<?php

/*
+--------------------------------------------------------------------------
|   Invision Power Board 2.1.7
|   =============================================
|   by Matthew Mecham
|   (c) 2001 - 2005 Invision Power Services, Inc.
|   http://www.invisionpower.com
|   =============================================
|   Web: http://www.invisionboard.com
|        http://www.ibresource.ru/products/invisionpowerboard/
|   Time: Tuesday 18th of July 2006 05:56:00 PM
|   Release: 52f408a29988b02f45b5e6f4ba5af0ae
|   Licence Info: http://www.invisionboard.com/?license
|                 http://www.ibresource.ru/license
+---------------------------------------------------------------------------
|   INVISION POWER BOARD IS NOT FREE / OPEN SOURCE!
+---------------------------------------------------------------------------
|   INVISION POWER BOARD НЕ ЯВЛЯЕТСЯ БЕСПЛАТНЫМ ПРОГРАММНЫМ ОБЕСПЕЧЕНИЕМ!
|   Права на ПО принадлежат Invision Power Services
|   Права на перевод IBResource (http://www.ibresource.ru)
+--------------------------------------------------------------------------
|
|   > File Management Functions
|   > Script written by Matt Mecham
|   > Date started: Tuesday 22nd February 2005 (16:55) I have cold feet
|
+---------------------------------------------------------------------------
*/

/**
* Class File Management
*
* Wrapper for getting file contents
*
* @package	IPS_KERNEL
* @author   Matt Mecham
* @version	2.1
*/

if ( ! defined( 'IPS_CLASSES_PATH' ) )
{
	/**
	* Define classes path
	*/
	define( 'IPS_CLASSES_PATH', dirname(__FILE__) );
}

/**
* Class File Management
*
* Wrapper for getting file contents
*
* @package	IPS_KERNEL
* @author   Matt Mecham
* @version	2.1
*/
class class_file_management
{
	/**
	* Use sockets flag
	*
	* @var integer
	*/
	var $use_sockets = 0;
	
	/**
	* Error array
	*
	* @var array
	*/
	var $errors      = array();
	
	/**#@+
	* Set Authentication
	*
	* @var strings 
	*/
	var $auth_req       = 0;
	var $auth_user;
	var $auth_pass;
	/**#@-*/	
	
	/*-------------------------------------------------------------------------*/
	// Constructor
	/*-------------------------------------------------------------------------*/

	function class_file_management()
	{

	}
	
	/*-------------------------------------------------------------------------*/
	// Get file contents (accepts URL or path)
	// file_get_contents() has caching issues
	/*-------------------------------------------------------------------------*/
	
	/**
	* Get file contents (accepts URL or path)
	*
	* file_get_contents() has caching issues
	* @return	string	File data
	*/
	function get_file_contents( $file_location )
	{
		//-------------------------------
		// INIT
		//-------------------------------
		
		$contents      = "";
		$file_location = str_replace( '&amp;', '&', $file_location );
		
		//-------------------------------
		// Hello
		//-------------------------------
		
		if ( ! $file_location )
		{
			return FALSE;
		}
		
		if ( ! stristr( $file_location, 'http://' ) )
		{
			//-------------------------------
			// It's a path!
			//-------------------------------
			
			if ( ! file_exists( $file_location ) )
			{
				$this->errors[] = "Файл '$file_location' не существует, пожалуйста проверьте настройки ссылки на шаблоны.";
				return;
			}
			
			$contents = $this->get_contents_with_fopen( $file_location );
		}
		else
		{
			//-------------------------------
			// Is URL - using GET?
			//-------------------------------
			
			if ( $this->use_sockets )
			{
				$contents = $this->get_contents_with_socket( $file_location );
			}
			else
			{
				$contents = $this->get_contents_with_fopen( $file_location );
			}
		}
		
		return $contents;
	}
	
	/*-------------------------------------------------------------------------*/
	// USE FOPEN TO GET TEXT
	/*-------------------------------------------------------------------------*/
	
	/**
	* Get file contents (with PHP's fopen)
	*
	* @return	string	File data
	*/
	function get_contents_with_fopen( $file_location )
	{
		//-------------------------------
		// INIT
		//-------------------------------
		
		$buffer = "";
		
		@clearstatcache();
			
		if ( $FILE = fopen( $file_location, "r") )
		{
			while ( ! feof( $FILE ) )
			{
			   $buffer .= fgets($FILE, 4096);
			}
			
			fclose($FILE);
		}
		
		return $buffer;
	}
	
	/*-------------------------------------------------------------------------*/
	// USE SOCKET TO GET TEXT
	/*-------------------------------------------------------------------------*/
	
	/**
	* Get file contents (with sockets)
	*
	* @return	string	File data
	*/
	function get_contents_with_socket( $file_location )
	{
		//-------------------------------
		// INIT
		//-------------------------------
		
		$data            = null;
		$fsocket_timeout = 10;
		
		//-------------------------------
		// Parse URL
		//-------------------------------
		
		$url_parts = parse_url($file_location);
		
		if ( ! $url_parts['host'] )
		{
			$this->errors[] = "No host found in the URL '$file_location'!";
			return FALSE;
		}
		
		//-------------------------------
		// Finalize
		//-------------------------------
		
		$host = $url_parts['host'];
      	$port = ( isset($url_parts['port']) ) ? $url_parts['port'] : 80;
      	
      	//-------------------------------
      	// Tidy up path
      	//-------------------------------
      	
      	if ( !empty( $url_parts["path"] ) )
		{
			$path = $url_parts["path"];
		}
		else
		{
			$path = "/";
		}
 
		if ( !empty( $url_parts["query"] ) )
		{
			$path .= "?" . $url_parts["query"];
		}
      	
      	//-------------------------------
      	// Open connection
      	//-------------------------------
      	
      	if ( ! $fp = @fsockopen( $host, $port, $errno, $errstr, $fsocket_timeout ) )
      	{
			$this->errors[] = "CONNECTION REFUSED FROM $host";
			return FALSE;
         
		}
		else
		{
			$final_carriage = "";
			if( ! $this->auth_req )
			{
				$final_carriage = "\r\n";
			}
			if ( ! fputs( $fp, "GET $path HTTP/1.0\r\nHost:$host\r\nConnection: Keep-Alive\r\n{$final_carriage}" ) )
			{
				$this->errors[] = "Unable to send request to $host!";
				return FALSE;
			}
			if( $this->auth_req )
			{
				if( $this->auth_user && $this->auth_pass )
				{
					$header = "Authorization: Basic ".base64_encode("{$this->auth_user}:{$this->auth_pass}")."\r\n\r\n";
					if ( ! fputs( $fp, $header ) )
					{
						$this->errors[] = "Authorization Failed!";
						return FALSE;
					}
				}
			}				
         }

         @stream_set_timeout($fp, $fsocket_timeout);
         
         $status = @socket_get_status($fp);
         
         while( ! feof($fp) && ! $status['timed_out'] )         
         {
            $data .= fgets ($fp,8192);
            $status = socket_get_status($fp);
         }
         
         fclose ($fp);
         
         //-------------------------------
         // Strip headers
         //-------------------------------
         
         $tmp = split("\r\n\r\n", $data, 2);
         $data = $tmp[1];

 		return $data;
	}
	
	/*-------------------------------------------------------------------------*/
	// USE cURL TO GET TEXT
	/*-------------------------------------------------------------------------*/
	
	/**
	* Get file contents (with cURL)
	*
	* @return	string	File data
	*/
	function get_contents_with_curl( $file_location )
	{
		if ( function_exists( 'curl_init' ) )
		{
			$ch = curl_init( $file_location );
			
			curl_setopt( $ch, CURLOPT_HEADER		 , 0);
			curl_setopt( $ch, CURLOPT_TIMEOUT        , 15 );
			curl_setopt( $ch, CURLOPT_POST           , 0 );
			curl_setopt( $ch, CURLOPT_RETURNTRANSFER , 1 ); 
			
			$data = curl_exec($ch);
			curl_close($ch);
			
			return $data ? $data : FALSE;
		}
		else
		{
			return FALSE;
		}
	}
	
}

?>