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<?php

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/**

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* PemFTP - An Ftp implementation in pure PHP

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* @package PemFTP

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* @since 2.5.0

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* @version 1.0

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* @copyright Alexey Dotsenko

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* @author Alexey Dotsenko

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* @link https://www.phpclasses.org/package/1743-PHP-FTP-client-in-pure-PHP.html

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* @license LGPL https://opensource.org/licenses/lgpl-license.html

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/**

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* FTP implementation using fsockopen to connect.

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* @package PemFTP

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* @subpackage Pure

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* @since 2.5.0

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* @version 1.0

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* @copyright Alexey Dotsenko

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* @author Alexey Dotsenko

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* @link https://www.phpclasses.org/package/1743-PHP-FTP-client-in-pure-PHP.html

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* @license LGPL https://opensource.org/licenses/lgpl-license.html

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class ftp_pure extends ftp_base {

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function __construct($verb=FALSE, $le=FALSE) {

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parent::__construct(false, $verb, $le);

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}

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//

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//

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//

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function _settimeout($sock) {

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if(!@stream_set_timeout($sock, $this->_timeout)) {

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$this->PushError('_settimeout','socket set send timeout');

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$this->_quit();

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return FALSE;

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}

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return TRUE;

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}

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function _connect($host, $port) {

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$this->SendMSG("Creating socket");

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$sock = @fsockopen($host, $port, $errno, $errstr, $this->_timeout);

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if (!$sock) {

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$this->PushError('_connect','socket connect failed', $errstr." (".$errno.")");

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return FALSE;

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}

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$this->_connected=true;

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return $sock;

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}

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function _readmsg($fnction="_readmsg"){

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if(!$this->_connected) {

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$this->PushError($fnction, 'Connect first');

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return FALSE;

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}

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$result=true;

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$this->_message="";

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$this->_code=0;

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$go=true;

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do {

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$tmp=@fgets($this->_ftp_control_sock, 512);

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if($tmp===false) {

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$go=$result=false;

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$this->PushError($fnction,'Read failed');

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} else {

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$this->_message.=$tmp;

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if(preg_match("/^([0-9]{3})(-(.*[".CRLF."]{1,2})+\\1)? [^".CRLF."]+[".CRLF."]{1,2}$/", $this->_message, $regs)) $go=false;

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}

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} while($go);

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if($this->LocalEcho) echo "GET < ".rtrim($this->_message, CRLF).CRLF;

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$this->_code=(int)$regs[1];

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return $result;

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}

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function _exec($cmd, $fnction="_exec") {

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if(!$this->_ready) {

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$this->PushError($fnction,'Connect first');

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return FALSE;

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}

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if($this->LocalEcho) echo "PUT > ",$cmd,CRLF;

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$status=@fputs($this->_ftp_control_sock, $cmd.CRLF);

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if($status===false) {

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$this->PushError($fnction,'socket write failed');

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return FALSE;

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}

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$this->_lastaction=time();

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if(!$this->_readmsg($fnction)) return FALSE;

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return TRUE;

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}

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function _data_prepare($mode=FTP_ASCII) {

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if(!$this->_settype($mode)) return FALSE;

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if($this->_passive) {

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if(!$this->_exec("PASV", "pasv")) {

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$this->_data_close();

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return FALSE;

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}

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if(!$this->_checkCode()) {

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$this->_data_close();

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return FALSE;

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}

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$ip_port = explode(",", preg_replace("/^.+ \$?([0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]+,[0-9]+)\$?.*$/s", "\\1", $this->_message));

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$this->_datahost=$ip_port[0].".".$ip_port[1].".".$ip_port[2].".".$ip_port[3];

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$this->_dataport=(((int)$ip_port[4])<<8) + ((int)$ip_port[5]);

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$this->SendMSG("Connecting to ".$this->_datahost.":".$this->_dataport);

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$this->_ftp_data_sock=@fsockopen($this->_datahost, $this->_dataport, $errno, $errstr, $this->_timeout);

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if(!$this->_ftp_data_sock) {

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$this->PushError("_data_prepare","fsockopen fails", $errstr." (".$errno.")");

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$this->_data_close();

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return FALSE;

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}

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else $this->_ftp_data_sock;

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} else {

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$this->SendMSG("Only passive connections available!");

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return FALSE;

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}

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return TRUE;

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}

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function _data_read($mode=FTP_ASCII, $fp=NULL) {

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if(is_resource($fp)) $out=0;

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else $out="";

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if(!$this->_passive) {

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$this->SendMSG("Only passive connections available!");

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return FALSE;

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}

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while (!feof($this->_ftp_data_sock)) {

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$block=fread($this->_ftp_data_sock, $this->_ftp_buff_size);

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if($mode!=FTP_BINARY) $block=preg_replace("/\r\n|\r|\n/", $this->_eol_code[$this->OS_local], $block);

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if(is_resource($fp)) $out+=fwrite($fp, $block, strlen($block));

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else $out.=$block;

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}

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return $out;

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}

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function _data_write($mode=FTP_ASCII, $fp=NULL) {

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if(is_resource($fp)) $out=0;

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else $out="";

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if(!$this->_passive) {

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$this->SendMSG("Only passive connections available!");

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return FALSE;

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}

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if(is_resource($fp)) {

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while(!feof($fp)) {

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$block=fread($fp, $this->_ftp_buff_size);

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if(!$this->_data_write_block($mode, $block)) return false;

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}

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} elseif(!$this->_data_write_block($mode, $fp)) return false;

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return TRUE;

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}

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function _data_write_block($mode, $block) {

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if($mode!=FTP_BINARY) $block=preg_replace("/\r\n|\r|\n/", $this->_eol_code[$this->OS_remote], $block);

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do {

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if(($t=@fwrite($this->_ftp_data_sock, $block))===FALSE) {

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$this->PushError("_data_write","Can't write to socket");

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return FALSE;

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}

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$block=substr($block, $t);

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} while(!empty($block));

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return true;

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}

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function _data_close() {

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@fclose($this->_ftp_data_sock);

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$this->SendMSG("Disconnected data from remote host");

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return TRUE;

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}

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function _quit($force=FALSE) {

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if($this->_connected or $force) {

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@fclose($this->_ftp_control_sock);

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$this->_connected=false;

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$this->SendMSG("Socket closed");

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}

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}

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}

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