gnu-social/plugins/Embed/actions/oembed.php

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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* OembedPlugin implementation for GNU social
*
* @package GNUsocial
* @author Craig Andrews <candrews@integralblue.com>
* @author Mikael Nordfeldth <mmn@hethane.se>
* @author hannes
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
defined('GNUSOCIAL') || die();
/**
* Oembed provider implementation
*
* This class handles all /main/oembed(.xml|.json)/ requests.
*
* @copyright 2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class OEmbedAction extends Action
{
protected function handle()
{
parent::handle();
$url = $this->trimmed('url');
$tls = parse_url($url, PHP_URL_SCHEME) == 'https';
$root_url = common_root_url($tls);
if (substr(strtolower($url), 0, mb_strlen($root_url)) !== strtolower($root_url)) {
// TRANS: Error message displaying attachments. %s is the site's base URL.
throw new ClientException(sprintf(_('Embed data will only be provided for %s URLs.'), $root_url));
}
$path = substr($url, strlen($root_url));
$r = Router::get();
// $r->map will throw ClientException 404 if it fails to find a mapping
$proxy_args = $r->map($path);
$oembed=array();
$oembed['version']='1.0';
$oembed['provider_name']=common_config('site', 'name');
$oembed['provider_url']=common_root_url();
switch ($proxy_args['action']) {
case 'shownotice':
$oembed['type']='link';
try {
$notice = Notice::getByID($proxy_args['notice']);
} catch (NoResultException $e) {
throw new ClientException($e->getMessage(), 404);
}
$profile = $notice->getProfile();
$authorname = $profile->getFancyName();
// TRANS: oEmbed title. %1$s is the author name, %2$s is the creation date.
$oembed['title'] = sprintf(
_('%1$s\'s status on %2$s'),
$authorname,
common_exact_date($notice->created)
);
$oembed['author_name']=$authorname;
$oembed['author_url']=$profile->profileurl;
$oembed['url']=$notice->getUrl();
$oembed['html']=$notice->getRendered();
2016-01-21 18:48:30 +00:00
// maybe add thumbnail
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foreach ($notice->attachments() as $attachment) {
if (!$attachment instanceof File) {
common_debug('ATTACHMENTS array entry from notice id=='._ve($notice->getID()).
' is something else than a File dataobject: '._ve($attachment));
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continue;
}
try {
$thumb = $attachment->getThumbnail();
$thumb_url = $thumb->getUrl();
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$oembed['thumbnail_url'] = $thumb_url;
break; // only first one
} catch (UseFileAsThumbnailException $e) {
$oembed['thumbnail_url'] = $attachment->getUrl();
break; // we're happy with that
} catch (ServerException $e) {
//
} catch (ClientException $e) {
//
}
}
break;
case 'attachment':
$id = $proxy_args['attachment'];
$attachment = File::getKV($id);
if (empty($attachment)) {
// TRANS: Client error displayed in oEmbed action when attachment not found.
// TRANS: %d is an attachment ID.
$this->clientError(sprintf(_('Attachment %s not found.'), $id), 404);
}
if (
empty($attachment->filename)
&& !empty($file_oembed = File_oembed::getKV(
'file_id',
$attachment->id
))
) {
// Proxy the existing oembed information
$oembed['type']=$file_oembed->type;
$oembed['provider']=$file_oembed->provider;
$oembed['provider_url']=$file_oembed->provider_url;
$oembed['width']=$file_oembed->width;
$oembed['height']=$file_oembed->height;
$oembed['html']=$file_oembed->html;
$oembed['title']=$file_oembed->title;
$oembed['author_name']=$file_oembed->author_name;
$oembed['author_url']=$file_oembed->author_url;
$oembed['url']=$file_oembed->getUrl();
} elseif (substr($attachment->mimetype, 0, strlen('image/'))==='image/') {
$oembed['type']='photo';
if ($attachment->filename) {
$filepath = File::path($attachment->filename);
$gis = @getimagesize($filepath);
if ($gis) {
$oembed['width'] = $gis[0];
$oembed['height'] = $gis[1];
} else {
// TODO Either throw an error or find a fallback?
}
}
$oembed['url']=$attachment->getUrl();
try {
$thumb = $attachment->getThumbnail();
$oembed['thumbnail_url'] = $thumb->getUrl();
$oembed['thumbnail_width'] = $thumb->width;
$oembed['thumbnail_height'] = $thumb->height;
unset($thumb);
} catch (UnsupportedMediaException $e) {
// No thumbnail data available
}
} else {
$oembed['type']='link';
$oembed['url']=common_local_url(
'attachment',
array('attachment' => $attachment->id)
);
}
if ($attachment->title) {
$oembed['title']=$attachment->title;
}
break;
default:
// TRANS: Server error displayed in oEmbed request when a path is not supported.
// TRANS: %s is a path.
$this->serverError(sprintf(_('"%s" not supported for oembed requests.'), $path), 501);
}
switch ($this->trimmed('format')) {
case 'xml':
$this->init_document('xml');
$this->elementStart('oembed');
foreach (array(
'version', 'type', 'provider_name',
'provider_url', 'title', 'author_name',
'author_url', 'url', 'html', 'width',
'height', 'cache_age', 'thumbnail_url',
'thumbnail_width', 'thumbnail_height',
) as $key) {
if (isset($oembed[$key]) && $oembed[$key]!='') {
$this->element($key, null, $oembed[$key]);
}
}
$this->elementEnd('oembed');
$this->end_document('xml');
break;
case 'json':
case null:
$this->init_document('json');
$this->raw(json_encode($oembed));
$this->end_document('json');
break;
default:
// TRANS: Error message displaying attachments. %s is a raw MIME type (eg 'image/png')
$this->serverError(sprintf(_('Content type %s not supported.'), $apidata['content-type']), 501);
}
}
public function init_document($type)
{
switch ($type) {
case 'xml':
header('Content-Type: application/xml; charset=utf-8');
$this->startXML();
break;
case 'json':
header('Content-Type: application/json; charset=utf-8');
// Check for JSONP callback
$callback = $this->arg('callback');
if ($callback) {
print $callback . '(';
}
break;
default:
// TRANS: Server error displayed in oEmbed action when request specifies an unsupported data format.
$this->serverError(_('Not a supported data format.'), 501);
break;
}
}
public function end_document($type)
{
switch ($type) {
case 'xml':
$this->endXML();
break;
case 'json':
// Check for JSONP callback
$callback = $this->arg('callback');
if ($callback) {
print ')';
}
break;
default:
// TRANS: Server error displayed in oEmbed action when request specifies an unsupported data format.
$this->serverError(_('Not a supported data format.'), 501);
break;
}
return;
}
/**
* Is this action read-only?
*
* @param array $args other arguments
*
* @return boolean is read only action?
*/
public function isReadOnly($args)
{
return true;
}
}