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<?php
/*
* Copyright 2009-2010 Florian "Bluewind" Pritz <bluewind@server-speed.net>
*
* Licensed under GPLv3
* (see COPYING for full license text)
*
*/
class File_mod extends Model {
function __construct()
{
parent::Model();
}
// Returns an unused ID
// TODO: make threadsafe
function new_id()
{
$id = $this->random_id(3,6);
if ($this->id_exists($id) || $id == 'file') {
return $this->new_id();
} else {
return $id;
}
}
function id_exists($id)
{
if(!$id) {
return false;
}
$sql = '
SELECT id
FROM `files`
WHERE `id` = ?
LIMIT 1';
$query = $this->db->query($sql, array($id));
if ($query->num_rows() == 1) {
return true;
} else {
return false;
}
}
function get_filedata($id)
{
$sql = '
SELECT hash,filename,mimetype
FROM `files`
WHERE `id` = ?
LIMIT 1';
$query = $this->db->query($sql, array($id));
if ($query->num_rows() == 1) {
$return = $query->result_array();
return $return[0];
} else {
return false;
}
}
// return the folder in which the file with $hash is stored
function folder($hash) {
return $this->config->item('upload_path').'/'.substr($hash, 0, 3);
}
// Returns the full path to the file with $hash
function file($hash) {
return $this->folder($hash).'/'.$hash;
}
function hash_password($password)
{
return sha1($this->config->item('passwordsalt').$password);
}
// Returns the password submitted by the user
function get_password()
{
$password = $this->input->post('password');
if ($password !== false) {
return $this->hash_password($password);
} elseif (isset($_SERVER['PHP_AUTH_PW']) && $_SERVER['PHP_AUTH_PW'] != '') {
return $this->hash_password($_SERVER['PHP_AUTH_PW']);
}
return 'NULL';
}
// Add a hash to the DB
// TODO: Should only update not insert; see new_id()
function add_file($hash, $id, $filename)
{
$mimetype = exec(FCPATH.'scripts/mimetype -b --orig-name '.escapeshellarg($filename).' '.escapeshellarg($this->file($hash)));
$query = $this->db->query('
INSERT INTO `files` (`hash`, `id`, `filename`, `password`, `date`, `mimetype`)
VALUES (?, ?, ?, ?, ?, ?)',
array($hash, $id, $filename, $this->get_password(), time(), $mimetype));
}
function show_url($id, $mode)
{
$data = array();
$redirect = false;
if ($mode) {
$data['url'] = site_url($id).'/'.$mode;
} else {
$data['url'] = site_url($id).'/';
$filedata = $this->get_filedata($id);
$file = $this->file($filedata['hash']);
$type = $filedata['mimetype'] ? $filedata['mimetype'] : exec(FCPATH.'scripts/mimetype -b --orig-name '.escapeshellarg($filedata['filename']).' '.escapeshellarg($file));
$mode = $this->mime2extension($type);
$mode = $this->filename2extension($filedata['filename']) ? $this->filename2extension($filedata['filename']) : $mode;
// If we detected a highlightable file redirect,
// otherwise show the URL because browsers would just show a DL dialog
if ($mode) {
$redirect = true;
}
}
if ($this->var->cli_client) {
echo $data['url']."\n";
} else {
if ($redirect) {
redirect($data['url']);
} else {
$this->load->view('file/header', $data);
$this->load->view('file/show_url', $data);
$this->load->view('file/footer', $data);
}
}
}
// download a given ID
// TODO: make smaller
function download()
{
$data = array();
$id = $this->uri->segment(1);
$mode = $this->uri->segment(2);
$filedata = $this->get_filedata($id);
$file = $this->file($filedata['hash']);
if ($this->id_exists($id) && file_exists($file)) {
// MODIFIED SINCE SUPPORT -- START
// helps to keep traffic low when reloading an image
$filedate = filectime($file);
$etag = strtolower(md5_file($file));
$modified = true;
// No need to check because different files have different IDs/hashes
if(isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
$modified = false;
}
if(isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
$oldtag = trim(strtolower($_SERVER['HTTP_IF_NONE_MATCH']), '"');
if($oldtag == $etag) {
$modified = false;
} else {
$modified = true;
}
}
// MODIFIED SINCE SUPPORT -- END
if (!$modified) {
header("HTTP/1.1 304 Not Modified");
header('Etag: "'.$etag.'"');
} else {
$type = $filedata['mimetype'] ? $filedata['mimetype'] : exec(FCPATH.'scripts/mimetype -b --orig-name '.escapeshellarg($filedata['filename']).' '.escapeshellarg($file));
// /$mode at the end of the URL overwrites autodetection
if (!$mode && substr_count(ltrim($this->uri->uri_string(), "/"), '/') >= 1) {
$mode = $this->mime2extension($type);
$mode = $this->filename2extension($filedata['filename']) ? $this->filename2extension($filedata['filename']) : $mode;
}
// TODO: cleanup conditions
if ($mode && $mode != 'plain' && $mode != 'qr'
&& $this->mime2extension($type)
&& filesize($file) <= $this->config->item('upload_max_text_size')
) {
$data['title'] = $filedata['filename'];
$data['raw_link'] = site_url($id);
$data['plain_link'] = site_url($id.'/plain');
$data['auto_link'] = site_url($id).'/';
$data['rmd_link'] = site_url($id.'/rmd');
header("Content-Type: text/html\n");
if ($mode) {
$data['current_highlight'] = $mode;
} else {
$data['current_highlight'] = $this->mime2extension($type);
}
echo $this->load->view('file/html_header', $data, true);
$this->load->library("MemcacheLibrary");
if (! $cached = $this->memcachelibrary->get($filedata['hash'].'_'.$mode)) {
ob_start();
if ($mode == "rmd") {
echo '<td class="markdownrender">'."\n";
passthru('/usr/bin/perl /usr/bin/perlbin/vendor/Markdown.pl '.escapeshellarg($file));
} else {
echo '<td class="numbers"><pre>';
// generate line numbers (links)
passthru('/usr/bin/perl -ne \'print "<a href=\"#n$.\" class=\"no\" id=\"n$.\" name=\"n$.\">$.</a>\n"\' '.escapeshellarg($file));
echo '</pre></td><td class="code">'."\n";
$this->load->library('geshi');
$this->geshi->initialize(array('set_language' => $mode, 'set_source' => file_get_contents($file), 'enable_classes' => 'true'));
echo $this->geshi->output();
}
$cached = ob_get_contents();
ob_end_clean();
$this->memcachelibrary->set($filedata['hash'].'_'.$mode, $cached, 100);
}
echo $cached;
echo $this->load->view('file/html_footer', $data, true);
} else {
if ($mode == 'plain') {
header("Content-Type: text/plain\n");
} elseif ($mode == "qr") {
header("Content-disposition: inline; filename=\"".$id."_qr.png\"\n");
header("Content-Type: image/png\n");
passthru('/usr/bin/qrencode -s 10 -o - '.escapeshellarg(site_url($id).'/'));
exit();
} else {
header("Content-Type: ".$type."\n");
}
header("Content-disposition: inline; filename=\"".$filedata['filename']."\"\n");
header("Content-Length: ".filesize($file)."\n");
header("Last-Modified: ".date('D, d M Y H:i:s', $filedate)." GMT");
header('Etag: "'.$etag.'"');
$fp = fopen($file,"r");
while (!feof($fp)) {
echo fread($fp,4096);
}
fclose($fp);
}
}
exit();
} else {
// TODO: remove -controller function has been removed
$this->load->view('file/header');
$this->load->view('file/non_existant');
$this->load->view('file/footer');
}
}
private function unused_file($hash)
{
$sql = '
SELECT id
FROM `files`
WHERE `hash` = ?
LIMIT 1';
$query = $this->db->query($sql, array($hash));
if ($query->num_rows() == 0) {
return true;
} else {
return false;
}
}
function delete_id($id, $password)
{
$filedata = $this->get_filedata($id);
$password = $this->get_password();
if ($password == "NULL") {
return false;
}
if(!$this->id_exists($id)) {
return false;
}
$sql = '
DELETE
FROM `files`
WHERE `id` = ?
AND password = ?
LIMIT 1';
$this->db->query($sql, array($id, $password));
if($this->id_exists($id)) {
return false;
}
if($this->unused_file($filedata['hash'])) {
unlink($this->file($filedata['hash']));
@rmdir($this->folder($filedata['hash']));
}
return true;
}
// Generate a random ID
private function random_id($min_length, $max_length)
{
$random = '';
$char_list = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$char_list .= "abcdefghijklmnopqrstuvwxyz";
$char_list .= "1234567890";
$length = rand()%($max_length-$min_length) + $min_length;
for($i = 0; $i < $max_length; $i++) {
if (strlen($random) == $length) break;
$random .= substr($char_list,(rand()%(strlen($char_list))), 1);
}
return $random;
}
// Map MIME types to extensions needed for highlighting
function mime2extension($type)
{
$typearray = array(
'text/plain' => 'text',
'text/x-python' => 'python',
'text/x-csrc' => 'c',
'text/x-chdr' => 'c',
'text/x-c++hdr' => 'c',
'text/x-c++src' => 'cpp',
'text/x-patch' => 'diff',
'text/x-lua' => 'lua',
'text/x-java' => 'java',
'text/x-haskell' => 'haskell',
'text/x-literate-haskell' => 'haskell',
'text/x-subviewer' => 'bash',
'text/x-makefile' => 'make',
#'text/x-log' => 'log',
'text/html' => 'html',
'text/css' => 'css',
'message/rfc822' => 'email',
#'image/svg+xml' => 'xml',
'application/x-perl' => 'perl',
'application/xml' => 'xml',
'application/javascript' => 'javascript',
'application/x-desktop' => 'text',
'application/x-m4' => 'text',
'application/x-awk' => 'text',
'application/x-java' => 'java',
'application/x-php' => 'php',
'application/x-ruby' => 'ruby',
'application/x-shellscript' => 'bash',
'application/x-x509-ca-cert' => 'text',
'application/mbox' => 'email',
'application/x-genesis-rom' => 'text'
);
if (array_key_exists($type, $typearray)) return $typearray[$type];
if (strpos($type, 'text/') === 0) return 'text';
# default
return false;
}
// Map special filenames to extensions
function filename2extension($name)
{
$namearray = array(
'PKGBUILD' => 'bash',
'.vimrc' => 'vim'
);
if (array_key_exists($name, $namearray)) return $namearray[$name];
return false;
}
}
# vim: set ts=2 sw=2 et:
/* End of file file_mod.php */
/* Location: ./system/application/models/file_mod.php */
|