gnu-social/actions/apimediaupload.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/>.
/**
* Upload an image via the API
*
* @category API
* @author Zach Copley <zach@status.net>
* @copyright 2010 StatusNet, Inc.
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
defined('GNUSOCIAL') || die();
/**
* Upload an image via the API. Returns a shortened URL for the image
* to the user. Apparently modelled after a former Twitpic API.
*
* @category API
* @package GNUsocial
* @author Zach Copley <zach@status.net>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class ApiMediaUploadAction extends ApiAuthAction
{
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protected $needPost = true;
protected function prepare(array $args = [])
{
parent::prepare($args);
// fallback to xml for older clients etc
if (empty($this->format)) {
$this->format = 'xml';
}
if (!in_array($this->format, ['json', 'xml'])) {
throw new ClientException('This API call does not support the format '._ve($this->format));
}
return true;
}
protected function handle()
{
parent::handle();
// Workaround for PHP returning empty $_POST and $_FILES when POST
// length > post_max_size in php.ini
if (empty($_FILES)
&& empty($_POST)
&& ($_SERVER['CONTENT_LENGTH'] > 0)
) {
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// TRANS: Client error displayed when the number of bytes in a POST request exceeds a limit.
// TRANS: %s is the number of bytes of the CONTENT_LENGTH.
$msg = _m('The server was unable to handle that much POST data (%s byte) due to its current configuration.',
'The server was unable to handle that much POST data (%s bytes) due to its current configuration.',
intval($_SERVER['CONTENT_LENGTH']));
throw new ClientException(sprintf($msg, $_SERVER['CONTENT_LENGTH']));
}
try {
$upload = MediaFile::fromUpload('media', $this->scoped);
} catch (NoUploadedMediaException $e) {
common_debug('No media file was uploaded to the _FILES array');
$tempfile = new TemporaryFile('gs-mediaupload');
if ($this->arg('media')) {
common_debug('Found media parameter which we hope contains a media file!');
fwrite($tempfile->getResource(), $this->arg('media'));
} elseif ($this->arg('media_data')) {
common_debug('Found media_data parameter which we hope contains a base64-encoded media file!');
fwrite($tempfile->getResource(), base64_decode($this->arg('media_data')));
} else {
common_debug('No media|media_data POST parameter was supplied');
unset($tempfile);
throw $e;
}
common_debug('MediaFile importing the uploaded file with fromFileInfo');
fflush($tempfile->getResource());
$upload = MediaFile::fromFileInfo($tempfile, $this->scoped);
}
common_debug('MediaFile completed and saved us fileRecord with id=='._ve($upload->fileRecord->id));
// Thumbnails will be generated/cached on demand when accessed (such as with /attachment/:id/thumbnail)
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$this->showResponse($upload);
}
/**
* Show a Twitpic-like response with the ID of the media file
* and a (hopefully) shortened URL for it.
*
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* @param MediaFile $upload the uploaded file
*
* @return void
*/
protected function showResponse(MediaFile $upload)
{
$this->initDocument($this->format);
switch ($this->format) {
case 'json':
return $this->showResponseJson($upload);
case 'xml':
return $this->showResponseXml($upload);
default:
throw new ClientException('This API call does not support the format '._ve($this->format));
}
$this->endDocument($this->format);
}
protected function showResponseJson(MediaFile $upload)
{
$enc = $upload->fileRecord->getEnclosure();
// note that we use media_id instead of mediaid which XML users might've gotten used to (nowadays we service media_id in both!)
$output = [
'media_id' => $upload->fileRecord->id,
'media_id_string' => (string)$upload->fileRecord->id,
'media_url' => $upload->shortUrl(),
'size' => $upload->fileRecord->size,
];
if (common_get_mime_media($enc->mimetype) === 'image') {
$output['image'] = [
'w' => $enc->width,
'h' => $enc->height,
'image_type' => $enc->mimetype,
];
}
print json_encode($output);
}
protected function showResponseXml(MediaFile $upload)
{
$this->elementStart('rsp', array('stat' => 'ok', 'xmlns:atom'=>Activity::ATOM));
$this->element('mediaid', null, $upload->fileRecord->id);
$this->element('mediaurl', null, $upload->shortUrl());
$this->element('media_url', null, $upload->shortUrl());
$this->element('size', null, $upload->fileRecord->size);
$enclosure = $upload->fileRecord->getEnclosure();
$this->element('atom:link', array('rel' => 'enclosure',
'href' => $enclosure->url,
'type' => $enclosure->mimetype));
// Twitter specific metadata expected in response since Twitter's Media upload API v1.1 (even though Twitter doesn't use XML)
$this->element('media_id', null, $upload->fileRecord->id);
$this->element('media_id_string', null, (string)$upload->fileRecord->id);
if (common_get_mime_media($enclosure->mimetype) === 'image') {
$this->element('image', ['w'=>$enclosure->width, 'h'=>$enclosure->height, 'image_type'=>$enclosure->mimetype]);
}
$this->elementEnd('rsp');
}
/**
* Overrided clientError to show a more Twitpic-like error
*
* @param string $msg an error message
*/
public function clientError($msg, $code = 400, $format = null)
{
$this->initDocument($this->format);
switch ($this->format) {
case 'json':
$error = ['errors' => array()];
$error['errors'][] = ['message'=>$msg, 'code'=>131];
print json_encode($error);
break;
case 'xml':
$this->elementStart('rsp', array('stat' => 'fail'));
// @todo add in error code
$errAttr = array('msg' => $msg);
$this->element('err', $errAttr, null);
$this->elementEnd('rsp');
break;
}
$this->endDocument($this->format);
exit;
}
}