<?php
/**!info**
{
"Plugin Name" : "plugin_specialupdownload_title",
"Plugin URI" : "http://enanocms.org/",
"Description" : "plugin_specialupdownload_desc",
"Author" : "Dan Fuhry",
"Version" : "1.1.6",
"Author URI" : "http://enanocms.org/"
}
**!*/
/*
* Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
* Copyright (C) 2006-2009 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('session_started', 'SpecialUpDownload_paths_init();');
function SpecialUpDownload_paths_init()
{
register_special_page('UploadFile', 'specialpage_upload_file');
register_special_page('DownloadFile', 'specialpage_download_file');
}
function page_Special_UploadFile()
{
global $db, $session, $paths, $template, $plugins; // Common objects
global $lang;
global $cache;
global $mime_types;
if(getConfig('enable_uploads')!='1') { die_friendly($lang->get('etc_access_denied_short'), '<p>' . $lang->get('upload_err_disabled_site') . '</p>'); }
if ( !$session->get_permissions('upload_files') )
{
die_friendly($lang->get('etc_access_denied_short'), '<p>' . $lang->get('upload_err_disabled_acl') . '</p>');
}
if(isset($_POST['doit']))
{
if(isset($_FILES['data']))
{
$file =& $_FILES['data'];
}
else
{
$file = false;
}
if ( !is_array($file) )
{
die_friendly($lang->get('upload_err_title'), '<p>' . $lang->get('upload_err_cant_get_file_meta') . '</p>');
}
if ( $file['size'] == 0 || $file['size'] > (int)getConfig('max_file_size', '256000') )
{
die_friendly($lang->get('upload_err_title'), '<p>' . $lang->get('upload_err_too_big_or_small') . '</p>');
}
$types = fetch_allowed_extensions();
$ext = strtolower(substr($file['name'], strrpos($file['name'], '.')+1, strlen($file['name'])));
if ( !isset($types[$ext]) || ( isset($types[$ext]) && !$types[$ext] ) )
{
die_friendly($lang->get('upload_err_title'), '<p>' . $lang->get('upload_err_banned_ext', array('ext' => htmlspecialchars($ext))) . '</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', $filename))
{
die_friendly($lang->get('upload_err_title'), '<p>' . $lang->get('upload_err_banned_chars') . '</p>');
}
}
$ns = namespace_factory($filename, 'File');
$cdata = $ns->get_cdata();
$is_protected = $cdata['really_protected'];
if ( isPage($paths->get_pathskey($filename, 'File')) && !isset ( $_POST['update'] ) )
{
$upload_link = makeUrlNS('Special', 'UploadFile/'.$filename);
die_friendly($lang->get('upload_err_title'), '<p>' . $lang->get('upload_err_already_exists', array('upload_link' => $upload_link)) . '</p>');
}
else if ( isset($_POST['update']) && $is_protected )
{
die_friendly($lang->get('upload_err_title'), '<p>' . $lang->get('upload_err_replace_protected') . '</p>');
}
$utime = time();
$filename = $db->escape(sanitize_page_id($filename));
$ext = substr($filename, strrpos($filename, '.'), strlen($filename));
$flen = filesize($file['tmp_name']);
$perms = $session->fetch_page_acl($filename, 'File');
$comments = ( isset($_POST['update']) ) ? $db->escape($_POST['comments']) : $db->escape(RenderMan::preprocess_text($_POST['comments'], false, false, true, $perms));
$chartag = sha1(microtime());
$urln = str_replace(' ', '_', $filename);
$key = md5($filename . '_' . ( function_exists('md5_file') ? md5_file($file['tmp_name']) : file_get_contents($file['tmp_name'])));
$targetname = ENANO_ROOT . '/files/' . $key . $ext;
if(!@move_uploaded_file($file['tmp_name'], $targetname))
{
die_friendly($lang->get('upload_err_title'), '<p>' . $lang->get('upload_err_move_failed') . '</p>');
}
if(getConfig('file_history') != '1')
{
if(!$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(!$db->sql_query('INSERT INTO '.table_prefix.'logs(time_id,date_string,log_type,action,author,author_uid,page_id,namespace) VALUES('.$utime.', \''.enano_date(ED_DATE | ED_TIME).'\', \'page\', \'create\', \''.$session->username.'\',' . $session->user_id . ', \''.$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,author_uid,page_id,namespace,edit_summary) VALUES('.$utime.', \''.enano_date(ED_DATE | ED_TIME).'\', \'page\', \'reupload\', \''.$session->username.'\',' . $session->user_id . ', \''.$filename.'\', \''.'File'.'\', \''.$comments.'\');')) $db->_die('The page log could not be updated.');
}
$cache->purge('page_meta');
die_friendly($lang->get('upload_success_title'), '<p>' . $lang->get('upload_success_body', array('file_link' => makeUrlNS('File', $filename))) . '</p>');
}
else
{
$template->header();
$fn = $paths->getParam(0);
if ( $fn && !$session->get_permissions('upload_new_version') )
{
die_friendly($lang->get('etc_access_denied_short'), '<p>' . $lang->get('upload_err_replace_denied') . '<p>');
}
?>
<p><?php echo $lang->get('upload_intro'); ?></p>
<p><?php
// Get the max file size, and format it in a way that is user-friendly
$fs = getConfig('max_file_size', '256000');
$fs = (int)$fs;
if($fs >= 1048576)
{
$fs = round($fs / 1048576, 1);
$unitized = $fs . ' ' . $lang->get('etc_unit_megabytes_short');
}
elseif($fs >= 1024)
{
$fs = round($fs / 1024, 1);
$unitized = $fs . ' ' . $lang->get('etc_unit_kilobytes_short');
}
echo $lang->get('upload_max_filesize', array(
'size' => $unitized
));
?></p>
<form action="<?php echo makeUrl($paths->page); ?>" method="post" enctype="multipart/form-data">
<table border="0" cellspacing="1" cellpadding="4">
<tr><td><?php echo $lang->get('upload_field_file'); ?></td><td><input name="data" type="file" size="40" /></td></tr>
<tr><td><?php echo $lang->get('upload_field_renameto'); ?></td><td><input name="rename" type="text" size="40"<?php if($fn) echo ' value="'.$fn.'" readonly="readonly"'; ?> /></td></tr>
<?php
if(!$fn) echo '<tr><td>' . $lang->get('upload_field_comments') . '</td><td><textarea name="comments" rows="20" cols="60"></textarea></td></tr>';
else echo '<tr><td>' . $lang->get('upload_field_reason') . '</td><td><input name="comments" size="50" /></td></tr>';
?>
<tr><td colspan="2" style="text-align: center">
<?php
if($fn)
echo '<input type="hidden" name="update" value="true" />';
?>
<input type="submit" name="doit" value="<?php echo $lang->get('upload_btn_upload'); ?>" />
</td></tr>
</table>
</form>
<?php
$template->footer();
}
}
function page_Special_DownloadFile()
{
global $db, $session, $paths, $template, $plugins; // Common objects
global $lang;
global $do_gzip;
$filename = $paths->getParam(0);
$timeid = $paths->getParam(1);
if ( $timeid && ctype_digit((string)$timeid) )
{
$tid = ' AND time_id='.$timeid;
}
else
{
$tid = '';
}
$filename = $db->escape(sanitize_page_id($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 ( $db->numrows() < 1 )
{
header('HTTP/1.1 404 Not Found');
die_friendly($lang->get('upload_err_not_found_title'), '<p>' . $lang->get('upload_err_not_found_body', array('filename' => htmlspecialchars($filename))) . '</p>');
}
$row = $db->fetchrow();
$db->free_result();
// Check permissions
$perms = $session->fetch_page_acl($row['page_id'], 'File');
if ( !$perms->get_permissions('read') )
{
die_friendly($lang->get('etc_access_denied_short'), '<p>' . $lang->get('etc_access_denied') . '</p>');
}
$fname = ENANO_ROOT . '/files/' . $row['file_key'] . $row['file_extension'];
if ( !file_exists($fname) )
{
$fname = ENANO_ROOT . '/files/' . $row['file_key'] . '_' . $row['time_id'] . $row['file_extension'];
}
if ( !file_exists($fname) )
{
die("Uploaded file $fname not found.");
}
if ( isset($_GET['preview']) && substr($row['mimetype'], 0, 6) == 'image/' )
{
// Determine appropriate width and height
$width = ( isset($_GET['width']) ) ? intval($_GET['width'] ) : 320;
$height = ( isset($_GET['height']) ) ? intval($_GET['height']) : 320;
// 1.1.7: allow different format output
$extension = $row['file_extension'];
if ( isset($_GET['fmt']) && in_array($_GET['fmt'], array('png', 'jpg')) )
$extension = ".{$_GET['fmt']}";
$cache_filename = ENANO_ROOT . "/cache/{$filename}-{$row['time_id']}-{$width}x{$height}$extension";
if ( file_exists($cache_filename) )
{
$fname = $cache_filename;
}
else
{
$allow_scale = false;
$orig_fname = $fname;
// is caching enabled?
if ( getConfig('cache_thumbs') == '1' )
{
$fname = $cache_filename;
if ( is_writeable(dirname($fname)) )
{
$allow_scale = true;
}
}
else
{
// Get a temporary file
// In this case, the file will not be cached and will be scaled each time it's requested
$temp_dir = sys_get_temp_dir();
// if tempnam() cannot use the specified directory name, it will fall back on the system default
$tempname = tempnam($temp_dir, $filename);
if ( $tempname && is_writeable($tempname) )
{
$allow_scale = true;
}
}
if ( $allow_scale )
{
$result = scale_image($orig_fname, $fname, $width, $height);
if ( !$result )
$fname = $orig_fname;
}
else
{
$fname = $orig_fname;
}
}
}
$handle = @fopen($fname, 'r');
if ( !$handle )
die('Can\'t open output file for reading');
$len = filesize($fname);
header('Content-type: '.$row['mimetype']);
if ( isset($_GET['download']) )
{
header('Content-disposition: attachment, filename="' . $filename . '";');
}
if ( !@$GLOBALS['do_gzip'] )
header('Content-length: ' . $len);
header('Last-Modified: '.enano_date('r', $row['time_id']));
// using this method limits RAM consumption
while ( !feof($handle) )
{
echo fread($handle, 512000);
}
fclose($handle);
gzip_output();
exit;
}
?>