MiscService::isBinaryFile() - Code Metrics - Inspection of "Pico CMS for Nextcloud v1.1 (WIP)" - nextcloud/cms_pico - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#99)

by Daniel

created 2020-04-13 10:20 UTC

MiscService::isBinaryFile() B

↳ Parent: MiscService

Complexity

Conditions	8
Paths	32

Size

Total Lines	29
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	10.3696

Importance

Changes

Metric	Value
eloc	15
c	0
b	0
f	0
dl	0
loc	29
ccs	10
cts	15
cp	0.6667
rs	8.4444
cc	8
nc	32
nop	1
crap	10.3696

<?php
/**
 * CMS Pico - Create websites using Pico CMS for Nextcloud.
 *
 * @copyright Copyright (c) 2017, Maxence Lange (<[email protected]>)
 * @copyright Copyright (c) 2019, Daniel Rudolf (<[email protected]>)
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace OCA\CMSPico\Service;

use OCA\CMSPico\AppInfo\Application;
use OCA\CMSPico\Exceptions\ComposerException;
use OCA\CMSPico\Exceptions\FilesystemNotWritableException;
use OCA\CMSPico\Files\FileInterface;
use OCP\Files\AlreadyExistsException;
use OCP\Files\GenericFileException;
use OCP\Files\InvalidPathException;
use OCP\Files\NotPermittedException;
use OCP\IL10N;
use OCP\Security\ISecureRandom;

class MiscService
{
	/** @var IL10N */
	private $l10n;

	/** @var ConfigService */
	private $configService;

	/** @var FileService */
	private $fileService;

	/** @var string[] */
	private $textFileMagic;

	/** @var string[] */
	private $binaryFileMagic;

	/**
	 * MiscService constructor.
	 *
	 * @param IL10N         $l10n
	 * @param ConfigService $configService
	 * @param FileService   $fileService
	 */
	public function __construct(IL10N $l10n, ConfigService $configService, FileService $fileService)
	{
		$this->l10n = $l10n;
		$this->configService = $configService;
		$this->fileService = $fileService;

		$this->textFileMagic = [
			hex2bin('EFBBBF'),
			hex2bin('0000FEFF'),
			hex2bin('FFFE0000'),
			hex2bin('FEFF'),
			hex2bin('FFFE')
		];

		$this->binaryFileMagic = [
			'%PDF',
			hex2bin('89') . 'PNG'
		];
	}

	/**
	 * @param string $path
	 *
	 * @return string
	 * @throws InvalidPathException
	 */
	public function normalizePath(string $path): string
	{
		$path = str_replace('\\', '/', $path);
		$pathParts = explode('/', $path);

		$resultParts = [];
		foreach ($pathParts as $pathPart) {
			if (($pathPart === '') || ($pathPart === '.')) {
				continue;
			} elseif ($pathPart === '..') {
				if (empty($resultParts)) {
					throw new InvalidPathException();
				}

				array_pop($resultParts);
				continue;
			}

			$resultParts[] = $pathPart;
		}

		return implode('/', $resultParts);
	}

	/**
	 * @param string      $path
	 * @param string|null $basePath
	 *
	 * @return string
	 * @throws InvalidPathException
	 */
	public function getRelativePath(string $path, string $basePath = null): string
	{
		if (!$basePath) {
			$basePath = \OC::$SERVERROOT;
		}

		$basePath = $this->normalizePath($basePath);
		$basePathLength = strlen($basePath);

		$path = $this->normalizePath($path);

		if ($path === $basePath) {
			return '';
		} elseif (substr($path, 0, $basePathLength + 1) === $basePath . '/') {
			return substr($path, $basePathLength + 1);
		} else {
			throw new InvalidPathException();
		}
	}

	/**
	 * @param string $path
	 * @param string $fileExtension
	 *
	 * @return false|string
	 * @throws InvalidPathException
	 */
	public function dropFileExtension(string $path, string $fileExtension): string
	{
		$fileName = basename($path);
		$fileExtensionPos = strrpos($fileName, '.');
		if (($fileExtensionPos === false) || (substr($fileName, $fileExtensionPos) !== $fileExtension)) {
			throw new InvalidPathException();
		}

		return substr($path, 0, strlen($path) - strlen($fileExtension));
	}

	/**
	 * @param FileInterface $file
	 *
	 * @return bool
	 * @throws NotPermittedException
	 * @throws GenericFileException
	 */
	public function isBinaryFile(FileInterface $file): bool
	{
		try {
			$buffer = file_get_contents($file->getLocalPath(), false, null, 0, 1024);
		} catch (\Exception $e) {
			$buffer = false;
		}

		if ($buffer === false) {
			$buffer = substr($file->getContent(), 0, 1024);
		}

		if ($buffer === '') {
			return false;
		}

		foreach ($this->textFileMagic as $textFileMagic) {
			if (substr_compare($buffer, $textFileMagic, 0, strlen($textFileMagic)) === 0) {
				return false;
			}
		}

		foreach ($this->binaryFileMagic as $binaryFileMagic) {
			if (substr_compare($buffer, $binaryFileMagic, 0, strlen($binaryFileMagic)) === 0) {
				return true;
			}
		}

		return (strpos($buffer, "\0") !== false);
	}

	/**
	 * @param int    $length
	 * @param string $prefix
	 * @param string $suffix
	 *
	 * @return string
	 */
	public function getRandom(int $length = 10, string $prefix = '', string $suffix = ''): string
	{
		$randomChars = ISecureRandom::CHAR_UPPER . ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_DIGITS;
		$random = \OC::$server->getSecureRandom()->generate($length, $randomChars);
		return ($prefix ? $prefix . '.' : '') . $random . ($suffix ? '.' . $suffix : '');
	}

	/**
	 * @throws ComposerException
	 */
	public function checkComposer(): void
	{
		$appPath = Application::getAppPath();
		if (!is_file($appPath . '/vendor/autoload.php')) {
			try {
				$relativeAppPath = $this->getRelativePath($appPath) . '/';
			} catch (InvalidPathException $e) {
				$relativeAppPath = 'apps/' . Application::APP_NAME . '/';
			}

			throw new ComposerException($this->l10n->t(
				'Failed to enable Pico CMS for Nextcloud: Couldn\'t find "%s". Make sure to install the app\'s '
				. 'dependencies by executing `composer install` in the app\'s install directory below "%s". '
				. 'Then try again enabling Pico CMS for Nextcloud.',
				[ $relativeAppPath . 'vendor/autoload.php', $relativeAppPath ]
			));
		}
	}

	/**
	 * @throws FilesystemNotWritableException
	 */
	public function checkPublicFolder(): void
	{
		$publicFolder = $this->fileService->getPublicFolder();

		try {
			try {
				$publicThemesFolder = $publicFolder->newFolder(PicoService::DIR_THEMES);
			} catch (AlreadyExistsException $e) {
				$publicThemesFolder = $publicFolder->getFolder(PicoService::DIR_THEMES);
			}

			$publicThemesTestFileName = $this->getRandom(10, 'tmp', Application::APP_NAME . '-test');
			$publicThemesTestFile = $publicThemesFolder->newFile($publicThemesTestFileName);
			$publicThemesTestFile->delete();

			try {
				$publicPluginsFolder = $publicFolder->newFolder(PicoService::DIR_PLUGINS);
			} catch (AlreadyExistsException $e) {
				$publicPluginsFolder = $publicFolder->getFolder(PicoService::DIR_PLUGINS);
			}

			$publicPluginsTestFileName = $this->getRandom(10, 'tmp', Application::APP_NAME . '-test');
			$publicPluginsTestFile = $publicPluginsFolder->newFile($publicPluginsTestFileName);
			$publicPluginsTestFile->delete();
		} catch (NotPermittedException $e) {
			try {
				$appDataPublicPath = Application::getAppPath() . '/appdata_public';
				$appDataPublicPath = $this->getRelativePath($appDataPublicPath) . '/';
			} catch (InvalidPathException $e) {
				$appDataPublicPath = 'apps/' . Application::APP_NAME . '/appdata_public/';
			}

			try {
				$dataPath = $this->configService->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data');
				$dataPath = $this->getRelativePath($dataPath) . '/';
			} catch (InvalidPathException $e) {
				$dataPath = 'data/';
			}

			throw new FilesystemNotWritableException($this->l10n->t(
				'Failed to enable Pico CMS for Nextcloud: The webserver has no permission to create files and '
				. 'folders below "%s". Make sure to give the webserver write access to this directory by '
				. 'changing its permissions and ownership to the same as of your "%s" directory. Then try '
				. 'again enabling Pico CMS for Nextcloud.',
				[ $appDataPublicPath, $dataPath ]
			));
		}
	}
}


1		<?php
2		/**
3		* CMS Pico - Create websites using Pico CMS for Nextcloud.
4		*
5		* @copyright Copyright (c) 2017, Maxence Lange (<[email protected]>)
6		* @copyright Copyright (c) 2019, Daniel Rudolf (<[email protected]>)
7		*
8		* @license GNU AGPL version 3 or any later version
9		*
10		* This program is free software: you can redistribute it and/or modify
11		* it under the terms of the GNU Affero General Public License as
12		* published by the Free Software Foundation, either version 3 of the
13		* License, or (at your option) any later version.
14		*
15		* This program is distributed in the hope that it will be useful,
16		* but WITHOUT ANY WARRANTY; without even the implied warranty of
17		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18		* GNU Affero General Public License for more details.
19		*
20		* You should have received a copy of the GNU Affero General Public License
21		* along with this program. If not, see <http://www.gnu.org/licenses/>.
22		*/
23
24		namespace OCA\CMSPico\Service;
25
26		use OCA\CMSPico\AppInfo\Application;
27		use OCA\CMSPico\Exceptions\ComposerException;
28		use OCA\CMSPico\Exceptions\FilesystemNotWritableException;
29		use OCA\CMSPico\Files\FileInterface;
30		use OCP\Files\AlreadyExistsException;
31		use OCP\Files\GenericFileException;
32		use OCP\Files\InvalidPathException;
33		use OCP\Files\NotPermittedException;
34		use OCP\IL10N;
35		use OCP\Security\ISecureRandom;
36
37		class MiscService
38		{
39		/** @var IL10N */
40		private $l10n;
41
42		/** @var ConfigService */
43		private $configService;
44
45		/** @var FileService */
46		private $fileService;
47
48		/** @var string[] */
49		private $textFileMagic;
50
51		/** @var string[] */
52		private $binaryFileMagic;
53
54		/**
55		* MiscService constructor.
56		*
57		* @param IL10N $l10n
58		* @param ConfigService $configService
59		* @param FileService $fileService
60		*/
61	1	public function __construct(IL10N $l10n, ConfigService $configService, FileService $fileService)
62		{
63	1	$this->l10n = $l10n;
64	1	$this->configService = $configService;
65	1	$this->fileService = $fileService;
66
67	1	$this->textFileMagic = [
68	1	hex2bin('EFBBBF'),
69	1	hex2bin('0000FEFF'),
70	1	hex2bin('FFFE0000'),
71	1	hex2bin('FEFF'),
72	1	hex2bin('FFFE')
73		];
74
75	1	$this->binaryFileMagic = [
76	1	'%PDF',
77	1	hex2bin('89') . 'PNG'
78		];
79	1	}
80
81		/**
82		* @param string $path
83		*
84		* @return string
85		* @throws InvalidPathException
86		*/
87	7	public function normalizePath(string $path): string
88		{
89	7	$path = str_replace('\\', '/', $path);
90	7	$pathParts = explode('/', $path);
91
92	7	$resultParts = [];
93	7	foreach ($pathParts as $pathPart) {
94	7	if (($pathPart === '') \|\| ($pathPart === '.')) {
95	7	continue;
96	7	} elseif ($pathPart === '..') {
97		if (empty($resultParts)) {
98		throw new InvalidPathException();
99		}
100
101		array_pop($resultParts);
102		continue;
103		}
104
105	7	$resultParts[] = $pathPart;
106		}
107
108	7	return implode('/', $resultParts);
109		}
110
111		/**
112		* @param string $path
113		* @param string\|null $basePath
114		*
115		* @return string
116		* @throws InvalidPathException
117		*/
118	2	public function getRelativePath(string $path, string $basePath = null): string
119		{
120	2	if (!$basePath) {
121		$basePath = \OC::$SERVERROOT;
122		}
123
124	2	$basePath = $this->normalizePath($basePath);
125	2	$basePathLength = strlen($basePath);
126
127	2	$path = $this->normalizePath($path);
128
129	2	if ($path === $basePath) {
130		return '';
131	2	} elseif (substr($path, 0, $basePathLength + 1) === $basePath . '/') {
132	2	return substr($path, $basePathLength + 1);
133		} else {
134	2	throw new InvalidPathException();
135		}
136		}
137
138		/**
139		* @param string $path
140		* @param string $fileExtension
141		*
142		* @return false\|string
143		* @throws InvalidPathException
144		*/
145	2	public function dropFileExtension(string $path, string $fileExtension): string
146		{
147	2	$fileName = basename($path);
148	2	$fileExtensionPos = strrpos($fileName, '.');
149	2	if (($fileExtensionPos === false) \|\| (substr($fileName, $fileExtensionPos) !== $fileExtension)) {
150		throw new InvalidPathException();
151		}
152
153	2	return substr($path, 0, strlen($path) - strlen($fileExtension));
154		}
155
156		/**
157		* @param FileInterface $file
158		*
159		* @return bool
160		* @throws NotPermittedException
161		* @throws GenericFileException
162		*/
163	3	public function isBinaryFile(FileInterface $file): bool
164		{
165		try {
166	3	$buffer = file_get_contents($file->getLocalPath(), false, null, 0, 1024);
167		} catch (\Exception $e) {
168		$buffer = false;
169		}
170
171	3	if ($buffer === false) {
172		$buffer = substr($file->getContent(), 0, 1024);
173		}
174
175	3	if ($buffer === '') {
176		return false;
177		}
178
179	3	foreach ($this->textFileMagic as $textFileMagic) {
180	3	if (substr_compare($buffer, $textFileMagic, 0, strlen($textFileMagic)) === 0) {
181		return false;
182		}
183		}
184
185	3	foreach ($this->binaryFileMagic as $binaryFileMagic) {
186	3	if (substr_compare($buffer, $binaryFileMagic, 0, strlen($binaryFileMagic)) === 0) {
187	3	return true;
188		}
189		}
190
191	3	return (strpos($buffer, "\0") !== false);
192		}
193
194		/**
195		* @param int $length
196		* @param string $prefix
197		* @param string $suffix
198		*
199		* @return string
200		*/
201	1	public function getRandom(int $length = 10, string $prefix = '', string $suffix = ''): string
202		{
203	1	$randomChars = ISecureRandom::CHAR_UPPER . ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_DIGITS;
204	1	$random = \OC::$server->getSecureRandom()->generate($length, $randomChars);
205	1	return ($prefix ? $prefix . '.' : '') . $random . ($suffix ? '.' . $suffix : '');
206		}
207
208		/**
209		* @throws ComposerException
210		*/
211		public function checkComposer(): void
212		{
213		$appPath = Application::getAppPath();
214		if (!is_file($appPath . '/vendor/autoload.php')) {
215		try {
216		$relativeAppPath = $this->getRelativePath($appPath) . '/';
217		} catch (InvalidPathException $e) {
218		$relativeAppPath = 'apps/' . Application::APP_NAME . '/';
219		}
220
221		throw new ComposerException($this->l10n->t(
222		'Failed to enable Pico CMS for Nextcloud: Couldn\'t find "%s". Make sure to install the app\'s '
223		. 'dependencies by executing `composer install` in the app\'s install directory below "%s". '
224		. 'Then try again enabling Pico CMS for Nextcloud.',
225		[ $relativeAppPath . 'vendor/autoload.php', $relativeAppPath ]
226		));
227		}
228		}
229
230		/**
231		* @throws FilesystemNotWritableException
232		*/
233		public function checkPublicFolder(): void
234		{
235		$publicFolder = $this->fileService->getPublicFolder();
236
237		try {
238		try {
239		$publicThemesFolder = $publicFolder->newFolder(PicoService::DIR_THEMES);
240		} catch (AlreadyExistsException $e) {
241		$publicThemesFolder = $publicFolder->getFolder(PicoService::DIR_THEMES);
242		}
243
244		$publicThemesTestFileName = $this->getRandom(10, 'tmp', Application::APP_NAME . '-test');
245		$publicThemesTestFile = $publicThemesFolder->newFile($publicThemesTestFileName);
246		$publicThemesTestFile->delete();
247
248		try {
249		$publicPluginsFolder = $publicFolder->newFolder(PicoService::DIR_PLUGINS);
250		} catch (AlreadyExistsException $e) {
251		$publicPluginsFolder = $publicFolder->getFolder(PicoService::DIR_PLUGINS);
252		}
253
254		$publicPluginsTestFileName = $this->getRandom(10, 'tmp', Application::APP_NAME . '-test');
255		$publicPluginsTestFile = $publicPluginsFolder->newFile($publicPluginsTestFileName);
256		$publicPluginsTestFile->delete();
257		} catch (NotPermittedException $e) {
258		try {
259		$appDataPublicPath = Application::getAppPath() . '/appdata_public';
260		$appDataPublicPath = $this->getRelativePath($appDataPublicPath) . '/';
261		} catch (InvalidPathException $e) {
262		$appDataPublicPath = 'apps/' . Application::APP_NAME . '/appdata_public/';
263		}
264
265		try {
266		$dataPath = $this->configService->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data');
267		$dataPath = $this->getRelativePath($dataPath) . '/';
268		} catch (InvalidPathException $e) {
269		$dataPath = 'data/';
270		}
271
272		throw new FilesystemNotWritableException($this->l10n->t(
273		'Failed to enable Pico CMS for Nextcloud: The webserver has no permission to create files and '
274		. 'folders below "%s". Make sure to give the webserver write access to this directory by '
275		. 'changing its permissions and ownership to the same as of your "%s" directory. Then try '
276		. 'again enabling Pico CMS for Nextcloud.',
277		[ $appDataPublicPath, $dataPath ]
278		));
279		}
280		}
281		}
282

nextcloud / cms_pico

Pull Request — master (#99)

MiscService::isBinaryFile() B

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