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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  
  18  /**
  19   * Accept uploading files by web service token to the user draft file area.
  20   *
  21   * POST params:
  22   *  token => the web service user token (needed for authentication)
  23   *  filepath => file path (where files will be stored)
  24   *  [_FILES] => for example you can send the files with <input type=file>,
  25   *              or with curl magic: 'file_1' => '@/path/to/file', or ...
  26   *  itemid   => The draftid - this can be used to add a list of files
  27   *              to a draft area in separate requests. If it is 0, a new draftid will be generated.
  28   *
  29   * @package    core_webservice
  30   * @copyright  2011 Dongsheng Cai <dongsheng@moodle.com>
  31   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  32   */
  33  
  34  /**
  35   * AJAX_SCRIPT - exception will be converted into JSON
  36   */
  37  define('AJAX_SCRIPT', true);
  38  
  39  /**
  40   * NO_MOODLE_COOKIES - we don't want any cookie
  41   */
  42  define('NO_MOODLE_COOKIES', true);
  43  
  44  require_once(__DIR__ . '/../config.php');
  45  require_once($CFG->dirroot . '/webservice/lib.php');
  46  $filepath = optional_param('filepath', '/', PARAM_PATH);
  47  $itemid = optional_param('itemid', 0, PARAM_INT);
  48  
  49  echo $OUTPUT->header();
  50  
  51  // authenticate the user
  52  $token = required_param('token', PARAM_ALPHANUM);
  53  $webservicelib = new webservice();
  54  $authenticationinfo = $webservicelib->authenticate_user($token);
  55  $fileuploaddisabled = empty($authenticationinfo['service']->uploadfiles);
  56  if ($fileuploaddisabled) {
  57      throw new webservice_access_exception('Web service file upload must be enabled in external service settings');
  58  }
  59  
  60  $context = context_user::instance($USER->id);
  61  
  62  $fs = get_file_storage();
  63  
  64  $totalsize = 0;
  65  $files = array();
  66  foreach ($_FILES as $fieldname=>$uploaded_file) {
  67      // check upload errors
  68      if (!empty($_FILES[$fieldname]['error'])) {
  69          switch ($_FILES[$fieldname]['error']) {
  70          case UPLOAD_ERR_INI_SIZE:
  71              throw new moodle_exception('upload_error_ini_size', 'repository_upload');
  72              break;
  73          case UPLOAD_ERR_FORM_SIZE:
  74              throw new moodle_exception('upload_error_form_size', 'repository_upload');
  75              break;
  76          case UPLOAD_ERR_PARTIAL:
  77              throw new moodle_exception('upload_error_partial', 'repository_upload');
  78              break;
  79          case UPLOAD_ERR_NO_FILE:
  80              throw new moodle_exception('upload_error_no_file', 'repository_upload');
  81              break;
  82          case UPLOAD_ERR_NO_TMP_DIR:
  83              throw new moodle_exception('upload_error_no_tmp_dir', 'repository_upload');
  84              break;
  85          case UPLOAD_ERR_CANT_WRITE:
  86              throw new moodle_exception('upload_error_cant_write', 'repository_upload');
  87              break;
  88          case UPLOAD_ERR_EXTENSION:
  89              throw new moodle_exception('upload_error_extension', 'repository_upload');
  90              break;
  91          default:
  92              throw new moodle_exception('nofile');
  93          }
  94      }
  95  
  96      // Scan for viruses.
  97      \core\antivirus\manager::scan_file($_FILES[$fieldname]['tmp_name'], $_FILES[$fieldname]['name'], true);
  98  
  99      $file = new stdClass();
 100      $file->filename = clean_param($_FILES[$fieldname]['name'], PARAM_FILE);
 101      // check system maxbytes setting
 102      if (($_FILES[$fieldname]['size'] > get_max_upload_file_size($CFG->maxbytes))) {
 103          // oversize file will be ignored, error added to array to notify
 104          // web service client
 105          $file->errortype = 'fileoversized';
 106          $file->error = get_string('maxbytes', 'error');
 107      } else {
 108          $file->filepath = $_FILES[$fieldname]['tmp_name'];
 109          // calculate total size of upload
 110          $totalsize += $_FILES[$fieldname]['size'];
 111      }
 112      $files[] = $file;
 113  }
 114  
 115  $fs = get_file_storage();
 116  
 117  if ($itemid <= 0) {
 118      $itemid = file_get_unused_draft_itemid();
 119  }
 120  
 121  // Get any existing file size limits.
 122  $maxupload = get_user_max_upload_file_size($context, $CFG->maxbytes);
 123  
 124  // Check the size of this upload.
 125  if ($maxupload !== USER_CAN_IGNORE_FILE_SIZE_LIMITS && $totalsize > $maxupload) {
 126      throw new file_exception('userquotalimit');
 127  }
 128  
 129  $results = array();
 130  foreach ($files as $file) {
 131      if (!empty($file->error)) {
 132          // including error and filename
 133          $results[] = $file;
 134          continue;
 135      }
 136      $file_record = new stdClass;
 137      $file_record->component = 'user';
 138      $file_record->contextid = $context->id;
 139      $file_record->userid    = $USER->id;
 140      $file_record->filearea  = 'draft';
 141      $file_record->filename = $file->filename;
 142      $file_record->filepath  = $filepath;
 143      $file_record->itemid    = $itemid;
 144      $file_record->license   = $CFG->sitedefaultlicense;
 145      $file_record->author    = fullname($authenticationinfo['user']);
 146      $file_record->source    = serialize((object)array('source' => $file->filename));
 147  
 148      //Check if the file already exist
 149      $existingfile = $fs->file_exists($file_record->contextid, $file_record->component, $file_record->filearea,
 150                  $file_record->itemid, $file_record->filepath, $file_record->filename);
 151      if ($existingfile) {
 152          $file->errortype = 'filenameexist';
 153          $file->error = get_string('filenameexist', 'webservice', $file->filename);
 154          $results[] = $file;
 155      } else {
 156          $stored_file = $fs->create_file_from_pathname($file_record, $file->filepath);
 157          $results[] = $file_record;
 158      }
 159  }
 160  echo json_encode($results);