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<?php |
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/** |
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* @author Victor Dubiniuk <[email protected]> |
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* |
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* @copyright Copyright (c) 2015, ownCloud, Inc. |
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* @license AGPL-3.0 |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace Owncloud\Updater\Controller; |
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use Owncloud\Updater\Utils\Fetcher; |
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use Owncloud\Updater\Utils\Registry; |
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use Owncloud\Updater\Utils\FilesystemHelper; |
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class DownloadController { |
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/** |
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* @var Fetcher |
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*/ |
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protected $fetcher; |
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/** |
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* @var Registry |
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*/ |
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protected $registry; |
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/** |
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* @var FilesystemHelper |
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*/ |
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protected $fsHelper; |
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public function __construct(Fetcher $fetcher, Registry $registry, FilesystemHelper $fsHelper){ |
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$this->fetcher = $fetcher; |
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$this->registry = $registry; |
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$this->fsHelper = $fsHelper; |
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} |
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public function checkFeed(){ |
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$response = $this->getDefaultResponse(); |
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try { |
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$feed = $this->fetcher->getFeed(); |
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if ($feed->isValid()){ |
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$response['success'] = true; |
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$response['data']['feed'] = $feed; |
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} |
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} catch (\Exception $e){ |
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$response['exception'] = $e; |
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} |
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return $response; |
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} |
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public function downloadOwncloud($progressCallback = null){ |
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$response = $this->getDefaultResponse(); |
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if (is_null($progressCallback)){ |
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$progressCallback = function (){}; |
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} |
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try { |
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$feed = $this->getFeed(); |
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// Fixme: Daily channel has no checksum |
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$isDailyChannel = $this->fetcher->getUpdateChannel() == 'daily'; |
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if (!$isDailyChannel){ |
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$md5 = $this->fetcher->getMd5($feed); |
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} |
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$path = $this->fetcher->getBaseDownloadPath($feed); |
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if ($isDailyChannel){ |
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$this->fsHelper->removeIfExists($path); |
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} |
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if ($isDailyChannel || !$this->checkIntegrity($path, $md5)){ |
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$this->fetcher->getOwncloud($feed, $progressCallback); |
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} |
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if ($isDailyChannel || $this->checkIntegrity($path, $md5)){ |
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$response['success'] = true; |
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$response['data']['path'] = $path; |
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} else { |
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$response['exception'] = new \Exception('Deleted ' . $feed->getDownloadedFileName() . ' due to wrong checksum'); |
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} |
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} catch (\Exception $e) { |
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if (isset($path)){ |
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$this->fsHelper->removeIfExists($path); |
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} |
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$response['exception'] = $e; |
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} |
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return $response; |
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} |
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/** |
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* Check if package is not corrupted on download |
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* @param string $path |
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* @param string $md5 |
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* @return boolean |
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*/ |
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protected function checkIntegrity($path, $md5){ |
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$fileExists = $this->fsHelper->fileExists($path); |
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$checksumMatch = $md5 === $this->fsHelper->md5File($path); |
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if ($fileExists && !$checksumMatch){ |
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$this->fsHelper->removeIfExists($path); |
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$fileExists = false; |
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} |
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return $fileExists; |
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} |
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/** |
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* Get a Feed instance |
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* @param bool $useCache |
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* @return \Owncloud\Updater\Utils\Feed |
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*/ |
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protected function getFeed($useCache = true){ |
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if ($useCache && !is_null($this->registry->get('feed'))){ |
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return $this->registry->get('feed'); |
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} |
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return $this->fetcher->getFeed(); |
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} |
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/** |
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* Init response array |
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* @return array |
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*/ |
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protected function getDefaultResponse(){ |
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return [ |
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'success' => false, |
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'exception' => '', |
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'details' => '', |
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'data' => [] |
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]; |
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} |
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} |
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owncloud /
updater
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: