File: /home/altinkayamarble/www/wp-content/plugins/akeebabackupwp/app/Awf/Download/Adapter/Curl.php
<?php
/**
* @package awf
* @copyright Copyright (c)2014-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU GPL version 3 or later
*/
namespace Awf\Download\Adapter;
use Awf\Download\DownloadInterface;
use Awf\Text\Text;
/**
* A download adapter using the cURL PHP integration
*/
class Curl extends AbstractAdapter implements DownloadInterface
{
protected $headers = array();
public function __construct()
{
$this->priority = 110;
$this->supportsFileSize = true;
$this->supportsChunkDownload = true;
$this->name = 'curl';
$this->isSupported = function_exists('curl_init') && function_exists('curl_exec') && function_exists('curl_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 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())
{
$ch = curl_init();
if (empty($from))
{
$from = 0;
}
if (empty($to))
{
$to = 0;
}
if ($to < $from)
{
$temp = $to;
$to = $from;
$from = $temp;
unset($temp);
}
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
@curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_SSLVERSION, 0);
curl_setopt($ch, CURLOPT_CAINFO, __DIR__ . '/cacert.pem');
curl_setopt($ch, CURLOPT_HEADERFUNCTION, array($this, 'reponseHeaderCallback'));
if (!(empty($from) && empty($to)))
{
curl_setopt($ch, CURLOPT_RANGE, "$from-$to");
}
if (!is_array($params))
{
$params = array();
}
$patched_accept_encoding = false;
// Work around LiteSpeed sending compressed output under HTTP/2 when no encoding was requested
// See https://github.com/joomla/joomla-cms/issues/21423#issuecomment-410941000
if (defined('CURLOPT_ACCEPT_ENCODING'))
{
if (!array_key_exists(CURLOPT_ACCEPT_ENCODING, $params))
{
$params[CURLOPT_ACCEPT_ENCODING] = 'identity';
}
$patched_accept_encoding = true;
}
if (isset($params['proxy']))
{
$proxyParams = $params['proxy'];
unset($params['proxy']);
$host = isset($proxyParams['host']) ? trim($proxyParams['host']) : '';
$port = isset($proxyParams['port']) ? (int) $proxyParams['port'] : 0;
$user = isset($proxyParams['user']) ? trim($proxyParams['user']) : '';
$pass = isset($proxyParams['pass']) ? trim($proxyParams['pass']) : '';
$enabled = !empty($host) && !empty($port) && ($port > 0) && ($port < 65536);
if ($enabled)
{
curl_setopt($ch, CURLOPT_PROXY, $host . ':' . $port);
if (!empty($user))
{
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $user . ':' . $pass);
}
}
}
if (!empty($params))
{
foreach ($params as $k => $v)
{
// I couldn't patch the accept encoding header (missing constant), so I'll check if we manually set it
if (!$patched_accept_encoding && $k == CURLOPT_HTTPHEADER)
{
foreach ($v as $custom_header)
{
// Ok, we explicitly set the Accept-Encoding header, so we consider it patched
if (stripos($custom_header, 'Accept-Encoding') !== false)
{
$patched_accept_encoding = true;
}
}
}
@curl_setopt($ch, $k, $v);
}
}
// Accept encoding wasn't patched, let's manually do that
if (!$patched_accept_encoding)
{
@curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept-Encoding: identity'));
$patched_accept_encoding = true;
}
$result = curl_exec($ch);
$errno = curl_errno($ch);
$errmsg = curl_error($ch);
$error = '';
$http_status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if ($result === false)
{
$error = Text::sprintf('AWF_DOWNLOAD_ERR_LIB_CURL_ERROR', $errno, $errmsg);
}
elseif (($http_status >= 300) && ($http_status <= 399) && isset($this->headers['location']) && !empty($this->headers['location']))
{
return $this->downloadAndReturn($this->headers['location'], $from, $to, $params);
}
elseif ($http_status > 299)
{
$result = false;
$errno = $http_status;
$error = Text::sprintf('AWF_DOWNLOAD_ERR_LIB_HTTPERROR', $http_status);
}
curl_close($ch);
if ($result === false)
{
throw new \Exception($error, $errno);
}
else
{
return $result;
}
}
/**
* Get the size of a remote file in bytes
*
* @param string $url The remote file's URL
*
* @return integer The file size, or -1 if the remote server doesn't support this feature
*/
public function getFileSize($url, array $params = array())
{
$result = -1;
$ch = curl_init();
curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_SSLVERSION, 0);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_NOBODY, true );
curl_setopt($ch, CURLOPT_HEADER, true );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true );
@curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true );
curl_setopt($ch, CURLOPT_CAINFO, __DIR__ . '/cacert.pem');
$patched_accept_encoding = false;
// Work around LiteSpeed sending compressed output under HTTP/2 when no encoding was requested
// See https://github.com/joomla/joomla-cms/issues/21423#issuecomment-410941000
if (defined('CURLOPT_ACCEPT_ENCODING'))
{
if (!array_key_exists(CURLOPT_ACCEPT_ENCODING, $params))
{
$params[CURLOPT_ACCEPT_ENCODING] = 'identity';
}
$patched_accept_encoding = true;
}
if (isset($params['proxy']))
{
$proxyParams = $params['proxy'];
unset($params['proxy']);
$host = isset($proxyParams['host']) ? trim($proxyParams['host']) : '';
$port = isset($proxyParams['port']) ? (int) $proxyParams['port'] : 0;
$user = isset($proxyParams['user']) ? trim($proxyParams['user']) : '';
$pass = isset($proxyParams['pass']) ? trim($proxyParams['pass']) : '';
$enabled = !empty($host) && !empty($port) && ($port > 0) && ($port < 65536);
if ($enabled)
{
curl_setopt($ch, CURLOPT_PROXY, $host . ':' . $port);
if (!empty($user))
{
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $user . ':' . $pass);
}
}
}
if (!empty($params))
{
foreach ($params as $k => $v)
{
// I couldn't patch the accept encoding header (missing constant), so I'll check if we manually set it
if (!$patched_accept_encoding && $k == CURLOPT_HTTPHEADER)
{
foreach ($v as $custom_header)
{
// Ok, we explicitly set the Accept-Encoding header, so we consider it patched
if (stripos($custom_header, 'Accept-Encoding') !== false)
{
$patched_accept_encoding = true;
}
}
}
@curl_setopt($ch, $k, $v);
}
}
$data = curl_exec($ch);
curl_close($ch);
if ($data)
{
$content_length = "unknown";
$status = "unknown";
$redirection = null;
if (preg_match( "/^HTTP\/1\.[01] (\d\d\d)/i", $data, $matches))
{
$status = (int)$matches[1];
}
if (preg_match( "/Content-Length: (\d+)/i", $data, $matches))
{
$content_length = (int)$matches[1];
}
if (preg_match( "/Location: (.*)/i", $data, $matches))
{
$redirection = (int)$matches[1];
}
if( $status == 200 || ($status > 300 && $status <= 308) )
{
$result = $content_length;
}
if (($status > 300) && ($status <= 308))
{
if (!empty($redirection))
{
return $this->getFileSize($redirection, $params);
}
return -1;
}
}
return $result;
}
/**
* Handles the HTTP headers returned by cURL
*
* @param resource $ch cURL resource handle (unused)
* @param string $data Each header line, as returned by the server
*
* @return int The length of the $data string
*/
protected function reponseHeaderCallback($ch, $data)
{
$strlen = strlen($data);
if (($strlen) <= 2)
{
return $strlen;
}
if (substr($data, 0, 4) == 'HTTP')
{
return $strlen;
}
if (strpos($data, ':') === false)
{
return $strlen;
}
list($header, $value) = explode(': ', trim($data), 2);
$this->headers[strtolower($header)] = $value;
return $strlen;
}
}