nextcloud/lib/private/updater.php

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<?php
/**
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* Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
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namespace OC;
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use OC\Hooks\BasicEmitter;
/**
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* Class that handles autoupdating of ownCloud
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*
* Hooks provided in scope \OC\Updater
* - maintenanceStart()
* - maintenanceEnd()
* - dbUpgrade()
* - failure(string $message)
*/
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class Updater extends BasicEmitter {
/**
* @var \OC\Log $log
*/
private $log;
private $simulateStepEnabled;
private $updateStepEnabled;
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/**
* @param \OC\Log $log
*/
public function __construct($log = null) {
$this->log = $log;
$this->simulateStepEnabled = true;
$this->updateStepEnabled = true;
}
/**
* Sets whether the database migration simulation must
* be enabled.
* This can be set to false to skip this test.
*
* @param bool $flag true to enable simulation, false otherwise
*/
public function setSimulateStepEnabled($flag) {
$this->simulateStepEnabled = $flag;
}
/**
* Sets whether the update must be performed.
* This can be set to false to skip the actual update.
*
* @param bool $flag true to enable update, false otherwise
*/
public function setUpdateStepEnabled($flag) {
$this->updateStepEnabled = $flag;
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}
/**
* Check if a new version is available
*
* @param string $updaterUrl the url to check, i.e. 'http://apps.owncloud.com/updater.php'
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* @return array|bool
*/
public function check($updaterUrl) {
// Look up the cache - it is invalidated all 30 minutes
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if ((\OC_Appconfig::getValue('core', 'lastupdatedat') + 1800) > time()) {
return json_decode(\OC_Appconfig::getValue('core', 'lastupdateResult'), true);
}
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\OC_Appconfig::setValue('core', 'lastupdatedat', time());
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if (\OC_Appconfig::getValue('core', 'installedat', '') == '') {
\OC_Appconfig::setValue('core', 'installedat', microtime(true));
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}
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$version = \OC_Util::getVersion();
$version['installed'] = \OC_Appconfig::getValue('core', 'installedat');
$version['updated'] = \OC_Appconfig::getValue('core', 'lastupdatedat');
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$version['updatechannel'] = \OC_Util::getChannel();
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$version['edition'] = \OC_Util::getEditionString();
$version['build'] = \OC_Util::getBuild();
$versionString = implode('x', $version);
//fetch xml data from updater
$url = $updaterUrl . '?version=' . $versionString;
// set a sensible timeout of 10 sec to stay responsive even if the update server is down.
$ctx = stream_context_create(
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array(
'http' => array(
'timeout' => 10
)
)
);
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$xml = @file_get_contents($url, 0, $ctx);
if ($xml == false) {
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return array();
}
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$loadEntities = libxml_disable_entity_loader(true);
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$data = @simplexml_load_string($xml);
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libxml_disable_entity_loader($loadEntities);
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$tmp = array();
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$tmp['version'] = $data->version;
$tmp['versionstring'] = $data->versionstring;
$tmp['url'] = $data->url;
$tmp['web'] = $data->web;
// Cache the result
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\OC_Appconfig::setValue('core', 'lastupdateResult', json_encode($data));
return $tmp;
}
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/**
* runs the update actions in maintenance mode, does not upgrade the source files
* except the main .htaccess file
*
* @return bool true if the operation succeeded, false otherwise
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*/
public function upgrade() {
\OC_DB::enableCaching(false);
\OC_Config::setValue('maintenance', true);
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$installedVersion = \OC_Config::getValue('version', '0.0.0');
$currentVersion = implode('.', \OC_Util::getVersion());
if ($this->log) {
$this->log->debug('starting upgrade from ' . $installedVersion . ' to ' . $currentVersion, array('app' => 'core'));
}
$this->emit('\OC\Updater', 'maintenanceStart');
try {
$this->doUpgrade($currentVersion, $installedVersion);
} catch (\Exception $exception) {
$this->emit('\OC\Updater', 'failure', array($exception->getMessage()));
}
\OC_Config::setValue('maintenance', false);
$this->emit('\OC\Updater', 'maintenanceEnd');
}
/**
* Whether an upgrade to a specified version is possible
* @param string $oldVersion
* @param string $newVersion
* @return bool
*/
public function isUpgradePossible($oldVersion, $newVersion) {
$oldVersion = explode('.', $oldVersion);
$newVersion = explode('.', $newVersion);
if($newVersion[0] > ($oldVersion[0] + 1) || $oldVersion[0] > $newVersion[0]) {
return false;
}
return true;
}
/**
* runs the update actions in maintenance mode, does not upgrade the source files
* except the main .htaccess file
*
* @param string $currentVersion current version to upgrade to
* @param string $installedVersion previous version from which to upgrade from
*
* @throws \Exception
* @return bool true if the operation succeeded, false otherwise
*/
private function doUpgrade($currentVersion, $installedVersion) {
// Stop update if the update is over several major versions
if (!self::isUpgradePossible($installedVersion, $currentVersion)) {
throw new \Exception('Updates between multiple major versions are unsupported.');
}
// Update htaccess files for apache hosts
if (isset($_SERVER['SERVER_SOFTWARE']) && strstr($_SERVER['SERVER_SOFTWARE'], 'Apache')) {
\OC_Setup::updateHtaccess();
}
// create empty file in data dir, so we can later find
// out that this is indeed an ownCloud data directory
// (in case it didn't exist before)
file_put_contents(\OC_Config::getValue('datadirectory', \OC::$SERVERROOT . '/data') . '/.ocdata', '');
// pre-upgrade repairs
$repair = new \OC\Repair(\OC\Repair::getBeforeUpgradeRepairSteps());
$repair->run();
// simulate DB upgrade
if ($this->simulateStepEnabled) {
$this->checkCoreUpgrade();
// simulate apps DB upgrade
$this->checkAppUpgrade($currentVersion);
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}
if ($this->updateStepEnabled) {
$this->doCoreUpgrade();
$disabledApps = \OC_App::checkAppsRequirements();
if (!empty($disabledApps)) {
$this->emit('\OC\Updater', 'disabledApps', array($disabledApps));
}
$this->doAppUpgrade();
// post-upgrade repairs
$repair = new \OC\Repair(\OC\Repair::getRepairSteps());
$repair->run();
//Invalidate update feed
\OC_Appconfig::setValue('core', 'lastupdatedat', 0);
// only set the final version if everything went well
\OC_Config::setValue('version', implode('.', \OC_Util::getVersion()));
}
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}
protected function checkCoreUpgrade() {
// simulate core DB upgrade
\OC_DB::simulateUpdateDbFromStructure(\OC::$SERVERROOT . '/db_structure.xml');
$this->emit('\OC\Updater', 'dbSimulateUpgrade');
}
protected function doCoreUpgrade() {
// do the real upgrade
\OC_DB::updateDbFromStructure(\OC::$SERVERROOT . '/db_structure.xml');
$this->emit('\OC\Updater', 'dbUpgrade');
}
/**
* @param string $version the oc version to check app compatibility with
*/
protected function checkAppUpgrade($version) {
$apps = \OC_App::getEnabledApps();
foreach ($apps as $appId) {
if ($version) {
$info = \OC_App::getAppInfo($appId);
$compatible = \OC_App::isAppCompatible($version, $info);
} else {
$compatible = true;
}
if ($compatible && \OC_App::shouldUpgrade($appId)) {
if (file_exists(\OC_App::getAppPath($appId) . '/appinfo/database.xml')) {
\OC_DB::simulateUpdateDbFromStructure(\OC_App::getAppPath($appId) . '/appinfo/database.xml');
}
}
}
$this->emit('\OC\Updater', 'appUpgradeCheck');
}
protected function doAppUpgrade() {
$apps = \OC_App::getEnabledApps();
foreach ($apps as $appId) {
if (\OC_App::shouldUpgrade($appId)) {
\OC_App::updateApp($appId);
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$this->emit('\OC\Updater', 'appUpgrade', array($appId, \OC_App::getAppVersion($appId)));
}
}
}
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}