fopen.php
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<?php
/**
* @package FrameworkOnFramework
* @subpackage dispatcher
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// Protect from unauthorized access
defined('FOF_INCLUDED') or die;
/**
* A download adapter using URL fopen() wrappers
*/
class FOFDownloadAdapterFopen extends FOFDownloadAdapterAbstract implements FOFDownloadInterface
{
public function __construct()
{
$this->priority = 100;
$this->supportsFileSize = false;
$this->supportsChunkDownload = true;
$this->name = 'fopen';
// If we are not allowed to use ini_get, we assume that URL fopen is
// disabled.
if (!function_exists('ini_get'))
{
$this->isSupported = false;
}
else
{
$this->isSupported = ini_get('allow_url_fopen');
}
}
/**
* Download a part (or the whole) of a remote URL and return the downloaded
* data. You are supposed to check the size of the returned data. If it's
* smaller than what you expected you've reached end of file. If it's empty
* you have tried reading past EOF. If it's larger than what you expected
* the server doesn't support chunk downloads.
*
* If this class' supportsChunkDownload returns false you should assume
* that the $from and $to parameters will be ignored.
*
* @param string $url The remote file's URL
* @param integer $from Byte range to start downloading from. Use null for start of file.
* @param integer $to Byte range to stop downloading. Use null to download the entire file ($from is ignored)
* @param array $params Additional params that will be added before performing the download
*
* @return string The raw file data retrieved from the remote URL.
*
* @throws Exception A generic exception is thrown on error
*/
public function downloadAndReturn($url, $from = null, $to = null, array $params = array())
{
if (empty($from))
{
$from = 0;
}
if (empty($to))
{
$to = 0;
}
if ($to < $from)
{
$temp = $to;
$to = $from;
$from = $temp;
unset($temp);
}
if (!(empty($from) && empty($to)))
{
$options = array(
'http' => array(
'method' => 'GET',
'header' => "Range: bytes=$from-$to\r\n"
),
'ssl' => array(
'verify_peer' => true,
'cafile' => __DIR__ . '/cacert.pem',
'verify_depth' => 5,
)
);
$options = array_merge($options, $params);
$context = stream_context_create($options);
$result = @file_get_contents($url, false, $context, $from - $to + 1);
}
else
{
$options = array(
'http' => array(
'method' => 'GET',
),
'ssl' => array(
'verify_peer' => true,
'cafile' => __DIR__ . '/cacert.pem',
'verify_depth' => 5,
)
);
$options = array_merge($options, $params);
$context = stream_context_create($options);
$result = @file_get_contents($url, false, $context);
}
if ($result === false)
{
$error = JText::sprintf('LIB_FOF_DOWNLOAD_ERR_HTTPERROR');
throw new Exception($error, 1);
}
else
{
return $result;
}
}
}