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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 the cURL PHP integration.
*/
class AcuDownloadAdapterCurl extends AcuDownloadAdapterAbstract implements AcuDownloadInterface
{
public function __construct()
{
$this->priority = 110;
$this->supportsFileSize = true;
$this->supportsChunkDownload = true;
$this->name = 'c' . 'u' . 'r' . 'l';
$this->isSupported = function_exists('c' . 'u' . 'r' . 'l' . '_init') && function_exists(
'c' . 'u' . 'r' . 'l' . '_exec'
) && function_exists('c' . 'u' . 'r' . 'l' . '_close');
}
/**
* 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, $nofollow = false)
{
$ch = curl_init();
curl_setopt($ch, \CURLOPT_URL, $url);
curl_setopt($ch, \CURLOPT_BINARYTRANSFER, 1);
curl_setopt($ch, \CURLOPT_RETURNTRANSFER, 1);
@curl_setopt($ch, \CURLOPT_FOLLOWLOCATION, 1);
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))) {
curl_setopt($ch, \CURLOPT_RANGE, "$from-$to");
}
if (! @curl_setopt($ch, \CURLOPT_FOLLOWLOCATION, 1) && ! $nofollow) {
// Safe Mode is enabled. We have to fetch the headers and
// parse any redirections present in there.
curl_setopt($ch, \CURLOPT_AUTOREFERER, true);
curl_setopt($ch, \CURLOPT_FAILONERROR, true);
curl_setopt($ch, \CURLOPT_HEADER, true);
curl_setopt($ch, \CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, \CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, \CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($ch, \CURLOPT_TIMEOUT, 30);
// Get the headers.
$data = curl_exec($ch);
curl_close($ch);
// Init
$newURL = $url;
// Parse the headers.
$lines = explode("\n", $data);
foreach ($lines as $line) {
if ('Location:' == substr($line, 0, 9)) {
$newURL = trim(substr($line, 9));
}
}
if ($url != $newURL) {
return $this->downloadAndReturn($newURL);
} else {
return $this->downloadAndReturn($newURL, null, null, true);
}
} else {
@curl_setopt($ch, \CURLOPT_MAXREDIRS, 20);
if (function_exists('set_time_limit')) {
set_time_limit(0);
}
}
$result = curl_exec($ch);
$errno = curl_errno($ch);
$errmsg = curl_error($ch);
$http_status = curl_getinfo($ch, \CURLINFO_HTTP_CODE);
if (false === $result) {
$error = JText::sprintf('COM_CMSUPDATE_ERR_LIB_' . 'C' . 'U' . 'R' . 'L' . '_ERROR' . $errmsg, $errno, $errmsg);
} elseif ($http_status > 299) {
$result = false;
$errno = $http_status;
$error = JText::sprintf('COM_CMSUPDATE_ERR_LIB_HTTPERROR', $http_status);
}
curl_close($ch);
if (false === $result) {
throw new Exception($error, $errno);
} else {
return $result;
}
}
/**
* Get the size of a remote file in bytes.
*
* @param string $url The remote file's URL
*
* @return int The file size, or -1 if the remote server doesn't support this feature
*/
public function getFileSize($url)
{
$result = -1;
$ch = curl_init();
curl_setopt($ch, \CURLOPT_URL, $url);
curl_setopt($ch, \CURLOPT_NOBODY, true);
curl_setopt($ch, \CURLOPT_HEADER, true);
curl_setopt($ch, \CURLOPT_RETURNTRANSFER, true);
@curl_setopt($ch, \CURLOPT_FOLLOWLOCATION, true);
$data = curl_exec($ch);
curl_close($ch);
if ($data) {
$content_length = 'unknown';
$status = 'unknown';
if (preg_match("/^HTTP\/1\.[01] (\d\d\d)/", $data, $matches)) {
$status = (int) $matches[1];
}
if (preg_match("/Content-Length: (\d+)/", $data, $matches)) {
$content_length = (int) $matches[1];
}
if (200 == $status || ($status > 300 && $status <= 308)) {
$result = $content_length;
}
}
return $result;
}
}