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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2020 Robin Appelman <robin@icewind.nl>
*
* @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\Files_External\Lib\Storage;
/**
* Low level wrapper around the ftp functions that smooths over some difference between servers
*/
class FtpConnection {
/** @var resource|\FTP\Connection */
private $connection;
public function __construct(bool $secure, string $hostname, int $port, string $username, string $password) {
if ($secure) {
$connection = ftp_ssl_connect($hostname, $port);
} else {
$connection = ftp_connect($hostname, $port);
}
if ($connection === false) {
throw new \Exception("Failed to connect to ftp");
}
if (ftp_login($connection, $username, $password) === false) {
throw new \Exception("Failed to connect to login to ftp");
}
ftp_pasv($connection, true);
$this->connection = $connection;
}
public function __destruct() {
if ($this->connection) {
ftp_close($this->connection);
}
$this->connection = null;
}
public function setUtf8Mode(): bool {
$response = ftp_raw($this->connection, "OPTS UTF8 ON");
return substr($response[0], 0, 3) === '200';
}
public function fput(string $path, $handle) {
return @ftp_fput($this->connection, $path, $handle, FTP_BINARY);
}
public function fget($handle, string $path) {
return @ftp_fget($this->connection, $handle, $path, FTP_BINARY);
}
public function mkdir(string $path) {
return @ftp_mkdir($this->connection, $path);
}
public function chdir(string $path) {
return @ftp_chdir($this->connection, $path);
}
public function delete(string $path) {
return @ftp_delete($this->connection, $path);
}
public function rmdir(string $path) {
return @ftp_rmdir($this->connection, $path);
}
public function rename(string $source, string $target) {
return @ftp_rename($this->connection, $source, $target);
}
public function mdtm(string $path): int {
$result = @ftp_mdtm($this->connection, $path);
// filezilla doesn't like empty path with mdtm
if ($result === -1 && $path === "") {
$result = @ftp_mdtm($this->connection, "/");
}
return $result;
}
public function size(string $path) {
return @ftp_size($this->connection, $path);
}
public function systype() {
return @ftp_systype($this->connection);
}
public function nlist(string $path) {
$files = @ftp_nlist($this->connection, $path);
return array_map(function ($name) {
if (strpos($name, '/') !== false) {
$name = basename($name);
}
return $name;
}, $files);
}
public function mlsd(string $path) {
$files = @ftp_mlsd($this->connection, $path);
if ($files !== false) {
return array_map(function ($file) {
if (strpos($file['name'], '/') !== false) {
$file['name'] = basename($file['name']);
}
return $file;
}, $files);
} else {
// not all servers support mlsd, in those cases we parse the raw list ourselves
$rawList = @ftp_rawlist($this->connection, '-aln ' . $path);
if ($rawList === false) {
return false;
}
return $this->parseRawList($rawList, $path);
}
}
// rawlist parsing logic is based on the ftp implementation from https://github.com/thephpleague/flysystem
private function parseRawList(array $rawList, string $directory): array {
return array_map(function ($item) use ($directory) {
return $this->parseRawListItem($item, $directory);
}, $rawList);
}
private function parseRawListItem(string $item, string $directory): array {
$isWindows = preg_match('/^[0-9]{2,4}-[0-9]{2}-[0-9]{2}/', $item);
return $isWindows ? $this->parseWindowsItem($item, $directory) : $this->parseUnixItem($item, $directory);
}
private function parseUnixItem(string $item, string $directory): array {
$item = preg_replace('#\s+#', ' ', $item, 7);
if (count(explode(' ', $item, 9)) !== 9) {
throw new \RuntimeException("Metadata can't be parsed from item '$item' , not enough parts.");
}
[$permissions, /* $number */, /* $owner */, /* $group */, $size, $month, $day, $time, $name] = explode(' ', $item, 9);
if ($name === '.') {
$type = 'cdir';
} elseif ($name === '..') {
$type = 'pdir';
} else {
$type = substr($permissions, 0, 1) === 'd' ? 'dir' : 'file';
}
$parsedDate = (new \DateTime())
->setTimestamp(strtotime("$month $day $time"));
$tomorrow = (new \DateTime())->add(new \DateInterval("P1D"));
// since the provided date doesn't include the year, we either set it to the correct year
// or when the date would otherwise be in the future (by more then 1 day to account for timezone errors)
// we use last year
if ($parsedDate > $tomorrow) {
$parsedDate = $parsedDate->sub(new \DateInterval("P1Y"));
}
$formattedDate = $parsedDate
->format('YmdHis');
return [
'type' => $type,
'name' => $name,
'modify' => $formattedDate,
'perm' => $this->normalizePermissions($permissions),
'size' => (int)$size,
];
}
private function normalizePermissions(string $permissions) {
$isDir = substr($permissions, 0, 1) === 'd';
// remove the type identifier and only use owner permissions
$permissions = substr($permissions, 1, 4);
// map the string rights to the ftp counterparts
$filePermissionsMap = ['r' => 'r', 'w' => 'fadfw'];
$dirPermissionsMap = ['r' => 'e', 'w' => 'flcdmp'];
$map = $isDir ? $dirPermissionsMap : $filePermissionsMap;
return array_reduce(str_split($permissions), function ($ftpPermissions, $permission) use ($map) {
if (isset($map[$permission])) {
$ftpPermissions .= $map[$permission];
}
return $ftpPermissions;
}, '');
}
private function parseWindowsItem(string $item, string $directory): array {
$item = preg_replace('#\s+#', ' ', trim($item), 3);
if (count(explode(' ', $item, 4)) !== 4) {
throw new \RuntimeException("Metadata can't be parsed from item '$item' , not enough parts.");
}
[$date, $time, $size, $name] = explode(' ', $item, 4);
// Check for the correct date/time format
$format = strlen($date) === 8 ? 'm-d-yH:iA' : 'Y-m-dH:i';
$formattedDate = \DateTime::createFromFormat($format, $date . $time)->format('YmdGis');
if ($name === '.') {
$type = 'cdir';
} elseif ($name === '..') {
$type = 'pdir';
} else {
$type = ($size === '<DIR>') ? 'dir' : 'file';
}
return [
'type' => $type,
'name' => $name,
'modify' => $formattedDate,
'perm' => ($type === 'file') ? 'adfrw' : 'flcdmpe',
'size' => (int)$size,
];
}
}
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