snoopy.class.php

<?php
/*************************************************

Snoopy - the PHP net client
Author: Monte Ohrt <monte@ispi.net>
Copyright (c): 1999-2008 New Digital Group, all rights reserved
Version: 1.2.4

* 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@ohrt.com

The latest version of Snoopy can be obtained from:
http://snoopy.sourceforge.net/

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

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 $proxy_user		=	"";					// proxy user to use
	var $proxy_pass		=	"";					// proxy password to use

	var $agent			=	"Mozilla/5.0";	// 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()
	// submitlinks(), and submittext()
	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			=	"application/json, text/javascript, */*; q=0.01";

	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 $temp_dir		=	"/tmp";				// temporary directory that the webserver
	// has permission to write to.
	// under Windows, this should be C:\temp

	var	$curl_path		=	"/usr/local/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.

	/**** 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 = $URI_PARTS["pass"];
		if (empty($URI_PARTS["query"]))
			$URI_PARTS["query"] = '';
		if (empty($URI_PARTS["path"]))
			$URI_PARTS["path"] = '';

		switch(strtolower($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 = $URI_PARTS["path"].($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);
								$this->_framedepth++;
							}
							else
								break;
						}
					}
				}
				else
				{
					return false;
				}
				return true;
				break;
			case "https":
				if (!function_exists('curl_init')) {
					if(!$this->curl_path)
						return false;
					if(function_exists("is_executable"))
						if (!is_executable($this->curl_path))
						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 > $this->_redirectdepth)
					{
						// only follow redirect if it's on this site, or offsiteok is true
						if(preg_match("|^https://".preg_quote($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;
	}

	/*======================================================================*\
	 Function:	submit
	Purpose:	submit an http form
	Input:		$URI	the location to post the data
	$formvars	the formvars to use.
	format: $formvars["var"] = "val";
	$formfiles  an array of files to submit
	format: $formfiles["var"] = "/dir/filename.ext";
	Output:		$this->results	the text output from the post
	\*======================================================================*/

	function submit($URI, $formvars="", $formfiles="")
	{
		unset($postdata);

		$postdata = $this->_prepare_post_body($formvars, $formfiles);
		$URI_PARTS = parse_url($URI);
		if (!empty($URI_PARTS["user"]))
			$this->user = $URI_PARTS["user"];
		if (!empty($URI_PARTS["pass"]))
			$this->pass = $URI_PARTS["pass"];
		if (empty($URI_PARTS["query"]))
			$URI_PARTS["query"] = '';
		if (empty($URI_PARTS["path"]))
			$URI_PARTS["path"] = '';

		switch(strtolower($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,$this->_submit_method,$this->_submit_type,$postdata);
					}
					else
					{
						$path = $URI_PARTS["path"].($URI_PARTS["query"] ? "?".$URI_PARTS["query"] : "");
						// no proxy, send only the path
						$this->_httprequest($path, $fp, $URI, $this->_submit_method, $this->_submit_type, $postdata);
					}
						
					$this->_disconnect($fp);

					if($this->_redirectaddr)
					{
						/* url was redirected, check if we've hit the max depth */
						if($this->maxredirs > $this->_redirectdepth)
						{
							if(!preg_match("|^".$URI_PARTS["scheme"]."://|", $this->_redirectaddr))
								$this->_redirectaddr = $this->_expandlinks($this->_redirectaddr,$URI_PARTS["scheme"]."://".$URI_PARTS["host"]);
								
							// 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;
								if( strpos( $this->_redirectaddr, "?" ) > 0 )
									$this->fetch($this->_redirectaddr); // the redirect has changed the request method from post to get
								else
									$this->submit($this->_redirectaddr,$formvars, $formfiles);
							}
						}
					}

					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 (!function_exists('curl_init')) {
				if(!$this->curl_path)
					return false;
				if(function_exists("is_executable"))
					if (!is_executable($this->curl_path))
					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->_submit_method, $this->_submit_type, $postdata);
				}
				else
				{
					$path = $URI_PARTS["path"].($URI_PARTS["query"] ? "?".$URI_PARTS["query"] : "");
					// no proxy, send only the path
					$this->_httpsrequest($path, $URI, $this->_submit_method, $this->_submit_type, $postdata);
				}

				if($this->_redirectaddr)
				{
					/* url was redirected, check if we've hit the max depth */
					if($this->maxredirs > $this->_redirectdepth)
					{
						if(!preg_match("|^".$URI_PARTS["scheme"]."://|", $this->_redirectaddr))
							$this->_redirectaddr = $this->_expandlinks($this->_redirectaddr,$URI_PARTS["scheme"]."://".$URI_PARTS["host"]);

						// only follow redirect if it's on this site, or offsiteok is true
						if(preg_match("|^https://".preg_quote($this->host)."|i",$this->_redirectaddr) || $this->offsiteok)
						{
							/* follow the redirect */
							$this->_redirectdepth++;
							$this->lastredirectaddr=$this->_redirectaddr;
							if( strpos( $this->_redirectaddr, "?" ) > 0 )
								$this->fetch($this->_redirectaddr); // the redirect has changed the request method from post to get
							else
								$this->submit($this->_redirectaddr,$formvars, $formfiles);
						}
					}
				}

				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;
	}

	/*======================================================================*\
	 Function:	fetchlinks
	Purpose:	fetch the links from a web page
	Input:		$URI	where you are fetching from
	Output:		$this->results	an array of the URLs
	\*======================================================================*/

	function fetchlinks($URI)
	{
		if ($this->fetch($URI))
		{
			if($this->lastredirectaddr)
				$URI = $this->lastredirectaddr;
			if(is_array($this->results))
			{
				for($x=0;$x<count($this->results);$x++)
					$this->results[$x] = $this->_striplinks($this->results[$x]);
			}
			else
				$this->results = $this->_striplinks($this->results);

			if($this->expandlinks)
				$this->results = $this->_expandlinks($this->results, $URI);
			return true;
		}
		else
			return false;
	}

	/*======================================================================*\
	 Function:	fetchform
	Purpose:	fetch the form elements from a web page
	Input:		$URI	where you are fetching from
	Output:		$this->results	the resulting html form
	\*======================================================================*/

	function fetchform($URI)
	{

		if ($this->fetch($URI))
		{

			if(is_array($this->results))
			{
				for($x=0;$x<count($this->results);$x++)
					$this->results[$x] = $this->_stripform($this->results[$x]);
			}
			else
				$this->results = $this->_stripform($this->results);
				
			return true;
		}
		else
			return false;
	}


	/*======================================================================*\
	 Function:	fetchtext
	Purpose:	fetch the text from a web page, stripping the links
	Input:		$URI	where you are fetching from
	Output:		$this->results	the text from the web page
	\*======================================================================*/

	function fetchtext($URI)
	{
		if($this->fetch($URI))
		{
			if(is_array($this->results))
			{
				for($x=0;$x<count($this->results);$x++)
					$this->results[$x] = $this->_striptext($this->results[$x]);
			}
			else
				$this->results = $this->_striptext($this->results);
			return true;
		}
		else
			return false;
	}

	/*======================================================================*\
	 Function:	submitlinks
	Purpose:	grab links from a form submission
	Input:		$URI	where you are submitting from
	Output:		$this->results	an array of the links from the post
	\*======================================================================*/

	function submitlinks($URI, $formvars="", $formfiles="")
	{
		if($this->submit($URI,$formvars, $formfiles))
		{
			if($this->lastredirectaddr)
				$URI = $this->lastredirectaddr;
			if(is_array($this->results))
			{
				for($x=0;$x<count($this->results);$x++)
				{
					$this->results[$x] = $this->_striplinks($this->results[$x]);
					if($this->expandlinks)
						$this->results[$x] = $this->_expandlinks($this->results[$x],$URI);
				}
			}
			else
			{
				$this->results = $this->_striplinks($this->results);
				if($this->expandlinks)
					$this->results = $this->_expandlinks($this->results,$URI);
			}
			return true;
		}
		else
			return false;
	}

	/*======================================================================*\
	 Function:	submittext
	Purpose:	grab text from a form submission
	Input:		$URI	where you are submitting from
	Output:		$this->results	the text from the web page
	\*======================================================================*/

	function submittext($URI, $formvars = "", $formfiles = "")
	{
		if($this->submit($URI,$formvars, $formfiles))
		{
			if($this->lastredirectaddr)
				$URI = $this->lastredirectaddr;
			if(is_array($this->results))
			{
				for($x=0;$x<count($this->results);$x++)
				{
					$this->results[$x] = $this->_striptext($this->results[$x]);
					if($this->expandlinks)
						$this->results[$x] = $this->_expandlinks($this->results[$x],$URI);
				}
			}
			else
			{
				$this->results = $this->_striptext($this->results);
				if($this->expandlinks)
					$this->results = $this->_expandlinks($this->results,$URI);
			}
			return true;
		}
		else
			return false;
	}



	/*======================================================================*\
	 Function:	set_submit_multipart
	Purpose:	Set the form submission content type to
	multipart/form-data
	\*======================================================================*/
	function set_submit_multipart()
	{
		$this->_submit_type = "multipart/form-data";
	}


	/*======================================================================*\
	 Function:	set_submit_normal
	Purpose:	Set the form submission content type to
	application/x-www-form-urlencoded
	\*======================================================================*/
	function set_submit_normal()
	{
		$this->_submit_type = "application/x-www-form-urlencoded";
	}




	/*======================================================================*\
	 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
				"'&(quot|#34|#034|#x22);'i",		// replace html entities
				"'&(amp|#38|#038|#x26);'i",			// added hexadecimal values
				"'&(lt|#60|#060|#x3c);'i",
				"'&(gt|#62|#062|#x3e);'i",
				"'&(nbsp|#160|#xa0);'i",
				"'&(iexcl|#161);'i",
				"'&(cent|#162);'i",
				"'&(pound|#163);'i",
				"'&(copy|#169);'i",
				"'&(reg|#174);'i",
				"'&(deg|#176);'i",
				"'&(#39|#039|#x27);'",
				"'&(euro|#8364);'i",				// europe
				"'&a(uml|UML);'",					// german
				"'&o(uml|UML);'",
				"'&u(uml|UML);'",
				"'&A(uml|UML);'",
				"'&O(uml|UML);'",
				"'&U(uml|UML);'",
				"'&szlig;'i",
		);
		$replace = array(	"",
				"",
				"\\1",
				"\"",
				"&",
				"<",
				">",
				" ",
				chr(161),
				chr(162),
				chr(163),
				chr(169),
				chr(174),
				chr(176),
				chr(39),
				chr(128),
				"�",
				"�",
				"�",
				"�",
				"�",
				"�",
				"�",
		);
			
		$text = preg_replace($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]);
		$match = preg_replace("|/$|","",$match);
		$match_part = parse_url($match);
		$match_root =
		$match_part["scheme"]."://".$match_part["host"];

		$search = array( 	"|^http://".preg_quote($this->host)."|i",
				"|^(\/)|i",
				"|^(?!http://)(?!mailto:)|i",
				"|/\./|",
				"|/[^\/]+/\.\./|"
		);

		$replace = array(	"",
				$match_root."/",
				$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="")
	{
		$cookie_headers = '';
		if($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;
			if(!empty($this->port) && $this->port!=80)
				$headers .= ":".$this->port;
			$headers .= "\r\n";
		}
		if(!empty($this->accept))
			$headers .= "Accept: ".$this->accept."\r\n";
		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";

		//add proxy auth headers
		if(!empty($this->proxy_user))
			$headers .= 'Proxy-Authorization: ' . 'Basic ' . base64_encode($this->proxy_user . ':' . $this->proxy_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);

		while($currentHeader = fgets($fp,$this->_maxlinelen))
		{
			if ($this->read_timeout > 0 && $this->_check_timeout($fp))
			{
				$this->status=-100;
				return false;
			}

			if($currentHeader == "\r\n")
				break;

			// if a header begins with Location: or URI:, set the redirect
			if(preg_match("/^(Location:|URI:)/i",$currentHeader))
			{
				// get URL portion of the redirect
				preg_match("/^(Location:|URI:)[ ]+(.*)/i",chop($currentHeader),$matches);
				// look for :// in the Location header to see if hostname is included
				if (!empty($matches)) {
					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;
			}

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

		$results = '';
		do {
			$_data = fread($fp, $this->maxlength);
			if (strlen($_data) == 0) {
				break;
			}
			$results .= $_data;
		} while(true);

		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($this->host))
			if(!empty($this->port) && $this->port!=80)
			$headers[] = "Host: ".$this->host.":".$this->port;
		else
			$headers[] = "Host: ".$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);
		if (function_exists('curl_init')) {
			$ch = curl_init();
			curl_setopt($ch, CURLOPT_URL, $URI);
			curl_setopt($ch, CURLOPT_HEADER, true); 
			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
			curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
			curl_setopt($ch, CURLOPT_SSLVERSION,3); 
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
			curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); 
			curl_setopt($ch, CURLOPT_TIMEOUT, $this->read_timeout);
			if(!empty($body)) {
				curl_setopt($ch, CURLOPT_POST, true);
				curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
			}
			$data = curl_exec($ch);
			if ($data === false) {
				$this->error = "Error: Curl error  ".curl_error($ch);
					return false;
			}
			$parts = explode("\r\n\r\n",$data,2);
			$result_headers = explode("\r\n",$parts[0]);
			$results = $parts[1];
			unset($parts);
		} else {
				for($curr_header = 0; $curr_header < count($headers); $curr_header++) {
					$safer_header = strtr( $headers[$curr_header], "\"", " " );
					$cmdline_params .= " -H \"".$safer_header."\"";
				}
		
				if(!empty($body))
					$cmdline_params .= " -d \"$body\"";
		
				if($this->read_timeout > 0)
					$cmdline_params .= " -m ".$this->read_timeout;
		
				$headerfile = tempnam($temp_dir, "sno");
		
				exec($this->curl_path." -k -D \"$headerfile\"".$cmdline_params." \"".escapeshellcmd($URI)."\"",$results,$return);
		
				if($return)
				{
					$this->error = "Error: cURL could not retrieve the document, error $return.";
					return false;
				}
				
				
			$results = implode("\r\n",$results);
	
			$result_headers = file("$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:)\s+(.*)/",chop($result_headers[$currentHeader]),$matches);
				// look for :// in the Location header to see if hostname is included
				if (!empty($matches)) {
					if(!preg_match("|\:\/\/|",$matches[2]))
					{
						// no host in the path, so prepend
						$this->_redirectaddr = $URI_PARTS["scheme"]."://".$this->host;
						// 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];

			$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 = $results;
		if (isset($headerfile) && file_exists($headerfile))
			unlink($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]] = urldecode($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");
		$postdata = '';

		if (count($formvars) == 0 && count($formfiles) == 0)
			return;
		if (is_string($formvars)) return $formvars;
		if((count($formvars) == 1) && isset($formvars[0])) return $formvars[0];
		switch ($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 = "--------".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)) {
						$file_content = file_get_contents($file_name);
						if (!$file_content) continue;

						$base_name = basename($file_name);

						$postdata .= "--".$this->_mime_boundary."\r\n";
						$postdata .= "Content-Disposition: form-data; name=\"$field_name\"; filename=\"$base_name\"\r\nContent-Type: image/jpeg\r\n\r\n";
						$postdata .= "$file_content\r\n";
					}
				}
				$postdata .= "--".$this->_mime_boundary."--\r\n";
				break;
		}

		return $postdata;
	}
}