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Editing: ftp.class.php

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<?php
// phpcs:disable WordPress.WP.AlternativeFunctions.file_system_operations_fopen -- Using the default PHP fopen() function instead of the WP Filesystem API.
// phpcs:disable WordPress.WP.AlternativeFunctions.file_system_operations_fclose -- using the native PHP fclose() function instead of the WP Filesystem API.

if (!defined('ABSPATH')) die('No direct access allowed.');

/**
 * Adapted from http://www.solutionbot.com/2009/01/02/php-ftp-class/
 */
class UpdraftPlus_ftp_wrapper {

private $conn_id;

private $host;

private $username;

private $password;

private $port;

public $timeout = 60;

public $passive = true;

public $system_type = '';

public $ssl = false;

public $use_server_certs = false;

public $disable_verify = true;

public $login_type = 'non-encrypted';
 
	public function __construct($host, $username, $password, $port = 21) {
		$this->host     = $host;
		$this->username = $username;
		$this->password = $password;
		$this->port     = $port;
	}
 
	public function connect() {

$time_start = time();
		$this->conn_id = ftp_connect($this->host, $this->port, 20);

if ($this->conn_id) $result = ftp_login($this->conn_id, $this->username, $this->password);
 
		if (!empty($result)) {
			ftp_set_option($this->conn_id, FTP_TIMEOUT_SEC, $this->timeout);
			 ftp_pasv($this->conn_id, $this->passive);
			$this->system_type = ftp_systype($this->conn_id);
			return true;
		}

if (time() - $time_start > 19) {
			global $updraftplus_admin;
			if (isset($updraftplus_admin->logged) && is_array($updraftplus_admin->logged)) {
				/* translators: %s: Connection type (e.g., FTP) */
				$updraftplus_admin->logged[] = sprintf(__('The %s connection timed out; if you entered the server correctly, then this is usually caused by a firewall blocking the connection - you should check with your web hosting company.', 'updraftplus'), 'FTP');
			} else {
				global $updraftplus;
				/* translators: %s: Connection type (e.g., FTP) */
				$updraftplus->log(sprintf(__('The %s connection timed out; if you entered the server correctly, then this is usually caused by a firewall blocking the connection - you should check with your web hosting company.', 'updraftplus'), 'FTP'), 'error');
			}
		}

return false;
	}
 
	public function put($local_file_path, $remote_file_path, $mode = FTP_BINARY, $resume = false, $updraftplus = false) {

$file_size = filesize($local_file_path);

$existing_size = 0;
		if ($resume) {
			$existing_size = ftp_size($this->conn_id, $remote_file_path);
			if ($existing_size <=0) {
				$resume = false;
				$existing_size = 0;
			} else {
				if (is_a($updraftplus, 'UpdraftPlus')) $updraftplus->log("File already exists at remote site: size $existing_size. Will attempt resumption.");
				if ($existing_size >= $file_size) {
					if (is_a($updraftplus, 'UpdraftPlus')) $updraftplus->log("File is apparently already completely uploaded");
					return true;
				}
			}
		}

// From here on, $file_size is only used for logging calculations. We want to avoid division by zero.
		$file_size = max($file_size, 1);

if (!$fh = fopen($local_file_path, 'rb')) return false;
		if ($existing_size) fseek($fh, $existing_size);

$ret = ftp_nb_fput($this->conn_id, $remote_file_path, $fh, $mode, $existing_size);

// $existing_size can now be re-purposed

while (FTP_MOREDATA == $ret) {
			if (is_a($updraftplus, 'UpdraftPlus')) {
				$new_size = ftell($fh);
				$record_after = 524288;
				if ($existing_size > 2097152) {
					$record_after = ($existing_size > 4194304) ? 2097152 : 1048576;
				}
				if ($new_size - $existing_size > $record_after) {
					$existing_size = $new_size;
					$percent = round(100*$new_size/$file_size, 1);
					$updraftplus->record_uploaded_chunk($percent, '', $local_file_path);
				}
			}
			// Continue upload
			$ret = ftp_nb_continue($this->conn_id);
		}

fclose($fh);

if (FTP_FINISHED != $ret) {
			if (is_a($updraftplus, 'UpdraftPlus')) $updraftplus->log("FTP upload: error ($ret)");
			return false;
		}

return true;

}
 
	public function get($local_file_path, $remote_file_path, $mode = FTP_BINARY, $resume = false, $updraftplus = false) {

$file_last_size = 0;

if ($resume) {
			if (!$fh = fopen($local_file_path, 'ab')) return false;
			clearstatcache($local_file_path);// phpcs:ignore PHPCompatibility.FunctionUse.NewFunctionParameters.clearstatcache_clear_realpath_cacheFound -- The function clearstatcache() does not have a parameter "clear_realpath_cache" in PHP version 5.2 or earlier
			$file_last_size = filesize($local_file_path);
		} else {
			if (!$fh = fopen($local_file_path, 'wb')) return false;
		}

$ret = ftp_nb_fget($this->conn_id, $fh, $remote_file_path, $mode, $file_last_size);

if (false == $ret) return false;

while (FTP_MOREDATA == $ret) {

if ($updraftplus) {
				$file_now_size = filesize($local_file_path);
				if ($file_now_size - $file_last_size > 524288) {
					$updraftplus->log("FTP fetch: file size is now: ".sprintf("%0.2f", filesize($local_file_path)/1048576)." Mb");
					$file_last_size = $file_now_size;
				}
				clearstatcache($local_file_path);// phpcs:ignore PHPCompatibility.FunctionUse.NewFunctionParameters.clearstatcache_clear_realpath_cacheFound -- The function clearstatcache() does not have a parameter "clear_realpath_cache" in PHP version 5.2 or earlier
			}

$ret = ftp_nb_continue($this->conn_id);
		}

fclose($fh);

if (FTP_FINISHED == $ret) {
			if ($updraftplus) $updraftplus->log("FTP fetch: fetch complete");
			return true;
		} else {
			if ($updraftplus) $updraftplus->log("FTP fetch: fetch failed");
			return false;
		}

}

public function chmod($permissions, $remote_filename) {
		if ($this->is_octal($permissions)) {
			$result = ftp_chmod($this->conn_id, $permissions, $remote_filename);
			if ($result) {
				return true;
			} else {
				return false;
			}
		} else {
			throw new Exception('$permissions must be an octal number');
		}
	}
 
	public function chdir($directory) {
		ftp_chdir($this->conn_id, $directory);
	}
 
	public function delete($remote_file_path) {
		if (ftp_delete($this->conn_id, $remote_file_path)) {
			return true;
		} else {
			return false;
		}
	}
 
	public function make_dir($directory) {
		if (ftp_mkdir($this->conn_id, $directory)) {
			return true;
		} else {
			return false;
		}
	}
 
	public function rename($old_name, $new_name) {
		if (ftp_rename($this->conn_id, $old_name, $new_name)) {
			return true;
		} else {
			return false;
		}
	}
 
	public function remove_dir($directory) {
		if (ftp_rmdir($this->conn_id, $directory)) {
			return true;
		} else {
			return false;
		}
	}
 
	public function dir_list($directory) {
		return ftp_nlist($this->conn_id, $directory);
	}
 
	public function cdup() {
		ftp_cdup($this->conn_id);
	}
 
	public function size($f) {
		return ftp_size($this->conn_id, $f);
	}

public function current_dir() {
		return ftp_pwd($this->conn_id);
	}
 
	private function is_octal($i) {
		return decoct(octdec($i)) == $i;
	}
 
	public function __destruct() {
		if ($this->conn_id) ftp_close($this->conn_id);
	}
}

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