class.ilProxySettings.php

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<?php
/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once './Services/Http/exceptions/class.ilProxyException.php'; 

class ilProxySettings
{
        const CONNECTION_CHECK_TIMEOUT = 10;

        protected static $_instance = null;
        
        protected $host = '';
        
        protected $post = '';
        
        protected $isActive = false;
        
        protected function __construct()
        {
                $this->read();
        }
        
        private function __clone()
        {               
        }
        
        public static function _getInstance()
        {
                if(null === self::$_instance)
                {
                        self::$_instance = new self();
                }
                
                return self::$_instance;
        }
        
        protected function read()
        {
                global $ilSetting;
                
                $this->setHost($ilSetting->get('proxy_host'));
                $this->setPort($ilSetting->get('proxy_port'));
                $this->isActive((bool)$ilSetting->get('proxy_status')); 
        }
        
        public function isActive($status = null)
        {
                if(null === $status)
                {
                        return (bool)$this->isActive;
                }
                
                $this->isActive = (bool)$status;
                
                return $this;
        }
        
        public function setHost($host)
        {
                $this->host = $host;
                
                return $this;
        }
        
        public function getHost()
        {
                return $this->host;
        }
        
        public function setPort($port)
        {
                $this->port = $port;

                return $this;
        }
        
        public function getPort()
        {
                return $this->port;     
        }
        
        public function save()
        {
                global $ilSetting;
                
                $ilSetting->set('proxy_host', $this->getHost());
                $ilSetting->set('proxy_port', $this->getPort());
                $ilSetting->set('proxy_status', (int)$this->isActive());
                
                return $this;
        }
        
        public function checkConnection()
        {
                global $DIC;

                $errno  = null;
                $errstr = null;

                set_error_handler(function ($severity, $message, $file, $line)
                {
                        throw new ErrorException($message, $severity, $severity, $file, $line);
                });

                try
                {
                        $host = $this->getHost();
                        if(strspn($host, '.0123456789') != strlen($host) && strstr($host, '/') === false)
                        {
                                $host = gethostbyname($host);
                        }
                        $port =   $this->getPort() % 65536;

                        if(!fsockopen($host, $port, $errno, $errstr, self::CONNECTION_CHECK_TIMEOUT))
                        {
                                restore_error_handler();
                                throw new ilProxyException(strlen($errstr) ? $errstr : $DIC->language()->txt('proxy_not_connectable'));
                        }
                        restore_error_handler();
                }
                catch(Exception $e)
                {
                        restore_error_handler();
                        throw new ilProxyException(strlen($errstr) ? $errstr : $DIC->language()->txt('proxy_not_connectable'));
                }

                return $this;
        }
}
?>