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| <?php |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // // |
| // Copyright (C) 2006 Phorum Development Team // |
| // http://www.phorum.org // |
| // // |
| // This program is free software. You can redistribute it and/or modify // |
| // it under the terms of either the current Phorum License (viewable at // |
| // phorum.org) or the Phorum License that was distributed with this file // |
| // // |
| // This program 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. // |
| // // |
| // You should have received a copy of the Phorum License // |
| // along with this program. // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| // Check if the Phorum file uploading settings match the |
| // limits that are imposed by the system. |
| |
| // TODO (document in faq / documentation) |
| // The upload size can be limited by Apache's LimitRequestBody directive, |
| // but we cannot check that one from PHP. |
| |
| require_once('./include/format_functions.php'); // For phorum_filesize() |
| |
| $phorum_check = "File uploading (personal files and attachments)"; |
| |
| function phorum_check_upload_limits() { |
| $PHORUM = $GLOBALS["PHORUM"]; |
| |
| // Keep track if uploads are used. |
| $upload_used = false; |
| |
| // Get the maximum file upload size for PHP. |
| $php_max_upload = phorum_php_max_upload(); |
| |
| // Get the maximum packet size for the database. |
| // For determining the maximum allowed upload size, |
| // we have to take packet overhead into account. |
| $max_packetsize = phorum_db_maxpacketsize(); |
| if ($max_packetsize == NULL) { |
| $db_max_upload = $php_max_upload; |
| } else { |
| $db_max_upload = phorum_db_maxpacketsize() * 0.6; |
| } |
| |
| // Check limits for file uploading in personal profile. |
| if ($PHORUM["file_uploads"] && $PHORUM["max_file_size"]) { |
| $upload_used = true; |
| $res = phorum_single_check_upload_limits( |
| $PHORUM["max_file_size"]*1024, |
| "the Max File Size option for user file uploads " . |
| "(in their profile)", |
| $php_max_upload, $db_max_upload |
| ); |
| if ($res != NULL) return $res; |
| } |
| |
| // Check limits for attachment uploading in forums. |
| $forums = phorum_db_get_forums(); |
| foreach ($forums as $id => $forum) { |
| if ($forum["max_attachments"] > 0 && $forum["max_attachment_size"]) { |
| $upload_used = true; |
| $res = phorum_single_check_upload_limits( |
| $forum["max_attachment_size"]*1024, |
| "the Max File Size option for uploading attachments |
| in the forum \"{$forum['name']}\"", |
| $php_max_upload, $db_max_upload |
| ); |
| } |
| } |
| |
| // No upload functionality found so far? Then we're done. |
| if (! $upload_used) return array(PHORUM_SANITY_OK, NULL); |
| |
| // Check if the upload temp directory can be written. |
| $tmpdir = get_cfg_var('upload_tmp_dir'); |
| if (!empty($tmpdir)) { |
| $fp = @fopen("$tmpdir/sanity_checks_dummy_uploadtmpfile", "w"); |
| if (! $fp) return array( |
| PHORUM_SANITY_CRIT, |
| "The system is unable to write files |
| to PHP's upload tmpdir \"".htmlspecialchars($tmpdir)."\". |
| The system error was:<br/><br/>". |
| htmlspecialchars($php_errormsg).".", |
| "Change the upload_tmp_dir setting in your php.ini file |
| or give your webserver more permissions for the current |
| upload directory." |
| ); |
| } |
| fclose($fp); |
| unlink("$tmpdir/sanity_checks_dummy_uploadtmpfile"); |
| |
| return array(PHORUM_SANITY_OK, NULL); |
| } |
| |
| // ======================================================================== |
| // Helper functions |
| // ======================================================================== |
| |
| // We have to check multiple upload limits. Using this function, |
| // we do not have to rebuild all error messages over and over |
| // again. |
| function phorum_single_check_upload_limits ($howmuch, $what, $maxphp, $maxdb) |
| { |
| // Check PHP limits. |
| if (!empty($maxphp) && $howmuch > $maxphp) return array( |
| PHORUM_SANITY_WARN, |
| "You have configured ".htmlspecialchars($what)." to ". |
| phorum_filesize($howmuch).". Your PHP installation only |
| supports ".phorum_filesize($maxphp).". Your users might |
| have problems with uploading their files because of this.", |
| "Raise the options post_max_size and upload_max_filesize in your |
| php.ini file to match the Max File Size option or lower this |
| configuration option for your forums." |
| ); |
| |
| // Check database limits. |
| if (!empty($maxdb) && $howmuch > $maxdb) return array( |
| PHORUM_SANITY_WARN, |
| "You have configured ".htmlspecialchars($what)." to ". |
| phorum_filesize($howmuch).". Your database only supports ". |
| phorum_filesize($maxdb).". Your users might have problems with |
| uploading their files because of this.", |
| "Configure your database to allow larger packets or lower the |
| Max File Size configuration option for your forums." |
| ); |
| |
| return NULL; |
| } |
| |
| function phorum_php_max_upload() |
| { |
| // Determine the PHP system upload limit. The limit for |
| // maximum upload filesize is not the only thing we |
| // have to look at. We should also take the maximum |
| // POST size in account. |
| $pms = phorum_phpcfgsize2bytes(get_cfg_var('post_max_size')); |
| $umf = phorum_phpcfgsize2bytes(get_cfg_var('upload_max_filesize')); |
| $limit = ($umf > $pms ? $pms : $umf); |
| |
| return $limit; |
| } |
| |
| // Convert the size parameters that can be used in the |
| // PHP ini-file (e.g. 1024, 10k, 8M) to a number of bytes. |
| function phorum_phpcfgsize2bytes($val) { |
| $val = trim($val); |
| $last = strtolower($val{strlen($val)-1}); |
| switch($last) { |
| // The 'G' modifier is available since PHP 5.1.0 |
| case 'g': |
| $val *= 1024; |
| case 'm': |
| $val *= 1024; |
| case 'k': |
| $val *= 1024; |
| } |
| return $val; |
| } |
| ?> |