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<?php
/*
* @package bfNetwork
* @copyright Copyright (C) 2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023 Blue Flame Digital Solutions Ltd. All rights reserved.
* @license GNU General Public License version 3 or later
*
* @see https://mySites.guru/
* @see https://www.phil-taylor.com/
*
* @author Phil Taylor / Blue Flame Digital Solutions Limited.
*
* bfNetwork is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* bfNetwork 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this package. If not, see http://www.gnu.org/licenses/
*
* If you have any questions regarding this code, please contact phil@phil-taylor.com
*/
/**
* @copyright Copyright (c)2010-2014 Nicholas K. Dionysopoulos
* @license GNU General Public License version 3, or later
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* A download adapter using URL fopen() wrappers.
*/
class AcuDownloadAdapterFopen extends AcuDownloadAdapterAbstract implements AcuDownloadInterface
{
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 int $from Byte range to start downloading from. Use null for start of file.
* @param int $to Byte range to stop downloading. Use null to download the entire file ($from is ignored)
*
* @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, $to = null)
{
if (empty($from)) {
$from = 0;
}
if (empty($to)) {
$to = 0;
}
if ($to < $from) {
$temp = $to;
$to = $from;
$from = $temp;
unset($temp);
}
if (! (empty($from) && empty($to))) {
$options = [
'http' => [
'method' => 'GET',
'header' => "Range: bytes=$from-$to\r\n",
],
'ssl' => [
'verify_peer' => false, // FFS!!! CRAP SERVERS
'verify_peer_name' => false, // FFS!!! CRAP SERVERS
],
];
$context = stream_context_create($options);
$result = @file_get_contents($url, false, $context, $from - $to + 1);
} else {
$options = [
'http' => [
'method' => 'GET',
],
'ssl' => [
'verify_peer' => false, // FFS!!! CRAP SERVERS
'verify_peer_name' => false, // FFS!!! CRAP SERVERS
],
];
$context = stream_context_create($options);
$result = @file_get_contents($url, false, $context);
}
if (false === $result) {
$error = JText::sprintf('COM_CMSUPDATE_ERR_LIB_FOPEN_ERROR');
throw new Exception($error, 1);
} else {
return $result;
}
}
}