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<?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/>.
/**
* repository_url class
* A subclass of repository, which is used to download a file from a specific url
*
* @since 2.0
* @package repository
* @subpackage url
* @copyright 2009 Dongsheng Cai
* @author Dongsheng Cai <dongsheng@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(dirname(__FILE__).'/locallib.php');
class repository_url extends repository {
/**
* @param int $repositoryid
* @param object $context
* @param array $options
*/
public function __construct($repositoryid, $context = SYSCONTEXTID, $options = array()){
global $CFG;
parent::__construct($repositoryid, $context, $options);
$this->file_url = optional_param('file', '', PARAM_RAW);
}
public function get_file($url, $file = '') {
global $CFG;
//$CFG->repository_no_delete = true;
$path = $this->prepare_file($file);
$fp = fopen($path, 'w');
$c = new curl;
$c->download(array(array('url'=>$url, 'file'=>$fp)));
return array('path'=>$path, 'url'=>$url);
}
public function check_login() {
if (!empty($this->file_url)) {
return true;
} else {
return false;
}
}
/**
* @return mixed
*/
public function print_login() {
$strdownload = get_string('download', 'repository');
$strname = get_string('rename', 'repository_url');
$strurl = get_string('url', 'repository_url');
if ($this->options['ajax']) {
$url = new stdClass();
$url->label = $strurl.': ';
$url->id = 'fileurl';
$url->type = 'text';
$url->name = 'file';
$ret['login'] = array($url);
$ret['login_btn_label'] = get_string('download', 'repository_url');
return $ret;
} else {
echo <<<EOD
<table>
<tr>
<td>{$strurl}: </td><td><input name="file" type="text" /></td>
</tr>
</table>
<input type="submit" value="{$strdownload}" />
EOD;
}
}
/**
* @param mixed $path
* @param string $search
* @return array
*/
public function get_listing($path='', $page='') {
global $CFG, $OUTPUT;
$ret = array();
$curl = new curl;
$curl->setopt(array('CURLOPT_FOLLOWLOCATION' => true, 'CURLOPT_MAXREDIRS' => 3));
$msg = $curl->head($this->file_url);
$info = $curl->get_info();
if ($info['http_code'] != 200) {
$ret['e'] = $msg;
} else {
$ret['list'] = array();
$ret['nosearch'] = true;
$ret['nologin'] = true;
$filename = $this->guess_filename($info['url'], $info['content_type']);
if (strstr($info['content_type'], 'text/html') || empty($info['content_type'])) {
// analysis this web page, general file list
$ret['list'] = array();
$content = $curl->get($info['url']);
$this->analyse_page($info['url'], $content, $ret);
} else {
// download this file
$ret['list'][] = array(
'title'=>$filename,
'source'=>$this->file_url,
'thumbnail' => $OUTPUT->pix_url(file_extension_icon($filename, 32))->out(false)
);
}
}
return $ret;
}
public function analyse_page($baseurl, $content, &$list) {
global $CFG, $OUTPUT;
$urls = extract_html_urls($content);
$images = $urls['img']['src'];
$pattern = '#img(.+)src="?\'?([[:alnum:]:?=&@/._+-]+)"?\'?#i';
if (!empty($images)) {
foreach($images as $url) {
$list['list'][] = array(
'title'=>$this->guess_filename($url, ''),
'source'=>url_to_absolute($baseurl, $url),
'thumbnail'=>url_to_absolute($baseurl, $url),
'thumbnail_height'=>84,
'thumbnail_width'=>84
);
}
}
}
public function guess_filename($url, $type) {
$pattern = '#\/([\w_\?\-.]+)$#';
$matches = null;
preg_match($pattern, $url, $matches);
if (empty($matches[1])) {
return $url;
} else {
return $matches[1];
}
}
public function supported_returntypes() {
return (FILE_INTERNAL | FILE_EXTERNAL);
}
}
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