<?php

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

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/**

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

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*/

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class UpdraftPlus_ftp_wrapper {

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private $conn_id;

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private $host;

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private $username;

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private $password;

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private $port;

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public $timeout = 60;

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public $passive = true;

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public $system_type = '';

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public $ssl = false;

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public $use_server_certs = false;

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public $disable_verify = true;

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public $login_type = 'non-encrypted';

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public function __construct($host, $username, $password, $port = 21) {

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$this->host = $host;

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$this->username = $username;

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$this->password = $password;

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$this->port = $port;

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}

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public function connect() {

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$time_start = time();

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

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if ($this->conn_id) $result = ftp_login($this->conn_id, $this->username, $this->password);

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if (!empty($result)) {

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ftp_set_option($this->conn_id, FTP_TIMEOUT_SEC, $this->timeout);

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ftp_pasv($this->conn_id, $this->passive);

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$this->system_type = ftp_systype($this->conn_id);

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return true;

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}

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if (time() - $time_start > 19) {

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global $updraftplus_admin;

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if (isset($updraftplus_admin->logged) && is_array($updraftplus_admin->logged)) {

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$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');

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} else {

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global $updraftplus;

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$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');

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}

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}

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return false;

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}

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

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$file_size = filesize($local_file_path);

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$existing_size = 0;

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if ($resume) {

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$existing_size = ftp_size($this->conn_id, $remote_file_path);

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if ($existing_size <=0) {

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$resume = false;

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$existing_size = 0;

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} else {

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if (is_a($updraftplus, 'UpdraftPlus')) $updraftplus->log("File already exists at remote site: size $existing_size. Will attempt resumption.");

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if ($existing_size >= $file_size) {

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if (is_a($updraftplus, 'UpdraftPlus')) $updraftplus->log("File is apparently already completely uploaded");

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return true;

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}

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}

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}

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// From here on, $file_size is only used for logging calculations. We want to avoid divsion by zero.

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$file_size = max($file_size, 1);

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

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if ($existing_size) fseek($fh, $existing_size);

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

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// $existing_size can now be re-purposed

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while (FTP_MOREDATA == $ret) {

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if (is_a($updraftplus, 'UpdraftPlus')) {

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$new_size = ftell($fh);

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$record_after = 524288;

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if ($existing_size > 2097152) {

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$record_after = ($existing_size > 4194304) ? 2097152 : 1048576;

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}

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if ($new_size - $existing_size > $record_after) {

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$existing_size = $new_size;

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$percent = round(100*$new_size/$file_size, 1);

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$updraftplus->record_uploaded_chunk($percent, '', $local_file_path);

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}

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}

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// Continue upload

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

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}

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fclose($fh);

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if (FTP_FINISHED != $ret) {

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if (is_a($updraftplus, 'UpdraftPlus')) $updraftplus->log("FTP upload: error ($ret)");

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return false;

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}

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return true;

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}

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

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$file_last_size = 0;

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if ($resume) {

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if (!$fh = fopen($local_file_path, 'ab')) return false;

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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

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$file_last_size = filesize($local_file_path);

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} else {

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if (!$fh = fopen($local_file_path, 'wb')) return false;

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}

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

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if (false == $ret) return false;

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while (FTP_MOREDATA == $ret) {

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if ($updraftplus) {

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$file_now_size = filesize($local_file_path);

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if ($file_now_size - $file_last_size > 524288) {

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$updraftplus->log("FTP fetch: file size is now: ".sprintf("%0.2f", filesize($local_file_path)/1048576)." Mb");

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$file_last_size = $file_now_size;

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}

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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

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}

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

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}

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fclose($fh);

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if (FTP_FINISHED == $ret) {

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if ($updraftplus) $updraftplus->log("FTP fetch: fetch complete");

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return true;

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} else {

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if ($updraftplus) $updraftplus->log("FTP fetch: fetch failed");

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return false;

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}

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}

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public function chmod($permissions, $remote_filename) {

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if ($this->is_octal($permissions)) {

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$result = ftp_chmod($this->conn_id, $permissions, $remote_filename);

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if ($result) {

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return true;

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} else {

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return false;

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}

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} else {

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throw new Exception('$permissions must be an octal number');

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}

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}

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public function chdir($directory) {

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ftp_chdir($this->conn_id, $directory);

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}

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public function delete($remote_file_path) {

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if (ftp_delete($this->conn_id, $remote_file_path)) {

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return true;

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} else {

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return false;

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}

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}

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public function make_dir($directory) {

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if (ftp_mkdir($this->conn_id, $directory)) {

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return true;

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} else {

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return false;

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}

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}

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public function rename($old_name, $new_name) {

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if (ftp_rename($this->conn_id, $old_name, $new_name)) {

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return true;

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} else {

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return false;

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}

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}

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public function remove_dir($directory) {

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if (ftp_rmdir($this->conn_id, $directory)) {

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return true;

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} else {

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return false;

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}

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}

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public function dir_list($directory) {

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return ftp_nlist($this->conn_id, $directory);

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}

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public function cdup() {

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ftp_cdup($this->conn_id);

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}

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public function size($f) {

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return ftp_size($this->conn_id, $f);

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}

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public function current_dir() {

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return ftp_pwd($this->conn_id);

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}

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private function is_octal($i) {

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return decoct(octdec($i)) == $i;

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}

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public function __destruct() {

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if ($this->conn_id) ftp_close($this->conn_id);

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}

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}

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