Current File : //home2/vacivi36/ava/mod/bigbluebuttonbn/classes/local/proxy/curl.php
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* A curl wrapper for bbb.
*
* @package mod_bigbluebuttonbn
* @copyright 2021 Andrew Lyons <andrew@nicols.co.uk>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace mod_bigbluebuttonbn\local\proxy;
use SimpleXMLElement;
defined('MOODLE_INTERNAL') || die;
global $CFG;
require_once("{$CFG->libdir}/filelib.php");
/**
* A curl wrapper for bbb.
*
* @package mod_bigbluebuttonbn
* @copyright 2021 Andrew Lyons <andrew@nicols.co.uk>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class curl extends \curl {
/** @var string */
protected $contenttype;
/**
* Constructor for the class.
*/
public function __construct() {
$settings = [];
if (debugging()) {
$settings = ['ignoresecurity' => true];
}
parent::__construct($settings);
$this->setopt(['SSL_VERIFYPEER' => true]);
$this->set_content_type('text/xml');
}
/**
* Fetch the content type.
*/
public function get_content_type(): string {
return $this->contenttype;
}
/**
* Set the desired current content type.
*
* @param string $type
* @return self
*/
public function set_content_type(string $type): self {
$this->contenttype = $type;
return $this;
}
/**
* HTTP POST method
*
* @param string $url
* @param array|string $params
* @param array $options
* @return null|SimpleXMLElement Null on error
*/
public function post($url, $params = '', $options = []) {
if (!is_string($params)) {
debugging('Only string parameters are supported', DEBUG_DEVELOPER);
$params = '';
}
$options = array_merge($options, [
'CURLOPT_HTTPHEADER' => [
'Content-Type: ' . $this->get_content_type(),
'Content-Length: ' . strlen($params),
'Content-Language: en-US',
]
]);
return $this->handle_response(parent::post($url, $params, $options));
}
/**
* Fetch the specified URL via a HEAD request.
*
* @param string $url
* @param array $options
*/
public function head($url, $options = []) {
$options['followlocation'] = true;
$options['timeout'] = 1;
parent::head($url, $options);
return $this->get_info();
}
/**
* Fetch the specified URL via a GET request.
*
* @param string $url
* @param string $params
* @param array $options
*/
public function get($url, $params = [], $options = []) {
return $this->handle_response(parent::get($url, $params, $options));
}
/**
* Handle the response.
*
* @param mixed $response
* @return null|SimpleXMLElement Null on error
*/
protected function handle_response($response): ?SimpleXMLElement {
if (!$response) {
debugging('No response returned for call', DEBUG_DEVELOPER);
return null;
}
$previous = libxml_use_internal_errors(true);
try {
$xml = simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOCDATA | LIBXML_NOBLANKS);
} catch (Exception $e) {
libxml_use_internal_errors($previous);
debugging('Caught exception: ' . $e->getMessage(), DEBUG_DEVELOPER);
return null;
}
if ($xml instanceof SimpleXMLElement) {
return $xml;
}
$debugabstract = html_to_text($response);
$debugabstract = substr($debugabstract, 0, 1024); // Limit to small amount of info so we do not overload logs.
debugging('Issue retrieving information from the server: ' . $debugabstract, DEBUG_DEVELOPER);
return null;
}
}
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