Enano CMS (1.1.x): comparison plugins/SpecialUpdownload.php~

equal deleted inserted replaced

--1:000000000000
+:902822492a68
+<?php
+/*
+Plugin Name: Upload/download frontend
+Plugin URI: http://enano.homelinux.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 Fuhry
+Version: 1.0
+Author URI: http://enano.homelinux.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>');
+elseif( 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 $fs.' bytes';
+$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;
+}
+?>