<?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 . '";');

	}

		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);

	exit;

}

?>