repository/url/lib.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   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.
   9 //
  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.
  14 //
  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/>.
  17
  18 /**
  19  * repository_url class
  20  * A subclass of repository, which is used to download a file from a specific url
  21  *
  22  * @since 2.0
  23  * @package    repository
  24  * @subpackage url
  25  * @copyright  2009 Dongsheng Cai
  26  * @author     Dongsheng Cai <dongsheng@moodle.com>
  27  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  28  */
  29
  30 require_once(dirname(__FILE__).'/locallib.php');
  31
  32 class repository_url extends repository {
  33
  34     /**
  35      * @param int $repositoryid
  36      * @param object $context
  37      * @param array $options
  38      */
  39     public function __construct($repositoryid, $context = SYSCONTEXTID, $options = array()){
  40         global $CFG;
  41         parent::__construct($repositoryid, $context, $options);
  42         $this->file_url = optional_param('file', '', PARAM_RAW);
  43     }
  44
  45     public function get_file($url, $file = '') {
  46         global $CFG;
  47         //$CFG->repository_no_delete = true;
  48         $path = $this->prepare_file($file);
  49         $fp = fopen($path, 'w');
  50         $c = new curl;
  51         $c->download(array(array('url'=>$url, 'file'=>$fp)));
  52         return array('path'=>$path, 'url'=>$url);
  53     }
  54
  55     public function check_login() {
  56         if (!empty($this->file_url)) {
  57             return true;
  58         } else {
  59             return false;
  60         }
  61     }
  62     /**
  63      * @return mixed
  64      */
  65     public function print_login() {
  66         $strdownload = get_string('download', 'repository');
  67         $strname     = get_string('rename', 'repository_url');
  68         $strurl      = get_string('url', 'repository_url');
  69         if ($this->options['ajax']) {
  70             $url = new stdClass();
  71             $url->label = $strurl.': ';
  72             $url->id   = 'fileurl';
  73             $url->type = 'text';
  74             $url->name = 'file';
  75
  76             $ret['login'] = array($url);
  77             $ret['login_btn_label'] = get_string('download', 'repository_url');
  78             return $ret;
  79         } else {
  80             echo <<<EOD
  81 <table>
  82 <tr>
  83 <td>{$strurl}: </td><td><input name="file" type="text" /></td>
  84 </tr>
  85 </table>
  86 <input type="submit" value="{$strdownload}" />
  87 EOD;
  88
  89         }
  90     }
  91
  92     /**
  93      * @param mixed $path
  94      * @param string $search
  95      * @return array
  96      */
  97     public function get_listing($path='', $page='') {
  98         global $CFG, $OUTPUT;
  99         $ret = array();
 100         $curl = new curl;
 101         $msg = $curl->head($this->file_url);
 102         $info = $curl->get_info();
 103         if ($info['http_code'] != 200) {
 104             $ret['e'] = $msg;
 105         } else {
 106             $ret['list'] = array();
 107             $ret['nosearch'] = true;
 108             $ret['nologin'] = true;
 109             $filename = $this->guess_filename($info['url'], $info['content_type']);
 110             if (strstr($info['content_type'], 'text/html') || empty($info['content_type'])) {
 111                 // analysis this web page, general file list
 112                 $ret['list'] = array();
 113                 $content = $curl->get($info['url']);
 114                 $this->analyse_page($info['url'], $content, $ret);
 115             } else {
 116                 // download this file
 117                 $ret['list'][] = array(
 118                     'title'=>$filename,
 119                     'source'=>$this->file_url,
 120                     'thumbnail' => $OUTPUT->pix_url(file_extension_icon($filename, 32))->out(false)
 121                     );
 122             }
 123         }
 124         return $ret;
 125     }
 126     public function analyse_page($baseurl, $content, &$list) {
 127         global $CFG, $OUTPUT;
 128         $urls = extract_html_urls($content);
 129         $images = $urls['img']['src'];
 130         $pattern = '#img(.+)src="?\'?([[:alnum:]:?=&@/._+-]+)"?\'?#i';
 131         if (!empty($images)) {
 132             foreach($images as $url) {
 133                 $list['list'][] = array(
 134                     'title'=>$this->guess_filename($url, ''),
 135                     'source'=>url_to_absolute($baseurl, $url),
 136                     'thumbnail'=>url_to_absolute($baseurl, $url),
 137                     'thumbnail_height'=>84,
 138                     'thumbnail_width'=>84
 139                 );
 140             }
 141         }
 142     }
 143     public function guess_filename($url, $type) {
 144         $pattern = '#\/([\w_\?\-.]+)$#';
 145         $matches = null;
 146         preg_match($pattern, $url, $matches);
 147         if (empty($matches[1])) {
 148             return $url;
 149         } else {
 150             return $matches[1];
 151         }
 152     }
 153
 154     public function supported_returntypes() {
 155         return (FILE_INTERNAL | FILE_EXTERNAL);
 156     }
 157 }
 158