[Sommaire] [Imprimer]

   1  <?php
   2  
   3  ////////////////////////////////////////////////////////////////////////////////
   4  //                                                                            //
   5  //   Copyright (C) 2006  Phorum Development Team                              //
   6  //   http://www.phorum.org                                                    //
   7  //                                                                            //
   8  //   This program is free software. You can redistribute it and/or modify     //
   9  //   it under the terms of either the current Phorum License (viewable at     //
  10  //   phorum.org) or the Phorum License that was distributed with this file    //
  11  //                                                                            //
  12  //   This program is distributed in the hope that it will be useful,          //
  13  //   but WITHOUT ANY WARRANTY, without even the implied warranty of           //
  14  //   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                     //
  15  //                                                                            //
  16  //   You should have received a copy of the Phorum License                    //
  17  //   along with this program.                                                 //
  18  ////////////////////////////////////////////////////////////////////////////////
  19  
  20      // Check if the Phorum file uploading settings match the
  21      // limits that are imposed by the system.
  22  
  23      // TODO (document in faq / documentation)
  24      // The upload size can be limited by Apache's LimitRequestBody directive,
  25      // but we cannot check that one from PHP.
  26  
  27      require_once ('./include/format_functions.php'); // For phorum_filesize()
  28      require_once ('./include/upload_functions.php');
  29  
  30      $phorum_check = "File uploading (personal files and attachments)";
  31  
  32      function phorum_check_upload_limits() {
  33          $PHORUM = $GLOBALS["PHORUM"];
  34  
  35          // Keep track if uploads are used.
  36          $upload_used = false;
  37  
  38          // Get the maximum file upload size for PHP.
  39          list ($system_max_upload, $php_max_upload, $db_max_upload) = phorum_get_system_max_upload();
  40  
  41          // Check limits for file uploading in personal profile.
  42          if ($PHORUM["file_uploads"] && $PHORUM["max_file_size"]) {
  43              $upload_used = true;
  44              $res = phorum_single_check_upload_limits(
  45                  $PHORUM["max_file_size"]*1024,
  46                  "the Max File Size option for user file uploads " .
  47                  "(in their profile)",
  48                  $php_max_upload, $db_max_upload
  49              );
  50              if ($res != NULL) return $res;
  51          }
  52  
  53          // Check limits for attachment uploading in forums.
  54          $forums = phorum_db_get_forums();
  55          foreach ($forums as $id => $forum) {
  56              if ($forum["max_attachments"] > 0 && $forum["max_attachment_size"]) {
  57                  $upload_used = true;
  58                  $res = phorum_single_check_upload_limits(
  59                      $forum["max_attachment_size"]*1024,
  60                      "the Max File Size option for uploading attachments
  61                       in the forum \"{$forum['name']}\"",
  62                      $php_max_upload, $db_max_upload
  63                  );
  64                  if ($res != NULL) return $res;
  65              }
  66          }
  67  
  68          // No upload functionality found so far? Then we're done.
  69          if (! $upload_used) return array(PHORUM_SANITY_OK, NULL);
  70  
  71          // Check if the upload temp directory can be written.
  72          $tmpdir = get_cfg_var('upload_tmp_dir');
  73          if (!empty($tmpdir)) {
  74              $fp = @fopen("$tmpdir/sanity_checks_dummy_uploadtmpfile", "w");
  75              if (! $fp) return array(
  76                  PHORUM_SANITY_CRIT,
  77                  "The system is unable to write files
  78                   to PHP's upload tmpdir \"".htmlspecialchars($tmpdir)."\".
  79                   The system error was:<br/><br/>".
  80                   htmlspecialchars($php_errormsg).".",
  81                  "Change the upload_tmp_dir setting in your php.ini file
  82                   or give your webserver more permissions for the current
  83                   upload directory."
  84              );
  85  
  86              fclose($fp);
  87              unlink("$tmpdir/sanity_checks_dummy_uploadtmpfile");
  88          }
  89  
  90          return array(PHORUM_SANITY_OK, NULL);
  91      }
  92  
  93      // ========================================================================
  94      // Helper functions
  95      // ========================================================================
  96  
  97      // We have to check multiple upload limits. Using this function,
  98      // we do not have to rebuild all error messages over and over
  99      // again.
 100      function phorum_single_check_upload_limits ($howmuch, $what, $maxphp, $maxdb)
 101      {
 102          // Check PHP limits.
 103          if (!empty($maxphp) && $howmuch > $maxphp) return array(
 104              PHORUM_SANITY_WARN,
 105              "You have configured ".htmlspecialchars($what)." to ".
 106               phorum_filesize($howmuch).". Your PHP installation only 
 107               supports ".phorum_filesize($maxphp).". Your users might
 108               have problems with uploading their files because of this.",
 109              "Raise the options post_max_size and upload_max_filesize in your
 110               php.ini file to match the Max File Size option or lower this
 111               configuration option for your forums."
 112          );
 113  
 114          // Check database limits.
 115          if (!empty($maxdb) && $howmuch > $maxdb) return array(
 116              PHORUM_SANITY_WARN,
 117              "You have configured ".htmlspecialchars($what)." to ".
 118               phorum_filesize($howmuch).". Your database only supports ".
 119               phorum_filesize($maxdb).". Your users might have problems with
 120               uploading their files because of this.",
 121              "Configure your database to allow larger packets or lower the
 122               Max File Size configuration option for your forums."
 123          );
 124  
 125          return NULL;
 126      }
 127  
 128  ?>