<?php/*Plugin Name: Upload/download frontendPlugin URI: http://enanocms.org/Description: Provides the pages Special:UploadFile and Special:DownloadFile. UploadFile is used to upload files to the site, and DownloadFile fetches the file from the database, creates thumbnails if necessary, and sends the file to the user.Author: Dan FuhryVersion: 1.0Author URI: http://enanocms.org/*//* * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between * Version 1.0 release candidate 2 * Copyright (C) 2006-2007 Dan Fuhry * SpecialUpdownload.php - handles uploading and downloading of user-uploaded files - possibly the most rigorously security-enforcing script in all of Enano, although sessions.php comes in a close second * * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. * * 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. See the GNU General Public License for details. */global $db, $session, $paths, $template, $plugins; // Common objects$plugins->attachHook('base_classes_initted', ' global $paths; $paths->add_page(Array( \'name\'=>\'Upload file\', \'urlname\'=>\'UploadFile\', \'namespace\'=>\'Special\', \'special\'=>0,\'visible\'=>1,\'comments_on\'=>0,\'protected\'=>1,\'delvotes\'=>0,\'delvote_ips\'=>\'\', )); $paths->add_page(Array( \'name\'=>\'Download file\', \'urlname\'=>\'DownloadFile\', \'namespace\'=>\'Special\', \'special\'=>0,\'visible\'=>0,\'comments_on\'=>0,\'protected\'=>1,\'delvotes\'=>0,\'delvote_ips\'=>\'\', )); ');function page_Special_UploadFile(){ global $db, $session, $paths, $template, $plugins; // Common objects global $mime_types; if(getConfig('enable_uploads')!='1') { die_friendly('Access denied', '<p>File uploads are disabled this website.</p>'); } if ( !$session->get_permissions('upload_files') ) { die_friendly('Access denied', '<p>File uploads are disabled for your user account or group.<p>'); } if(isset($_POST['doit'])) { if(isset($_FILES['data'])) { $file =& $_FILES['data']; } else { $file = false; } if(!is_array($file)) die_friendly('Upload failed', '<p>The server could not retrieve the array $_FILES[\'data\'].</p>'); if($file['size'] == 0 || $file['size'] > (int)getConfig('max_file_size')) die_friendly('Upload failed', '<p>The file you uploaded is either too large or 0 bytes in length.</p>'); /* $allowed_mime_types = Array( 'text/plain', 'image/png', 'image/jpeg', 'image/tiff', 'image/gif', 'text/html', // Safe because the file is stashed in the database 'application/x-bzip2', 'application/x-gzip', 'text/x-c++' ); if(function_exists('finfo_open') && $fi = finfo_open(FILEINFO_MIME, ENANO_ROOT.'/includes/magic')) // First try to use the fileinfo extension, this is the best way to determine the mimetype { if(!$fi) die_friendly('Upload failed', '<p>Enano was unable to determine the format of the uploaded file.</p><p>'.@finfo_file($fi, $file['tmp_name']).'</p>'); $type = @finfo_file($fi, $file['tmp_name']); @finfo_close($fi); } elseif(function_exists('mime_content_type')) $type = mime_content_type($file['tmp_name']); // OK, no fileinfo function. Use a (usually) built-in PHP function elseif(isset($file['type'])) $type = $file['type']; // LAST RESORT: use the mimetype the browser sent us, though this is likely to be spoofed else // DANG! Not even the browser told us. Bail out. die_friendly('Upload failed', '<p>Enano was unable to determine the format of the uploaded file.</p>'); */ $types = fetch_allowed_extensions(); $ext = substr($file['name'], strrpos($file['name'], '.')+1, strlen($file['name'])); if(!isset($types[$ext]) || ( isset($types[$ext]) && !$types[$ext] ) ) { die_friendly('Upload failed', '<p>The file type ".'.$ext.'" is not allowed.</p>'); } $type = $mime_types[$ext]; //$type = explode(';', $type); $type = $type[0]; //if(!in_array($type, $allowed_mime_types)) die_friendly('Upload failed', '<p>The file type "'.$type.'" is not allowed.</p>'); if($_POST['rename'] != '') { $filename = $_POST['rename']; } else { $filename = $file['name']; } $bad_chars = Array(':', '\\', '/', '<', '>', '|', '*', '?', '"', '#', '+'); foreach($bad_chars as $ch) { if(strstr($filename, $ch) || preg_match('/^([ ]+)$/is', $filename)) die_friendly('Upload failed', '<p>The filename contains invalid characters.</p>'); } if ( isset ( $paths->pages[ $paths->nslist['File'] . $filename ] ) && !isset ( $_POST['update'] ) ) { die_friendly('Upload failed', '<p>The file already exists. You can <a href="'.makeUrlNS('Special', 'UploadFile/'.$filename).'">upload a new version of this file</a>.</p>'); } else if ( isset($_POST['update']) && ( !isset($paths->pages[$paths->nslist['File'].$filename]) || (isset($paths->pages[$paths->nslist['File'].$filename]) && $paths->pages[$paths->nslist['File'].$filename]['protected'] == 1 ) ) ) { die_friendly('Upload failed', '<p>Either the file does not exist (and therefore cannot be updated) or the file is protected.</p>'); } $utime = time(); $filename = $db->escape($filename); $ext = substr($filename, strrpos($filename, '.'), strlen($filename)); $flen = filesize($file['tmp_name']); $comments = $db->escape(RenderMan::strip_php($_POST['comments'])); $chartag = sha1(microtime()); $urln = str_replace(' ', '_', $filename); $key = md5($filename . '_' . file_get_contents($file['tmp_name'])); $targetname = ENANO_ROOT . '/files/' . $key . '_' . $utime . $ext; if(!@move_uploaded_file($file['tmp_name'], $targetname)) { die_friendly('Upload failed', '<p>Could not move uploaded file to the new location.</p>'); } if(getConfig('file_history') != '1') { if(!$db->sql_query('DELETE FROM '.table_prefix.'files WHERE filename=\''.$filename.'\' LIMIT 1;')) $db->_die('The old file data could not be deleted.'); } if(!$db->sql_query('INSERT INTO '.table_prefix.'files(time_id,page_id,filename,size,mimetype,file_extension,file_key) VALUES('.$utime.', \''.$urln.'\', \''.$filename.'\', '.$flen.', \''.$type.'\', \''.$ext.'\', \''.$key.'\')')) $db->_die('The file data entry could not be inserted.'); if(!isset($_POST['update'])) { if(!$db->sql_query('INSERT INTO '.table_prefix.'logs(time_id,date_string,log_type,action,author,page_id,namespace) VALUES('.$utime.', \''.date('d M Y h:i a').'\', \'page\', \'create\', \''.$session->username.'\', \''.$filename.'\', \''.'File'.'\');')) $db->_die('The page log could not be updated.'); if(!$db->sql_query('INSERT INTO '.table_prefix.'pages(name,urlname,namespace,protected,delvotes,delvote_ips) VALUES(\''.$filename.'\', \''.$urln.'\', \'File\', 0, 0, \'\')')) $db->_die('The page listing entry could not be inserted.'); if(!$db->sql_query('INSERT INTO '.table_prefix.'page_text(page_id,namespace,page_text,char_tag) VALUES(\''.$urln.'\', \'File\', \''.$comments.'\', \''.$chartag.'\')')) $db->_die('The page text entry could not be inserted.'); } else { if(!$db->sql_query('INSERT INTO '.table_prefix.'logs(time_id,date_string,log_type,action,author,page_id,namespace,edit_summary) VALUES('.$utime.', \''.date('d M Y h:i a').'\', \'page\', \'reupload\', \''.$session->username.'\', \''.$filename.'\', \''.'File'.'\', \''.$comments.'\');')) $db->_die('The page log could not be updated.'); } die_friendly('Upload complete', '<p>Your file has been uploaded successfully. View the <a href="'.makeUrlNS('File', $filename).'">file\'s page</a>.</p>'); } else { $template->header(); $fn = $paths->getParam(0); if ( $fn && !$session->get_permissions('upload_new_version') ) { die_friendly('Access denied', '<p>Uploading new versions of files has been disabled for your user account or group.<p>'); } ?> <p>Using this form you can upload a file to the <?php echo getConfig('site_name'); ?> site.</p> <p>The maximum file size is <?php // Get the max file size, and format it in a way that is user-friendly $fs = getConfig('max_file_size'); echo commatize($fs).' bytes'; $fs = (int)$fs; if($fs >= 1048576) { $fs = round($fs / 1048576, 1); echo ' ('.$fs.' MB)'; } elseif($fs >= 1024) { $fs = round($fs / 1024, 1); echo ' ('.$fs.' KB)'; } ?>.</p> <form action="<?php echo makeUrl($paths->page); ?>" method="post" enctype="multipart/form-data"> <table border="0" cellspacing="1" cellpadding="4"> <tr><td>File:</td><td><input name="data" type="file" size="40" /></td></tr> <tr><td>Rename to:</td><td><input name="rename" type="text" size="40"<?php if($fn) echo ' value="'.$fn.'" readonly="readonly"'; ?> /></td></tr> <?php if(!$fn) echo '<tr><td>Comments:<br />(can be wiki-formatted)</td><td><textarea name="comments" rows="20" cols="60"></textarea></td></tr>'; else echo '<tr><td>Reason for uploading the new version: </td><td><input name="comments" size="50" /></td></tr>'; ?> <tr><td colspan="2" style="text-align: center"> <?php if($fn) echo '<input type="hidden" name="update" value="true" />'; ?> <input type="submit" name="doit" value="Upload file" /> </td></tr> </table> </form> <?php $template->footer(); }} function page_Special_DownloadFile(){ global $db, $session, $paths, $template, $plugins; // Common objects global $do_gzip; $filename = rawurldecode($paths->getParam(0)); $timeid = $paths->getParam(1); if($timeid && preg_match('#^([0-9]+)$#', (string)$timeid)) $tid = ' AND time_id='.$timeid; else $tid = ''; $filename = $db->escape($filename); $q = $db->sql_query('SELECT page_id,size,mimetype,time_id,file_extension,file_key FROM '.table_prefix.'files WHERE filename=\''.$filename.'\''.$tid.' ORDER BY time_id DESC;'); if(!$q) $db->_die('The file data could not be selected.'); if($db->numrows() < 1) { header('HTTP/1.1 404 Not Found'); die_friendly('File not found', '<p>The file "'.$filename.'" cannot be found.</p>'); } $row = $db->fetchrow(); $db->free_result(); // Check permissions $perms = $session->fetch_page_acl($row['page_id'], 'File'); if ( !$perms->get_permissions('read') ) { die_friendly('Access denied', '<p>Access to the specified file is denied.</p>'); } $fname = ENANO_ROOT . '/files/' . $row['file_key'] . '_' . $row['time_id'] . $row['file_extension']; $data = file_get_contents($fname); if(isset($_GET['preview']) && getConfig('enable_imagemagick')=='1' && file_exists(getConfig('imagemagick_path')) && substr($row['mimetype'], 0, 6) == 'image/') { $nam = tempnam('/tmp', $filename); $h = @fopen($nam, 'w'); if(!$h) die('Error opening '.$nam.' for writing'); fwrite($h, $data); fclose($h); /* Make sure the request doesn't contain commandline injection - yow! */ if(!isset($_GET['width' ]) || (isset($_GET['width'] ) && !preg_match('#^([0-9]+)$#', $_GET['width'] ))) $width = '320'; else $width = $_GET['width' ]; if(!isset($_GET['height']) || (isset($_GET['height']) && !preg_match('#^([0-9]+)$#', $_GET['height'] ))) $height = '240'; else $height = $_GET['height']; $cache_filename=ENANO_ROOT.'/cache/'.$filename.'-'.$row['time_id'].'-'.$width.'x'.$height.$row['file_extension']; if(getConfig('cache_thumbs')=='1' && file_exists($cache_filename) && is_writable(ENANO_ROOT.'/cache')) { $data = file_get_contents($cache_filename); } elseif(getConfig('enable_imagemagick')=='1' && file_exists(getConfig('imagemagick_path'))) { // Use ImageMagick to convert the image //unlink($nam); error_reporting(E_ALL); $cmd = ''.getConfig('imagemagick_path').' "'.$nam.'" -resize "'.$width.'x'.$height.'>" "'.$nam.'.scaled'.$row['file_extension'].'"'; system($cmd, $stat); if(!file_exists($nam.'.scaled'.$row['file_extension'])) die('Failed to call ImageMagick (return value '.$stat.'), command line was:<br />'.$cmd); $data = file_get_contents($nam.'.scaled'.$row['file_extension']); // Be stingy about it - better to re-generate the image hundreds of times than to fail completely if(getConfig('cache_thumbs')=='1' && !file_exists($cache_filename)) { // Write the generated thumbnail to the cache directory $h = @fopen($cache_filename, 'w'); if(!$h) die('Error opening cache file "'.$cache_filename.'" for writing.'); fwrite($h, $data); fclose($h); } } unlink($nam); } $len = strlen($data); header('Content-type: '.$row['mimetype']); if(isset($_GET['download'])) header('Content-disposition: attachment, filename="'.$filename.'";'); header('Content-length: '.$len); header('Last-Modified: '.date('r', $row['time_id'])); echo($data); // // Compress buffered output if required and send to browser // if ( $do_gzip ) { // // Copied from phpBB, which was in turn borrowed from php.net // $gzip_contents = ob_get_contents(); ob_end_clean(); $gzip_size = strlen($gzip_contents); $gzip_crc = crc32($gzip_contents); $gzip_contents = gzcompress($gzip_contents, 9); $gzip_contents = substr($gzip_contents, 0, strlen($gzip_contents) - 4); header('Content-encoding: gzip'); echo "\x1f\x8b\x08\x00\x00\x00\x00\x00"; echo $gzip_contents; echo pack('V', $gzip_crc); echo pack('V', $gzip_size); } exit;}?>