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odfviewer.php
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odfviewer.php
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<?php
/**
* Open Document Viewer plugin
*
* Render Open Documents directly in the preview window
* by using the WebODF library by Tobias Hintze http://webodf.org/
*
* @version 0.2
* @author Thomas Bruederli <bruederli@kolabsys.com>
*
* Copyright (C) 2011, Kolab Systems AG
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class odfviewer extends rcube_plugin
{
public $task = 'mail|calendar|tasks|logout';
private $tempdir = 'plugins/odfviewer/files/';
private $tempbase = 'plugins/odfviewer/files/';
private $odf_mimetypes = array(
'application/vnd.oasis.opendocument.chart',
'application/vnd.oasis.opendocument.chart-template',
'application/vnd.oasis.opendocument.formula',
'application/vnd.oasis.opendocument.formula-template',
'application/vnd.oasis.opendocument.graphics',
'application/vnd.oasis.opendocument.graphics-template',
'application/vnd.oasis.opendocument.presentation',
'application/vnd.oasis.opendocument.presentation-template',
'application/vnd.oasis.opendocument.text',
'application/vnd.oasis.opendocument.text-master',
'application/vnd.oasis.opendocument.text-template',
'application/vnd.oasis.opendocument.spreadsheet',
'application/vnd.oasis.opendocument.spreadsheet-template',
);
function init()
{
$this->tempdir = $this->home . '/files/';
$this->tempbase = $this->urlbase . 'files/';
// webODF only supports IE9 or higher
$ua = new rcube_browser;
if ($ua->ie && $ua->ver < 9)
return;
// extend list of mimetypes that should open in preview
$rcmail = rcube::get_instance();
if ($rcmail->action == 'preview' || $rcmail->action == 'show' || $rcmail->task == 'calendar' || $rcmail->task == 'tasks') {
$mimetypes = (array)$rcmail->config->get('client_mimetypes');
$rcmail->config->set('client_mimetypes', array_merge($mimetypes, $this->odf_mimetypes));
}
$this->add_hook('message_part_get', array($this, 'get_part'));
$this->add_hook('session_destroy', array($this, 'session_cleanup'));
}
/**
* Handler for message attachment download
*/
function get_part($args)
{
if (!$args['download'] && $args['mimetype'] && in_array($args['mimetype'], $this->odf_mimetypes)) {
if (empty($_GET['_load'])) {
$suffix = preg_match('/(\.\w+)$/', $args['part']->filename, $m) ? $m[1] : '.odt';
$fn = md5(session_id() . $_SERVER['REQUEST_URI']) . $suffix;
// FIXME: copy file to disk because only apache can send the file correctly
$tempfn = $this->tempdir . $fn;
if (!file_exists($tempfn)) {
if ($args['body']) {
file_put_contents($tempfn, $args['body']);
}
else {
$fp = fopen($tempfn, 'w');
$imap = rcube::get_instance()->get_storage();
$imap->get_message_part($args['uid'], $args['id'], $args['part'], false, $fp);
fclose($fp);
}
// remember tempfiles in session to clean up on logout
$_SESSION['odfviewer']['tempfiles'][] = $fn;
}
// send webODF viewer page
$html = file_get_contents($this->home . '/odf.html');
header("Content-Type: text/html; charset=" . RCMAIL_CHARSET);
echo strtr($html, array(
'%%DOCROOT%%' => $this->urlbase,
'%%DOCURL%%' => $this->tempbase . $fn, # $_SERVER['REQUEST_URI'].'&_load=1',
));
$args['abort'] = true;
}
/*
else {
if ($_SERVER['REQUEST_METHOD'] == 'HEAD') {
header("Content-Length: " . max(10, $args['part']->size)); # content-length has to be present
$args['body'] = ' '; # send empty body
return $args;
}
}
*/
}
return $args;
}
/**
* Remove temp files opened during this session
*/
function session_cleanup()
{
foreach ((array)$_SESSION['odfviewer']['tempfiles'] as $fn) {
@unlink($this->tempdir . $fn);
}
// also trigger general garbage collection because not everybody logs out properly
$this->gc_cleanup();
}
/**
* Garbage collector function for temp files.
* Remove temp files older than two days
*/
function gc_cleanup()
{
$rcmail = rcube::get_instance();
$tmp = unslashify($this->tempdir);
$expire = mktime() - 172800; // expire in 48 hours
if ($dir = opendir($tmp)) {
while (($fname = readdir($dir)) !== false) {
if ($fname[0] == '.')
continue;
if (filemtime($tmp.'/'.$fname) < $expire)
@unlink($tmp.'/'.$fname);
}
closedir($dir);
}
}
}

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