct file access or
- * Joomla!'s FTP layer, whichever works
- * @param $path string Absolute path to the file/dir to chmod
- * @param $mode The permissions mode to apply
- * @return bool True on success
- */
- private function chmod($path, $mode)
- {
- if(is_string($mode))
- {
- $mode = octdec($mode);
- }
- // Initialize variables
- jimport('joomla.client.helper');
- $ftpOptions = JClientHelper::getCredentials('ftp');
- // Check to make sure the path valid and clean
- $path = JPath::clean($path);
- if ($ftpOptions['enabled'] == 1) {
- // Connect the FTP client
- jimport('joomla.client.ftp');
- if(version_compare(JVERSION,'3.0','ge')) {
- $ftp = JClientFTP::getInstance(
- $ftpOptions['host'], $ftpOptions['port'], null,
- $ftpOptions['user'], $ftpOptions['pass']
- );
- } else {
- $ftp = JFTP::getInstance(
- $ftpOptions['host'], $ftpOptions['port'], null,
- $ftpOptions['user'], $ftpOptions['pass']
- );
- }
- }
- if(@chmod($path, $mode))
- {
- $ret = true;
- } elseif ($ftpOptions['enabled'] == 1) {
- // Translate path and delete
- jimport('joomla.client.ftp');
- $path = JPath::clean(str_replace(JPATH_ROOT, $ftpOptions['root'], $path), '/');
- // FTP connector throws an error
- $ret = $ftp->chmod($path, $mode);
- } else {
- return false;
- }
- }
-
- public function runAjax()
- {
- $act = $this->getState('act');
-
- if(method_exists($this, $act)) {
- $result = $this->$act();
- } else {
- $result = false;
- }
-
- return $result;
- }
-
- private function ping()
- {
- return true;
- }
-
- /**
- * Try different values of minimum execution time
- */
- private function minexec()
- {
- $seconds = FOFInput::getFloat('seconds', '0.5', $this->input);
- if ($seconds < 1) {
- usleep($seconds*1000000);
- } else {
- sleep($seconds);
- }
- return true;
- }
-
- /**
- * Saves the AJAX preference and the minimum execution time
- * @return bool
- */
- private function applyminexec()
- {
- // Get the user parameters
- $iframes = FOFInput::getInt('iframes', 0, $this->input);
- $minexec = FOFInput::getFloat('minecxec', 2.0, $this->input);
-
- // Save the settings
- $profile_id = AEPlatform::getInstance()->get_active_profile();
- $config = AEFactory::getConfiguration();
- $config->set('akeeba.basic.useiframe', $iframes);
- $config->set('akeeba.tuning.min_exec_time', $minexec * 1000);
- AEPlatform::getInstance()->save_configuration($profile_id);
-
- // Enforce the min exec time
- $timer = AEFactory::getTimer();
- $timer->enforce_min_exec_time(false);
-
- // Done!
- return true;
- }
-
- /**
- * Try to make the directories writable or provide a set of writable directories
- * @return bool
- */
- private function directories()
- {
- $timer = AEFactory::getTimer();
- if(interface_exists('JModel')) {
- $model = JModelLegacy::getInstance('Confwiz','AkeebaModel');
- } else {
- $model = JModel::getInstance('Confwiz','AkeebaModel');
- }
- $result = $model->autofixDirectories();
- $timer->enforce_min_exec_time(false);
- return $result;
- }
-
- /**
- * Analyze the database and apply optimized database dump settings
- * @return bool
- */
- private function database()
- {
- $timer = AEFactory::getTimer();
- if(interface_exists('JModel')) {
- $model = JModelLegacy::getInstance('Confwiz','AkeebaModel');
- } else {
- $model = JModel::getInstance('Confwiz','AkeebaModel');
- }
- $model->analyzeDatabase();
- $timer->enforce_min_exec_time(false);
- return true;
- }
-
- /**
- * Try to apply a specific maximum execution time setting
- * @return bool
- */
- private function maxexec()
- {
- $seconds = FOFInput::getInt('seconds', 30, $this->input);
- $timer = AEFactory::getTimer();
- if(interface_exists('JModel')) {
- $model = JModelLegacy::getInstance('Confwiz','AkeebaModel');
- } else {
- $model = JModel::getInstance('Confwiz','AkeebaModel');
- }
- $result = $model->doNothing($seconds);
- $timer->enforce_min_exec_time(false);
- return $result;
- }
-
- /**
- * Save a specific maximum execution time preference to the database
- * @return bool
- */
- private function applymaxexec()
- {
- // Get the user parameters
- $maxexec = FOFInput::getInt('seconds', 2, $this->input);
-
- // Save the settings
- $timer = AEFactory::getTimer();
- $profile_id = AEPlatform::getInstance()->get_active_profile();
- $config = AEFactory::getConfiguration();
- $config->set('akeeba.tuning.max_exec_time', $maxexec);
- $config->set('akeeba.tuning.run_time_bias','75');
- $config->set('akeeba.advanced.scan_engine', 'smart');
- // @todo This should be an option (choose format, zip/jpa)
- $config->set('akeeba.advanced.archiver_engine', 'jpa');
- AEPlatform::getInstance()->save_configuration($profile_id);
-
- // Enforce the min exec time
- $timer->enforce_min_exec_time(false);
-
- // Done!
- return true;
- }
- /**
- * Creates a dummy file of a given size. Remember to give the filesize
- * query parameter in bytes!
- */
- public function partsize()
- {
- $timer = AEFactory::getTimer();
- $blocks = FOFInput::getInt('blocks', 1, $this->input);
-
- if(interface_exists('JModel')) {
- $model = JModelLegacy::getInstance('Confwiz','AkeebaModel');
- } else {
- $model = JModel::getInstance('Confwiz','AkeebaModel');
- }
- $result = $model->createTempFile($blocks);
- if($result) {
- // Save the setting
- if($blocks > 200) $blocks = 16383; // Over 25Mb = 2Gb minus 128Kb limit (safe setting for PHP not running on 64-bit Linux)
- $profile_id = AEPlatform::getInstance()->get_active_profile();
- $config = AEFactory::getConfiguration();
- $config->set('engine.archiver.common.part_size', $blocks * 128 * 1024);
- AEPlatform::getInstance()->save_configuration($profile_id);
- }
- // Enforce the min exec time
- $timer->enforce_min_exec_time(false);
-
- return $result;
- }
- }