gnu-social/lib/attachment.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* widget for displaying a list of notice attachments
*
* PHP version 5
*
* LICENCE: 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/>.
*
* @category UI
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @author Sarven Capadisli <csarven@status.net>
* @copyright 2008 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('GNUSOCIAL')) { exit(1); }
/**
* used for one-off attachment action
*/
class Attachment extends AttachmentListItem
{
function showLink() {
if (Event::handle('StartShowAttachmentLink', array($this->out, $this->attachment))) {
$this->out->elementStart('div', array('id' => 'attachment_view',
'class' => 'hentry'));
$this->out->elementStart('div', 'entry-title');
$this->out->element('a', $this->linkAttr(), $this->linkTitle());
$this->out->elementEnd('div');
$this->out->elementStart('div', 'entry-content');
$this->showRepresentation();
$this->out->elementEnd('div');
Event::handle('EndShowAttachmentLink', array($this->out, $this->attachment));
$this->out->elementEnd('div');
}
}
function show() {
$this->showNoticeAttachment();
}
function linkAttr() {
return array('rel' => 'external', 'href' => $this->attachment->url);
}
function linkTitle() {
return $this->attachment->url;
}
function showRepresentation() {
if (Event::handle('StartShowAttachmentRepresentation', array($this->out, $this->attachment))) {
if (!empty($this->attachment->mimetype)) {
switch ($this->attachment->mimetype) {
case 'image/gif':
case 'image/png':
case 'image/jpg':
case 'image/jpeg':
$this->out->element('img', array('src' => $this->attachment->url, 'alt' => 'alt'));
break;
case 'application/ogg':
$arr = array('type' => $this->attachment->mimetype,
'data' => $this->attachment->url,
'width' => 320,
'height' => 240
);
$this->out->elementStart('object', $arr);
$this->out->element('param', array('name' => 'src', 'value' => $this->attachment->url));
$this->out->element('param', array('name' => 'autoStart', 'value' => 1));
$this->out->elementEnd('object');
break;
case 'audio/ogg':
case 'audio/x-speex':
case 'video/mpeg':
case 'audio/mpeg':
case 'video/mp4':
case 'video/ogg':
case 'video/quicktime':
case 'video/webm':
$mediatype = common_get_mime_media($this->attachment->mimetype);
try {
$thumb = $this->attachment->getThumbnail();
$poster = $thumb->getUrl();
unset ($thumb);
} catch (Exception $e) {
$poster = null;
}
$this->out->elementStart($mediatype,
array('class'=>'attachment_player',
'poster'=>$poster,
'controls'=>'controls'));
$this->out->element('source',
array('src'=>$this->attachment->url,
'type'=>$this->attachment->mimetype));
$this->out->elementEnd($mediatype);
break;
case 'text/html':
if ($this->attachment->filename) {
// Locally-uploaded HTML. Scrub and display inline.
$this->showHtmlFile($this->attachment);
break;
}
// Fall through to default.
default:
Event::handle('ShowUnsupportedAttachmentRepresentation', array($this->out, $this->attachment));
}
} else {
Event::handle('ShowUnsupportedAttachmentRepresentation', array($this->out, $this->attachment));
}
}
Event::handle('EndShowAttachmentRepresentation', array($this->out, $this->attachment));
}
protected function showHtmlFile(File $attachment)
{
$body = $this->scrubHtmlFile($attachment);
if ($body) {
$this->out->raw($body);
}
}
/**
* @return mixed false on failure, HTML fragment string on success
*/
protected function scrubHtmlFile(File $attachment)
{
$path = File::path($attachment->filename);
if (!file_exists($path) || !is_readable($path)) {
common_log(LOG_ERR, "Missing local HTML attachment $path");
return false;
}
$raw = file_get_contents($path);
// Normalize...
$dom = new DOMDocument();
if(!$dom->loadHTML($raw)) {
common_log(LOG_ERR, "Bad HTML in local HTML attachment $path");
return false;
}
// Remove <script>s or htmlawed will dump their contents into output!
// Note: removing child nodes while iterating seems to mess things up,
// hence the double loop.
$scripts = array();
foreach ($dom->getElementsByTagName('script') as $script) {
$scripts[] = $script;
}
foreach ($scripts as $script) {
common_log(LOG_DEBUG, $script->textContent);
$script->parentNode->removeChild($script);
}
// Trim out everything outside the body...
$body = $dom->saveHTML();
$body = preg_replace('/^.*<body[^>]*>/is', '', $body);
$body = preg_replace('/<\/body[^>]*>.*$/is', '', $body);
require_once INSTALLDIR.'/extlib/htmLawed/htmLawed.php';
$config = array('safe' => 1,
'deny_attribute' => 'id,style,on*',
'comment' => 1); // remove comments
$scrubbed = htmLawed($body, $config);
return $scrubbed;
}
}