Subversion Repositories Applications.papyrus

<?php

/*************************************************

Snoopy - the PHP net client

Author: Monte Ohrt <monte@ispi.net>

Copyright (c): 1999-2000 ispi, all rights reserved

Version: 1.0

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

You may contact the author of Snoopy by e-mail at:

monte@ispi.net

Or, write to:

Monte Ohrt

CTO, ispi

237 S. 70th suite 220

Lincoln, NE 68510

The latest version of Snoopy can be obtained from:

http://snoopy.sourceforge.com

*************************************************/

class Snoopy

{

	/**** Public variables ****/

	/* user definable vars */

	var $host			=	"www.php.net";		// host name we are connecting to

	var $port			=	80;					// port we are connecting to

	var $proxy_host		=	"";					// proxy host to use

	var $proxy_port		=	"";					// proxy port to use

	var $agent			=	"Snoopy v1.0";		// agent we masquerade as

	var	$referer		=	"";					// referer info to pass

	var $cookies		=	array();			// array of cookies to pass

												// $cookies["username"]="joe";

	var	$rawheaders		=	array();			// array of raw headers to send

												// $rawheaders["Content-type"]="text/html";

	var $maxredirs		=	5;					// http redirection depth maximum. 0 = disallow

	var $lastredirectaddr	=	"";				// contains address of last redirected address

	var	$offsiteok		=	true;				// allows redirection off-site

	var $maxframes		=	0;					// frame content depth maximum. 0 = disallow

	var $expandlinks	=	true;				// expand links to fully qualified URLs.

												// this only applies to fetchlinks()

												// or submitlinks()

	var $passcookies	=	true;				// pass set cookies back through redirects

												// NOTE: this currently does not respect

												// dates, domains or paths.

	var	$user			=	"";					// user for http authentication

	var	$pass			=	"";					// password for http authentication

	// http accept types

	var $accept			=	"image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*";

	var $results		=	"";					// where the content is put

	var $error			=	"";					// error messages sent here

	var	$response_code	=	"";					// response code returned from server

	var	$headers		=	array();			// headers returned from server sent here

	var	$maxlength		=	500000;				// max return data length (body)

	var $read_timeout	=	0;					// timeout on read operations, in seconds

												// supported only since PHP 4 Beta 4

												// set to 0 to disallow timeouts

	var $timed_out		=	false;				// if a read operation timed out

	var	$status			=	0;					// http request status

	var	$curl_path		=	"/usr/bin/curl";

												// Snoopy will use cURL for fetching

												// SSL content if a full system path to

												// the cURL binary is supplied here.

												// set to false if you do not have

												// cURL installed. See http://curl.haxx.se

												// for details on installing cURL.

												// Snoopy does *not* use the cURL

												// library functions built into php,

												// as these functions are not stable

												// as of this Snoopy release.

	// send Accept-encoding: gzip?

	var $use_gzip		= true;

	/**** Private variables ****/

	var	$_maxlinelen	=	4096;				// max line length (headers)

	var $_httpmethod	=	"GET";				// default http request method

	var $_httpversion	=	"HTTP/1.0";			// default http request version

	var $_submit_method	=	"POST";				// default submit method

	var $_submit_type	=	"application/x-www-form-urlencoded";	// default submit type

	var $_mime_boundary	=   "";					// MIME boundary for multipart/form-data submit type

	var $_redirectaddr	=	false;				// will be set if page fetched is a redirect

	var $_redirectdepth	=	0;					// increments on an http redirect

	var $_frameurls		= 	array();			// frame src urls

	var $_framedepth	=	0;					// increments on frame depth

	var $_isproxy		=	false;				// set if using a proxy server

	var $_fp_timeout	=	30;					// timeout for socket connection

/*======================================================================*\

	Function:	fetch

	Purpose:	fetch the contents of a web page

				(and possibly other protocols in the

				future like ftp, nntp, gopher, etc.)

	Input:		$URI	the location of the page to fetch

	Output:		$this->results	the output text from the fetch

\*======================================================================*/

	function fetch($URI)

	{

		//preg_match("|^([^:]+)://([^:/]+)(:[\d]+)*(.*)|",$URI,$URI_PARTS);

		$URI_PARTS = parse_url($URI);

		if (!empty($URI_PARTS["user"]))

			$this->user = $URI_PARTS["user"];

		if (!empty($URI_PARTS["pass"]))

			$this->pass = $URI_PARTS["pass"];

		switch($URI_PARTS["scheme"])

		{

			case "http":

				$this->host = $URI_PARTS["host"];

				if(!empty($URI_PARTS["port"]))

					$this->port = $URI_PARTS["port"];

				if($this->_connect($fp))

				{

					if($this->_isproxy)

					{

						// using proxy, send entire URI

						$this->_httprequest($URI,$fp,$URI,$this->_httpmethod);

					}

					else

					{

						$path = $URI_PARTS["path"].(isset($URI_PARTS["query"]) ? "?".$URI_PARTS["query"] : "");

						// no proxy, send only the path

						$this->_httprequest($path, $fp, $URI, $this->_httpmethod);

					}

					$this->_disconnect($fp);

					if($this->_redirectaddr)

					{

						/* url was redirected, check if we've hit the max depth */

						if($this->maxredirs > $this->_redirectdepth)

						{

							// only follow redirect if it's on this site, or offsiteok is true

							if(preg_match("|^http://".preg_quote($this->host)."|i",$this->_redirectaddr) || $this->offsiteok)

							{

								/* follow the redirect */

								$this->_redirectdepth++;

								$this->lastredirectaddr=$this->_redirectaddr;

								$this->fetch($this->_redirectaddr);

							}

						}

					}

					if($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0)

					{

						$frameurls = $this->_frameurls;

						$this->_frameurls = array();

						while(list(,$frameurl) = each($frameurls))

						{

							if($this->_framedepth < $this->maxframes)

							{

								$this->fetch($frameurl);

								$this->_framedepth++;

							}

							else

								break;

						}

					}

				}

				else

				{

					return false;

				}

				return true;

				break;

			case "https":

				if(!$this->curl_path || (!is_executable($this->curl_path))) {

					$this->error = "Bad curl ($this->curl_path), can't fetch HTTPS \n";

					return false;

				}

				$this->host = $URI_PARTS["host"];

				if(!empty($URI_PARTS["port"]))

					$this->port = $URI_PARTS["port"];

				if($this->_isproxy)

				{

					// using proxy, send entire URI

					$this->_httpsrequest($URI,$URI,$this->_httpmethod);

				}

				else

				{

					$path = $URI_PARTS["path"].($URI_PARTS["query"] ? "?".$URI_PARTS["query"] : "");

					// no proxy, send only the path

					$this->_httpsrequest($path, $URI, $this->_httpmethod);

				}

				if($this->_redirectaddr)

				{

					/* url was redirected, check if we've hit the max depth */

					if($this->maxredirs > $this->_redirectdepth)

					{

						// only follow redirect if it's on this site, or offsiteok is true

						if(preg_match("|^http://".preg_quote($this->host)."|i",$this->_redirectaddr) || $this->offsiteok)

						{

							/* follow the redirect */

							$this->_redirectdepth++;

							$this->lastredirectaddr=$this->_redirectaddr;

							$this->fetch($this->_redirectaddr);

						}

					}

				}

				if($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0)

				{

					$frameurls = $this->_frameurls;

					$this->_frameurls = array();

					while(list(,$frameurl) = each($frameurls))

					{

						if($this->_framedepth < $this->maxframes)

						{

							$this->fetch($frameurl);

							$this->_framedepth++;

						}

						else

							break;

					}

				}

				return true;

				break;

			default:

				// not a valid protocol

				$this->error	=	'Invalid protocol "'.$URI_PARTS["scheme"].'"\n';

				return false;

				break;

		}

		return true;

	}

/*======================================================================*\

	Private functions

\*======================================================================*/

/*======================================================================*\

	Function:	_striplinks

	Purpose:	strip the hyperlinks from an html document

	Input:		$document	document to strip.

	Output:		$match		an array of the links

\*======================================================================*/

	function _striplinks($document)

	{

		preg_match_all("'<\s*a\s+.*href\s*=\s*			# find <a href=

						([\"\'])?					# find single or double quote

						(?(1) (.*?)\\1 | ([^\s\>]+))		# if quote found, match up to next matching

													# quote, otherwise match up to next space

						'isx",$document,$links);

		// catenate the non-empty matches from the conditional subpattern

		while(list($key,$val) = each($links[2]))

		{

			if(!empty($val))

				$match[] = $val;

		}

		while(list($key,$val) = each($links[3]))

		{

			if(!empty($val))

				$match[] = $val;

		}

		// return the links

		return $match;

	}

/*======================================================================*\

	Function:	_stripform

	Purpose:	strip the form elements from an html document

	Input:		$document	document to strip.

	Output:		$match		an array of the links

\*======================================================================*/

	function _stripform($document)

	{

		preg_match_all("'<\/?(FORM|INPUT|SELECT|TEXTAREA|(OPTION))[^<>]*>(?(2)(.*(?=<\/?(option|select)[^<>]*>[\r\n]*)|(?=[\r\n]*))|(?=[\r\n]*))'Usi",$document,$elements);

		// catenate the matches

		$match = implode("\r\n",$elements[0]);

		// return the links

		return $match;

	}

/*======================================================================*\

	Function:	_striptext

	Purpose:	strip the text from an html document

	Input:		$document	document to strip.

	Output:		$text		the resulting text

\*======================================================================*/

	function _striptext($document)

	{

		// I didn't use preg eval (//e) since that is only available in PHP 4.0.

		// so, list your entities one by one here. I included some of the

		// more common ones.

		$search = array("'<script[^>]*?>.*?</script>'si",	// strip out javascript

						"'<[\/\!]*?[^<>]*?>'si",			// strip out html tags

						"'([\r\n])[\s]+'",					// strip out white space

						"'&(quote|#34);'i",					// replace html entities

						"'&(amp|#38);'i",

						"'&(lt|#60);'i",

						"'&(gt|#62);'i",

						"'&(nbsp|#160);'i",

						"'&(iexcl|#161);'i",

						"'&(cent|#162);'i",

						"'&(pound|#163);'i",

						"'&(copy|#169);'i"

						);

		$replace = array(	"",

							"",

							"\\1",

							"\"",

							"&",

							"<",

							">",

							" ",

							chr(161),

							chr(162),

							chr(163),

							chr(169));

		$text = preg_replace($search,$replace,$document);

		return $text;

	}

/*======================================================================*\

	Function:	_expandlinks

	Purpose:	expand each link into a fully qualified URL

	Input:		$links			the links to qualify

				$URI			the full URI to get the base from

	Output:		$expandedLinks	the expanded links

\*======================================================================*/

	function _expandlinks($links,$URI)

	{

		preg_match("/^[^\?]+/",$URI,$match);

		$match = preg_replace("|/[^\/\.]+\.[^\/\.]+$|","",$match[0]);

		$search = array( 	"|^http://".preg_quote($this->host)."|i",

							"|^(?!http://)(\/)?(?!mailto:)|i",

							"|/\./|",

							"|/[^\/]+/\.\./|"

						);

		$replace = array(	"",

							$match."/",

							"/",

							"/"

						);

		$expandedLinks = preg_replace($search,$replace,$links);

		return $expandedLinks;

	}

/*======================================================================*\

	Function:	_httprequest

	Purpose:	go get the http data from the server

	Input:		$url		the url to fetch

				$fp			the current open file pointer

				$URI		the full URI

				$body		body contents to send if any (POST)

	Output:

\*======================================================================*/

	function _httprequest($url,$fp,$URI,$http_method,$content_type="",$body="")

	{

		if($this->passcookies && $this->_redirectaddr)

			$this->setcookies();

		$URI_PARTS = parse_url($URI);

		if(empty($url))

			$url = "/";

		$headers = $http_method." ".$url." ".$this->_httpversion."\r\n";

		if(!empty($this->agent))

			$headers .= "User-Agent: ".$this->agent."\r\n";

		if(!empty($this->host) && !isset($this->rawheaders['Host']))

			$headers .= "Host: ".$this->host."\r\n";

		if(!empty($this->accept))

			$headers .= "Accept: ".$this->accept."\r\n";

		if($this->use_gzip) {

			// make sure PHP was built with --with-zlib

			// and we can handle gzipp'ed data

			if ( function_exists(gzinflate) ) {

			   $headers .= "Accept-encoding: gzip\r\n";

			}

			else {

			   trigger_error(

			   	"use_gzip is on, but PHP was built without zlib support.".

				"  Requesting file(s) without gzip encoding.",

				E_USER_NOTICE);

			}

		}

		if(!empty($this->referer))

			$headers .= "Referer: ".$this->referer."\r\n";

		if(!empty($this->cookies))

		{

			if(!is_array($this->cookies))

				$this->cookies = (array)$this->cookies;

			reset($this->cookies);

			if ( count($this->cookies) > 0 ) {

				$cookie_headers .= 'Cookie: ';

				foreach ( $this->cookies as $cookieKey => $cookieVal ) {

				$cookie_headers .= $cookieKey."=".urlencode($cookieVal)."; ";

				}

				$headers .= substr($cookie_headers,0,-2) . "\r\n";

			}

		}

		if(!empty($this->rawheaders))

		{

			if(!is_array($this->rawheaders))

				$this->rawheaders = (array)$this->rawheaders;

			while(list($headerKey,$headerVal) = each($this->rawheaders))

				$headers .= $headerKey.": ".$headerVal."\r\n";

		}

		if(!empty($content_type)) {

			$headers .= "Content-type: $content_type";

			if ($content_type == "multipart/form-data")

				$headers .= "; boundary=".$this->_mime_boundary;

			$headers .= "\r\n";

		}

		if(!empty($body))

			$headers .= "Content-length: ".strlen($body)."\r\n";

		if(!empty($this->user) || !empty($this->pass))

			$headers .= "Authorization: BASIC ".base64_encode($this->user.":".$this->pass)."\r\n";

		$headers .= "\r\n";

		// set the read timeout if needed

		if ($this->read_timeout > 0)

			socket_set_timeout($fp, $this->read_timeout);

		$this->timed_out = false;

		fwrite($fp,$headers.$body,strlen($headers.$body));

		$this->_redirectaddr = false;

		unset($this->headers);

		// content was returned gzip encoded?

		$is_gzipped = false;

		while($currentHeader = fgets($fp,$this->_maxlinelen))

		{

			if ($this->read_timeout > 0 && $this->_check_timeout($fp))

			{

				$this->status=-100;

				return false;

			}

		//	if($currentHeader == "\r\n")

			if(preg_match("/^\r?\n$/", $currentHeader) )

			      break;

			// if a header begins with Location: or URI:, set the redirect

			if(preg_match("/^(Location:|URI:)/i",$currentHeader))

			{

				// get URL portion of the redirect

				preg_match("/^(Location:|URI:)\s+(.*)/",chop($currentHeader),$matches);

				// look for :// in the Location header to see if hostname is included

				if(!preg_match("|\:\/\/|",$matches[2]))

				{

					// no host in the path, so prepend

					$this->_redirectaddr = $URI_PARTS["scheme"]."://".$this->host.":".$this->port;

					// eliminate double slash

					if(!preg_match("|^/|",$matches[2]))

							$this->_redirectaddr .= "/".$matches[2];

					else

							$this->_redirectaddr .= $matches[2];

				}

				else

					$this->_redirectaddr = $matches[2];

			}

			if(preg_match("|^HTTP/|",$currentHeader))

			{

                if(preg_match("|^HTTP/[^\s]*\s(.*?)\s|",$currentHeader, $status))

				{

					$this->status= $status[1];

                }

				$this->response_code = $currentHeader;

			}

			if (preg_match("/Content-Encoding: gzip/", $currentHeader) ) {

				$is_gzipped = true;

			}

			$this->headers[] = $currentHeader;

		}

		# $results = fread($fp, $this->maxlength);

		$results = "";

		while ( $data = fread($fp, $this->maxlength) ) {

		    $results .= $data;

		    if (

		        strlen($results) > $this->maxlength ) {

		        break;

		    }

		}

		// gunzip

		if ( $is_gzipped ) {

			// per http://www.php.net/manual/en/function.gzencode.php

			$results = substr($results, 10);

			$results = gzinflate($results);

		}

		if ($this->read_timeout > 0 && $this->_check_timeout($fp))

		{

			$this->status=-100;

			return false;

		}

		// check if there is a a redirect meta tag

		if(preg_match("'<meta[\s]*http-equiv[^>]*?content[\s]*=[\s]*[\"\']?\d+;[\s]+URL[\s]*=[\s]*([^\"\']*?)[\"\']?>'i",$results,$match))

		{

			$this->_redirectaddr = $this->_expandlinks($match[1],$URI);

		}

		// have we hit our frame depth and is there frame src to fetch?

		if(($this->_framedepth < $this->maxframes) && preg_match_all("'<frame\s+.*src[\s]*=[\'\"]?([^\'\"\>]+)'i",$results,$match))

		{

			$this->results[] = $results;

			for($x=0; $x<count($match[1]); $x++)

				$this->_frameurls[] = $this->_expandlinks($match[1][$x],$URI_PARTS["scheme"]."://".$this->host);

		}

		// have we already fetched framed content?

		elseif(is_array($this->results))

			$this->results[] = $results;

		// no framed content

		else

			$this->results = $results;

		return true;

	}

/*======================================================================*\

	Function:	_httpsrequest

	Purpose:	go get the https data from the server using curl

	Input:		$url		the url to fetch

				$URI		the full URI

				$body		body contents to send if any (POST)

	Output:

\*======================================================================*/

	function _httpsrequest($url,$URI,$http_method,$content_type="",$body="")

	{

		if($this->passcookies && $this->_redirectaddr)

			$this->setcookies();

		$headers = array();

		$URI_PARTS = parse_url($URI);

		if(empty($url))

			$url = "/";

		// GET ... header not needed for curl

		//$headers[] = $http_method." ".$url." ".$this->_httpversion;

		if(!empty($this->agent))

			$headers[] = "User-Agent: ".$this->agent;

		if(!empty($this->host))

			$headers[] = "Host: ".$this->host;

		if(!empty($this->accept))

			$headers[] = "Accept: ".$this->accept;

		if(!empty($this->referer))

			$headers[] = "Referer: ".$this->referer;

		if(!empty($this->cookies))

		{

			if(!is_array($this->cookies))

				$this->cookies = (array)$this->cookies;

			reset($this->cookies);

			if ( count($this->cookies) > 0 ) {

				$cookie_str = 'Cookie: ';

				foreach ( $this->cookies as $cookieKey => $cookieVal ) {

				$cookie_str .= $cookieKey."=".urlencode($cookieVal)."; ";

				}

				$headers[] = substr($cookie_str,0,-2);

			}

		}

		if(!empty($this->rawheaders))

		{

			if(!is_array($this->rawheaders))

				$this->rawheaders = (array)$this->rawheaders;

			while(list($headerKey,$headerVal) = each($this->rawheaders))

				$headers[] = $headerKey.": ".$headerVal;

		}

		if(!empty($content_type)) {

			if ($content_type == "multipart/form-data")

				$headers[] = "Content-type: $content_type; boundary=".$this->_mime_boundary;

			else

				$headers[] = "Content-type: $content_type";

		}

		if(!empty($body))

			$headers[] = "Content-length: ".strlen($body);

		if(!empty($this->user) || !empty($this->pass))

			$headers[] = "Authorization: BASIC ".base64_encode($this->user.":".$this->pass);

		for($curr_header = 0; $curr_header < count($headers); $curr_header++) {

			$cmdline_params .= " -H \"".$headers[$curr_header]."\"";

		}

		if(!empty($body))

			$cmdline_params .= " -d \"$body\"";

		if($this->read_timeout > 0)

			$cmdline_params .= " -m ".$this->read_timeout;

		$headerfile = uniqid(time());

		# accept self-signed certs

		$cmdline_params .= " -k";

		exec($this->curl_path." -D \"/tmp/$headerfile\"".escapeshellcmd($cmdline_params)." ".escapeshellcmd($URI),$results,$return);

		if($return)

		{

			$this->error = "Error: cURL could not retrieve the document, error $return.";

			return false;

		}

		$results = implode("\r\n",$results);

		$result_headers = file("/tmp/$headerfile");

		$this->_redirectaddr = false;

		unset($this->headers);

		for($currentHeader = 0; $currentHeader < count($result_headers); $currentHeader++)

		{

			// if a header begins with Location: or URI:, set the redirect

			if(preg_match("/^(Location: |URI: )/i",$result_headers[$currentHeader]))

			{

				// get URL portion of the redirect

				preg_match("/^(Location: |URI:)(.*)/",chop($result_headers[$currentHeader]),$matches);

				// look for :// in the Location header to see if hostname is included

				if(!preg_match("|\:\/\/|",$matches[2]))

				{

					// no host in the path, so prepend

					$this->_redirectaddr = $URI_PARTS["scheme"]."://".$this->host.":".$this->port;

					// eliminate double slash

					if(!preg_match("|^/|",$matches[2]))

							$this->_redirectaddr .= "/".$matches[2];

					else

							$this->_redirectaddr .= $matches[2];

				}

				else

					$this->_redirectaddr = $matches[2];

			}

			if(preg_match("|^HTTP/|",$result_headers[$currentHeader]))

			{

			    $this->response_code = $result_headers[$currentHeader];

			    if(preg_match("|^HTTP/[^\s]*\s(.*?)\s|",$this->response_code, $match))

			    {

				$this->status= $match[1];

                	    }

			}

			$this->headers[] = $result_headers[$currentHeader];

		}

		// check if there is a a redirect meta tag

		if(preg_match("'<meta[\s]*http-equiv[^>]*?content[\s]*=[\s]*[\"\']?\d+;[\s]+URL[\s]*=[\s]*([^\"\']*?)[\"\']?>'i",$results,$match))

		{

			$this->_redirectaddr = $this->_expandlinks($match[1],$URI);

		}

		// have we hit our frame depth and is there frame src to fetch?

		if(($this->_framedepth < $this->maxframes) && preg_match_all("'<frame\s+.*src[\s]*=[\'\"]?([^\'\"\>]+)'i",$results,$match))

		{

			$this->results[] = $results;

			for($x=0; $x<count($match[1]); $x++)

				$this->_frameurls[] = $this->_expandlinks($match[1][$x],$URI_PARTS["scheme"]."://".$this->host);

		}

		// have we already fetched framed content?

		elseif(is_array($this->results))

			$this->results[] = $results;

		// no framed content

		else

			$this->results = $results;

		unlink("/tmp/$headerfile");

		return true;

	}

/*======================================================================*\

	Function:	setcookies()

	Purpose:	set cookies for a redirection

\*======================================================================*/

	function setcookies()

	{

		for($x=0; $x<count($this->headers); $x++)

		{

		if(preg_match("/^set-cookie:[\s]+([^=]+)=([^;]+)/i", $this->headers[$x],$match))

			$this->cookies[$match[1]] = $match[2];

		}

	}

/*======================================================================*\

	Function:	_check_timeout

	Purpose:	checks whether timeout has occurred

	Input:		$fp	file pointer

\*======================================================================*/

	function _check_timeout($fp)

	{

		if ($this->read_timeout > 0) {

			$fp_status = socket_get_status($fp);

			if ($fp_status["timed_out"]) {

				$this->timed_out = true;

				return true;

			}

		}

		return false;

	}

/*======================================================================*\

	Function:	_connect

	Purpose:	make a socket connection

	Input:		$fp	file pointer

\*======================================================================*/

	function _connect(&$fp)

	{

		if(!empty($this->proxy_host) && !empty($this->proxy_port))

			{

				$this->_isproxy = true;

				$host = $this->proxy_host;

				$port = $this->proxy_port;

			}

		else

		{

			$host = $this->host;

			$port = $this->port;

		}

		$this->status = 0;

		if($fp = fsockopen(

					$host,

					$port,

					$errno,

					$errstr,

					$this->_fp_timeout

					))

		{

			// socket connection succeeded

			return true;

		}

		else

		{

			// socket connection failed

			$this->status = $errno;

			switch($errno)

			{

				case -3:

					$this->error="socket creation failed (-3)";

				case -4:

					$this->error="dns lookup failure (-4)";

				case -5:

					$this->error="connection refused or timed out (-5)";

				default:

					$this->error="connection failed (".$errno.")";

			}

			return false;

		}

	}

/*======================================================================*\

	Function:	_disconnect

	Purpose:	disconnect a socket connection

	Input:		$fp	file pointer

\*======================================================================*/

	function _disconnect($fp)

	{

		return(fclose($fp));

	}

/*======================================================================*\

	Function:	_prepare_post_body

	Purpose:	Prepare post body according to encoding type

	Input:		$formvars  - form variables

				$formfiles - form upload files

	Output:		post body

\*======================================================================*/

	function _prepare_post_body($formvars, $formfiles)

	{

		settype($formvars, "array");

		settype($formfiles, "array");

		if (count($formvars) == 0 && count($formfiles) == 0)

			return;

		switch ($this->_submit_type) {

			case "application/x-www-form-urlencoded":

				reset($formvars);

				while(list($key,$val) = each($formvars)) {

					if (is_array($val) || is_object($val)) {

						while (list($cur_key, $cur_val) = each($val)) {

							$postdata .= urlencode($key)."[]=".urlencode($cur_val)."&";

						}

					} else

						$postdata .= urlencode($key)."=".urlencode($val)."&";

				}

				break;

			case "multipart/form-data":

				$this->_mime_boundary = "Snoopy".md5(uniqid(microtime()));

				reset($formvars);

				while(list($key,$val) = each($formvars)) {

					if (is_array($val) || is_object($val)) {

						while (list($cur_key, $cur_val) = each($val)) {

							$postdata .= "--".$this->_mime_boundary."\r\n";

							$postdata .= "Content-Disposition: form-data; name=\"$key\[\]\"\r\n\r\n";

							$postdata .= "$cur_val\r\n";

						}

					} else {

						$postdata .= "--".$this->_mime_boundary."\r\n";

						$postdata .= "Content-Disposition: form-data; name=\"$key\"\r\n\r\n";

						$postdata .= "$val\r\n";

					}

				}

				reset($formfiles);

				while (list($field_name, $file_names) = each($formfiles)) {

					settype($file_names, "array");

					while (list(, $file_name) = each($file_names)) {

						if (!is_readable($file_name)) continue;

						$fp = fopen($file_name, "r");

						$file_content = fread($fp, filesize($file_name));

						fclose($fp);

						$base_name = basename($file_name);

						$postdata .= "--".$this->_mime_boundary."\r\n";

						$postdata .= "Content-Disposition: form-data; name=\"$field_name\"; filename=\"$base_name\"\r\n\r\n";

						$postdata .= "$file_content\r\n";

					}

				}

				$postdata .= "--".$this->_mime_boundary."--\r\n";

				break;

		}

		return $postdata;

	}

}

?>