/**
* This method is called immediately after the wrapper is initialized
*
* Connects to an SFTP server
*
* NOTE: This method is not get called by default for the following functions:
* dir_opendir(), mkdir(), rename(), rmdir(), stream_metadata(), unlink() and url_stat()
* So I implemented a call to stream_open() at the beginning of the functions and stream_close() at the end
*
* The wrapper will also reuse open connections
*
* @param String $path
* @param String $mode
* @param Integer $options
* @param String &$opened_path
* @return bool
* @access public
*/
public function stream_open($path, $mode, $options, &$opened_path)
{
$url = parse_url($path);
$host = $url["host"];
$port = $url["port"];
$user = $url["user"];
$pass = $url["pass"];
$this->path = $url["path"];
$connection_uuid = md5($host . $port . $user);
// Generate a unique ID for the current connection
if (isset(self::$instances[$connection_uuid])) {
// Get previously established connection
$this->sftp = self::$instances[$connection_uuid];
} else {
//$context = stream_context_get_options($this->context);
if (!isset($user) || !isset($pass)) {
return FALSE;
}
// Connection
$sftp = new Net_SFTP($host, isset($port) ? $port : 22);
if (!$sftp->login($user, $pass)) {
return FALSE;
}
// Store connection instance
self::$instances[$connection_uuid] = $sftp;
// Get current connection
$this->sftp = $sftp;
}
$filesize = $this->sftp->size($this->path);
if (isset($mode)) {
$this->mode = preg_replace('#[bt]$#', '', $mode);
} else {
$this->mode = 'r';
}
switch ($this->mode[0]) {
case 'r':
$this->position = 0;
break;
case 'w':
$this->position = 0;
if ($filesize === FALSE) {
$this->sftp->touch($this->path);
} else {
$this->sftp->truncate($this->path, 0);
}
break;
case 'a':
if ($filesize === FALSE) {
$this->position = 0;
$this->sftp->touch($this->path);
} else {
$this->position = $filesize;
}
break;
case 'c':
$this->position = 0;
if ($filesize === FALSE) {
$this->sftp->touch($this->path);
}
break;
default:
return FALSE;
}
if ($options == STREAM_USE_PATH) {
$opened_path = $this->sftp->pwd();
}
return TRUE;
}
