<?php
/*
 * http.php
 *
 * @(#) $Header: /opt2/ena/metal/http/http.php,v 1.88 2011/10/24 08:26:56 mlemos Exp $
 *
 */

// No direct access to this file
defined('_JEXEC') or die('Restricted access');

define('HTTP_CLIENT_ERROR_UNSPECIFIED_ERROR',       -1);
define('HTTP_CLIENT_ERROR_NO_ERROR',                 0);
define('HTTP_CLIENT_ERROR_INVALID_SERVER_ADDRESS',   1);
define('HTTP_CLIENT_ERROR_CANNOT_CONNECT',           2);
define('HTTP_CLIENT_ERROR_COMMUNICATION_FAILURE',    3);
define('HTTP_CLIENT_ERROR_CANNOT_ACCESS_LOCAL_FILE', 4);
define('HTTP_CLIENT_ERROR_PROTOCOL_FAILURE',         5);
define('HTTP_CLIENT_ERROR_INVALID_PARAMETERS',       6);

class http_class
{
	var $host_name="";
	var $host_port=0;
	var $proxy_host_name="";
	var $proxy_host_port=80;
	var $socks_host_name = '';
	var $socks_host_port = 1080;
	var $socks_version = '5';

	var $protocol="http";
	var $request_method="GET";
	var $user_agent='httpclient (http://www.phpclasses.org/httpclient $Revision: 1.88 $)';
	var $accept='';
	var $authentication_mechanism="";
	var $user;
	var $password;
	var $realm;
	var $workstation;
	var $proxy_authentication_mechanism="";
	var $proxy_user;
	var $proxy_password;
	var $proxy_realm;
	var $proxy_workstation;
	var $request_uri="";
	var $request="";
	var $request_headers=array();
	var $request_user;
	var $request_password;
	var $request_realm;
	var $request_workstation;
	var $proxy_request_user;
	var $proxy_request_password;
	var $proxy_request_realm;
	var $proxy_request_workstation;
	var $request_body="";
	var $request_arguments=array();
	var $protocol_version="1.1";
	var $timeout=0;
	var $data_timeout=0;
	var $debug=0;
	var $log_debug=0;
	var $debug_response_body=1;
	var $html_debug=0;
	var $support_cookies=1;
	var $cookies=array();
	var $error="";
	var $error_code = HTTP_CLIENT_ERROR_NO_ERROR;
	var $exclude_address="";
	var $follow_redirect=0;
	var $redirection_limit=5;
	var $response_status="";
	var $response_message="";
	var $file_buffer_length=8000;
	var $force_multipart_form_post=0;
	var $prefer_curl = 0;
	var $keep_alive = 1;

	/* private variables - DO NOT ACCESS */

	var $state="Disconnected";
	var $use_curl=0;
	var $connection=0;
	var $content_length=0;
	var $response="";
	var $read_response=0;
	var $read_length=0;
	var $request_host="";
	var $next_token="";
	var $redirection_level=0;
	var $chunked=0;
	var $remaining_chunk=0;
	var $last_chunk_read=0;
	var $months=array(
		"Jan"=>"01",
		"Feb"=>"02",
		"Mar"=>"03",
		"Apr"=>"04",
		"May"=>"05",
		"Jun"=>"06",
		"Jul"=>"07",
		"Aug"=>"08",
		"Sep"=>"09",
		"Oct"=>"10",
		"Nov"=>"11",
		"Dec"=>"12");
	var $session='';
	var $connection_close=0;
	var $force_close = 0;
	var $connected_host = '';
	var $connected_port = -1;
	var $connected_ssl = 0;

	/* Private methods - DO NOT CALL */

	Function Tokenize($string,$separator="")
	{
		if(!strcmp($separator,""))
		{
			$separator=$string;
			$string=$this->next_token;
		}
		for($character=0;$character<strlen($separator);$character++)
		{
			if(GetType($position=strpos($string,$separator[$character]))=="integer")
				$found=(IsSet($found) ? min($found,$position) : $position);
		}
		if(IsSet($found))
		{
			$this->next_token=substr($string,$found+1);
			return(substr($string,0,$found));
		}
		else
		{
			$this->next_token="";
			return($string);
		}
	}

	Function CookieEncode($value, $name)
	{
		return($name ? str_replace("=", "%25", $value) : str_replace(";", "%3B", $value));
	}

	Function SetError($error, $error_code = HTTP_CLIENT_ERROR_UNSPECIFIED_ERROR)
	{
		$this->error_code = $error_code;
		return($this->error=$error);
	}

	Function SetPHPError($error, &$php_error_message, $error_code = HTTP_CLIENT_ERROR_UNSPECIFIED_ERROR)
	{
		if(IsSet($php_error_message)
		&& strlen($php_error_message))
			$error.=": ".$php_error_message;
		return($this->SetError($error, $error_code));
	}

	Function SetDataAccessError($error,$check_connection=0)
	{
		$this->error=$error;
		$this->error_code = HTTP_CLIENT_ERROR_COMMUNICATION_FAILURE;
		if(!$this->use_curl
		&& function_exists("socket_get_status"))
		{
			$status=socket_get_status($this->connection);
			if($status["timed_out"])
				$this->error.=": data access time out";
			elseif($status["eof"])
			{
				if($check_connection)
					$this->error="";
				else
					$this->error.=": the server disconnected";
			}
		}
	}

	Function OutputDebug($message)
	{
		if($this->log_debug)
			error_log($message);
		else
		{
			$message.="\n";
			if($this->html_debug)
				$message=str_replace("\n","<br />\n",HtmlEntities($message));
			echo $message;
			flush();
		}
	}

	Function GetLine()
	{
		for($line="";;)
		{
			if($this->use_curl)
			{
				$eol=strpos($this->response,"\n",$this->read_response);
				$data=($eol ? substr($this->response,$this->read_response,$eol+1-$this->read_response) : "");
				$this->read_response+=strlen($data);
			}
			else
			{
				if(feof($this->connection))
				{
					$this->SetDataAccessError("reached the end of data while reading from the HTTP server connection");
					return(0);
				}
				$data=fgets($this->connection,100);
			}
			if(GetType($data)!="string"
			|| strlen($data)==0)
			{
				$this->SetDataAccessError("it was not possible to read line from the HTTP server");
				return(0);
			}
			$line.=$data;
			$length=strlen($line);
			if($length
			&& !strcmp(substr($line,$length-1,1),"\n"))
			{
				$length-=(($length>=2 && !strcmp(substr($line,$length-2,1),"\r")) ? 2 : 1);
				$line=substr($line,0,$length);
				if($this->debug)
					$this->OutputDebug("S $line");
				return($line);
			}
		}
	}

	Function PutLine($line)
	{
		if($this->debug)
			$this->OutputDebug("C $line");
		if(!fputs($this->connection,$line."\r\n"))
		{
			$this->SetDataAccessError("it was not possible to send a line to the HTTP server");
			return(0);
		}
		return(1);
	}

	Function PutData($data)
	{
		if(strlen($data))
		{
			if($this->debug)
				$this->OutputDebug('C '.$data);
			if(!fputs($this->connection,$data))
			{
				$this->SetDataAccessError("it was not possible to send data to the HTTP server");
				return(0);
			}
		}
		return(1);
	}

	Function FlushData()
	{
		if(!fflush($this->connection))
		{
			$this->SetDataAccessError("it was not possible to send data to the HTTP server");
			return(0);
		}
		return(1);
	}

	Function ReadChunkSize()
	{
		if($this->remaining_chunk==0)
		{
			$debug=$this->debug;
			if(!$this->debug_response_body)
				$this->debug=0;
			$line=$this->GetLine();
			$this->debug=$debug;
			if(GetType($line)!="string")
				return($this->SetError("could not read chunk start: ".$this->error, $this->error_code));
			$this->remaining_chunk=hexdec($line);
			if($this->remaining_chunk == 0)
			{
				if(!$this->debug_response_body)
					$this->debug=0;
				$line=$this->GetLine();
				$this->debug=$debug;
				if(GetType($line)!="string")
					return($this->SetError("could not read chunk end: ".$this->error, $this->error_code));
			}
		}
		return("");
	}

	Function ReadBytes($length)
	{
		if($this->use_curl)
		{
			$bytes=substr($this->response,$this->read_response,min($length,strlen($this->response)-$this->read_response));
			$this->read_response+=strlen($bytes);
			if($this->debug
			&& $this->debug_response_body
			&& strlen($bytes))
				$this->OutputDebug("S ".$bytes);
		}
		else
		{
			if($this->chunked)
			{
				for($bytes="",$remaining=$length;$remaining;)
				{
					if(strlen($this->ReadChunkSize()))
						return("");
					if($this->remaining_chunk==0)
					{
						$this->last_chunk_read=1;
						break;
					}
					$ask=min($this->remaining_chunk,$remaining);
					$chunk=@fread($this->connection,$ask);
					$read=strlen($chunk);
					if($read==0)
					{
						$this->SetDataAccessError("it was not possible to read data chunk from the HTTP server");
						return("");
					}
					if($this->debug
					&& $this->debug_response_body)
						$this->OutputDebug("S ".$chunk);
					$bytes.=$chunk;
					$this->remaining_chunk-=$read;
					$remaining-=$read;
					if($this->remaining_chunk==0)
					{
						if(feof($this->connection))
							return($this->SetError("reached the end of data while reading the end of data chunk mark from the HTTP server", HTTP_CLIENT_ERROR_PROTOCOL_FAILURE));
						$data=@fread($this->connection,2);
						if(strcmp($data,"\r\n"))
						{
							$this->SetDataAccessError("it was not possible to read end of data chunk from the HTTP server");
							return("");
						}
					}
				}
			}
			else
			{
				$bytes=@fread($this->connection,$length);
				if(strlen($bytes))
				{
					if($this->debug
					&& $this->debug_response_body)
						$this->OutputDebug("S ".$bytes);
				}
				else
					$this->SetDataAccessError("it was not possible to read data from the HTTP server", $this->connection_close);
			}
		}
		return($bytes);
	}

	Function EndOfInput()
	{
		if($this->use_curl)
			return($this->read_response>=strlen($this->response));
		if($this->chunked)
			return($this->last_chunk_read);
		if($this->content_length_set)
			return($this->content_length <= $this->read_length);
		return(feof($this->connection));
	}

	Function Resolve($domain, &$ip, $server_type)
	{
		if(preg_match('/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/',$domain))
			$ip=$domain;
		else
		{
			if($this->debug)
				$this->OutputDebug('Resolving '.$server_type.' server domain "'.$domain.'"...');
			if(!strcmp($ip=@gethostbyname($domain),$domain))
				$ip="";
		}
		if(strlen($ip)==0
		|| (strlen($this->exclude_address)
		&& !strcmp(@gethostbyname($this->exclude_address),$ip)))
			return($this->SetError("could not resolve the host domain \"".$domain."\"", HTTP_CLIENT_ERROR_INVALID_SERVER_ADDRESS));
		return('');
	}

	Function Connect($host_name, $host_port, $ssl, $server_type = 'HTTP')
	{
		$domain=$host_name;
		$port = $host_port;
		if(strlen($error = $this->Resolve($domain, $ip, $server_type)))
			return($error);
		if(strlen($this->socks_host_name))
		{
			switch($this->socks_version)
			{
				case '4':
					$version = 4;
					break;
				case '5':
					$version = 5;
					break;
				default:
					return('it was not specified a supported SOCKS protocol version');
					break;
			}
			$host_ip = $ip;
			$port = $this->socks_host_port;
			$host_server_type = $server_type;
			$server_type = 'SOCKS';
			if(strlen($error = $this->Resolve($this->socks_host_name, $ip, $server_type)))
				return($error);
		}
		if($this->debug)
			$this->OutputDebug('Connecting to '.$server_type.' server IP '.$ip.' port '.$port.'...');
		if($ssl)
			$ip="ssl://".$host_name;
		if(($this->connection=($this->timeout ? @fsockopen($ip, $port, $errno, $error, $this->timeout) : @fsockopen($ip, $port, $errno)))==0)
		{
			$error_code = HTTP_CLIENT_ERROR_CANNOT_CONNECT;
			switch($errno)
			{
				case -3:
					return($this->SetError("socket could not be created", $error_code));
				case -4:
					return($this->SetError("dns lookup on hostname \"".$host_name."\" failed", $error_code));
				case -5:
					return($this->SetError("connection refused or timed out", $error_code));
				case -6:
					return($this->SetError("fdopen() call failed", $error_code));
				case -7:
					return($this->SetError("setvbuf() call failed", $error_code));
				default:
					return($this->SetPHPError($errno." could not connect to the host \"".$host_name."\"",$php_errormsg, $error_code));
			}
		}
		else
		{
			if($this->data_timeout
			&& function_exists("socket_set_timeout"))
				socket_set_timeout($this->connection,$this->data_timeout,0);
			if(strlen($this->socks_host_name))
			{
				if($this->debug)
					$this->OutputDebug('Connected to the SOCKS server '.$this->socks_host_name);
				$send_error = 'it was not possible to send data to the SOCKS server';
				$receive_error = 'it was not possible to receive data from the SOCKS server';
				switch($version)
				{
					case 4:
						$command = 1;
						$user = '';
						if(!fputs($this->connection, chr($version).chr($command).pack('nN', $host_port, ip2long($host_ip)).$user.Chr(0)))
							$error = $this->SetDataAccessError($send_error);
						else
						{
							$response = fgets($this->connection, 9);
							if(strlen($response) != 8)
								$error = $this->SetDataAccessError($receive_error);
							else
							{
								$socks_errors = array(
									"\x5a"=>'',
									"\x5b"=>'request rejected',
									"\x5c"=>'request failed because client is not running identd (or not reachable from the server)',
									"\x5d"=>'request failed because client\'s identd could not confirm the user ID string in the request',
								);
								$error_code = $response[1];
								$error = (IsSet($socks_errors[$error_code]) ? $socks_errors[$error_code] : 'unknown');
								if(strlen($error))
									$error = 'SOCKS error: '.$error;
							}
						}
						break;
					case 5:
						if($this->debug)
							$this->OutputDebug('Negotiating the authentication method ...');
						$methods = 1;
						$method = 0;
						if(!fputs($this->connection, chr($version).chr($methods).chr($method)))
							$error = $this->SetDataAccessError($send_error);
						else
						{
							$response = fgets($this->connection, 3);
							if(strlen($response) != 2)
								$error = $this->SetDataAccessError($receive_error);
							elseif(Ord($response[1]) != $method)
								$error = 'the SOCKS server requires an authentication method that is not yet supported';
							else
							{
								if($this->debug)
									$this->OutputDebug('Connecting to '.$host_server_type.' server IP '.$host_ip.' port '.$host_port.'...');
								$command = 1;
								$address_type = 1;
								if(!fputs($this->connection, chr($version).chr($command)."\x00".chr($address_type).pack('Nn', ip2long($host_ip), $host_port)))
									$error = $this->SetDataAccessError($send_error);
								else
								{
									$response = fgets($this->connection, 11);
									if(strlen($response) != 10)
										$error = $this->SetDataAccessError($receive_error);
									else
									{
										$socks_errors = array(
											"\x00"=>'',
											"\x01"=>'general SOCKS server failure',
											"\x02"=>'connection not allowed by ruleset',
											"\x03"=>'Network unreachable',
											"\x04"=>'Host unreachable',
											"\x05"=>'Connection refused',
											"\x06"=>'TTL expired',
											"\x07"=>'Command not supported',
											"\x08"=>'Address type not supported'
										);
										$error_code = $response[1];
										$error = (IsSet($socks_errors[$error_code]) ? $socks_errors[$error_code] : 'unknown');
										if(strlen($error))
											$error = 'SOCKS error: '.$error;
									}
								}
							}
						}
						break;
					default:
						$error = 'support for SOCKS protocol version '.$this->socks_version.' is not yet implemented';
						break;
				}
				if(strlen($error))
				{
					fclose($this->connection);
					return($error);
				}
			}
			if($this->debug)
				$this->OutputDebug("Connected to $host_name");
			if(strlen($this->proxy_host_name)
			&& !strcmp(strtolower($this->protocol), 'https'))
			{
				if(function_exists('stream_socket_enable_crypto')
				&& in_array('ssl', stream_get_transports()))
					$this->state = "ConnectedToProxy";
				else
				{
					$this->OutputDebug("It is not possible to start SSL after connecting to the proxy server. If the proxy refuses to forward the SSL request, you may need to upgrade to PHP 5.1 or later with OpenSSL support enabled.");
					$this->state="Connected";
				}
			}
			else
				$this->state="Connected";
			return("");
		}
	}

	Function Disconnect()
	{
		if($this->debug)
			$this->OutputDebug("Disconnected from ".$this->connected_host);
		if($this->use_curl)
		{
			curl_close($this->connection);
			$this->response="";
		}
		else
			fclose($this->connection);
		$this->state="Disconnected";
		return("");
	}

	/* Public methods */

	Function GetRequestArguments($url, &$arguments)
	{
		$this->error = '';
		$this->error_code = HTTP_CLIENT_ERROR_NO_ERROR;
		$arguments=array();
		$url = str_replace(' ', '%20', $url);
		$parameters=@parse_url($url);
		if(!$parameters)
			return($this->SetError("it was not specified a valid URL", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		if(!IsSet($parameters["scheme"]))
			return($this->SetError("it was not specified the protocol type argument", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		switch(strtolower($parameters["scheme"]))
		{
			case "http":
			case "https":
				$arguments["Protocol"]=$parameters["scheme"];
				break;
			default:
				return($parameters["scheme"]." connection scheme is not yet supported");
		}
		if(!IsSet($parameters["host"]))
			return($this->SetError("it was not specified the connection host argument", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		$arguments["HostName"]=$parameters["host"];
		$arguments["Headers"]=array("Host"=>$parameters["host"].(IsSet($parameters["port"]) ? ":".$parameters["port"] : ""));
		if(IsSet($parameters["user"]))
		{
			$arguments["AuthUser"]=UrlDecode($parameters["user"]);
			if(!IsSet($parameters["pass"]))
				$arguments["AuthPassword"]="";
		}
		if(IsSet($parameters["pass"]))
		{
			if(!IsSet($parameters["user"]))
				$arguments["AuthUser"]="";
			$arguments["AuthPassword"]=UrlDecode($parameters["pass"]);
		}
		if(IsSet($parameters["port"]))
		{
			if(strcmp($parameters["port"],strval(intval($parameters["port"]))))
				return($this->SetError("it was not specified a valid connection host argument", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			$arguments["HostPort"]=intval($parameters["port"]);
		}
		else
			$arguments["HostPort"]=0;
		$arguments["RequestURI"]=(IsSet($parameters["path"]) ? $parameters["path"] : "/").(IsSet($parameters["query"]) ? "?".$parameters["query"] : "");
		if(strlen($this->user_agent))
			$arguments["Headers"]["User-Agent"]=$this->user_agent;
		if(strlen($this->accept))
			$arguments["Headers"]["Accept"]=$this->accept;
		return("");
	}

	Function Open($arguments)
	{
		if(strlen($this->error))
			return($this->error);
		$error_code = HTTP_CLIENT_ERROR_UNSPECIFIED_ERROR;
		if(IsSet($arguments["HostName"]))
			$this->host_name=$arguments["HostName"];
		if(IsSet($arguments["HostPort"]))
			$this->host_port=$arguments["HostPort"];
		if(IsSet($arguments["ProxyHostName"]))
			$this->proxy_host_name=$arguments["ProxyHostName"];
		if(IsSet($arguments["ProxyHostPort"]))
			$this->proxy_host_port=$arguments["ProxyHostPort"];
		if(IsSet($arguments["SOCKSHostName"]))
			$this->socks_host_name=$arguments["SOCKSHostName"];
		if(IsSet($arguments["SOCKSHostPort"]))
			$this->socks_host_port=$arguments["SOCKSHostPort"];
		if(IsSet($arguments["SOCKSVersion"]))
			$this->socks_version=$arguments["SOCKSVersion"];
		if(IsSet($arguments["Protocol"]))
			$this->protocol=$arguments["Protocol"];
		switch(strtolower($this->protocol))
		{
			case "http":
				$default_port=80;
				break;
			case "https":
				$default_port=443;
				break;
			default:
				return($this->SetError("it was not specified a valid connection protocol", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		}
		if(strlen($this->proxy_host_name)==0)
		{
			if(strlen($this->host_name)==0)
				return($this->SetError("it was not specified a valid hostname", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			$host_name=$this->host_name;
			$host_port=($this->host_port ? $this->host_port : $default_port);
			$server_type = 'HTTP';
		}
		else
		{
			$host_name=$this->proxy_host_name;
			$host_port=$this->proxy_host_port;
			$server_type = 'HTTP proxy';
		}
		$ssl=(strtolower($this->protocol)=="https" && strlen($this->proxy_host_name)==0);
		if($ssl
		&& strlen($this->socks_host_name))
			return($this->SetError('establishing SSL connections via a SOCKS server is not yet supported', HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		$this->use_curl=($ssl && $this->prefer_curl && function_exists("curl_init"));
		switch($this->state)
		{
			case 'Connected':
				if(!strcmp($host_name, $this->connected_host)
				&& intval($host_port) == $this->connected_port
				&& intval($ssl) == $this->connected_ssl)
				{
					if($this->debug)
						$this->OutputDebug("Reusing connection to ".$this->connected_host);
					return('');
				}
				if(strlen($error = $this->Disconnect()))
					return($error);
			case "Disconnected":
				break;
			default:
				return("1 already connected");
		}
		if($this->debug)
			$this->OutputDebug("Connecting to ".$this->host_name);
		if($this->use_curl)
		{
			$error=(($this->connection=curl_init($this->protocol."://".$this->host_name.($host_port==$default_port ? "" : ":".strval($host_port))."/")) ? "" : "Could not initialize a CURL session");
			if(strlen($error)==0)
			{
				if(IsSet($arguments["SSLCertificateFile"]))
					curl_setopt($this->connection,CURLOPT_SSLCERT,$arguments["SSLCertificateFile"]);
				if(IsSet($arguments["SSLCertificatePassword"]))
					curl_setopt($this->connection,CURLOPT_SSLCERTPASSWD,$arguments["SSLCertificatePassword"]);
				if(IsSet($arguments["SSLKeyFile"]))
					curl_setopt($this->connection,CURLOPT_SSLKEY,$arguments["SSLKeyFile"]);
				if(IsSet($arguments["SSLKeyPassword"]))
					curl_setopt($this->connection,CURLOPT_SSLKEYPASSWD,$arguments["SSLKeyPassword"]);
			}
			$this->state="Connected";
		}
		else
		{
			$error="";
			if(strlen($this->proxy_host_name)
			&& (IsSet($arguments["SSLCertificateFile"])
			|| IsSet($arguments["SSLCertificateFile"])))
				$error="establishing SSL connections using certificates or private keys via non-SSL proxies is not supported";
			else
			{
				if($ssl)
				{
					if(IsSet($arguments["SSLCertificateFile"]))
						$error="establishing SSL connections using certificates is only supported when the cURL extension is enabled";
					elseif(IsSet($arguments["SSLKeyFile"]))
						$error="establishing SSL connections using a private key is only supported when the cURL extension is enabled";
					else
					{
						$version=explode(".",function_exists("phpversion") ? phpversion() : "3.0.7");
						$php_version=intval($version[0])*1000000+intval($version[1])*1000+intval($version[2]);
						if($php_version<4003000)
							$error="establishing SSL connections requires at least PHP version 4.3.0 or having the cURL extension enabled";
						elseif(!function_exists("extension_loaded")
						|| !extension_loaded("openssl"))
							$error="establishing SSL connections requires the OpenSSL extension enabled";
					}
				}
				if(strlen($error)==0)
				{
					$error=$this->Connect($host_name, $host_port, $ssl, $server_type);
					$error_code = $this->error_code;
				}
			}
		}
		if(strlen($error))
			return($this->SetError($error, $error_code));
		$this->session=md5(uniqid(""));
		$this->connected_host = $host_name;
		$this->connected_port = intval($host_port);
		$this->connected_ssl = intval($ssl);
		return("");
	}

	Function Close($force = 0)
	{
		if($this->state=="Disconnected")
			return("1 already disconnected");
		if(!$this->force_close
		&& $this->keep_alive
		&& !$force
		&& $this->state == 'ResponseReceived')
		{
			if($this->debug)
				$this->OutputDebug('Keeping the connection alive to '.$this->connected_host);
			$this->state = 'Connected';
			return('');
		}
		return($this->Disconnect());
	}

	Function PickCookies(&$cookies,$secure)
	{
		if(IsSet($this->cookies[$secure]))
		{
			$now=gmdate("Y-m-d H-i-s");
			for($domain=0,Reset($this->cookies[$secure]);$domain<count($this->cookies[$secure]);Next($this->cookies[$secure]),$domain++)
			{
				$domain_pattern=Key($this->cookies[$secure]);
				$match=strlen($this->request_host)-strlen($domain_pattern);
				if($match>=0
				&& !strcmp($domain_pattern,substr($this->request_host,$match))
				&& ($match==0
				|| $domain_pattern[0]=="."
				|| $this->request_host[$match-1]=="."))
				{
					for(Reset($this->cookies[$secure][$domain_pattern]),$path_part=0;$path_part<count($this->cookies[$secure][$domain_pattern]);Next($this->cookies[$secure][$domain_pattern]),$path_part++)
					{
						$path=Key($this->cookies[$secure][$domain_pattern]);
						if(strlen($this->request_uri)>=strlen($path)
						&& substr($this->request_uri,0,strlen($path))==$path)
						{
							for(Reset($this->cookies[$secure][$domain_pattern][$path]),$cookie=0;$cookie<count($this->cookies[$secure][$domain_pattern][$path]);Next($this->cookies[$secure][$domain_pattern][$path]),$cookie++)
							{
								$cookie_name=Key($this->cookies[$secure][$domain_pattern][$path]);
								$expires=$this->cookies[$secure][$domain_pattern][$path][$cookie_name]["expires"];
								if($expires==""
								|| strcmp($now,$expires)<0)
									$cookies[$cookie_name]=$this->cookies[$secure][$domain_pattern][$path][$cookie_name];
							}
						}
					}
				}
			}
		}
	}

	Function GetFileDefinition($file, &$definition)
	{
		$name="";
		if(IsSet($file["FileName"]))
			$name=basename($file["FileName"]);
		if(IsSet($file["Name"]))
			$name=$file["Name"];
		if(strlen($name)==0)
			return("it was not specified the file part name");
		if(IsSet($file["Content-Type"]))
		{
			$content_type=$file["Content-Type"];
			$type=$this->Tokenize(strtolower($content_type),"/");
			$sub_type=$this->Tokenize("");
			switch($type)
			{
				case "text":
				case "image":
				case "audio":
				case "video":
				case "application":
				case "message":
					break;
				case "automatic":
					switch($sub_type)
					{
						case "name":
							switch(GetType($dot=strrpos($name,"."))=="integer" ? strtolower(substr($name,$dot)) : "")
							{
								case ".xls":
									$content_type="application/excel";
									break;
								case ".hqx":
									$content_type="application/macbinhex40";
									break;
								case ".doc":
								case ".dot":
								case ".wrd":
									$content_type="application/msword";
									break;
								case ".pdf":
									$content_type="application/pdf";
									break;
								case ".pgp":
									$content_type="application/pgp";
									break;
								case ".ps":
								case ".eps":
								case ".ai":
									$content_type="application/postscript";
									break;
								case ".ppt":
									$content_type="application/powerpoint";
									break;
								case ".rtf":
									$content_type="application/rtf";
									break;
								case ".tgz":
								case ".gtar":
									$content_type="application/x-gtar";
									break;
								case ".gz":
									$content_type="application/x-gzip";
									break;
								case ".php":
								case ".php3":
									$content_type="application/x-httpd-php";
									break;
								case ".js":
									$content_type="application/x-javascript";
									break;
								case ".ppd":
								case ".psd":
									$content_type="application/x-photoshop";
									break;
								case ".swf":
								case ".swc":
								case ".rf":
									$content_type="application/x-shockwave-flash";
									break;
								case ".tar":
									$content_type="application/x-tar";
									break;
								case ".zip":
									$content_type="application/zip";
									break;
								case ".mid":
								case ".midi":
								case ".kar":
									$content_type="audio/midi";
									break;
								case ".mp2":
								case ".mp3":
								case ".mpga":
									$content_type="audio/mpeg";
									break;
								case ".ra":
									$content_type="audio/x-realaudio";
									break;
								case ".wav":
									$content_type="audio/wav";
									break;
								case ".bmp":
									$content_type="image/bitmap";
									break;
								case ".gif":
									$content_type="image/gif";
									break;
								case ".iff":
									$content_type="image/iff";
									break;
								case ".jb2":
									$content_type="image/jb2";
									break;
								case ".jpg":
								case ".jpe":
								case ".jpeg":
									$content_type="image/jpeg";
									break;
								case ".jpx":
									$content_type="image/jpx";
									break;
								case ".png":
									$content_type="image/png";
									break;
								case ".tif":
								case ".tiff":
									$content_type="image/tiff";
									break;
								case ".wbmp":
									$content_type="image/vnd.wap.wbmp";
									break;
								case ".xbm":
									$content_type="image/xbm";
									break;
								case ".css":
									$content_type="text/css";
									break;
								case ".txt":
									$content_type="text/plain";
									break;
								case ".htm":
								case ".html":
									$content_type="text/html";
									break;
								case ".xml":
									$content_type="text/xml";
									break;
								case ".mpg":
								case ".mpe":
								case ".mpeg":
									$content_type="video/mpeg";
									break;
								case ".qt":
								case ".mov":
									$content_type="video/quicktime";
									break;
								case ".avi":
									$content_type="video/x-ms-video";
									break;
								case ".eml":
									$content_type="message/rfc822";
									break;
								default:
									$content_type="application/octet-stream";
									break;
							}
							break;
						default:
							return($content_type." is not a supported automatic content type detection method");
					}
					break;
				default:
					return($content_type." is not a supported file content type");
			}
		}
		else
			$content_type="application/octet-stream";
		$definition=array(
			"Content-Type"=>$content_type,
			"NAME"=>$name
		);
		if(IsSet($file["FileName"]))
		{
			if(GetType($length=@filesize($file["FileName"]))!="integer")
			{
				$error="it was not possible to determine the length of the file ".$file["FileName"];
				if(IsSet($php_errormsg)
				&& strlen($php_errormsg))
					$error.=": ".$php_errormsg;
				if(!file_exists($file["FileName"]))
					$error="it was not possible to access the file ".$file["FileName"];
				return($error);
			}
			$definition["FILENAME"]=$file["FileName"];
			$definition["Content-Length"]=$length;
		}
		elseif(IsSet($file["Data"]))
			$definition["Content-Length"]=strlen($definition["DATA"]=$file["Data"]);
		else
			return("it was not specified a valid file name");
		return("");
	}

	Function SendRequest($arguments)
	{
		if(strlen($this->error))
			return($this->error);
		if(IsSet($arguments["ProxyUser"]))
			$this->proxy_request_user=$arguments["ProxyUser"];
		elseif(IsSet($this->proxy_user))
			$this->proxy_request_user=$this->proxy_user;
		if(IsSet($arguments["ProxyPassword"]))
			$this->proxy_request_password=$arguments["ProxyPassword"];
		elseif(IsSet($this->proxy_password))
			$this->proxy_request_password=$this->proxy_password;
		if(IsSet($arguments["ProxyRealm"]))
			$this->proxy_request_realm=$arguments["ProxyRealm"];
		elseif(IsSet($this->proxy_realm))
			$this->proxy_request_realm=$this->proxy_realm;
		if(IsSet($arguments["ProxyWorkstation"]))
			$this->proxy_request_workstation=$arguments["ProxyWorkstation"];
		elseif(IsSet($this->proxy_workstation))
			$this->proxy_request_workstation=$this->proxy_workstation;
		switch($this->state)
		{
			case "Disconnected":
				return($this->SetError("connection was not yet established", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "Connected":
				$connect = 0;
				break;
			default:
				return($this->SetError("can not send request in the current connection state", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		}
		if(IsSet($arguments["RequestMethod"]))
			$this->request_method=$arguments["RequestMethod"];
		if(IsSet($arguments["User-Agent"]))
			$this->user_agent=$arguments["User-Agent"];
		if(!IsSet($arguments["Headers"]["User-Agent"])
		&& strlen($this->user_agent))
			$arguments["Headers"]["User-Agent"]=$this->user_agent;
		if(IsSet($arguments["KeepAlive"]))
			$this->keep_alive=intval($arguments["KeepAlive"]);
		if(!IsSet($arguments["Headers"]["Connection"])
		&& $this->keep_alive)
			$arguments["Headers"]["Connection"]='Keep-Alive';
		if(IsSet($arguments["Accept"]))
			$this->user_agent=$arguments["Accept"];
		if(!IsSet($arguments["Headers"]["Accept"])
		&& strlen($this->accept))
			$arguments["Headers"]["Accept"]=$this->accept;
		if(strlen($this->request_method)==0)
			return($this->SetError("it was not specified a valid request method", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		if(IsSet($arguments["RequestURI"]))
			$this->request_uri=$arguments["RequestURI"];
		if(strlen($this->request_uri)==0
		|| substr($this->request_uri,0,1)!="/")
			return($this->SetError("it was not specified a valid request URI", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		$this->request_arguments=$arguments;
		$this->request_headers=(IsSet($arguments["Headers"]) ? $arguments["Headers"] : array());
		$body_length=0;
		$this->request_body="";
		$get_body=1;
		if($this->request_method=="POST"
		|| $this->request_method=="PUT")
		{
			if(IsSet($arguments['StreamRequest']))
			{
				$get_body = 0;
				$this->request_headers["Transfer-Encoding"]="chunked";
			}
			elseif(IsSet($arguments["PostFiles"])
			|| ($this->force_multipart_form_post
			&& IsSet($arguments["PostValues"])))
			{
				$boundary="--".md5(uniqid(time()));
				$this->request_headers["Content-Type"]="multipart/form-data; boundary=".$boundary.(IsSet($arguments["CharSet"]) ? "; charset=".$arguments["CharSet"] : "");
				$post_parts=array();
				if(IsSet($arguments["PostValues"]))
				{
					$values=$arguments["PostValues"];
					if(GetType($values)!="array")
						return($this->SetError("it was not specified a valid POST method values array", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
					for(Reset($values),$value=0;$value<count($values);Next($values),$value++)
					{
						$input=Key($values);
						$headers="--".$boundary."\r\nContent-Disposition: form-data; name=\"".$input."\"\r\n\r\n";
						$data=$values[$input];
						$post_parts[]=array("HEADERS"=>$headers,"DATA"=>$data);
						$body_length+=strlen($headers)+strlen($data)+strlen("\r\n");
					}
				}
				$body_length+=strlen("--".$boundary."--\r\n");
				$files=(IsSet($arguments["PostFiles"]) ? $arguments["PostFiles"] : array());
				Reset($files);
				$end=(GetType($input=Key($files))!="string");
				for(;!$end;)
				{
					if(strlen($error=$this->GetFileDefinition($files[$input],$definition)))
						return("3 ".$error);
					$headers="--".$boundary."\r\nContent-Disposition: form-data; name=\"".$input."\"; filename=\"".$definition["NAME"]."\"\r\nContent-Type: ".$definition["Content-Type"]."\r\n\r\n";
					$part=count($post_parts);
					$post_parts[$part]=array("HEADERS"=>$headers);
					if(IsSet($definition["FILENAME"]))
					{
						$post_parts[$part]["FILENAME"]=$definition["FILENAME"];
						$data="";
					}
					else
						$data=$definition["DATA"];
					$post_parts[$part]["DATA"]=$data;
					$body_length+=strlen($headers)+$definition["Content-Length"]+strlen("\r\n");
					Next($files);
					$end=(GetType($input=Key($files))!="string");
				}
				$get_body=0;
			}
			elseif(IsSet($arguments["PostValues"]))
			{
				$values=$arguments["PostValues"];
				if(GetType($values)!="array")
					return($this->SetError("it was not specified a valid POST method values array", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
				for(Reset($values),$value=0;$value<count($values);Next($values),$value++)
				{
					$k=Key($values);
					if(GetType($values[$k])=="array")
					{
						for($v = 0; $v < count($values[$k]); $v++)
						{
							if($value+$v>0)
								$this->request_body.="&";
							$this->request_body.=UrlEncode($k)."=".UrlEncode($values[$k][$v]);
						}
					}
					else
					{
						if($value>0)
							$this->request_body.="&";
						$this->request_body.=UrlEncode($k)."=".UrlEncode($values[$k]);
					}
				}
				$this->request_headers["Content-Type"]="application/x-www-form-urlencoded".(IsSet($arguments["CharSet"]) ? "; charset=".$arguments["CharSet"] : "");
				$get_body=0;
			}
		}
		if($get_body
		&& (IsSet($arguments["Body"])
		|| IsSet($arguments["BodyStream"])))
		{
			if(IsSet($arguments["Body"]))
				$this->request_body=$arguments["Body"];
			else
			{
				$stream=$arguments["BodyStream"];
				$this->request_body="";
				for($part=0; $part<count($stream); $part++)
				{
					if(IsSet($stream[$part]["Data"]))
						$this->request_body.=$stream[$part]["Data"];
					elseif(IsSet($stream[$part]["File"]))
					{
						if(!($file=@fopen($stream[$part]["File"],"rb")))
							return($this->SetPHPError("could not open upload file ".$stream[$part]["File"], $php_errormsg, HTTP_CLIENT_ERROR_CANNOT_ACCESS_LOCAL_FILE));
						while(!feof($file))
						{
							if(GetType($block=@fread($file,$this->file_buffer_length))!="string")
							{
								$error=$this->SetPHPError("could not read body stream file ".$stream[$part]["File"], $php_errormsg, HTTP_CLIENT_ERROR_CANNOT_ACCESS_LOCAL_FILE);
								fclose($file);
								return($error);
							}
							$this->request_body.=$block;
						}
						fclose($file);
					}
					else
						return("5 it was not specified a valid file or data body stream element at position ".$part);
				}
			}
			if(!IsSet($this->request_headers["Content-Type"]))
				$this->request_headers["Content-Type"]="application/octet-stream".(IsSet($arguments["CharSet"]) ? "; charset=".$arguments["CharSet"] : "");
		}
		if(IsSet($arguments["AuthUser"]))
			$this->request_user=$arguments["AuthUser"];
		elseif(IsSet($this->user))
			$this->request_user=$this->user;
		if(IsSet($arguments["AuthPassword"]))
			$this->request_password=$arguments["AuthPassword"];
		elseif(IsSet($this->password))
			$this->request_password=$this->password;
		if(IsSet($arguments["AuthRealm"]))
			$this->request_realm=$arguments["AuthRealm"];
		elseif(IsSet($this->realm))
			$this->request_realm=$this->realm;
		if(IsSet($arguments["AuthWorkstation"]))
			$this->request_workstation=$arguments["AuthWorkstation"];
		elseif(IsSet($this->workstation))
			$this->request_workstation=$this->workstation;
		if(strlen($this->proxy_host_name)==0
		|| $connect)
			$request_uri=$this->request_uri;
		else
		{
			switch(strtolower($this->protocol))
			{
				case "http":
					$default_port=80;
					break;
				case "https":
					$default_port=443;
					break;
			}
			$request_uri=strtolower($this->protocol)."://".$this->host_name.(($this->host_port==0 || $this->host_port==$default_port) ? "" : ":".$this->host_port).$this->request_uri;
		}
		if($this->use_curl)
		{
			$version=(GetType($v=curl_version())=="array" ? (IsSet($v["version"]) ? $v["version"] : "0.0.0") : (preg_match("/^libcurl\\/([0-9]+\\.[0-9]+\\.[0-9]+)/",$v,$m) ? $m[1] : "0.0.0"));
			$curl_version=100000*intval($this->Tokenize($version,"."))+1000*intval($this->Tokenize("."))+intval($this->Tokenize(""));
			$protocol_version=($curl_version<713002 ? "1.0" : $this->protocol_version);
		}
		else
			$protocol_version=$this->protocol_version;
		$this->request=$this->request_method." ".$request_uri." HTTP/".$protocol_version;
		if($body_length
		|| ($body_length=strlen($this->request_body)))
			$this->request_headers["Content-Length"]=$body_length;
		for($headers=array(),$host_set=0,Reset($this->request_headers),$header=0;$header<count($this->request_headers);Next($this->request_headers),$header++)
		{
			$header_name=Key($this->request_headers);
			$header_value=$this->request_headers[$header_name];
			if(GetType($header_value)=="array")
			{
				for(Reset($header_value),$value=0;$value<count($header_value);Next($header_value),$value++)
					$headers[]=$header_name.": ".$header_value[Key($header_value)];
			}
			else
				$headers[]=$header_name.": ".$header_value;
			if(strtolower(Key($this->request_headers))=="host")
			{
				$this->request_host=strtolower($header_value);
				$host_set=1;
			}
		}
		if(!$host_set)
		{
			$headers[]="Host: ".$this->host_name;
			$this->request_host=strtolower($this->host_name);
		}
		if(count($this->cookies))
		{
			$cookies=array();
			$this->PickCookies($cookies,0);
			if(strtolower($this->protocol)=="https")
				$this->PickCookies($cookies,1);
			if(count($cookies))
			{
				$h=count($headers);
				$headers[$h]="Cookie:";
				for(Reset($cookies),$cookie=0;$cookie<count($cookies);Next($cookies),$cookie++)
				{
					$cookie_name=Key($cookies);
					$headers[$h].=" ".$cookie_name."=".$cookies[$cookie_name]["value"].";";
				}
			}
		}
		$next_state = "RequestSent";
		if($this->use_curl)
		{
			if(IsSet($arguments['StreamRequest']))
				return($this->SetError("Streaming request data is not supported when using Curl", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			if($body_length
			&& strlen($this->request_body)==0)
			{
				for($request_body="",$success=1,$part=0;$part<count($post_parts);$part++)
				{
					$request_body.=$post_parts[$part]["HEADERS"].$post_parts[$part]["DATA"];
					if(IsSet($post_parts[$part]["FILENAME"]))
					{
						if(!($file=@fopen($post_parts[$part]["FILENAME"],"rb")))
						{
							$this->SetPHPError("could not open upload file ".$post_parts[$part]["FILENAME"], $php_errormsg, HTTP_CLIENT_ERROR_CANNOT_ACCESS_LOCAL_FILE);
							$success=0;
							break;
						}
						while(!feof($file))
						{
							if(GetType($block=@fread($file,$this->file_buffer_length))!="string")
							{
								$this->SetPHPError("could not read upload file", $php_errormsg, HTTP_CLIENT_ERROR_CANNOT_ACCESS_LOCAL_FILE);
								$success=0;
								break;
							}
							$request_body.=$block;
						}
						fclose($file);
						if(!$success)
							break;
					}
					$request_body.="\r\n";
				}
				$request_body.="--".$boundary."--\r\n";
			}
			else
				$request_body=$this->request_body;
			curl_setopt($this->connection,CURLOPT_HEADER,1);
			curl_setopt($this->connection,CURLOPT_RETURNTRANSFER,1);
			if($this->timeout)
				curl_setopt($this->connection,CURLOPT_TIMEOUT,$this->timeout);
			curl_setopt($this->connection,CURLOPT_SSL_VERIFYPEER,0);
			curl_setopt($this->connection,CURLOPT_SSL_VERIFYHOST,0);
			$request=$this->request."\r\n".implode("\r\n",$headers)."\r\n\r\n".$request_body;
			curl_setopt($this->connection,CURLOPT_CUSTOMREQUEST,$request);
			if($this->debug)
				$this->OutputDebug("C ".$request);
			if(!($success=(strlen($this->response=curl_exec($this->connection))!=0)))
			{
				$error=curl_error($this->connection);
				$this->SetError("Could not execute the request".(strlen($error) ? ": ".$error : ""), HTTP_CLIENT_ERROR_PROTOCOL_FAILURE);
			}
		}
		else
		{
			if(($success=$this->PutLine($this->request)))
			{
				for($header=0;$header<count($headers);$header++)
				{
					if(!$success=$this->PutLine($headers[$header]))
						break;
				}
				if($success
				&& ($success=$this->PutLine("")))
				{
					if(IsSet($arguments['StreamRequest']))
						$next_state = "SendingRequestBody";
					elseif($body_length)
					{
						if(strlen($this->request_body))
							$success=$this->PutData($this->request_body);
						else
						{
							for($part=0;$part<count($post_parts);$part++)
							{
								if(!($success=$this->PutData($post_parts[$part]["HEADERS"]))
								|| !($success=$this->PutData($post_parts[$part]["DATA"])))
									break;
								if(IsSet($post_parts[$part]["FILENAME"]))
								{
									if(!($file=@fopen($post_parts[$part]["FILENAME"],"rb")))
									{
										$this->SetPHPError("could not open upload file ".$post_parts[$part]["FILENAME"], $php_errormsg, HTTP_CLIENT_ERROR_CANNOT_ACCESS_LOCAL_FILE);
										$success=0;
										break;
									}
									while(!feof($file))
									{
										if(GetType($block=@fread($file,$this->file_buffer_length))!="string")
										{
											$this->SetPHPError("could not read upload file", $php_errormsg, HTTP_CLIENT_ERROR_CANNOT_ACCESS_LOCAL_FILE);
											$success=0;
											break;
										}
										if(!($success=$this->PutData($block)))
											break;
									}
									fclose($file);
									if(!$success)
										break;
								}
								if(!($success=$this->PutLine("")))
									break;
							}
							if($success)
								$success=$this->PutLine("--".$boundary."--");
						}
						if($success)
							$sucess=$this->FlushData();
					}
				}
			}
		}
		if(!$success)
			return($this->SetError("could not send the HTTP request: ".$this->error, $this->error_code));
		$this->state=$next_state;
		return("");
	}

	Function SetCookie($name, $value, $expires="" , $path="/" , $domain="" , $secure=0, $verbatim=0)
	{
		if(strlen($this->error))
			return($this->error);
		if(strlen($name)==0)
			return($this->SetError("it was not specified a valid cookie name", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		if(strlen($path)==0
		|| strcmp($path[0],"/"))
			return($this->SetError($path." is not a valid path for setting cookie ".$name, HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		if($domain==""
		|| !strpos($domain,".",$domain[0]=="." ? 1 : 0))
			return($this->SetError($domain." is not a valid domain for setting cookie ".$name, HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		$domain=strtolower($domain);
		if(!strcmp($domain[0],"."))
			$domain=substr($domain,1);
		if(!$verbatim)
		{
			$name=$this->CookieEncode($name,1);
			$value=$this->CookieEncode($value,0);
		}
		$secure=intval($secure);
		$this->cookies[$secure][$domain][$path][$name]=array(
			"name"=>$name,
			"value"=>$value,
			"domain"=>$domain,
			"path"=>$path,
			"expires"=>$expires,
			"secure"=>$secure
		);
		return("");
	}

	Function SendRequestBody($data, $end_of_data)
	{
		if(strlen($this->error))
			return($this->error);
		switch($this->state)
		{
			case "Disconnected":
				return($this->SetError("connection was not yet established", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "Connected":
			case "ConnectedToProxy":
				return($this->SetError("request was not sent", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "SendingRequestBody":
				break;
			case "RequestSent":
				return($this->SetError("request body was already sent", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			default:
				return($this->SetError("can not send the request body in the current connection state", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		}
		$length = strlen($data);
		if($length)
		{
			$size = dechex($length)."\r\n";
			if(!$this->PutData($size)
			|| !$this->PutData($data))
				return($this->error);
		}
		if($end_of_data)
		{
			$size = "0\r\n";
			if(!$this->PutData($size))
				return($this->error);
			$this->state = "RequestSent";
		}
		return("");
	}

	Function ReadReplyHeadersResponse(&$headers)
	{
		$headers=array();
		if(strlen($this->error))
			return($this->error);
		switch($this->state)
		{
			case "Disconnected":
				return($this->SetError("connection was not yet established", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "Connected":
				return($this->SetError("request was not sent", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "ConnectedToProxy":
				return($this->SetError("connection from the remote server from the proxy was not yet established", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "SendingRequestBody":
				return($this->SetError("request body data was not completely sent", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "ConnectSent":
				$connect = 1;
				break;
			case "RequestSent":
				$connect = 0;
				break;
			default:
				return($this->SetError("can not get request headers in the current connection state", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		}
		$this->content_length=$this->read_length=$this->read_response=$this->remaining_chunk=0;
		$this->content_length_set=$this->chunked=$this->last_chunk_read=$chunked=0;
		$this->force_close = $this->connection_close=0;
		for($this->response_status="";;)
		{
			$line=$this->GetLine();
			if(GetType($line)!="string")
				return($this->SetError("could not read request reply: ".$this->error, $this->error_code));
			if(strlen($this->response_status)==0)
			{
				if(!preg_match($match="/^http\\/[0-9]+\\.[0-9]+[ \t]+([0-9]+)[ \t]*(.*)\$/i",$line,$matches))
					return($this->SetError("it was received an unexpected HTTP response status", HTTP_CLIENT_ERROR_PROTOCOL_FAILURE));
				$this->response_status=$matches[1];
				$this->response_message=$matches[2];
			}
			if($line=="")
			{
				if(strlen($this->response_status)==0)
					return($this->SetError("it was not received HTTP response status", HTTP_CLIENT_ERROR_PROTOCOL_FAILURE));
				$this->state=($connect ? "GotConnectHeaders" : "GotReplyHeaders");
				break;
			}
			$header_name=strtolower($this->Tokenize($line,":"));
			$header_value=Trim(Chop($this->Tokenize("\r\n")));
			if(IsSet($headers[$header_name]))
			{
				if(GetType($headers[$header_name])=="string")
					$headers[$header_name]=array($headers[$header_name]);
				$headers[$header_name][]=$header_value;
			}
			else
				$headers[$header_name]=$header_value;
			if(!$connect)
			{
				switch($header_name)
				{
					case "content-length":
						$this->content_length=intval($headers[$header_name]);
						$this->content_length_set=1;
						break;
					case "transfer-encoding":
						$encoding=$this->Tokenize($header_value,"; \t");
						if(!$this->use_curl
						&& !strcmp($encoding,"chunked"))
							$chunked=1;
						break;
					case "set-cookie":
						if($this->support_cookies)
						{
							if(GetType($headers[$header_name])=="array")
								$cookie_headers=$headers[$header_name];
							else
								$cookie_headers=array($headers[$header_name]);
							for($cookie=0;$cookie<count($cookie_headers);$cookie++)
							{
								$cookie_name=trim($this->Tokenize($cookie_headers[$cookie],"="));
								$cookie_value=$this->Tokenize(";");
								$domain=$this->request_host;
								$path="/";
								$expires="";
								$secure=0;
								while(($name = strtolower(trim(UrlDecode($this->Tokenize("=")))))!="")
								{
									$value=UrlDecode($this->Tokenize(";"));
									switch($name)
									{
										case "domain":
											$domain=$value;
											break;
										case "path":
											$path=$value;
											break;
										case "expires":
											if(preg_match("/^((Mon|Monday|Tue|Tuesday|Wed|Wednesday|Thu|Thursday|Fri|Friday|Sat|Saturday|Sun|Sunday), )?([0-9]{2})\\-(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\\-([0-9]{2,4}) ([0-9]{2})\\:([0-9]{2})\\:([0-9]{2}) GMT\$/",$value,$matches))
											{
												$year=intval($matches[5]);
												if($year<1900)
													$year+=($year<70 ? 2000 : 1900);
												$expires="$year-".$this->months[$matches[4]]."-".$matches[3]." ".$matches[6].":".$matches[7].":".$matches[8];
											}
											break;
										case "secure":
											$secure=1;
											break;
									}
								}
								if(strlen($this->SetCookie($cookie_name, $cookie_value, $expires, $path , $domain, $secure, 1)))
									$this->error="";
							}
						}
						break;
					case "connection":
						$this->force_close = $this->connection_close=!strcmp(strtolower($header_value),"close");
						break;
				}
			}
		}
		$this->chunked=$chunked;
		if($this->content_length_set)
			$this->connection_close=0;
		return("");
	}

	Function Redirect(&$headers)
	{
		if($this->follow_redirect)
		{
			if(!IsSet($headers["location"])
			|| (GetType($headers["location"])!="array"
			&& strlen($location=$headers["location"])==0)
			|| (GetType($headers["location"])=="array"
			&& strlen($location=$headers["location"][0])==0))
				return($this->SetError("it was received a redirect without location URL", HTTP_CLIENT_ERROR_PROTOCOL_FAILURE));
			if(strcmp($location[0],"/"))
			{
				if(!($location_arguments=@parse_url($location)))
					return($this->SetError("the server did not return a valid redirection location URL", HTTP_CLIENT_ERROR_PROTOCOL_FAILURE));
				if(!IsSet($location_arguments["scheme"]))
					$location=((GetType($end=strrpos($this->request_uri,"/"))=="integer" && $end>1) ? substr($this->request_uri,0,$end) : "")."/".$location;
			}
			if(!strcmp($location[0],"/"))
				$location=$this->protocol."://".$this->host_name.($this->host_port ? ":".$this->host_port : "").$location;
			$error=$this->GetRequestArguments($location,$arguments);
			if(strlen($error))
				return($this->SetError("could not process redirect url: ".$error, HTTP_CLIENT_ERROR_PROTOCOL_FAILURE));
			$arguments["RequestMethod"]="GET";
			if(strlen($error=$this->Close())==0
			&& strlen($error=$this->Open($arguments))==0
			&& strlen($error=$this->SendRequest($arguments))==0)
			{
				$this->redirection_level++;
				if($this->redirection_level>$this->redirection_limit)
				{
					$error="it was exceeded the limit of request redirections";
					$this->error_code = HTTP_CLIENT_ERROR_PROTOCOL_FAILURE;
				}
				else
					$error=$this->ReadReplyHeaders($headers);
				$this->redirection_level--;
			}
			if(strlen($error))
				return($this->SetError($error, $this->error_code));
		}
		return("");
	}

	Function ReadReplyHeaders(&$headers)
	{
		if(strlen($error=$this->ReadReplyHeadersResponse($headers)))
			return($error);
		$proxy_authorization="";
		while(!strcmp($this->response_status, "100"))
		{
			$this->state="RequestSent";
			if(strlen($error=$this->ReadReplyHeadersResponse($headers)))
				return($error);
		}
		switch($this->response_status)
		{
			case "301":
			case "302":
			case "303":
			case "307":
				if(strlen($error=$this->Redirect($headers)))
					return($error);
				break;
		}
		return("");
	}

	Function ReadReplyBody(&$body,$length)
	{
		$body="";
		if(strlen($this->error))
			return($this->error);
		switch($this->state)
		{
			case "Disconnected":
				return($this->SetError("connection was not yet established", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "Connected":
			case "ConnectedToProxy":
				return($this->SetError("request was not sent", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			case "RequestSent":
				if(($error=$this->ReadReplyHeaders($headers))!="")
					return($error);
				break;
			case "GotReplyHeaders":
				break;
			case 'ResponseReceived':
				$body = '';
				return('');
			default:
				return($this->SetError("can not get request headers in the current connection state", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
		}
		if($this->content_length_set)
			$length=min($this->content_length-$this->read_length,$length);
		$body = '';
		if($length>0)
		{
			if(!$this->EndOfInput()
			&& ($body=$this->ReadBytes($length))=="")
			{
				if(strlen($this->error))
					return($this->SetError("could not get the request reply body: ".$this->error, $this->error_code));
			}
			$this->read_length+=strlen($body);
			if($this->EndOfInput())
				$this->state = 'ResponseReceived';
		}
		return("");
	}

	Function ReadWholeReplyBody(&$body)
	{
		$body = '';
		for(;;)
		{
			if(strlen($error = $this->ReadReplyBody($block, $this->file_buffer_length)))
				return($error);
			if(strlen($block) == 0)
				return('');
			$body .= $block;
		}
	}

	Function SaveCookies(&$cookies, $domain='', $secure_only=0, $persistent_only=0)
	{
		$now=gmdate("Y-m-d H-i-s");
		$cookies=array();
		for($secure_cookies=0,Reset($this->cookies);$secure_cookies<count($this->cookies);Next($this->cookies),$secure_cookies++)
		{
			$secure=Key($this->cookies);
			if(!$secure_only
			|| $secure)
			{
				for($cookie_domain=0,Reset($this->cookies[$secure]);$cookie_domain<count($this->cookies[$secure]);Next($this->cookies[$secure]),$cookie_domain++)
				{
					$domain_pattern=Key($this->cookies[$secure]);
					$match=strlen($domain)-strlen($domain_pattern);
					if(strlen($domain)==0
					|| ($match>=0
					&& !strcmp($domain_pattern,substr($domain,$match))
					&& ($match==0
					|| $domain_pattern[0]=="."
					|| $domain[$match-1]==".")))
					{
						for(Reset($this->cookies[$secure][$domain_pattern]),$path_part=0;$path_part<count($this->cookies[$secure][$domain_pattern]);Next($this->cookies[$secure][$domain_pattern]),$path_part++)
						{
							$path=Key($this->cookies[$secure][$domain_pattern]);
							for(Reset($this->cookies[$secure][$domain_pattern][$path]),$cookie=0;$cookie<count($this->cookies[$secure][$domain_pattern][$path]);Next($this->cookies[$secure][$domain_pattern][$path]),$cookie++)
							{
								$cookie_name=Key($this->cookies[$secure][$domain_pattern][$path]);
								$expires=$this->cookies[$secure][$domain_pattern][$path][$cookie_name]["expires"];
								if((!$persistent_only
								&& strlen($expires)==0)
								|| (strlen($expires)
								&& strcmp($now,$expires)<0))
									$cookies[$secure][$domain_pattern][$path][$cookie_name]=$this->cookies[$secure][$domain_pattern][$path][$cookie_name];
							}
						}
					}
				}
			}
		}
	}

	Function SavePersistentCookies(&$cookies, $domain='', $secure_only=0)
	{
		$this->SaveCookies($cookies, $domain, $secure_only, 1);
	}

	Function GetPersistentCookies(&$cookies, $domain='', $secure_only=0)
	{
		$this->SavePersistentCookies($cookies, $domain, $secure_only);
	}

	Function RestoreCookies($cookies, $clear=1)
	{
		$new_cookies=($clear ? array() : $this->cookies);
		for($secure_cookies=0, Reset($cookies); $secure_cookies<count($cookies); Next($cookies), $secure_cookies++)
		{
			$secure=Key($cookies);
			if(GetType($secure)!="integer")
				return($this->SetError("invalid cookie secure value type (".serialize($secure).")", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
			for($cookie_domain=0,Reset($cookies[$secure]);$cookie_domain<count($cookies[$secure]);Next($cookies[$secure]),$cookie_domain++)
			{
				$domain_pattern=Key($cookies[$secure]);
				if(GetType($domain_pattern)!="string")
					return($this->SetError("invalid cookie domain value type (".serialize($domain_pattern).")", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
				for(Reset($cookies[$secure][$domain_pattern]),$path_part=0;$path_part<count($cookies[$secure][$domain_pattern]);Next($cookies[$secure][$domain_pattern]),$path_part++)
				{
					$path=Key($cookies[$secure][$domain_pattern]);
					if(GetType($path)!="string"
					|| strcmp(substr($path, 0, 1), "/"))
						return($this->SetError("invalid cookie path value type (".serialize($path).")", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
					for(Reset($cookies[$secure][$domain_pattern][$path]),$cookie=0;$cookie<count($cookies[$secure][$domain_pattern][$path]);Next($cookies[$secure][$domain_pattern][$path]),$cookie++)
					{
						$cookie_name=Key($cookies[$secure][$domain_pattern][$path]);
						$expires=$cookies[$secure][$domain_pattern][$path][$cookie_name]["expires"];
						$value=$cookies[$secure][$domain_pattern][$path][$cookie_name]["value"];
						if(GetType($expires)!="string"
						|| (strlen($expires)
						&& !preg_match("/^[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}\$/", $expires)))
							return($this->SetError("invalid cookie expiry value type (".serialize($expires).")", HTTP_CLIENT_ERROR_INVALID_PARAMETERS));
						$new_cookies[$secure][$domain_pattern][$path][$cookie_name]=array(
							"name"=>$cookie_name,
							"value"=>$value,
							"domain"=>$domain_pattern,
							"path"=>$path,
							"expires"=>$expires,
							"secure"=>$secure
						);
					}
				}
			}
		}
		$this->cookies=$new_cookies;
		return("");
	}
};

?>