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/**
 * PemFTP - An Ftp implementation in pure PHP
 *
 * @package PemFTP
 * @since 2.5.0
 *
 * @version 1.0
 * @copyright Alexey Dotsenko
 * @author Alexey Dotsenko
 * @link https://www.phpclasses.org/package/1743-PHP-FTP-client-in-pure-PHP.html
 * @license LGPL https://opensource.org/licenses/lgpl-license.html
 */

/**
 * FTP implementation using fsockopen to connect.
 *
 * @package PemFTP
 * @subpackage Pure
 * @since 2.5.0
 *
 * @version 1.0
 * @copyright Alexey Dotsenko
 * @author Alexey Dotsenko
 * @link https://www.phpclasses.org/package/1743-PHP-FTP-client-in-pure-PHP.html
 * @license LGPL https://opensource.org/licenses/lgpl-license.html
 */
class ftp_pure extends ftp_base {

	function __construct($verb=FALSE, $le=FALSE) {
		parent::__construct(false, $verb, $le);
	}

// &lt;!-- --------------------------------------------------------------------------------------- --&gt;
// &lt;!--       Private functions                                                                 --&gt;
// &lt;!-- --------------------------------------------------------------------------------------- --&gt;

	function _settimeout($sock) {
		if(!@stream_set_timeout($sock, $this-&gt;_timeout)) {
			$this-&gt;PushError('_settimeout','socket set send timeout');
			$this-&gt;_quit();
			return FALSE;
		}
		return TRUE;
	}

	function _connect($host, $port) {
		$this-&gt;SendMSG(&quot;Creating socket&quot;);
		$sock = @fsockopen($host, $port, $errno, $errstr, $this-&gt;_timeout);
		if (!$sock) {
			$this-&gt;PushError('_connect','socket connect failed', $errstr.&quot; (&quot;.$errno.&quot;)&quot;);
			return FALSE;
		}
		$this-&gt;_connected=true;
		return $sock;
	}

	function _readmsg($fnction=&quot;_readmsg&quot;){
		if(!$this-&gt;_connected) {
			$this-&gt;PushError($fnction, 'Connect first');
			return FALSE;
		}
		$result=true;
		$this-&gt;_message=&quot;&quot;;
		$this-&gt;_code=0;
		$go=true;
		do {
			$tmp=@fgets($this-&gt;_ftp_control_sock, 512);
			if($tmp===false) {
				$go=$result=false;
				$this-&gt;PushError($fnction,'Read failed');
			} else {
				$this-&gt;_message.=$tmp;
				if(preg_match(&quot;/^([0-9]{3})(-(.*[&quot;.CRLF.&quot;]{1,2})+\\1)? [^&quot;.CRLF.&quot;]+[&quot;.CRLF.&quot;]{1,2}$/&quot;, $this-&gt;_message, $regs)) $go=false;
			}
		} while($go);
		if($this-&gt;LocalEcho) echo &quot;GET &lt; &quot;.rtrim($this-&gt;_message, CRLF).CRLF;
		$this-&gt;_code=(int)$regs[1];
		return $result;
	}

	function _exec($cmd, $fnction=&quot;_exec&quot;) {
		if(!$this-&gt;_ready) {
			$this-&gt;PushError($fnction,'Connect first');
			return FALSE;
		}
		if($this-&gt;LocalEcho) echo &quot;PUT &gt; &quot;,$cmd,CRLF;
		$status=@fputs($this-&gt;_ftp_control_sock, $cmd.CRLF);
		if($status===false) {
			$this-&gt;PushError($fnction,'socket write failed');
			return FALSE;
		}
		$this-&gt;_lastaction=time();
		if(!$this-&gt;_readmsg($fnction)) return FALSE;
		return TRUE;
	}

	function _data_prepare($mode=FTP_ASCII) {
		if(!$this-&gt;_settype($mode)) return FALSE;
		if($this-&gt;_passive) {
			if(!$this-&gt;_exec(&quot;PASV&quot;, &quot;pasv&quot;)) {
				$this-&gt;_data_close();
				return FALSE;
			}
			if(!$this-&gt;_checkCode()) {
				$this-&gt;_data_close();
				return FALSE;
			}
			$ip_port = explode(&quot;,&quot;, preg_replace(&quot;/^.+ \\(?([0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]+,[0-9]+)\\)?.*$/s&quot;, &quot;\\1&quot;, $this-&gt;_message));
			$this-&gt;_datahost=$ip_port[0].&quot;.&quot;.$ip_port[1].&quot;.&quot;.$ip_port[2].&quot;.&quot;.$ip_port[3];
            $this-&gt;_dataport=(((int)$ip_port[4])&lt;&lt;8) + ((int)$ip_port[5]);
			$this-&gt;SendMSG(&quot;Connecting to &quot;.$this-&gt;_datahost.&quot;:&quot;.$this-&gt;_dataport);
			$this-&gt;_ftp_data_sock=@fsockopen($this-&gt;_datahost, $this-&gt;_dataport, $errno, $errstr, $this-&gt;_timeout);
			if(!$this-&gt;_ftp_data_sock) {
				$this-&gt;PushError(&quot;_data_prepare&quot;,&quot;fsockopen fails&quot;, $errstr.&quot; (&quot;.$errno.&quot;)&quot;);
				$this-&gt;_data_close();
				return FALSE;
			}
			else $this-&gt;_ftp_data_sock;
		} else {
			$this-&gt;SendMSG(&quot;Only passive connections available!&quot;);
			return FALSE;
		}
		return TRUE;
	}

	function _data_read($mode=FTP_ASCII, $fp=NULL) {
		if(is_resource($fp)) $out=0;
		else $out=&quot;&quot;;
		if(!$this-&gt;_passive) {
			$this-&gt;SendMSG(&quot;Only passive connections available!&quot;);
			return FALSE;
		}
		while (!feof($this-&gt;_ftp_data_sock)) {
			$block=fread($this-&gt;_ftp_data_sock, $this-&gt;_ftp_buff_size);
			if($mode!=FTP_BINARY) $block=preg_replace(&quot;/\r\n|\r|\n/&quot;, $this-&gt;_eol_code[$this-&gt;OS_local], $block);
			if(is_resource($fp)) $out+=fwrite($fp, $block, strlen($block));
			else $out.=$block;
		}
		return $out;
	}

	function _data_write($mode=FTP_ASCII, $fp=NULL) {
		if(is_resource($fp)) $out=0;
		else $out=&quot;&quot;;
		if(!$this-&gt;_passive) {
			$this-&gt;SendMSG(&quot;Only passive connections available!&quot;);
			return FALSE;
		}
		if(is_resource($fp)) {
			while(!feof($fp)) {
				$block=fread($fp, $this-&gt;_ftp_buff_size);
				if(!$this-&gt;_data_write_block($mode, $block)) return false;
			}
		} elseif(!$this-&gt;_data_write_block($mode, $fp)) return false;
		return TRUE;
	}

	function _data_write_block($mode, $block) {
		if($mode!=FTP_BINARY) $block=preg_replace(&quot;/\r\n|\r|\n/&quot;, $this-&gt;_eol_code[$this-&gt;OS_remote], $block);
		do {
			if(($t=@fwrite($this-&gt;_ftp_data_sock, $block))===FALSE) {
				$this-&gt;PushError(&quot;_data_write&quot;,&quot;Can't write to socket&quot;);
				return FALSE;
			}
			$block=substr($block, $t);
		} while(!empty($block));
		return true;
	}

	function _data_close() {
		@fclose($this-&gt;_ftp_data_sock);
		$this-&gt;SendMSG(&quot;Disconnected data from remote host&quot;);
		return TRUE;
	}

	function _quit($force=FALSE) {
		if($this-&gt;_connected or $force) {
			@fclose($this-&gt;_ftp_control_sock);
			$this-&gt;_connected=false;
			$this-&gt;SendMSG(&quot;Socket closed&quot;);
		}
	}
}

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