nextcloud / server

lib/private/legacy/OC_Helper.php

Indentation +569 added lines, -569 removed lines

@@ -52,573 +52,573 @@
  * Collection of useful functions
  */
 class OC_Helper {
-	private static $templateManager;
-
-	/**
-	 * Make a human file size
-	 * @param int $bytes file size in bytes
-	 * @return string a human readable file size
-	 *
-	 * Makes 2048 to 2 kB.
-	 */
-	public static function humanFileSize($bytes) {
-		if ($bytes < 0) {
-			return "?";
-		}
-		if ($bytes < 1024) {
-			return "$bytes B";
-		}
-		$bytes = round($bytes / 1024, 0);
-		if ($bytes < 1024) {
-			return "$bytes KB";
-		}
-		$bytes = round($bytes / 1024, 1);
-		if ($bytes < 1024) {
-			return "$bytes MB";
-		}
-		$bytes = round($bytes / 1024, 1);
-		if ($bytes < 1024) {
-			return "$bytes GB";
-		}
-		$bytes = round($bytes / 1024, 1);
-		if ($bytes < 1024) {
-			return "$bytes TB";
-		}
-
-		$bytes = round($bytes / 1024, 1);
-		return "$bytes PB";
-	}
-
-	/**
-	 * Make a computer file size
-	 * @param string $str file size in human readable format
-	 * @return float|bool a file size in bytes
-	 *
-	 * Makes 2kB to 2048.
-	 *
-	 * Inspired by: https://www.php.net/manual/en/function.filesize.php#92418
-	 */
-	public static function computerFileSize($str) {
-		$str = strtolower($str);
-		if (is_numeric($str)) {
-			return (float)$str;
-		}
-
-		$bytes_array = [
-			'b' => 1,
-			'k' => 1024,
-			'kb' => 1024,
-			'mb' => 1024 * 1024,
-			'm' => 1024 * 1024,
-			'gb' => 1024 * 1024 * 1024,
-			'g' => 1024 * 1024 * 1024,
-			'tb' => 1024 * 1024 * 1024 * 1024,
-			't' => 1024 * 1024 * 1024 * 1024,
-			'pb' => 1024 * 1024 * 1024 * 1024 * 1024,
-			'p' => 1024 * 1024 * 1024 * 1024 * 1024,
-		];
-
-		$bytes = (float)$str;
-
-		if (preg_match('#([kmgtp]?b?)$#si', $str, $matches) && !empty($bytes_array[$matches[1]])) {
-			$bytes *= $bytes_array[$matches[1]];
-		} else {
-			return false;
-		}
-
-		$bytes = round($bytes);
-
-		return $bytes;
-	}
-
-	/**
-	 * Recursive copying of folders
-	 * @param string $src source folder
-	 * @param string $dest target folder
-	 *
-	 */
-	public static function copyr($src, $dest) {
-		if (is_dir($src)) {
-			if (!is_dir($dest)) {
-				mkdir($dest);
-			}
-			$files = scandir($src);
-			foreach ($files as $file) {
-				if ($file != "." && $file != "..") {
-					self::copyr("$src/$file", "$dest/$file");
-				}
-			}
-		} elseif (file_exists($src) && !\OC\Files\Filesystem::isFileBlacklisted($src)) {
-			copy($src, $dest);
-		}
-	}
-
-	/**
-	 * Recursive deletion of folders
-	 * @param string $dir path to the folder
-	 * @param bool $deleteSelf if set to false only the content of the folder will be deleted
-	 * @return bool
-	 */
-	public static function rmdirr($dir, $deleteSelf = true) {
-		if (is_dir($dir)) {
-			$files = new RecursiveIteratorIterator(
-				new RecursiveDirectoryIterator($dir, RecursiveDirectoryIterator::SKIP_DOTS),
-				RecursiveIteratorIterator::CHILD_FIRST
-			);
-
-			foreach ($files as $fileInfo) {
-				/** @var SplFileInfo $fileInfo */
-				if ($fileInfo->isLink()) {
-					unlink($fileInfo->getPathname());
-				} elseif ($fileInfo->isDir()) {
-					rmdir($fileInfo->getRealPath());
-				} else {
-					unlink($fileInfo->getRealPath());
-				}
-			}
-			if ($deleteSelf) {
-				rmdir($dir);
-			}
-		} elseif (file_exists($dir)) {
-			if ($deleteSelf) {
-				unlink($dir);
-			}
-		}
-		if (!$deleteSelf) {
-			return true;
-		}
-
-		return !file_exists($dir);
-	}
-
-	/**
-	 * @deprecated 18.0.0
-	 * @return \OC\Files\Type\TemplateManager
-	 */
-	public static function getFileTemplateManager() {
-		if (!self::$templateManager) {
-			self::$templateManager = new \OC\Files\Type\TemplateManager();
-		}
-		return self::$templateManager;
-	}
-
-	/**
-	 * detect if a given program is found in the search PATH
-	 *
-	 * @param string $name
-	 * @param bool $path
-	 * @internal param string $program name
-	 * @internal param string $optional search path, defaults to $PATH
-	 * @return bool    true if executable program found in path
-	 */
-	public static function canExecute($name, $path = false) {
-		// path defaults to PATH from environment if not set
-		if ($path === false) {
-			$path = getenv("PATH");
-		}
-		// we look for an executable file of that name
-		$exts = [""];
-		$check_fn = "is_executable";
-		// Default check will be done with $path directories :
-		$dirs = explode(PATH_SEPARATOR, $path);
-		// WARNING : We have to check if open_basedir is enabled :
-		$obd = OC::$server->get(IniGetWrapper::class)->getString('open_basedir');
-		if ($obd != "none") {
-			$obd_values = explode(PATH_SEPARATOR, $obd);
-			if (count($obd_values) > 0 and $obd_values[0]) {
-				// open_basedir is in effect !
-				// We need to check if the program is in one of these dirs :
-				$dirs = $obd_values;
-			}
-		}
-		foreach ($dirs as $dir) {
-			foreach ($exts as $ext) {
-				if ($check_fn("$dir/$name" . $ext)) {
-					return true;
-				}
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * copy the contents of one stream to another
-	 *
-	 * @param resource $source
-	 * @param resource $target
-	 * @return array the number of bytes copied and result
-	 */
-	public static function streamCopy($source, $target) {
-		if (!$source or !$target) {
-			return [0, false];
-		}
-		$bufSize = 8192;
-		$result = true;
-		$count = 0;
-		while (!feof($source)) {
-			$buf = fread($source, $bufSize);
-			$bytesWritten = fwrite($target, $buf);
-			if ($bytesWritten !== false) {
-				$count += $bytesWritten;
-			}
-			// note: strlen is expensive so only use it when necessary,
-			// on the last block
-			if ($bytesWritten === false
-				|| ($bytesWritten < $bufSize && $bytesWritten < strlen($buf))
-			) {
-				// write error, could be disk full ?
-				$result = false;
-				break;
-			}
-		}
-		return [$count, $result];
-	}
-
-	/**
-	 * Adds a suffix to the name in case the file exists
-	 *
-	 * @param string $path
-	 * @param string $filename
-	 * @return string
-	 */
-	public static function buildNotExistingFileName($path, $filename) {
-		$view = \OC\Files\Filesystem::getView();
-		return self::buildNotExistingFileNameForView($path, $filename, $view);
-	}
-
-	/**
-	 * Adds a suffix to the name in case the file exists
-	 *
-	 * @param string $path
-	 * @param string $filename
-	 * @return string
-	 */
-	public static function buildNotExistingFileNameForView($path, $filename, \OC\Files\View $view) {
-		if ($path === '/') {
-			$path = '';
-		}
-		if ($pos = strrpos($filename, '.')) {
-			$name = substr($filename, 0, $pos);
-			$ext = substr($filename, $pos);
-		} else {
-			$name = $filename;
-			$ext = '';
-		}
-
-		$newpath = $path . '/' . $filename;
-		if ($view->file_exists($newpath)) {
-			if (preg_match_all('/\((\d+)\)/', $name, $matches, PREG_OFFSET_CAPTURE)) {
-				//Replace the last "(number)" with "(number+1)"
-				$last_match = count($matches[0]) - 1;
-				$counter = $matches[1][$last_match][0] + 1;
-				$offset = $matches[0][$last_match][1];
-				$match_length = strlen($matches[0][$last_match][0]);
-			} else {
-				$counter = 2;
-				$match_length = 0;
-				$offset = false;
-			}
-			do {
-				if ($offset) {
-					//Replace the last "(number)" with "(number+1)"
-					$newname = substr_replace($name, '(' . $counter . ')', $offset, $match_length);
-				} else {
-					$newname = $name . ' (' . $counter . ')';
-				}
-				$newpath = $path . '/' . $newname . $ext;
-				$counter++;
-			} while ($view->file_exists($newpath));
-		}
-
-		return $newpath;
-	}
-
-	/**
-	 * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is.
-	 *
-	 * @param array $input The array to work on
-	 * @param int $case Either MB_CASE_UPPER or MB_CASE_LOWER (default)
-	 * @param string $encoding The encoding parameter is the character encoding. Defaults to UTF-8
-	 * @return array
-	 *
-	 * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is.
-	 * based on https://www.php.net/manual/en/function.array-change-key-case.php#107715
-	 *
-	 */
-	public static function mb_array_change_key_case($input, $case = MB_CASE_LOWER, $encoding = 'UTF-8') {
-		$case = ($case != MB_CASE_UPPER) ? MB_CASE_LOWER : MB_CASE_UPPER;
-		$ret = [];
-		foreach ($input as $k => $v) {
-			$ret[mb_convert_case($k, $case, $encoding)] = $v;
-		}
-		return $ret;
-	}
-
-	/**
-	 * performs a search in a nested array
-	 * @param array $haystack the array to be searched
-	 * @param string $needle the search string
-	 * @param mixed $index optional, only search this key name
-	 * @return mixed the key of the matching field, otherwise false
-	 *
-	 * performs a search in a nested array
-	 *
-	 * taken from https://www.php.net/manual/en/function.array-search.php#97645
-	 */
-	public static function recursiveArraySearch($haystack, $needle, $index = null) {
-		$aIt = new RecursiveArrayIterator($haystack);
-		$it = new RecursiveIteratorIterator($aIt);
-
-		while ($it->valid()) {
-			if (((isset($index) and ($it->key() == $index)) or !isset($index)) and ($it->current() == $needle)) {
-				return $aIt->key();
-			}
-
-			$it->next();
-		}
-
-		return false;
-	}
-
-	/**
-	 * calculates the maximum upload size respecting system settings, free space and user quota
-	 *
-	 * @param string $dir the current folder where the user currently operates
-	 * @param int $freeSpace the number of bytes free on the storage holding $dir, if not set this will be received from the storage directly
-	 * @return int number of bytes representing
-	 */
-	public static function maxUploadFilesize($dir, $freeSpace = null) {
-		if (is_null($freeSpace) || $freeSpace < 0) {
-			$freeSpace = self::freeSpace($dir);
-		}
-		return min($freeSpace, self::uploadLimit());
-	}
-
-	/**
-	 * Calculate free space left within user quota
-	 *
-	 * @param string $dir the current folder where the user currently operates
-	 * @return int number of bytes representing
-	 */
-	public static function freeSpace($dir) {
-		$freeSpace = \OC\Files\Filesystem::free_space($dir);
-		if ($freeSpace < \OCP\Files\FileInfo::SPACE_UNLIMITED) {
-			$freeSpace = max($freeSpace, 0);
-			return $freeSpace;
-		} else {
-			return (INF > 0)? INF: PHP_INT_MAX; // work around https://bugs.php.net/bug.php?id=69188
-		}
-	}
-
-	/**
-	 * Calculate PHP upload limit
-	 *
-	 * @return int PHP upload file size limit
-	 */
-	public static function uploadLimit() {
-		$ini = \OC::$server->get(IniGetWrapper::class);
-		$upload_max_filesize = OCP\Util::computerFileSize($ini->get('upload_max_filesize'));
-		$post_max_size = OCP\Util::computerFileSize($ini->get('post_max_size'));
-		if ((int)$upload_max_filesize === 0 and (int)$post_max_size === 0) {
-			return INF;
-		} elseif ((int)$upload_max_filesize === 0 or (int)$post_max_size === 0) {
-			return max($upload_max_filesize, $post_max_size); //only the non 0 value counts
-		} else {
-			return min($upload_max_filesize, $post_max_size);
-		}
-	}
-
-	/**
-	 * Checks if a function is available
-	 *
-	 * @param string $function_name
-	 * @return bool
-	 */
-	public static function is_function_enabled($function_name) {
-		if (!function_exists($function_name)) {
-			return false;
-		}
-		$ini = \OC::$server->get(IniGetWrapper::class);
-		$disabled = explode(',', $ini->get('disable_functions') ?: '');
-		$disabled = array_map('trim', $disabled);
-		if (in_array($function_name, $disabled)) {
-			return false;
-		}
-		$disabled = explode(',', $ini->get('suhosin.executor.func.blacklist') ?: '');
-		$disabled = array_map('trim', $disabled);
-		if (in_array($function_name, $disabled)) {
-			return false;
-		}
-		return true;
-	}
-
-	/**
-	 * Try to find a program
-	 *
-	 * @param string $program
-	 * @return null|string
-	 */
-	public static function findBinaryPath($program) {
-		$memcache = \OC::$server->getMemCacheFactory()->createDistributed('findBinaryPath');
-		if ($memcache->hasKey($program)) {
-			return $memcache->get($program);
-		}
-		$result = null;
-		if (self::is_function_enabled('exec')) {
-			$exeSniffer = new ExecutableFinder();
-			// Returns null if nothing is found
-			$result = $exeSniffer->find($program, null, ['/usr/local/sbin', '/usr/local/bin', '/usr/sbin', '/usr/bin', '/sbin', '/bin', '/opt/bin']);
-		}
-		// store the value for 5 minutes
-		$memcache->set($program, $result, 300);
-		return $result;
-	}
-
-	/**
-	 * Calculate the disc space for the given path
-	 *
-	 * BEWARE: this requires that Util::setupFS() was called
-	 * already !
-	 *
-	 * @param string $path
-	 * @param \OCP\Files\FileInfo $rootInfo (optional)
-	 * @return array
-	 * @throws \OCP\Files\NotFoundException
-	 */
-	public static function getStorageInfo($path, $rootInfo = null, $includeMountPoints = true) {
-		// return storage info without adding mount points
-		$includeExtStorage = \OC::$server->getSystemConfig()->getValue('quota_include_external_storage', false);
-
-		if (!$rootInfo) {
-			$rootInfo = \OC\Files\Filesystem::getFileInfo($path, $includeExtStorage ? 'ext' : false);
-		}
-		if (!$rootInfo instanceof \OCP\Files\FileInfo) {
-			throw new \OCP\Files\NotFoundException();
-		}
-		$used = $rootInfo->getSize($includeMountPoints);
-		if ($used < 0) {
-			$used = 0;
-		}
-		$quota = \OCP\Files\FileInfo::SPACE_UNLIMITED;
-		$mount = $rootInfo->getMountPoint();
-		$storage = $mount->getStorage();
-		$sourceStorage = $storage;
-		if ($storage->instanceOfStorage('\OCA\Files_Sharing\SharedStorage')) {
-			$includeExtStorage = false;
-			$sourceStorage = $storage->getSourceStorage();
-			$internalPath = $storage->getUnjailedPath($rootInfo->getInternalPath());
-		} else {
-			$internalPath = $rootInfo->getInternalPath();
-		}
-		if ($includeExtStorage) {
-			if ($storage->instanceOfStorage('\OC\Files\Storage\Home')
-				|| $storage->instanceOfStorage('\OC\Files\ObjectStore\HomeObjectStoreStorage')
-			) {
-				/** @var \OC\Files\Storage\Home $storage */
-				$user = $storage->getUser();
-			} else {
-				$user = \OC::$server->getUserSession()->getUser();
-			}
-			$quota = OC_Util::getUserQuota($user);
-			if ($quota !== \OCP\Files\FileInfo::SPACE_UNLIMITED) {
-				// always get free space / total space from root + mount points
-				return self::getGlobalStorageInfo($quota, $user, $mount);
-			}
-		}
-
-		// TODO: need a better way to get total space from storage
-		if ($sourceStorage->instanceOfStorage('\OC\Files\Storage\Wrapper\Quota')) {
-			/** @var \OC\Files\Storage\Wrapper\Quota $storage */
-			$quota = $sourceStorage->getQuota();
-		}
-		$free = $sourceStorage->free_space($internalPath);
-		if ($free >= 0) {
-			$total = $free + $used;
-		} else {
-			$total = $free; //either unknown or unlimited
-		}
-		if ($total > 0) {
-			if ($quota > 0 && $total > $quota) {
-				$total = $quota;
-			}
-			// prevent division by zero or error codes (negative values)
-			$relative = round(($used / $total) * 10000) / 100;
-		} else {
-			$relative = 0;
-		}
-
-		$ownerId = $storage->getOwner($path);
-		$ownerDisplayName = '';
-		$owner = \OC::$server->getUserManager()->get($ownerId);
-		if ($owner) {
-			$ownerDisplayName = $owner->getDisplayName();
-		}
-		if (substr_count($mount->getMountPoint(), '/') < 3) {
-			$mountPoint = '';
-		} else {
-			[,,,$mountPoint] = explode('/', $mount->getMountPoint(), 4);
-		}
-
-		return [
-			'free' => $free,
-			'used' => $used,
-			'quota' => $quota,
-			'total' => $total,
-			'relative' => $relative,
-			'owner' => $ownerId,
-			'ownerDisplayName' => $ownerDisplayName,
-			'mountType' => $mount->getMountType(),
-			'mountPoint' => trim($mountPoint, '/'),
-		];
-	}
-
-	/**
-	 * Get storage info including all mount points and quota
-	 */
-	private static function getGlobalStorageInfo(int $quota, IUser $user, IMountPoint $mount): array {
-		$rootInfo = \OC\Files\Filesystem::getFileInfo('', 'ext');
-		$used = $rootInfo['size'];
-		if ($used < 0) {
-			$used = 0;
-		}
-
-		$total = $quota;
-		$free = $quota - $used;
-
-		if ($total > 0) {
-			if ($quota > 0 && $total > $quota) {
-				$total = $quota;
-			}
-			// prevent division by zero or error codes (negative values)
-			$relative = round(($used / $total) * 10000) / 100;
-		} else {
-			$relative = 0;
-		}
-
-		if (substr_count($mount->getMountPoint(), '/') < 3) {
-			$mountPoint = '';
-		} else {
-			[,,,$mountPoint] = explode('/', $mount->getMountPoint(), 4);
-		}
-
-		return [
-			'free' => $free,
-			'used' => $used,
-			'total' => $total,
-			'relative' => $relative,
-			'quota' => $quota,
-			'owner' => $user->getUID(),
-			'ownerDisplayName' => $user->getDisplayName(),
-			'mountType' => $mount->getMountType(),
-			'mountPoint' => trim($mountPoint, '/'),
-		];
-	}
-
-	/**
-	 * Returns whether the config file is set manually to read-only
-	 * @return bool
-	 */
-	public static function isReadOnlyConfigEnabled() {
-		return \OC::$server->getConfig()->getSystemValue('config_is_read_only', false);
-	}
+    private static $templateManager;
+
+    /**
+     * Make a human file size
+     * @param int $bytes file size in bytes
+     * @return string a human readable file size
+     *
+     * Makes 2048 to 2 kB.
+     */
+    public static function humanFileSize($bytes) {
+        if ($bytes < 0) {
+            return "?";
+        }
+        if ($bytes < 1024) {
+            return "$bytes B";
+        }
+        $bytes = round($bytes / 1024, 0);
+        if ($bytes < 1024) {
+            return "$bytes KB";
+        }
+        $bytes = round($bytes / 1024, 1);
+        if ($bytes < 1024) {
+            return "$bytes MB";
+        }
+        $bytes = round($bytes / 1024, 1);
+        if ($bytes < 1024) {
+            return "$bytes GB";
+        }
+        $bytes = round($bytes / 1024, 1);
+        if ($bytes < 1024) {
+            return "$bytes TB";
+        }
+
+        $bytes = round($bytes / 1024, 1);
+        return "$bytes PB";
+    }
+
+    /**
+     * Make a computer file size
+     * @param string $str file size in human readable format
+     * @return float|bool a file size in bytes
+     *
+     * Makes 2kB to 2048.
+     *
+     * Inspired by: https://www.php.net/manual/en/function.filesize.php#92418
+     */
+    public static function computerFileSize($str) {
+        $str = strtolower($str);
+        if (is_numeric($str)) {
+            return (float)$str;
+        }
+
+        $bytes_array = [
+            'b' => 1,
+            'k' => 1024,
+            'kb' => 1024,
+            'mb' => 1024 * 1024,
+            'm' => 1024 * 1024,
+            'gb' => 1024 * 1024 * 1024,
+            'g' => 1024 * 1024 * 1024,
+            'tb' => 1024 * 1024 * 1024 * 1024,
+            't' => 1024 * 1024 * 1024 * 1024,
+            'pb' => 1024 * 1024 * 1024 * 1024 * 1024,
+            'p' => 1024 * 1024 * 1024 * 1024 * 1024,
+        ];
+
+        $bytes = (float)$str;
+
+        if (preg_match('#([kmgtp]?b?)$#si', $str, $matches) && !empty($bytes_array[$matches[1]])) {
+            $bytes *= $bytes_array[$matches[1]];
+        } else {
+            return false;
+        }
+
+        $bytes = round($bytes);
+
+        return $bytes;
+    }
+
+    /**
+     * Recursive copying of folders
+     * @param string $src source folder
+     * @param string $dest target folder
+     *
+     */
+    public static function copyr($src, $dest) {
+        if (is_dir($src)) {
+            if (!is_dir($dest)) {
+                mkdir($dest);
+            }
+            $files = scandir($src);
+            foreach ($files as $file) {
+                if ($file != "." && $file != "..") {
+                    self::copyr("$src/$file", "$dest/$file");
+                }
+            }
+        } elseif (file_exists($src) && !\OC\Files\Filesystem::isFileBlacklisted($src)) {
+            copy($src, $dest);
+        }
+    }
+
+    /**
+     * Recursive deletion of folders
+     * @param string $dir path to the folder
+     * @param bool $deleteSelf if set to false only the content of the folder will be deleted
+     * @return bool
+     */
+    public static function rmdirr($dir, $deleteSelf = true) {
+        if (is_dir($dir)) {
+            $files = new RecursiveIteratorIterator(
+                new RecursiveDirectoryIterator($dir, RecursiveDirectoryIterator::SKIP_DOTS),
+                RecursiveIteratorIterator::CHILD_FIRST
+            );
+
+            foreach ($files as $fileInfo) {
+                /** @var SplFileInfo $fileInfo */
+                if ($fileInfo->isLink()) {
+                    unlink($fileInfo->getPathname());
+                } elseif ($fileInfo->isDir()) {
+                    rmdir($fileInfo->getRealPath());
+                } else {
+                    unlink($fileInfo->getRealPath());
+                }
+            }
+            if ($deleteSelf) {
+                rmdir($dir);
+            }
+        } elseif (file_exists($dir)) {
+            if ($deleteSelf) {
+                unlink($dir);
+            }
+        }
+        if (!$deleteSelf) {
+            return true;
+        }
+
+        return !file_exists($dir);
+    }
+
+    /**
+     * @deprecated 18.0.0
+     * @return \OC\Files\Type\TemplateManager
+     */
+    public static function getFileTemplateManager() {
+        if (!self::$templateManager) {
+            self::$templateManager = new \OC\Files\Type\TemplateManager();
+        }
+        return self::$templateManager;
+    }
+
+    /**
+     * detect if a given program is found in the search PATH
+     *
+     * @param string $name
+     * @param bool $path
+     * @internal param string $program name
+     * @internal param string $optional search path, defaults to $PATH
+     * @return bool    true if executable program found in path
+     */
+    public static function canExecute($name, $path = false) {
+        // path defaults to PATH from environment if not set
+        if ($path === false) {
+            $path = getenv("PATH");
+        }
+        // we look for an executable file of that name
+        $exts = [""];
+        $check_fn = "is_executable";
+        // Default check will be done with $path directories :
+        $dirs = explode(PATH_SEPARATOR, $path);
+        // WARNING : We have to check if open_basedir is enabled :
+        $obd = OC::$server->get(IniGetWrapper::class)->getString('open_basedir');
+        if ($obd != "none") {
+            $obd_values = explode(PATH_SEPARATOR, $obd);
+            if (count($obd_values) > 0 and $obd_values[0]) {
+                // open_basedir is in effect !
+                // We need to check if the program is in one of these dirs :
+                $dirs = $obd_values;
+            }
+        }
+        foreach ($dirs as $dir) {
+            foreach ($exts as $ext) {
+                if ($check_fn("$dir/$name" . $ext)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * copy the contents of one stream to another
+     *
+     * @param resource $source
+     * @param resource $target
+     * @return array the number of bytes copied and result
+     */
+    public static function streamCopy($source, $target) {
+        if (!$source or !$target) {
+            return [0, false];
+        }
+        $bufSize = 8192;
+        $result = true;
+        $count = 0;
+        while (!feof($source)) {
+            $buf = fread($source, $bufSize);
+            $bytesWritten = fwrite($target, $buf);
+            if ($bytesWritten !== false) {
+                $count += $bytesWritten;
+            }
+            // note: strlen is expensive so only use it when necessary,
+            // on the last block
+            if ($bytesWritten === false
+                || ($bytesWritten < $bufSize && $bytesWritten < strlen($buf))
+            ) {
+                // write error, could be disk full ?
+                $result = false;
+                break;
+            }
+        }
+        return [$count, $result];
+    }
+
+    /**
+     * Adds a suffix to the name in case the file exists
+     *
+     * @param string $path
+     * @param string $filename
+     * @return string
+     */
+    public static function buildNotExistingFileName($path, $filename) {
+        $view = \OC\Files\Filesystem::getView();
+        return self::buildNotExistingFileNameForView($path, $filename, $view);
+    }
+
+    /**
+     * Adds a suffix to the name in case the file exists
+     *
+     * @param string $path
+     * @param string $filename
+     * @return string
+     */
+    public static function buildNotExistingFileNameForView($path, $filename, \OC\Files\View $view) {
+        if ($path === '/') {
+            $path = '';
+        }
+        if ($pos = strrpos($filename, '.')) {
+            $name = substr($filename, 0, $pos);
+            $ext = substr($filename, $pos);
+        } else {
+            $name = $filename;
+            $ext = '';
+        }
+
+        $newpath = $path . '/' . $filename;
+        if ($view->file_exists($newpath)) {
+            if (preg_match_all('/\((\d+)\)/', $name, $matches, PREG_OFFSET_CAPTURE)) {
+                //Replace the last "(number)" with "(number+1)"
+                $last_match = count($matches[0]) - 1;
+                $counter = $matches[1][$last_match][0] + 1;
+                $offset = $matches[0][$last_match][1];
+                $match_length = strlen($matches[0][$last_match][0]);
+            } else {
+                $counter = 2;
+                $match_length = 0;
+                $offset = false;
+            }
+            do {
+                if ($offset) {
+                    //Replace the last "(number)" with "(number+1)"
+                    $newname = substr_replace($name, '(' . $counter . ')', $offset, $match_length);
+                } else {
+                    $newname = $name . ' (' . $counter . ')';
+                }
+                $newpath = $path . '/' . $newname . $ext;
+                $counter++;
+            } while ($view->file_exists($newpath));
+        }
+
+        return $newpath;
+    }
+
+    /**
+     * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is.
+     *
+     * @param array $input The array to work on
+     * @param int $case Either MB_CASE_UPPER or MB_CASE_LOWER (default)
+     * @param string $encoding The encoding parameter is the character encoding. Defaults to UTF-8
+     * @return array
+     *
+     * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is.
+     * based on https://www.php.net/manual/en/function.array-change-key-case.php#107715
+     *
+     */
+    public static function mb_array_change_key_case($input, $case = MB_CASE_LOWER, $encoding = 'UTF-8') {
+        $case = ($case != MB_CASE_UPPER) ? MB_CASE_LOWER : MB_CASE_UPPER;
+        $ret = [];
+        foreach ($input as $k => $v) {
+            $ret[mb_convert_case($k, $case, $encoding)] = $v;
+        }
+        return $ret;
+    }
+
+    /**
+     * performs a search in a nested array
+     * @param array $haystack the array to be searched
+     * @param string $needle the search string
+     * @param mixed $index optional, only search this key name
+     * @return mixed the key of the matching field, otherwise false
+     *
+     * performs a search in a nested array
+     *
+     * taken from https://www.php.net/manual/en/function.array-search.php#97645
+     */
+    public static function recursiveArraySearch($haystack, $needle, $index = null) {
+        $aIt = new RecursiveArrayIterator($haystack);
+        $it = new RecursiveIteratorIterator($aIt);
+
+        while ($it->valid()) {
+            if (((isset($index) and ($it->key() == $index)) or !isset($index)) and ($it->current() == $needle)) {
+                return $aIt->key();
+            }
+
+            $it->next();
+        }
+
+        return false;
+    }
+
+    /**
+     * calculates the maximum upload size respecting system settings, free space and user quota
+     *
+     * @param string $dir the current folder where the user currently operates
+     * @param int $freeSpace the number of bytes free on the storage holding $dir, if not set this will be received from the storage directly
+     * @return int number of bytes representing
+     */
+    public static function maxUploadFilesize($dir, $freeSpace = null) {
+        if (is_null($freeSpace) || $freeSpace < 0) {
+            $freeSpace = self::freeSpace($dir);
+        }
+        return min($freeSpace, self::uploadLimit());
+    }
+
+    /**
+     * Calculate free space left within user quota
+     *
+     * @param string $dir the current folder where the user currently operates
+     * @return int number of bytes representing
+     */
+    public static function freeSpace($dir) {
+        $freeSpace = \OC\Files\Filesystem::free_space($dir);
+        if ($freeSpace < \OCP\Files\FileInfo::SPACE_UNLIMITED) {
+            $freeSpace = max($freeSpace, 0);
+            return $freeSpace;
+        } else {
+            return (INF > 0)? INF: PHP_INT_MAX; // work around https://bugs.php.net/bug.php?id=69188
+        }
+    }
+
+    /**
+     * Calculate PHP upload limit
+     *
+     * @return int PHP upload file size limit
+     */
+    public static function uploadLimit() {
+        $ini = \OC::$server->get(IniGetWrapper::class);
+        $upload_max_filesize = OCP\Util::computerFileSize($ini->get('upload_max_filesize'));
+        $post_max_size = OCP\Util::computerFileSize($ini->get('post_max_size'));
+        if ((int)$upload_max_filesize === 0 and (int)$post_max_size === 0) {
+            return INF;
+        } elseif ((int)$upload_max_filesize === 0 or (int)$post_max_size === 0) {
+            return max($upload_max_filesize, $post_max_size); //only the non 0 value counts
+        } else {
+            return min($upload_max_filesize, $post_max_size);
+        }
+    }
+
+    /**
+     * Checks if a function is available
+     *
+     * @param string $function_name
+     * @return bool
+     */
+    public static function is_function_enabled($function_name) {
+        if (!function_exists($function_name)) {
+            return false;
+        }
+        $ini = \OC::$server->get(IniGetWrapper::class);
+        $disabled = explode(',', $ini->get('disable_functions') ?: '');
+        $disabled = array_map('trim', $disabled);
+        if (in_array($function_name, $disabled)) {
+            return false;
+        }
+        $disabled = explode(',', $ini->get('suhosin.executor.func.blacklist') ?: '');
+        $disabled = array_map('trim', $disabled);
+        if (in_array($function_name, $disabled)) {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Try to find a program
+     *
+     * @param string $program
+     * @return null|string
+     */
+    public static function findBinaryPath($program) {
+        $memcache = \OC::$server->getMemCacheFactory()->createDistributed('findBinaryPath');
+        if ($memcache->hasKey($program)) {
+            return $memcache->get($program);
+        }
+        $result = null;
+        if (self::is_function_enabled('exec')) {
+            $exeSniffer = new ExecutableFinder();
+            // Returns null if nothing is found
+            $result = $exeSniffer->find($program, null, ['/usr/local/sbin', '/usr/local/bin', '/usr/sbin', '/usr/bin', '/sbin', '/bin', '/opt/bin']);
+        }
+        // store the value for 5 minutes
+        $memcache->set($program, $result, 300);
+        return $result;
+    }
+
+    /**
+     * Calculate the disc space for the given path
+     *
+     * BEWARE: this requires that Util::setupFS() was called
+     * already !
+     *
+     * @param string $path
+     * @param \OCP\Files\FileInfo $rootInfo (optional)
+     * @return array
+     * @throws \OCP\Files\NotFoundException
+     */
+    public static function getStorageInfo($path, $rootInfo = null, $includeMountPoints = true) {
+        // return storage info without adding mount points
+        $includeExtStorage = \OC::$server->getSystemConfig()->getValue('quota_include_external_storage', false);
+
+        if (!$rootInfo) {
+            $rootInfo = \OC\Files\Filesystem::getFileInfo($path, $includeExtStorage ? 'ext' : false);
+        }
+        if (!$rootInfo instanceof \OCP\Files\FileInfo) {
+            throw new \OCP\Files\NotFoundException();
+        }
+        $used = $rootInfo->getSize($includeMountPoints);
+        if ($used < 0) {
+            $used = 0;
+        }
+        $quota = \OCP\Files\FileInfo::SPACE_UNLIMITED;
+        $mount = $rootInfo->getMountPoint();
+        $storage = $mount->getStorage();
+        $sourceStorage = $storage;
+        if ($storage->instanceOfStorage('\OCA\Files_Sharing\SharedStorage')) {
+            $includeExtStorage = false;
+            $sourceStorage = $storage->getSourceStorage();
+            $internalPath = $storage->getUnjailedPath($rootInfo->getInternalPath());
+        } else {
+            $internalPath = $rootInfo->getInternalPath();
+        }
+        if ($includeExtStorage) {
+            if ($storage->instanceOfStorage('\OC\Files\Storage\Home')
+                || $storage->instanceOfStorage('\OC\Files\ObjectStore\HomeObjectStoreStorage')
+            ) {
+                /** @var \OC\Files\Storage\Home $storage */
+                $user = $storage->getUser();
+            } else {
+                $user = \OC::$server->getUserSession()->getUser();
+            }
+            $quota = OC_Util::getUserQuota($user);
+            if ($quota !== \OCP\Files\FileInfo::SPACE_UNLIMITED) {
+                // always get free space / total space from root + mount points
+                return self::getGlobalStorageInfo($quota, $user, $mount);
+            }
+        }
+
+        // TODO: need a better way to get total space from storage
+        if ($sourceStorage->instanceOfStorage('\OC\Files\Storage\Wrapper\Quota')) {
+            /** @var \OC\Files\Storage\Wrapper\Quota $storage */
+            $quota = $sourceStorage->getQuota();
+        }
+        $free = $sourceStorage->free_space($internalPath);
+        if ($free >= 0) {
+            $total = $free + $used;
+        } else {
+            $total = $free; //either unknown or unlimited
+        }
+        if ($total > 0) {
+            if ($quota > 0 && $total > $quota) {
+                $total = $quota;
+            }
+            // prevent division by zero or error codes (negative values)
+            $relative = round(($used / $total) * 10000) / 100;
+        } else {
+            $relative = 0;
+        }
+
+        $ownerId = $storage->getOwner($path);
+        $ownerDisplayName = '';
+        $owner = \OC::$server->getUserManager()->get($ownerId);
+        if ($owner) {
+            $ownerDisplayName = $owner->getDisplayName();
+        }
+        if (substr_count($mount->getMountPoint(), '/') < 3) {
+            $mountPoint = '';
+        } else {
+            [,,,$mountPoint] = explode('/', $mount->getMountPoint(), 4);
+        }
+
+        return [
+            'free' => $free,
+            'used' => $used,
+            'quota' => $quota,
+            'total' => $total,
+            'relative' => $relative,
+            'owner' => $ownerId,
+            'ownerDisplayName' => $ownerDisplayName,
+            'mountType' => $mount->getMountType(),
+            'mountPoint' => trim($mountPoint, '/'),
+        ];
+    }
+
+    /**
+     * Get storage info including all mount points and quota
+     */
+    private static function getGlobalStorageInfo(int $quota, IUser $user, IMountPoint $mount): array {
+        $rootInfo = \OC\Files\Filesystem::getFileInfo('', 'ext');
+        $used = $rootInfo['size'];
+        if ($used < 0) {
+            $used = 0;
+        }
+
+        $total = $quota;
+        $free = $quota - $used;
+
+        if ($total > 0) {
+            if ($quota > 0 && $total > $quota) {
+                $total = $quota;
+            }
+            // prevent division by zero or error codes (negative values)
+            $relative = round(($used / $total) * 10000) / 100;
+        } else {
+            $relative = 0;
+        }
+
+        if (substr_count($mount->getMountPoint(), '/') < 3) {
+            $mountPoint = '';
+        } else {
+            [,,,$mountPoint] = explode('/', $mount->getMountPoint(), 4);
+        }
+
+        return [
+            'free' => $free,
+            'used' => $used,
+            'total' => $total,
+            'relative' => $relative,
+            'quota' => $quota,
+            'owner' => $user->getUID(),
+            'ownerDisplayName' => $user->getDisplayName(),
+            'mountType' => $mount->getMountType(),
+            'mountPoint' => trim($mountPoint, '/'),
+        ];
+    }
+
+    /**
+     * Returns whether the config file is set manually to read-only
+     * @return bool
+     */
+    public static function isReadOnlyConfigEnabled() {
+        return \OC::$server->getConfig()->getSystemValue('config_is_read_only', false);
+    }
 }

apps/dav/lib/Connector/Sabre/Directory.php

Indentation +421 added lines, -421 removed lines

@@ -53,425 +53,425 @@
 
 class Directory extends \OCA\DAV\Connector\Sabre\Node implements \Sabre\DAV\ICollection, \Sabre\DAV\IQuota, \Sabre\DAV\IMoveTarget, \Sabre\DAV\ICopyTarget {
 
-	/**
-	 * Cached directory content
-	 *
-	 * @var \OCP\Files\FileInfo[]
-	 */
-	private $dirContent;
-
-	/**
-	 * Cached quota info
-	 *
-	 * @var array
-	 */
-	private $quotaInfo;
-
-	/**
-	 * @var ObjectTree|null
-	 */
-	private $tree;
-
-	/**
-	 * Sets up the node, expects a full path name
-	 *
-	 * @param \OC\Files\View $view
-	 * @param \OCP\Files\FileInfo $info
-	 * @param ObjectTree|null $tree
-	 * @param \OCP\Share\IManager $shareManager
-	 */
-	public function __construct(View $view, FileInfo $info, $tree = null, $shareManager = null) {
-		parent::__construct($view, $info, $shareManager);
-		$this->tree = $tree;
-	}
-
-	/**
-	 * Creates a new file in the directory
-	 *
-	 * Data will either be supplied as a stream resource, or in certain cases
-	 * as a string. Keep in mind that you may have to support either.
-	 *
-	 * After successful creation of the file, you may choose to return the ETag
-	 * of the new file here.
-	 *
-	 * The returned ETag must be surrounded by double-quotes (The quotes should
-	 * be part of the actual string).
-	 *
-	 * If you cannot accurately determine the ETag, you should not return it.
-	 * If you don't store the file exactly as-is (you're transforming it
-	 * somehow) you should also not return an ETag.
-	 *
-	 * This means that if a subsequent GET to this new file does not exactly
-	 * return the same contents of what was submitted here, you are strongly
-	 * recommended to omit the ETag.
-	 *
-	 * @param string $name Name of the file
-	 * @param resource|string $data Initial payload
-	 * @return null|string
-	 * @throws Exception\EntityTooLarge
-	 * @throws Exception\UnsupportedMediaType
-	 * @throws FileLocked
-	 * @throws InvalidPath
-	 * @throws \Sabre\DAV\Exception
-	 * @throws \Sabre\DAV\Exception\BadRequest
-	 * @throws \Sabre\DAV\Exception\Forbidden
-	 * @throws \Sabre\DAV\Exception\ServiceUnavailable
-	 */
-	public function createFile($name, $data = null) {
-		try {
-			// for chunked upload also updating a existing file is a "createFile"
-			// because we create all the chunks before re-assemble them to the existing file.
-			if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
-
-				// exit if we can't create a new file and we don't updatable existing file
-				$chunkInfo = \OC_FileChunking::decodeName($name);
-				if (!$this->fileView->isCreatable($this->path) &&
-					!$this->fileView->isUpdatable($this->path . '/' . $chunkInfo['name'])
-				) {
-					throw new \Sabre\DAV\Exception\Forbidden();
-				}
-			} else {
-				// For non-chunked upload it is enough to check if we can create a new file
-				if (!$this->fileView->isCreatable($this->path)) {
-					throw new \Sabre\DAV\Exception\Forbidden();
-				}
-			}
-
-			$this->fileView->verifyPath($this->path, $name);
-
-			$path = $this->fileView->getAbsolutePath($this->path) . '/' . $name;
-			// in case the file already exists/overwriting
-			$info = $this->fileView->getFileInfo($this->path . '/' . $name);
-			if (!$info) {
-				// use a dummy FileInfo which is acceptable here since it will be refreshed after the put is complete
-				$info = new \OC\Files\FileInfo($path, null, null, [], null);
-			}
-			$node = new \OCA\DAV\Connector\Sabre\File($this->fileView, $info);
-
-			// only allow 1 process to upload a file at once but still allow reading the file while writing the part file
-			$node->acquireLock(ILockingProvider::LOCK_SHARED);
-			$this->fileView->lockFile($path . '.upload.part', ILockingProvider::LOCK_EXCLUSIVE);
-
-			$result = $node->put($data);
-
-			$this->fileView->unlockFile($path . '.upload.part', ILockingProvider::LOCK_EXCLUSIVE);
-			$node->releaseLock(ILockingProvider::LOCK_SHARED);
-			return $result;
-		} catch (\OCP\Files\StorageNotAvailableException $e) {
-			throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage(), $e->getCode(), $e);
-		} catch (InvalidPathException $ex) {
-			throw new InvalidPath($ex->getMessage(), false, $ex);
-		} catch (ForbiddenException $ex) {
-			throw new Forbidden($ex->getMessage(), $ex->getRetry(), $ex);
-		} catch (LockedException $e) {
-			throw new FileLocked($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	/**
-	 * Creates a new subdirectory
-	 *
-	 * @param string $name
-	 * @throws FileLocked
-	 * @throws InvalidPath
-	 * @throws \Sabre\DAV\Exception\Forbidden
-	 * @throws \Sabre\DAV\Exception\ServiceUnavailable
-	 */
-	public function createDirectory($name) {
-		try {
-			if (!$this->info->isCreatable()) {
-				throw new \Sabre\DAV\Exception\Forbidden();
-			}
-
-			$this->fileView->verifyPath($this->path, $name);
-			$newPath = $this->path . '/' . $name;
-			if (!$this->fileView->mkdir($newPath)) {
-				throw new \Sabre\DAV\Exception\Forbidden('Could not create directory ' . $newPath);
-			}
-		} catch (\OCP\Files\StorageNotAvailableException $e) {
-			throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage());
-		} catch (InvalidPathException $ex) {
-			throw new InvalidPath($ex->getMessage());
-		} catch (ForbiddenException $ex) {
-			throw new Forbidden($ex->getMessage(), $ex->getRetry());
-		} catch (LockedException $e) {
-			throw new FileLocked($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	/**
-	 * Returns a specific child node, referenced by its name
-	 *
-	 * @param string $name
-	 * @param \OCP\Files\FileInfo $info
-	 * @return \Sabre\DAV\INode
-	 * @throws InvalidPath
-	 * @throws \Sabre\DAV\Exception\NotFound
-	 * @throws \Sabre\DAV\Exception\ServiceUnavailable
-	 */
-	public function getChild($name, $info = null) {
-		if (!$this->info->isReadable()) {
-			// avoid detecting files through this way
-			throw new NotFound();
-		}
-
-		$path = $this->path . '/' . $name;
-		if (is_null($info)) {
-			try {
-				$this->fileView->verifyPath($this->path, $name);
-				$info = $this->fileView->getFileInfo($path);
-			} catch (\OCP\Files\StorageNotAvailableException $e) {
-				throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage());
-			} catch (InvalidPathException $ex) {
-				throw new InvalidPath($ex->getMessage());
-			} catch (ForbiddenException $e) {
-				throw new \Sabre\DAV\Exception\Forbidden();
-			}
-		}
-
-		if (!$info) {
-			throw new \Sabre\DAV\Exception\NotFound('File with name ' . $path . ' could not be located');
-		}
-
-		if ($info['mimetype'] === 'httpd/unix-directory') {
-			$node = new \OCA\DAV\Connector\Sabre\Directory($this->fileView, $info, $this->tree, $this->shareManager);
-		} else {
-			$node = new \OCA\DAV\Connector\Sabre\File($this->fileView, $info, $this->shareManager);
-		}
-		if ($this->tree) {
-			$this->tree->cacheNode($node);
-		}
-		return $node;
-	}
-
-	/**
-	 * Returns an array with all the child nodes
-	 *
-	 * @return \Sabre\DAV\INode[]
-	 * @throws \Sabre\DAV\Exception\Locked
-	 * @throws \OCA\DAV\Connector\Sabre\Exception\Forbidden
-	 */
-	public function getChildren() {
-		if (!is_null($this->dirContent)) {
-			return $this->dirContent;
-		}
-		try {
-			if (!$this->info->isReadable()) {
-				// return 403 instead of 404 because a 404 would make
-				// the caller believe that the collection itself does not exist
-				throw new Forbidden('No read permissions');
-			}
-			$folderContent = $this->fileView->getDirectoryContent($this->path);
-		} catch (LockedException $e) {
-			throw new Locked();
-		}
-
-		$nodes = [];
-		foreach ($folderContent as $info) {
-			$node = $this->getChild($info->getName(), $info);
-			$nodes[] = $node;
-		}
-		$this->dirContent = $nodes;
-		return $this->dirContent;
-	}
-
-	/**
-	 * Checks if a child exists.
-	 *
-	 * @param string $name
-	 * @return bool
-	 */
-	public function childExists($name) {
-		// note: here we do NOT resolve the chunk file name to the real file name
-		// to make sure we return false when checking for file existence with a chunk
-		// file name.
-		// This is to make sure that "createFile" is still triggered
-		// (required old code) instead of "updateFile".
-		//
-		// TODO: resolve chunk file name here and implement "updateFile"
-		$path = $this->path . '/' . $name;
-		return $this->fileView->file_exists($path);
-	}
-
-	/**
-	 * Deletes all files in this directory, and then itself
-	 *
-	 * @return void
-	 * @throws FileLocked
-	 * @throws \Sabre\DAV\Exception\Forbidden
-	 */
-	public function delete() {
-		if ($this->path === '' || $this->path === '/' || !$this->info->isDeletable()) {
-			throw new \Sabre\DAV\Exception\Forbidden();
-		}
-
-		try {
-			if (!$this->fileView->rmdir($this->path)) {
-				// assume it wasn't possible to remove due to permission issue
-				throw new \Sabre\DAV\Exception\Forbidden();
-			}
-		} catch (ForbiddenException $ex) {
-			throw new Forbidden($ex->getMessage(), $ex->getRetry());
-		} catch (LockedException $e) {
-			throw new FileLocked($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	/**
-	 * Returns available diskspace information
-	 *
-	 * @return array
-	 */
-	public function getQuotaInfo() {
-		if ($this->quotaInfo) {
-			return $this->quotaInfo;
-		}
-		try {
-			$storageInfo = \OC_Helper::getStorageInfo($this->info->getPath(), $this->info, false);
-			if ($storageInfo['quota'] === \OCP\Files\FileInfo::SPACE_UNLIMITED) {
-				$free = \OCP\Files\FileInfo::SPACE_UNLIMITED;
-			} else {
-				$free = $storageInfo['free'];
-			}
-			$this->quotaInfo = [
-				$storageInfo['used'],
-				$free
-			];
-			return $this->quotaInfo;
-		} catch (\OCP\Files\NotFoundException $e) {
-			return [0, 0];
-		} catch (\OCP\Files\StorageNotAvailableException $e) {
-			return [0, 0];
-		} catch (NotPermittedException $e) {
-			return [0, 0];
-		}
-	}
-
-	/**
-	 * Moves a node into this collection.
-	 *
-	 * It is up to the implementors to:
-	 *   1. Create the new resource.
-	 *   2. Remove the old resource.
-	 *   3. Transfer any properties or other data.
-	 *
-	 * Generally you should make very sure that your collection can easily move
-	 * the move.
-	 *
-	 * If you don't, just return false, which will trigger sabre/dav to handle
-	 * the move itself. If you return true from this function, the assumption
-	 * is that the move was successful.
-	 *
-	 * @param string $targetName New local file/collection name.
-	 * @param string $fullSourcePath Full path to source node
-	 * @param INode $sourceNode Source node itself
-	 * @return bool
-	 * @throws BadRequest
-	 * @throws ServiceUnavailable
-	 * @throws Forbidden
-	 * @throws FileLocked
-	 * @throws \Sabre\DAV\Exception\Forbidden
-	 */
-	public function moveInto($targetName, $fullSourcePath, INode $sourceNode) {
-		if (!$sourceNode instanceof Node) {
-			// it's a file of another kind, like FutureFile
-			if ($sourceNode instanceof IFile) {
-				// fallback to default copy+delete handling
-				return false;
-			}
-			throw new BadRequest('Incompatible node types');
-		}
-
-		if (!$this->fileView) {
-			throw new ServiceUnavailable('filesystem not setup');
-		}
-
-		$destinationPath = $this->getPath() . '/' . $targetName;
-
-
-		$targetNodeExists = $this->childExists($targetName);
-
-		// at getNodeForPath we also check the path for isForbiddenFileOrDir
-		// with that we have covered both source and destination
-		if ($sourceNode instanceof Directory && $targetNodeExists) {
-			throw new \Sabre\DAV\Exception\Forbidden('Could not copy directory ' . $sourceNode->getName() . ', target exists');
-		}
-
-		[$sourceDir,] = \Sabre\Uri\split($sourceNode->getPath());
-		$destinationDir = $this->getPath();
-
-		$sourcePath = $sourceNode->getPath();
-
-		$isMovableMount = false;
-		$sourceMount = \OC::$server->getMountManager()->find($this->fileView->getAbsolutePath($sourcePath));
-		$internalPath = $sourceMount->getInternalPath($this->fileView->getAbsolutePath($sourcePath));
-		if ($sourceMount instanceof MoveableMount && $internalPath === '') {
-			$isMovableMount = true;
-		}
-
-		try {
-			$sameFolder = ($sourceDir === $destinationDir);
-			// if we're overwriting or same folder
-			if ($targetNodeExists || $sameFolder) {
-				// note that renaming a share mount point is always allowed
-				if (!$this->fileView->isUpdatable($destinationDir) && !$isMovableMount) {
-					throw new \Sabre\DAV\Exception\Forbidden();
-				}
-			} else {
-				if (!$this->fileView->isCreatable($destinationDir)) {
-					throw new \Sabre\DAV\Exception\Forbidden();
-				}
-			}
-
-			if (!$sameFolder) {
-				// moving to a different folder, source will be gone, like a deletion
-				// note that moving a share mount point is always allowed
-				if (!$this->fileView->isDeletable($sourcePath) && !$isMovableMount) {
-					throw new \Sabre\DAV\Exception\Forbidden();
-				}
-			}
-
-			$fileName = basename($destinationPath);
-			try {
-				$this->fileView->verifyPath($destinationDir, $fileName);
-			} catch (InvalidPathException $ex) {
-				throw new InvalidPath($ex->getMessage());
-			}
-
-			$renameOkay = $this->fileView->rename($sourcePath, $destinationPath);
-			if (!$renameOkay) {
-				throw new \Sabre\DAV\Exception\Forbidden('');
-			}
-		} catch (StorageNotAvailableException $e) {
-			throw new ServiceUnavailable($e->getMessage());
-		} catch (ForbiddenException $ex) {
-			throw new Forbidden($ex->getMessage(), $ex->getRetry());
-		} catch (LockedException $e) {
-			throw new FileLocked($e->getMessage(), $e->getCode(), $e);
-		}
-
-		return true;
-	}
-
-
-	public function copyInto($targetName, $sourcePath, INode $sourceNode) {
-		if ($sourceNode instanceof File || $sourceNode instanceof Directory) {
-			$destinationPath = $this->getPath() . '/' . $targetName;
-			$sourcePath = $sourceNode->getPath();
-
-			if (!$this->fileView->isCreatable($this->getPath())) {
-				throw new \Sabre\DAV\Exception\Forbidden();
-			}
-
-			try {
-				$this->fileView->verifyPath($this->getPath(), $targetName);
-			} catch (InvalidPathException $ex) {
-				throw new InvalidPath($ex->getMessage());
-			}
-
-			return $this->fileView->copy($sourcePath, $destinationPath);
-		}
-
-		return false;
-	}
+    /**
+     * Cached directory content
+     *
+     * @var \OCP\Files\FileInfo[]
+     */
+    private $dirContent;
+
+    /**
+     * Cached quota info
+     *
+     * @var array
+     */
+    private $quotaInfo;
+
+    /**
+     * @var ObjectTree|null
+     */
+    private $tree;
+
+    /**
+     * Sets up the node, expects a full path name
+     *
+     * @param \OC\Files\View $view
+     * @param \OCP\Files\FileInfo $info
+     * @param ObjectTree|null $tree
+     * @param \OCP\Share\IManager $shareManager
+     */
+    public function __construct(View $view, FileInfo $info, $tree = null, $shareManager = null) {
+        parent::__construct($view, $info, $shareManager);
+        $this->tree = $tree;
+    }
+
+    /**
+     * Creates a new file in the directory
+     *
+     * Data will either be supplied as a stream resource, or in certain cases
+     * as a string. Keep in mind that you may have to support either.
+     *
+     * After successful creation of the file, you may choose to return the ETag
+     * of the new file here.
+     *
+     * The returned ETag must be surrounded by double-quotes (The quotes should
+     * be part of the actual string).
+     *
+     * If you cannot accurately determine the ETag, you should not return it.
+     * If you don't store the file exactly as-is (you're transforming it
+     * somehow) you should also not return an ETag.
+     *
+     * This means that if a subsequent GET to this new file does not exactly
+     * return the same contents of what was submitted here, you are strongly
+     * recommended to omit the ETag.
+     *
+     * @param string $name Name of the file
+     * @param resource|string $data Initial payload
+     * @return null|string
+     * @throws Exception\EntityTooLarge
+     * @throws Exception\UnsupportedMediaType
+     * @throws FileLocked
+     * @throws InvalidPath
+     * @throws \Sabre\DAV\Exception
+     * @throws \Sabre\DAV\Exception\BadRequest
+     * @throws \Sabre\DAV\Exception\Forbidden
+     * @throws \Sabre\DAV\Exception\ServiceUnavailable
+     */
+    public function createFile($name, $data = null) {
+        try {
+            // for chunked upload also updating a existing file is a "createFile"
+            // because we create all the chunks before re-assemble them to the existing file.
+            if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
+
+                // exit if we can't create a new file and we don't updatable existing file
+                $chunkInfo = \OC_FileChunking::decodeName($name);
+                if (!$this->fileView->isCreatable($this->path) &&
+                    !$this->fileView->isUpdatable($this->path . '/' . $chunkInfo['name'])
+                ) {
+                    throw new \Sabre\DAV\Exception\Forbidden();
+                }
+            } else {
+                // For non-chunked upload it is enough to check if we can create a new file
+                if (!$this->fileView->isCreatable($this->path)) {
+                    throw new \Sabre\DAV\Exception\Forbidden();
+                }
+            }
+
+            $this->fileView->verifyPath($this->path, $name);
+
+            $path = $this->fileView->getAbsolutePath($this->path) . '/' . $name;
+            // in case the file already exists/overwriting
+            $info = $this->fileView->getFileInfo($this->path . '/' . $name);
+            if (!$info) {
+                // use a dummy FileInfo which is acceptable here since it will be refreshed after the put is complete
+                $info = new \OC\Files\FileInfo($path, null, null, [], null);
+            }
+            $node = new \OCA\DAV\Connector\Sabre\File($this->fileView, $info);
+
+            // only allow 1 process to upload a file at once but still allow reading the file while writing the part file
+            $node->acquireLock(ILockingProvider::LOCK_SHARED);
+            $this->fileView->lockFile($path . '.upload.part', ILockingProvider::LOCK_EXCLUSIVE);
+
+            $result = $node->put($data);
+
+            $this->fileView->unlockFile($path . '.upload.part', ILockingProvider::LOCK_EXCLUSIVE);
+            $node->releaseLock(ILockingProvider::LOCK_SHARED);
+            return $result;
+        } catch (\OCP\Files\StorageNotAvailableException $e) {
+            throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage(), $e->getCode(), $e);
+        } catch (InvalidPathException $ex) {
+            throw new InvalidPath($ex->getMessage(), false, $ex);
+        } catch (ForbiddenException $ex) {
+            throw new Forbidden($ex->getMessage(), $ex->getRetry(), $ex);
+        } catch (LockedException $e) {
+            throw new FileLocked($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    /**
+     * Creates a new subdirectory
+     *
+     * @param string $name
+     * @throws FileLocked
+     * @throws InvalidPath
+     * @throws \Sabre\DAV\Exception\Forbidden
+     * @throws \Sabre\DAV\Exception\ServiceUnavailable
+     */
+    public function createDirectory($name) {
+        try {
+            if (!$this->info->isCreatable()) {
+                throw new \Sabre\DAV\Exception\Forbidden();
+            }
+
+            $this->fileView->verifyPath($this->path, $name);
+            $newPath = $this->path . '/' . $name;
+            if (!$this->fileView->mkdir($newPath)) {
+                throw new \Sabre\DAV\Exception\Forbidden('Could not create directory ' . $newPath);
+            }
+        } catch (\OCP\Files\StorageNotAvailableException $e) {
+            throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage());
+        } catch (InvalidPathException $ex) {
+            throw new InvalidPath($ex->getMessage());
+        } catch (ForbiddenException $ex) {
+            throw new Forbidden($ex->getMessage(), $ex->getRetry());
+        } catch (LockedException $e) {
+            throw new FileLocked($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    /**
+     * Returns a specific child node, referenced by its name
+     *
+     * @param string $name
+     * @param \OCP\Files\FileInfo $info
+     * @return \Sabre\DAV\INode
+     * @throws InvalidPath
+     * @throws \Sabre\DAV\Exception\NotFound
+     * @throws \Sabre\DAV\Exception\ServiceUnavailable
+     */
+    public function getChild($name, $info = null) {
+        if (!$this->info->isReadable()) {
+            // avoid detecting files through this way
+            throw new NotFound();
+        }
+
+        $path = $this->path . '/' . $name;
+        if (is_null($info)) {
+            try {
+                $this->fileView->verifyPath($this->path, $name);
+                $info = $this->fileView->getFileInfo($path);
+            } catch (\OCP\Files\StorageNotAvailableException $e) {
+                throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage());
+            } catch (InvalidPathException $ex) {
+                throw new InvalidPath($ex->getMessage());
+            } catch (ForbiddenException $e) {
+                throw new \Sabre\DAV\Exception\Forbidden();
+            }
+        }
+
+        if (!$info) {
+            throw new \Sabre\DAV\Exception\NotFound('File with name ' . $path . ' could not be located');
+        }
+
+        if ($info['mimetype'] === 'httpd/unix-directory') {
+            $node = new \OCA\DAV\Connector\Sabre\Directory($this->fileView, $info, $this->tree, $this->shareManager);
+        } else {
+            $node = new \OCA\DAV\Connector\Sabre\File($this->fileView, $info, $this->shareManager);
+        }
+        if ($this->tree) {
+            $this->tree->cacheNode($node);
+        }
+        return $node;
+    }
+
+    /**
+     * Returns an array with all the child nodes
+     *
+     * @return \Sabre\DAV\INode[]
+     * @throws \Sabre\DAV\Exception\Locked
+     * @throws \OCA\DAV\Connector\Sabre\Exception\Forbidden
+     */
+    public function getChildren() {
+        if (!is_null($this->dirContent)) {
+            return $this->dirContent;
+        }
+        try {
+            if (!$this->info->isReadable()) {
+                // return 403 instead of 404 because a 404 would make
+                // the caller believe that the collection itself does not exist
+                throw new Forbidden('No read permissions');
+            }
+            $folderContent = $this->fileView->getDirectoryContent($this->path);
+        } catch (LockedException $e) {
+            throw new Locked();
+        }
+
+        $nodes = [];
+        foreach ($folderContent as $info) {
+            $node = $this->getChild($info->getName(), $info);
+            $nodes[] = $node;
+        }
+        $this->dirContent = $nodes;
+        return $this->dirContent;
+    }
+
+    /**
+     * Checks if a child exists.
+     *
+     * @param string $name
+     * @return bool
+     */
+    public function childExists($name) {
+        // note: here we do NOT resolve the chunk file name to the real file name
+        // to make sure we return false when checking for file existence with a chunk
+        // file name.
+        // This is to make sure that "createFile" is still triggered
+        // (required old code) instead of "updateFile".
+        //
+        // TODO: resolve chunk file name here and implement "updateFile"
+        $path = $this->path . '/' . $name;
+        return $this->fileView->file_exists($path);
+    }
+
+    /**
+     * Deletes all files in this directory, and then itself
+     *
+     * @return void
+     * @throws FileLocked
+     * @throws \Sabre\DAV\Exception\Forbidden
+     */
+    public function delete() {
+        if ($this->path === '' || $this->path === '/' || !$this->info->isDeletable()) {
+            throw new \Sabre\DAV\Exception\Forbidden();
+        }
+
+        try {
+            if (!$this->fileView->rmdir($this->path)) {
+                // assume it wasn't possible to remove due to permission issue
+                throw new \Sabre\DAV\Exception\Forbidden();
+            }
+        } catch (ForbiddenException $ex) {
+            throw new Forbidden($ex->getMessage(), $ex->getRetry());
+        } catch (LockedException $e) {
+            throw new FileLocked($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    /**
+     * Returns available diskspace information
+     *
+     * @return array
+     */
+    public function getQuotaInfo() {
+        if ($this->quotaInfo) {
+            return $this->quotaInfo;
+        }
+        try {
+            $storageInfo = \OC_Helper::getStorageInfo($this->info->getPath(), $this->info, false);
+            if ($storageInfo['quota'] === \OCP\Files\FileInfo::SPACE_UNLIMITED) {
+                $free = \OCP\Files\FileInfo::SPACE_UNLIMITED;
+            } else {
+                $free = $storageInfo['free'];
+            }
+            $this->quotaInfo = [
+                $storageInfo['used'],
+                $free
+            ];
+            return $this->quotaInfo;
+        } catch (\OCP\Files\NotFoundException $e) {
+            return [0, 0];
+        } catch (\OCP\Files\StorageNotAvailableException $e) {
+            return [0, 0];
+        } catch (NotPermittedException $e) {
+            return [0, 0];
+        }
+    }
+
+    /**
+     * Moves a node into this collection.
+     *
+     * It is up to the implementors to:
+     *   1. Create the new resource.
+     *   2. Remove the old resource.
+     *   3. Transfer any properties or other data.
+     *
+     * Generally you should make very sure that your collection can easily move
+     * the move.
+     *
+     * If you don't, just return false, which will trigger sabre/dav to handle
+     * the move itself. If you return true from this function, the assumption
+     * is that the move was successful.
+     *
+     * @param string $targetName New local file/collection name.
+     * @param string $fullSourcePath Full path to source node
+     * @param INode $sourceNode Source node itself
+     * @return bool
+     * @throws BadRequest
+     * @throws ServiceUnavailable
+     * @throws Forbidden
+     * @throws FileLocked
+     * @throws \Sabre\DAV\Exception\Forbidden
+     */
+    public function moveInto($targetName, $fullSourcePath, INode $sourceNode) {
+        if (!$sourceNode instanceof Node) {
+            // it's a file of another kind, like FutureFile
+            if ($sourceNode instanceof IFile) {
+                // fallback to default copy+delete handling
+                return false;
+            }
+            throw new BadRequest('Incompatible node types');
+        }
+
+        if (!$this->fileView) {
+            throw new ServiceUnavailable('filesystem not setup');
+        }
+
+        $destinationPath = $this->getPath() . '/' . $targetName;
+
+
+        $targetNodeExists = $this->childExists($targetName);
+
+        // at getNodeForPath we also check the path for isForbiddenFileOrDir
+        // with that we have covered both source and destination
+        if ($sourceNode instanceof Directory && $targetNodeExists) {
+            throw new \Sabre\DAV\Exception\Forbidden('Could not copy directory ' . $sourceNode->getName() . ', target exists');
+        }
+
+        [$sourceDir,] = \Sabre\Uri\split($sourceNode->getPath());
+        $destinationDir = $this->getPath();
+
+        $sourcePath = $sourceNode->getPath();
+
+        $isMovableMount = false;
+        $sourceMount = \OC::$server->getMountManager()->find($this->fileView->getAbsolutePath($sourcePath));
+        $internalPath = $sourceMount->getInternalPath($this->fileView->getAbsolutePath($sourcePath));
+        if ($sourceMount instanceof MoveableMount && $internalPath === '') {
+            $isMovableMount = true;
+        }
+
+        try {
+            $sameFolder = ($sourceDir === $destinationDir);
+            // if we're overwriting or same folder
+            if ($targetNodeExists || $sameFolder) {
+                // note that renaming a share mount point is always allowed
+                if (!$this->fileView->isUpdatable($destinationDir) && !$isMovableMount) {
+                    throw new \Sabre\DAV\Exception\Forbidden();
+                }
+            } else {
+                if (!$this->fileView->isCreatable($destinationDir)) {
+                    throw new \Sabre\DAV\Exception\Forbidden();
+                }
+            }
+
+            if (!$sameFolder) {
+                // moving to a different folder, source will be gone, like a deletion
+                // note that moving a share mount point is always allowed
+                if (!$this->fileView->isDeletable($sourcePath) && !$isMovableMount) {
+                    throw new \Sabre\DAV\Exception\Forbidden();
+                }
+            }
+
+            $fileName = basename($destinationPath);
+            try {
+                $this->fileView->verifyPath($destinationDir, $fileName);
+            } catch (InvalidPathException $ex) {
+                throw new InvalidPath($ex->getMessage());
+            }
+
+            $renameOkay = $this->fileView->rename($sourcePath, $destinationPath);
+            if (!$renameOkay) {
+                throw new \Sabre\DAV\Exception\Forbidden('');
+            }
+        } catch (StorageNotAvailableException $e) {
+            throw new ServiceUnavailable($e->getMessage());
+        } catch (ForbiddenException $ex) {
+            throw new Forbidden($ex->getMessage(), $ex->getRetry());
+        } catch (LockedException $e) {
+            throw new FileLocked($e->getMessage(), $e->getCode(), $e);
+        }
+
+        return true;
+    }
+
+
+    public function copyInto($targetName, $sourcePath, INode $sourceNode) {
+        if ($sourceNode instanceof File || $sourceNode instanceof Directory) {
+            $destinationPath = $this->getPath() . '/' . $targetName;
+            $sourcePath = $sourceNode->getPath();
+
+            if (!$this->fileView->isCreatable($this->getPath())) {
+                throw new \Sabre\DAV\Exception\Forbidden();
+            }
+
+            try {
+                $this->fileView->verifyPath($this->getPath(), $targetName);
+            } catch (InvalidPathException $ex) {
+                throw new InvalidPath($ex->getMessage());
+            }
+
+            return $this->fileView->copy($sourcePath, $destinationPath);
+        }
+
+        return false;
+    }
 }