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<?php
/**
 * Part of the Joomla Framework Filesystem Package
 *
 * @copyright  Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\Filesystem\Clients;

use Joomla\Filesystem\Exception\FilesystemException;

/*
 * Error Codes:
 * - 30 : Unable to connect to host
 * - 31 : Not connected
 * - 32 : Unable to send command to server
 * - 33 : Bad username
 * - 34 : Bad password
 * - 35 : Bad response
 * - 36 : Passive mode failed
 * - 37 : Data transfer error
 * - 38 : Local filesystem error
 */

if (!\defined('CRLF'))
{
	\define('CRLF', "\r\n");
}

if (!\defined('FTP_AUTOASCII'))
{
	\define('FTP_AUTOASCII', -1);
}

if (!\defined('FTP_BINARY'))
{
	\define('FTP_BINARY', 1);
}

if (!\defined('FTP_ASCII'))
{
	\define('FTP_ASCII', 0);
}

if (!\defined('FTP_NATIVE'))
{
	\define('FTP_NATIVE', (\function_exists('ftp_connect')) ? 1 : 0);
}

/**
 * FTP client class
 *
 * @since  1.0
 */
class FtpClient
{
	/**
	 * Socket resource
	 *
	 * @var    resource
	 * @since  1.0
	 */
	private $conn;

/**
	 * Data port connection resource
	 *
	 * @var    resource
	 * @since  1.0
	 */
	private $dataconn;

/**
	 * Passive connection information
	 *
	 * @var    array
	 * @since  1.0
	 */
	private $pasv;

/**
	 * Response Message
	 *
	 * @var    string
	 * @since  1.0
	 */
	private $response;

/**
	 * Response Code
	 *
	 * @var    integer
	 * @since  1.0
	 */
	private $responseCode;

/**
	 * Response Message
	 *
	 * @var    string
	 * @since  1.0
	 */
	private $responseMsg;

/**
	 * Timeout limit
	 *
	 * @var    integer
	 * @since  1.0
	 */
	private $timeout = 15;

/**
	 * Transfer Type
	 *
	 * @var    integer
	 * @since  1.0
	 */
	private $type;

/**
	 * Array to hold ascii format file extensions
	 *
	 * @var    array
	 * @since  1.0
	 */
	private $autoAscii = [
		'asp',
		'bat',
		'c',
		'cpp',
		'csv',
		'h',
		'htm',
		'html',
		'shtml',
		'ini',
		'inc',
		'log',
		'php',
		'php3',
		'pl',
		'perl',
		'sh',
		'sql',
		'txt',
		'xhtml',
		'xml',
	];

/**
	 * Array to hold native line ending characters
	 *
	 * @var    array
	 * @since  1.0
	 */
	private $lineEndings = ['UNIX' => "\n", 'WIN' => "\r\n"];

/**
	 * FtpClient instances container.
	 *
	 * @var    FtpClient[]
	 * @since  1.0
	 */
	protected static $instances = [];

/**
	 * FtpClient object constructor
	 *
	 * @param   array  $options  Associative array of options to set
	 *
	 * @since   1.0
	 */
	public function __construct(array $options = [])
	{
		// If default transfer type is not set, set it to autoascii detect
		if (!isset($options['type']))
		{
			$options['type'] = \FTP_BINARY;
		}

$this->setOptions($options);

if (FTP_NATIVE)
		{
			// Autoloading fails for Buffer as the class is used as a stream handler
			class_exists('Joomla\\Filesystem\\Buffer');
		}
	}

/**
	 * FtpClient object destructor
	 *
	 * Closes an existing connection, if we have one
	 *
	 * @since   1.0
	 */
	public function __destruct()
	{
		if (\is_resource($this->conn))
		{
			$this->quit();
		}
	}

/**
	 * Returns the global FTP connector object, only creating it
	 * if it doesn't already exist.
	 *
	 * You may optionally specify a username and password in the parameters. If you do so,
	 * you may not login() again with different credentials using the same object.
	 * If you do not use this option, you must quit() the current connection when you
	 * are done, to free it for use by others.
	 *
	 * @param   string  $host     Host to connect to
	 * @param   string  $port     Port to connect to
	 * @param   array   $options  Array with any of these options: type=>[FTP_AUTOASCII|FTP_ASCII|FTP_BINARY], timeout=>(int)
	 * @param   string  $user     Username to use for a connection
	 * @param   string  $pass     Password to use for a connection
	 *
	 * @return  FtpClient  The FTP Client object.
	 *
	 * @since   1.0
	 */
	public static function getInstance($host = '127.0.0.1', $port = '21', array $options = [], $user = null, $pass = null)
	{
		$signature = $user . ':' . $pass . '@' . $host . ':' . $port;

// Create a new instance, or set the options of an existing one
		if (!isset(self::$instances[$signature]) || !\is_object(self::$instances[$signature]))
		{
			self::$instances[$signature] = new static($options);
		}
		else
		{
			self::$instances[$signature]->setOptions($options);
		}

// Connect to the server, and login, if requested
		if (!self::$instances[$signature]->isConnected())
		{
			$return = self::$instances[$signature]->connect($host, $port);

if ($return && $user !== null && $pass !== null)
			{
				self::$instances[$signature]->login($user, $pass);
			}
		}

return self::$instances[$signature];
	}

/**
	 * Set client options
	 *
	 * @param   array  $options  Associative array of options to set
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 */
	public function setOptions(array $options)
	{
		if (isset($options['type']))
		{
			$this->type = $options['type'];
		}

if (isset($options['timeout']))
		{
			$this->timeout = $options['timeout'];
		}

return true;
	}

/**
	 * Method to connect to a FTP server
	 *
	 * @param   string   $host  Host to connect to [Default: 127.0.0.1]
	 * @param   integer  $port  Port to connect on [Default: port 21]
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function connect($host = '127.0.0.1', $port = 21)
	{
		$errno = null;
		$err   = null;

// If already connected, return
		if (\is_resource($this->conn))
		{
			return true;
		}

// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			$this->conn = @ftp_connect($host, $port, $this->timeout);

if ($this->conn === false)
			{
				throw new FilesystemException(sprintf('%1$s: Could not connect to host " %2$s " on port " %3$s "', __METHOD__, $host, $port));
			}

// Set the timeout for this connection
			ftp_set_option($this->conn, \FTP_TIMEOUT_SEC, $this->timeout);

return true;
		}

// Connect to the FTP server.
		$this->conn = @ fsockopen($host, $port, $errno, $err, $this->timeout);

if (!$this->conn)
		{
			throw new FilesystemException(
				sprintf(
					'%1$s: Could not connect to host " %2$s " on port " %3$s ". Socket error number: %4$s and error message: %5$s',
					__METHOD__,
					$host,
					$port,
					$errno,
					$err
				)
			);
		}

// Set the timeout for this connection
		socket_set_timeout($this->conn, $this->timeout, 0);

// Check for welcome response code
		if (!$this->_verifyResponse(220))
		{
			throw new FilesystemException(sprintf('%1$s: Bad response. Server response: %2$s [Expected: 220]', __METHOD__, $this->response));
		}

return true;
	}

/**
	 * Method to determine if the object is connected to an FTP server
	 *
	 * @return  boolean  True if connected
	 *
	 * @since   1.0
	 */
	public function isConnected()
	{
		return \is_resource($this->conn);
	}

/**
	 * Method to login to a server once connected
	 *
	 * @param   string  $user  Username to login to the server
	 * @param   string  $pass  Password to login to the server
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function login($user = 'anonymous', $pass = 'jftp@joomla.org')
	{
		// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			if (@ftp_login($this->conn, $user, $pass) === false)
			{
				throw new FilesystemException(__METHOD__ . ': Unable to login');
			}

return true;
		}

// Send the username
		if (!$this->_putCmd('USER ' . $user, [331, 503]))
		{
			throw new FilesystemException(
				sprintf('%1$s: Bad Username. Server response: %2$s [Expected: 331]. Username sent: %3$s', __METHOD__, $this->response, $user)
			);
		}

// If we are already logged in, continue :)
		if ($this->responseCode == 503)
		{
			return true;
		}

// Send the password
		if (!$this->_putCmd('PASS ' . $pass, 230))
		{
			throw new FilesystemException(sprintf('%1$s: Bad Password. Server response: %2$s [Expected: 230].', __METHOD__, $this->response));
		}

return true;
	}

/**
	 * Method to quit and close the connection
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 */
	public function quit()
	{
		// If native FTP support is enabled lets use it...
		if (FTP_NATIVE)
		{
			@ftp_close($this->conn);

return true;
		}

// Logout and close connection
		@fwrite($this->conn, "QUIT\r\n");
		@fclose($this->conn);

return true;
	}

/**
	 * Method to retrieve the current working directory on the FTP server
	 *
	 * @return  string   Current working directory
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function pwd()
	{
		// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			if (($ret = @ftp_pwd($this->conn)) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

return $ret;
		}

$match = [null];

// Send print working directory command and verify success
		if (!$this->_putCmd('PWD', 257))
		{
			throw new FilesystemException(sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 257]', __METHOD__, $this->response));
		}

// Match just the path
		preg_match('/"[^"\r\n]*"/', $this->response, $match);

// Return the cleaned path
		return preg_replace('/"/', '', $match[0]);
	}

/**
	 * Method to system string from the FTP server
	 *
	 * @return  string   System identifier string
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function syst()
	{
		// If native FTP support is enabled lets use it...
		if (FTP_NATIVE)
		{
			if (($ret = @ftp_systype($this->conn)) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}
		}
		else
		{
			// Send print working directory command and verify success
			if (!$this->_putCmd('SYST', 215))
			{
				throw new FilesystemException(sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 215]', __METHOD__, $this->response));
			}

$ret = $this->response;
		}

// Match the system string to an OS
		if (strpos(strtoupper($ret), 'MAC') !== false)
		{
			$ret = 'MAC';
		}
		elseif (strpos(strtoupper($ret), 'WIN') !== false)
		{
			$ret = 'WIN';
		}
		else
		{
			$ret = 'UNIX';
		}

// Return the os type
		return $ret;
	}

/**
	 * Method to change the current working directory on the FTP server
	 *
	 * @param   string  $path  Path to change into on the server
	 *
	 * @return  boolean True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function chdir($path)
	{
		// If native FTP support is enabled lets use it...
		if (FTP_NATIVE)
		{
			if (@ftp_chdir($this->conn, $path) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

return true;
		}

// Send change directory command and verify success
		if (!$this->_putCmd('CWD ' . $path, 250))
		{
			throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 250].  Sent path: %3$s', __METHOD__, $this->response, $path)
			);
		}

return true;
	}

/**
	 * Method to reinitialise the server, ie. need to login again
	 *
	 * NOTE: This command not available on all servers
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function reinit()
	{
		// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			if (@ftp_site($this->conn, 'REIN') === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

return true;
		}

// Send reinitialise command to the server
		if (!$this->_putCmd('REIN', 220))
		{
			throw new FilesystemException(sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 220]', __METHOD__, $this->response));
		}

return true;
	}

/**
	 * Method to rename a file/folder on the FTP server
	 *
	 * @param   string  $from  Path to change file/folder from
	 * @param   string  $to    Path to change file/folder to
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function rename($from, $to)
	{
		// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			if (@ftp_rename($this->conn, $from, $to) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

return true;
		}

// Send rename from command to the server
		if (!$this->_putCmd('RNFR ' . $from, 350))
		{
			throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 350].  From path sent: %3$s', __METHOD__, $this->response, $from)
			);
		}

// Send rename to command to the server
		if (!$this->_putCmd('RNTO ' . $to, 250))
		{
			throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 250].  To path sent: %3$s', __METHOD__, $this->response, $to)
			);
		}

return true;
	}

/**
	 * Method to change mode for a path on the FTP server
	 *
	 * @param   string  $path  Path to change mode on
	 * @param   mixed   $mode  Octal value to change mode to, e.g. '0777', 0777 or 511 (string or integer)
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function chmod($path, $mode)
	{
		// If no filename is given, we assume the current directory is the target
		if ($path == '')
		{
			$path = '.';
		}

// Convert the mode to a string
		if (\is_int($mode))
		{
			$mode = decoct($mode);
		}

// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			if (@ftp_site($this->conn, 'CHMOD ' . $mode . ' ' . $path) === false)
			{
				if (!\defined('PHP_WINDOWS_VERSION_MAJOR'))
				{
					throw new FilesystemException(__METHOD__ . 'Bad response.');
				}

return false;
			}

return true;
		}

// Send change mode command and verify success [must convert mode from octal]
		if (!$this->_putCmd('SITE CHMOD ' . $mode . ' ' . $path, [200, 250]))
		{
			if (!\defined('PHP_WINDOWS_VERSION_MAJOR'))
			{
				throw new FilesystemException(
					sprintf(
						'%1$s: Bad response.  Server response: %2$s [Expected: 250].  Path sent: %3$s.  Mode sent: %4$s',
						__METHOD__,
						$this->response,
						$path,
						$mode
					)
				);
			}

return false;
		}

return true;
	}

/**
	 * Method to delete a path [file/folder] on the FTP server
	 *
	 * @param   string  $path  Path to delete
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function delete($path)
	{
		// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			if (@ftp_delete($this->conn, $path) === false)
			{
				if (@ftp_rmdir($this->conn, $path) === false)
				{
					throw new FilesystemException(__METHOD__ . 'Bad response.');
				}
			}

return true;
		}

// Send delete file command and if that doesn't work, try to remove a directory
		if (!$this->_putCmd('DELE ' . $path, 250))
		{
			if (!$this->_putCmd('RMD ' . $path, 250))
			{
				throw new FilesystemException(
					sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 250].  Path sent: %3$s', __METHOD__, $this->response, $path)
				);
			}
		}

return true;
	}

/**
	 * Method to create a directory on the FTP server
	 *
	 * @param   string  $path  Directory to create
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function mkdir($path)
	{
		// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			if (@ftp_mkdir($this->conn, $path) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

return true;
		}

// Send change directory command and verify success
		if (!$this->_putCmd('MKD ' . $path, 257))
		{
			throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 257].  Path sent: %3$s', __METHOD__, $this->response, $path)
			);
		}

return true;
	}

/**
	 * Method to restart data transfer at a given byte
	 *
	 * @param   integer  $point  Byte to restart transfer at
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function restart($point)
	{
		// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			if (@ftp_site($this->conn, 'REST ' . $point) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

return true;
		}

// Send restart command and verify success
		if (!$this->_putCmd('REST ' . $point, 350))
		{
			throw new FilesystemException(
				sprintf(
					'%1$s: Bad response.  Server response: %2$s [Expected: 350].  Restart point sent: %3$s', __METHOD__, $this->response, $point
				)
			);
		}

return true;
	}

/**
	 * Method to create an empty file on the FTP server
	 *
	 * @param   string  $path  Path local file to store on the FTP server
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function create($path)
	{
		// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			// Turn passive mode on
			if (@ftp_pasv($this->conn, true) === false)
			{
				throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
			}

$buffer = fopen('buffer://tmp', 'r');

if (@ftp_fput($this->conn, $path, $buffer, \FTP_ASCII) === false)
			{
				fclose($buffer);

throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

fclose($buffer);

return true;
		}

// Start passive mode
		if (!$this->_passive())
		{
			throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
		}

if (!$this->_putCmd('STOR ' . $path, [150, 125]))
		{
			@ fclose($this->dataconn);

throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 150 or 125].  Path sent: %3$s', __METHOD__, $this->response, $path)
			);
		}

// To create a zero byte upload close the data port connection
		fclose($this->dataconn);

if (!$this->_verifyResponse(226))
		{
			throw new FilesystemException(
				sprintf('%1$s: Transfer failed.  Server response: %2$s [Expected: 226].  Path sent: %3$s', __METHOD__, $this->response, $path)
			);
		}

return true;
	}

/**
	 * Method to read a file from the FTP server's contents into a buffer
	 *
	 * @param   string  $remote  Path to remote file to read on the FTP server
	 * @param   string  $buffer  Buffer variable to read file contents into
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function read($remote, &$buffer)
	{
		// Determine file type
		$mode = $this->_findMode($remote);

// If native FTP support is enabled let's use it...
		if (FTP_NATIVE)
		{
			// Turn passive mode on
			if (@ftp_pasv($this->conn, true) === false)
			{
				throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
			}

$tmp = fopen('buffer://tmp', 'br+');

if (@ftp_fget($this->conn, $tmp, $remote, $mode) === false)
			{
				fclose($tmp);

throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

// Read tmp buffer contents
			rewind($tmp);
			$buffer = '';

while (!feof($tmp))
			{
				$buffer .= fread($tmp, 8192);
			}

fclose($tmp);

return true;
		}

$this->_mode($mode);

// Start passive mode
		if (!$this->_passive())
		{
			throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
		}

if (!$this->_putCmd('RETR ' . $remote, [150, 125]))
		{
			@ fclose($this->dataconn);

throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 150 or 125].  Path sent: %3$s', __METHOD__, $this->response, $remote)
			);
		}

// Read data from data port connection and add to the buffer
		$buffer = '';

while (!feof($this->dataconn))
		{
			$buffer .= fread($this->dataconn, 4096);
		}

// Close the data port connection
		fclose($this->dataconn);

// Let's try to cleanup some line endings if it is ascii
		if ($mode == \FTP_ASCII)
		{
			$os = 'UNIX';

if (\defined('PHP_WINDOWS_VERSION_MAJOR'))
			{
				$os = 'WIN';
			}

$buffer = preg_replace('/' . CRLF . '/', $this->lineEndings[$os], $buffer);
		}

if (!$this->_verifyResponse(226))
		{
			throw new FilesystemException(
				sprintf(
					'%1$s: Transfer failed.  Server response: %2$s [Expected: 226].  Restart point sent: %3$s',
					__METHOD__, $this->response, $remote
				)
			);
		}

return true;
	}

/**
	 * Method to get a file from the FTP server and save it to a local file
	 *
	 * @param   string  $local   Local path to save remote file to
	 * @param   string  $remote  Path to remote file to get on the FTP server
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function get($local, $remote)
	{
		// Determine file type
		$mode = $this->_findMode($remote);

if (@ftp_get($this->conn, $local, $remote, $mode) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

return true;
		}

$this->_mode($mode);

// Check to see if the local file can be opened for writing
		$fp = fopen($local, 'wb');

if (!$fp)
		{
			throw new FilesystemException(sprintf('%1$s: Unable to open local file for writing.  Local path: %2$s', __METHOD__, $local));
		}

// Start passive mode
		if (!$this->_passive())
		{
			throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
		}

if (!$this->_putCmd('RETR ' . $remote, [150, 125]))
		{
			@ fclose($this->dataconn);

throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 150 or 125].  Path sent: %3$s', __METHOD__, $this->response, $remote)
			);
		}

// Read data from data port connection and add to the buffer
		while (!feof($this->dataconn))
		{
			$buffer = fread($this->dataconn, 4096);
			fwrite($fp, $buffer, 4096);
		}

// Close the data port connection and file pointer
		fclose($this->dataconn);
		fclose($fp);

return true;
	}

/**
	 * Method to store a file to the FTP server
	 *
	 * @param   string  $local   Path to local file to store on the FTP server
	 * @param   string  $remote  FTP path to file to create
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function store($local, $remote = null)
	{
		// If remote file is not given, use the filename of the local file in the current
		// working directory.
		if ($remote == null)
		{
			$remote = basename($local);
		}

// Determine file type
		$mode = $this->_findMode($remote);

if (@ftp_put($this->conn, $remote, $local, $mode) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

return true;
		}

$this->_mode($mode);

// Check to see if the local file exists and if so open it for reading
		if (@ file_exists($local))
		{
			$fp = fopen($local, 'rb');

if (!$fp)
			{
				throw new FilesystemException(sprintf('%1$s: Unable to open local file for reading. Local path: %2$s', __METHOD__, $local));
			}
		}
		else
		{
			throw new FilesystemException(sprintf('%1$s: Unable to find local file. Local path: %2$s', __METHOD__, $local));
		}

// Start passive mode
		if (!$this->_passive())
		{
			@ fclose($fp);

throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
		}

// Send store command to the FTP server
		if (!$this->_putCmd('STOR ' . $remote, [150, 125]))
		{
			@ fclose($fp);
			@ fclose($this->dataconn);

throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 150 or 125].  Path sent: %3$s', __METHOD__, $this->response, $remote)
			);
		}

// Do actual file transfer, read local file and write to data port connection
		while (!feof($fp))
		{
			$line = fread($fp, 4096);

do
			{
				if (($result = @ fwrite($this->dataconn, $line)) === false)
				{
					throw new FilesystemException(__METHOD__ . ': Unable to write to data port socket');
				}

$line = substr($line, $result);
			}
			while ($line != '');
		}

fclose($fp);
		fclose($this->dataconn);

return true;
	}

/**
	 * Method to write a string to the FTP server
	 *
	 * @param   string  $remote  FTP path to file to write to
	 * @param   string  $buffer  Contents to write to the FTP server
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function write($remote, $buffer)
	{
		// Determine file type
		$mode = $this->_findMode($remote);

$tmp = fopen('buffer://tmp', 'br+');
			fwrite($tmp, $buffer);
			rewind($tmp);

if (@ftp_fput($this->conn, $remote, $tmp, $mode) === false)
			{
				fclose($tmp);

throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

fclose($tmp);

return true;
		}

// First we need to set the transfer mode
		$this->_mode($mode);

// Start passive mode
		if (!$this->_passive())
		{
			throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
		}

// Send store command to the FTP server
		if (!$this->_putCmd('STOR ' . $remote, [150, 125]))
		{
			@ fclose($this->dataconn);

throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 150 or 125].  Path sent: %3$s', __METHOD__, $this->response, $remote)
			);
		}

// Write buffer to the data connection port
		do
		{
			if (($result = @ fwrite($this->dataconn, $buffer)) === false)
			{
				throw new FilesystemException(__METHOD__ . ': Unable to write to data port socket.');
			}

$buffer = substr($buffer, $result);
		}
		while ($buffer != '');

// Close the data connection port [Data transfer complete]
		fclose($this->dataconn);

// Verify that the server recieved the transfer
		if (!$this->_verifyResponse(226))
		{
			throw new FilesystemException(
				sprintf('%1$s: Transfer failed.  Server response: %2$s [Expected: 226].  Path sent: %3$s', __METHOD__, $this->response, $remote)
			);
		}

return true;
	}

/**
	 * Method to list the filenames of the contents of a directory on the FTP server
	 *
	 * Note: Some servers also return folder names. However, to be sure to list folders on all
	 * servers, you should use listDetails() instead if you also need to deal with folders
	 *
	 * @param   string  $path  Path local file to store on the FTP server
	 *
	 * @return  string  Directory listing
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function listNames($path = null)
	{
		$data = null;

if (($list = @ftp_nlist($this->conn, $path)) === false)
			{
				// Workaround for empty directories on some servers
				if ($this->listDetails($path, 'files') === [])
				{
					return [];
				}

throw new FilesystemException(__METHOD__ . 'Bad response.');
			}

$list = preg_replace('#^' . preg_quote($path, '#') . '[/\\\\]?#', '', $list);

if ($keys = array_merge(array_keys($list, '.'), array_keys($list, '..')))
			{
				foreach ($keys as $key)
				{
					unset($list[$key]);
				}
			}

return $list;
		}

// If a path exists, prepend a space
		if ($path != null)
		{
			$path = ' ' . $path;
		}

// Start passive mode
		if (!$this->_passive())
		{
			throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
		}

if (!$this->_putCmd('NLST' . $path, [150, 125]))
		{
			@ fclose($this->dataconn);

// Workaround for empty directories on some servers
			if ($this->listDetails($path, 'files') === [])
			{
				return [];
			}

throw new FilesystemException(
				sprintf('%1$s: Bad response.  Server response: %2$s [Expected: 150 or 125].  Path sent: %3$s', __METHOD__, $this->response, $path)
			);
		}

// Read in the file listing.
		while (!feof($this->dataconn))
		{
			$data .= fread($this->dataconn, 4096);
		}

fclose($this->dataconn);

// Everything go okay?
		if (!$this->_verifyResponse(226))
		{
			throw new FilesystemException(
				sprintf('%1$s: Transfer failed.  Server response: %2$s [Expected: 226].  Path sent: %3$s', __METHOD__, $this->response, $path)
			);
		}

$data = preg_split('/[' . CRLF . ']+/', $data, -1, \PREG_SPLIT_NO_EMPTY);
		$data = preg_replace('#^' . preg_quote(substr($path, 1), '#') . '[/\\\\]?#', '', $data);

if ($keys = array_merge(array_keys($data, '.'), array_keys($data, '..')))
		{
			foreach ($keys as $key)
			{
				unset($data[$key]);
			}
		}

return $data;
	}

/**
	 * Method to list the contents of a directory on the FTP server
	 *
	 * @param   string  $path  Path to the local file to be stored on the FTP server
	 * @param   string  $type  Return type [raw|all|folders|files]
	 *
	 * @return  string[]  If $type is raw: string Directory listing, otherwise array of string with file-names
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	public function listDetails($path = null, $type = 'all')
	{
		$dirList = [];
		$data    = null;
		$regs    = null;

// TODO: Deal with recurse -- nightmare
		// For now we will just set it to false
		$recurse = false;

if (($contents = @ftp_rawlist($this->conn, $path)) === false)
			{
				throw new FilesystemException(__METHOD__ . 'Bad response.');
			}
		}
		else
		{
			// Non Native mode

// Start passive mode
			if (!$this->_passive())
			{
				throw new FilesystemException(__METHOD__ . ': Unable to use passive mode.');
			}

// If a path exists, prepend a space
			if ($path != null)
			{
				$path = ' ' . $path;
			}

// Request the file listing
			if (!$this->_putCmd(($recurse == true) ? 'LIST -R' : 'LIST' . $path, [150, 125]))
			{
				@ fclose($this->dataconn);

throw new FilesystemException(
					sprintf(
						'%1$s: Bad response.  Server response: %2$s [Expected: 150 or 125].  Path sent: %3$s',
						__METHOD__, $this->response, $path
					)
				);
			}

// Read in the file listing.
			while (!feof($this->dataconn))
			{
				$data .= fread($this->dataconn, 4096);
			}

fclose($this->dataconn);

// Everything go okay?
			if (!$this->_verifyResponse(226))
			{
				throw new FilesystemException(
					sprintf('%1$s: Transfer failed.  Server response: %2$s [Expected: 226].  Path sent: %3$s', __METHOD__, $this->response, $path)
				);
			}

$contents = explode(CRLF, $data);
		}

// If only raw output is requested we are done
		if ($type == 'raw')
		{
			return $data;
		}

// If we received the listing of an empty directory, we are done as well
		if (empty($contents[0]))
		{
			return $dirList;
		}

// If the server returned the number of results in the first response, let's dump it
		if (strtolower(substr($contents[0], 0, 6)) == 'total ')
		{
			array_shift($contents);

if (!isset($contents[0]) || empty($contents[0]))
			{
				return $dirList;
			}
		}

// Regular expressions for the directory listing parsing.
		$regexps = [
			'UNIX' => '#([-dl][rwxstST-]+).* ([0-9]*) ([a-zA-Z0-9]+).* ([a-zA-Z0-9]+).* ([0-9]*)'
				. ' ([a-zA-Z]+[0-9: ]*[0-9])[ ]+(([0-9]{1,2}:[0-9]{2})|[0-9]{4}) (.+)#',
			'MAC' => '#([-dl][rwxstST-]+).* ?([0-9 ]*)?([a-zA-Z0-9]+).* ([a-zA-Z0-9]+).* ([0-9]*)'
				. ' ([a-zA-Z]+[0-9: ]*[0-9])[ ]+(([0-9]{2}:[0-9]{2})|[0-9]{4}) (.+)#',
			'WIN' => '#([0-9]{2})-([0-9]{2})-([0-9]{2}) +([0-9]{2}):([0-9]{2})(AM|PM) +([0-9]+|<DIR>) +(.+)#',
		];

// Find out the format of the directory listing by matching one of the regexps
		$osType = null;

foreach ($regexps as $k => $v)
		{
			if (@preg_match($v, $contents[0]))
			{
				$osType = $k;
				$regexp = $v;

break;
			}
		}

if (!$osType)
		{
			throw new FilesystemException(__METHOD__ . ': Unrecognised directory listing format.');
		}

/*
		 * Here is where it is going to get dirty....
		 */
		if ($osType == 'UNIX' || $osType == 'MAC')
		{
			foreach ($contents as $file)
			{
				$tmpArray = null;

if (@preg_match($regexp, $file, $regs))
				{
					$fType = (int) strpos('-dl', $regs[1][0]);

// $tmpArray['line'] = $regs[0];
					$tmpArray['type']   = $fType;
					$tmpArray['rights'] = $regs[1];

// $tmpArray['number'] = $regs[2];
					$tmpArray['user']  = $regs[3];
					$tmpArray['group'] = $regs[4];
					$tmpArray['size']  = $regs[5];
					$tmpArray['date']  = @date('m-d', strtotime($regs[6]));
					$tmpArray['time']  = $regs[7];
					$tmpArray['name']  = $regs[9];
				}

// If we just want files, do not add a folder
				if ($type == 'files' && $tmpArray['type'] == 1)
				{
					continue;
				}

// If we just want folders, do not add a file
				if ($type == 'folders' && $tmpArray['type'] == 0)
				{
					continue;
				}

if (\is_array($tmpArray) && $tmpArray['name'] != '.' && $tmpArray['name'] != '..')
				{
					$dirList[] = $tmpArray;
				}
			}
		}
		else
		{
			foreach ($contents as $file)
			{
				$tmpArray = null;

if (@preg_match($regexp, $file, $regs))
				{
					$fType     = (int) ($regs[7] == '<DIR>');
					$timestamp = strtotime("$regs[3]-$regs[1]-$regs[2] $regs[4]:$regs[5]$regs[6]");

// $tmpArray['line'] = $regs[0];
					$tmpArray['type']   = $fType;
					$tmpArray['rights'] = '';

// $tmpArray['number'] = 0;
					$tmpArray['user']  = '';
					$tmpArray['group'] = '';
					$tmpArray['size']  = (int) $regs[7];
					$tmpArray['date']  = date('m-d', $timestamp);
					$tmpArray['time']  = date('H:i', $timestamp);
					$tmpArray['name']  = $regs[8];
				}

// If we just want files, do not add a folder
				if ($type == 'files' && $tmpArray['type'] == 1)
				{
					continue;
				}

// If we just want folders, do not add a file
				if ($type == 'folders' && $tmpArray['type'] == 0)
				{
					continue;
				}

if (\is_array($tmpArray) && $tmpArray['name'] != '.' && $tmpArray['name'] != '..')
				{
					$dirList[] = $tmpArray;
				}
			}
		}

return $dirList;
	}

/**
	 * Send command to the FTP server and validate an expected response code
	 *
	 * @param   string  $cmd               Command to send to the FTP server
	 * @param   mixed   $expectedResponse  Integer response code or array of integer response codes
	 *
	 * @return  boolean  True if command executed successfully
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	protected function _putCmd($cmd, $expectedResponse)
	{
		// Make sure we have a connection to the server
		if (!\is_resource($this->conn))
		{
			throw new FilesystemException(__METHOD__ . ': Not connected to the control port.');
		}

// Send the command to the server
		if (!fwrite($this->conn, $cmd . "\r\n"))
		{
			throw new FilesystemException(sprintf('%1$s: Unable to send command: %2$s', __METHOD__, $cmd));
		}

return $this->_verifyResponse($expectedResponse);
	}

/**
	 * Verify the response code from the server and log response if flag is set
	 *
	 * @param   mixed  $expected  Integer response code or array of integer response codes
	 *
	 * @return  boolean  True if response code from the server is expected
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	protected function _verifyResponse($expected)
	{
		$parts = null;

// Wait for a response from the server, but timeout after the set time limit
		$endTime        = time() + $this->timeout;
		$this->response = '';

do
		{
			$this->response .= fgets($this->conn, 4096);
		}
		while (!preg_match('/^([0-9]{3})(-(.*' . CRLF . ')+\\1)? [^' . CRLF . ']+' . CRLF . '$/', $this->response, $parts) && time() < $endTime);

// Catch a timeout or bad response
		if (!isset($parts[1]))
		{
			throw new FilesystemException(
				sprintf(
					'%1$s: Timeout or unrecognised response while waiting for a response from the server. Server response: %2$s',
					__METHOD__, $this->response
				)
			);
		}

// Separate the code from the message
		$this->responseCode = $parts[1];
		$this->responseMsg  = $parts[0];

// Did the server respond with the code we wanted?
		if (\is_array($expected))
		{
			if (\in_array($this->responseCode, $expected))
			{
				$retval = true;
			}
			else
			{
				$retval = false;
			}
		}
		else
		{
			if ($this->responseCode == $expected)
			{
				$retval = true;
			}
			else
			{
				$retval = false;
			}
		}

return $retval;
	}

/**
	 * Set server to passive mode and open a data port connection
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	protected function _passive()
	{
		$match = [];
		$parts = [];
		$errno = null;
		$err   = null;

// Make sure we have a connection to the server
		if (!\is_resource($this->conn))
		{
			throw new FilesystemException(__METHOD__ . ': Not connected to the control port.');
		}

// Request a passive connection - this means, we'll talk to you, you don't talk to us.
		@ fwrite($this->conn, "PASV\r\n");

// Wait for a response from the server, but timeout after the set time limit
		$endTime        = time() + $this->timeout;
		$this->response = '';

do
		{
			$this->response .= fgets($this->conn, 4096);
		}
		while (!preg_match('/^([0-9]{3})(-(.*' . CRLF . ')+\\1)? [^' . CRLF . ']+' . CRLF . '$/', $this->response, $parts) && time() < $endTime);

// Separate the code from the message
		$this->responseCode = $parts[1];
		$this->responseMsg  = $parts[0];

// If it's not 227, we weren't given an IP and port, which means it failed.
		if ($this->responseCode != 227)
		{
			throw new FilesystemException(
				sprintf('%1$s: Unable to obtain IP and port for data transfer. Server response: %2$s', __METHOD__, $this->responseMsg)
			);
		}

// Snatch the IP and port information, or die horribly trying...
		if (preg_match('~$(\d+),\s*(\d+),\s*(\d+),\s*(\d+),\s*(\d+)(?:,\s*(\d+))$~', $this->responseMsg, $match) == 0)
		{
			throw new FilesystemException(
				sprintf('%1$s: IP and port for data transfer not valid. Server response: %2$s', __METHOD__, $this->responseMsg)
			);
		}

// This is pretty simple - store it for later use ;).
		$this->pasv = ['ip' => $match[1] . '.' . $match[2] . '.' . $match[3] . '.' . $match[4], 'port' => $match[5] * 256 + $match[6]];

// Connect, assuming we've got a connection.
		$this->dataconn = @fsockopen($this->pasv['ip'], $this->pasv['port'], $errno, $err, $this->timeout);

if (!$this->dataconn)
		{
			throw new FilesystemException(
				sprintf(
					'%1$s: Could not connect to host %2$s on port %3$s. Socket error number: %4$s and error message: %5$s',
					__METHOD__,
					$this->pasv['ip'],
					$this->pasv['port'],
					$errno,
					$err
				)
			);
		}

// Set the timeout for this connection
		socket_set_timeout($this->conn, $this->timeout, 0);

return true;
	}

/**
	 * Method to find out the correct transfer mode for a specific file
	 *
	 * @param   string  $fileName  Name of the file
	 *
	 * @return  integer Transfer-mode for this filetype [FTP_ASCII|FTP_BINARY]
	 *
	 * @since   1.0
	 */
	protected function _findMode($fileName)
	{
		if ($this->type == FTP_AUTOASCII)
		{
			$dot = strrpos($fileName, '.') + 1;
			$ext = substr($fileName, $dot);

if (\in_array($ext, $this->autoAscii))
			{
				$mode = \FTP_ASCII;
			}
			else
			{
				$mode = \FTP_BINARY;
			}
		}
		elseif ($this->type == \FTP_ASCII)
		{
			$mode = \FTP_ASCII;
		}
		else
		{
			$mode = \FTP_BINARY;
		}

return $mode;
	}

/**
	 * Set transfer mode
	 *
	 * @param   integer  $mode  Integer representation of data transfer mode [1:Binary|0:Ascii]
	 *                          Defined constants can also be used [FTP_BINARY|FTP_ASCII]
	 *
	 * @return  boolean  True if successful
	 *
	 * @since   1.0
	 * @throws  FilesystemException
	 */
	protected function _mode($mode)
	{
		if ($mode == \FTP_BINARY)
		{
			if (!$this->_putCmd('TYPE I', 200))
			{
				throw new FilesystemException(
					sprintf('%1$s: Bad response. Server response: %2$s [Expected: 200]. Mode sent: Binary', __METHOD__, $this->response)
				);
			}
		}
		else
		{
			if (!$this->_putCmd('TYPE A', 200))
			{
				throw new FilesystemException(
					sprintf('%1$s: Bad response. Server response: %2$s [Expected: 200]. Mode sent: ASCII', __METHOD__, $this->response)
				);
			}
		}

return true;
	}
}

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