3 // This file is part of Moodle - http://moodle.org/
5 // Moodle is free software: you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation, either version 3 of the License, or
8 // (at your option) any later version.
10 // Moodle is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
19 * This plugin is used to access files by providing an url
22 * @package repository_url
23 * @copyright 2010 Dongsheng Cai {@link http://dongsheng.org}
24 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
26 require_once($CFG->dirroot . '/repository/lib.php');
27 require_once(dirname(__FILE__).'/locallib.php');
30 * repository_url class
31 * A subclass of repository, which is used to download a file from a specific url
34 * @package repository_url
35 * @copyright 2009 Dongsheng Cai {@link http://dongsheng.org}
36 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
38 class repository_url extends repository {
39 var $processedfiles = array();
42 * @param int $repositoryid
43 * @param object $context
44 * @param array $options
46 public function __construct($repositoryid, $context = SYSCONTEXTID, $options = array()){
48 parent::__construct($repositoryid, $context, $options);
49 $this->file_url = optional_param('file', '', PARAM_RAW);
52 public function check_login() {
53 if (!empty($this->file_url)) {
62 public function print_login() {
63 $strdownload = get_string('download', 'repository');
64 $strname = get_string('rename', 'repository_url');
65 $strurl = get_string('url', 'repository_url');
66 if ($this->options['ajax']) {
67 $url = new stdClass();
68 $url->label = $strurl.': ';
73 $ret['login'] = array($url);
74 $ret['login_btn_label'] = get_string('download', 'repository_url');
75 $ret['allowcaching'] = true; // indicates that login form can be cached in filepicker.js
81 <td>{$strurl}: </td><td><input name="file" type="text" /></td>
84 <input type="submit" value="{$strdownload}" />
92 * @param string $search
95 public function get_listing($path='', $page='') {
98 $ret['list'] = array();
99 $ret['nosearch'] = true;
100 $ret['norefresh'] = true;
101 $ret['nologin'] = true;
103 $this->parse_file(null, $this->file_url, $ret, true);
108 * Parses one file (either html or css)
110 * @param string $baseurl (optional) URL of the file where link to this file was found
111 * @param string $relativeurl relative or absolute link to the file
113 * @param bool $mainfile true only for main HTML false and false for all embedded/linked files
115 protected function parse_file($baseurl, $relativeurl, &$list, $mainfile = false) {
116 if (preg_match('/([\'"])(.*)\1/', $relativeurl, $matches)) {
117 $relativeurl = $matches[2];
119 if (empty($baseurl)) {
122 $url = htmlspecialchars_decode(url_to_absolute($baseurl, $relativeurl));
124 if (in_array($url, $this->processedfiles)) {
125 // avoid endless recursion
128 $this->processedfiles[] = $url;
130 $msg = $curl->head($url);
131 $info = $curl->get_info();
132 if ($info['http_code'] != 200) {
134 $list['error'] = $msg;
138 if ($mainfile && (strstr($info['content_type'], 'text/html') || empty($info['content_type']))) {
140 $htmlcontent = $curl->get($info['url']);
141 $ddoc = new DOMDocument();
142 @$ddoc->loadHTML($htmlcontent);
144 $tags = $ddoc->getElementsByTagName('img');
145 foreach ($tags as $tag) {
146 $url = $tag->getAttribute('src');
147 $this->add_image_to_list($info['url'], $url, $list);
149 // analyse embedded css (<style>)
150 $tags = $ddoc->getElementsByTagName('style');
151 foreach ($tags as $tag) {
152 if ($tag->getAttribute('type') == 'text/css') {
153 $csstoanalyze .= $tag->textContent."\n";
156 // analyse links to css (<link type='text/css' href='...'>)
157 $tags = $ddoc->getElementsByTagName('link');
158 foreach ($tags as $tag) {
159 if ($tag->getAttribute('type') == 'text/css' && strlen($tag->getAttribute('href'))) {
160 $this->parse_file($info['url'], $tag->getAttribute('href'), $list);
163 } else if (strstr($info['content_type'], 'css')) {
165 $csscontent = $curl->get($info['url']);
166 $csstoanalyze .= $csscontent."\n";
167 } else if (strstr($info['content_type'], 'image/')) {
168 // download this file
169 $this->add_image_to_list($info['url'], $info['url'], $list);
172 // parse all found css styles
173 if (strlen($csstoanalyze)) {
174 $urls = extract_css_urls($csstoanalyze);
175 if (!empty($urls['property'])) {
176 foreach ($urls['property'] as $url) {
177 $this->add_image_to_list($info['url'], $url, $list);
180 if (!empty($urls['import'])) {
181 foreach ($urls['import'] as $cssurl) {
182 $this->parse_file($info['url'], $cssurl, $list);
188 protected function add_image_to_list($baseurl, $url, &$list) {
189 if (empty($list['list'])) {
190 $list['list'] = array();
192 $src = url_to_absolute($baseurl, htmlspecialchars_decode($url));
193 foreach ($list['list'] as $image) {
194 if ($image['source'] == $src) {
198 $list['list'][] = array(
199 'title'=>$this->guess_filename($url, ''),
202 'thumbnail_height'=>84,
203 'thumbnail_width'=>84
206 public function guess_filename($url, $type) {
207 $pattern = '#\/([\w_\?\-.]+)$#';
209 preg_match($pattern, $url, $matches);
210 if (empty($matches[1])) {
217 public function supported_returntypes() {
218 return (FILE_INTERNAL | FILE_EXTERNAL);
222 * Return the source information
224 * @param stdClass $url
225 * @return string|null
227 public function get_file_source_info($url) {