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MediaFile thumbnail event hooks + VideoThumbnails plugin

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The exception thrown from MediaFile will be caught and simply result in
no thumbnail at all right now. In the future we might use a catch-all
and have a "cannot generate preview"-icon or something.

VideoThumbnails requires php5-ffmpeg and php5-gd.
This commit is contained in:
Mikael Nordfeldth 2014-04-16 19:14:26 +02:00
parent 00aa3fa734
commit 06d4cecf7f
7 changed files with 197 additions and 32 deletions
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5
EVENTS.txt
View File

@ -1440,3 +1440,8 @@ OtherAccountProfiles: Hook to add account profiles to a user account profile blo
href: link to the profile
text: text for the profile
image: mini image for the profile
CreateFileImageThumbnail: Hook to create image thumbnail source from a File
- $file: MediaFile object with related metadata
- &$imgPath: Path to image file which can be used as source for our thumbnail algorithm.
- $media: MIME media type ('image', 'video', 'audio' etc.)

5
classes/File.php
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@ -433,6 +433,11 @@ class File extends Managed_DataObject
return File_thumbnail::getKV('file_id', $this->id);
}
public function getPath()
{
return self::path($this->filename);
}
/**
* Blow the cache of notices that link to this URL
*

2
classes/File_thumbnail.php
View File

@ -84,6 +84,8 @@ class File_thumbnail extends Managed_DataObject
/**
* Save a thumbnail record for the referenced file record.
*
* FIXME: Add error handling
*
* @param int $file_id
* @param string $url
* @param int $width

31
lib/imagefile.php
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@ -70,8 +70,7 @@ class ImageFile
($info[2] == IMAGETYPE_PNG && function_exists('imagecreatefrompng')))) {
// TRANS: Exception thrown when trying to upload an unsupported image file format.
throw new Exception(_('Unsupported image file format.'));
return;
throw new UnsupportedMediaException(_('Unsupported image format.'), $this->filepath);
}
$this->type = ($info) ? $info[2]:$type;
@ -79,32 +78,38 @@ class ImageFile
$this->height = ($info) ? $info[1]:$height;
}
public function getPath()
{
if (!file_exists($this->filepath)) {
throw new ServerException('No file in ImageFile filepath');
}
return $this->filepath;
}
static function fromUpload($param='upload')
{
switch ($_FILES[$param]['error']) {
case UPLOAD_ERR_OK: // success, jump out
break;
case UPLOAD_ERR_INI_SIZE:
case UPLOAD_ERR_FORM_SIZE:
// TRANS: Exception thrown when too large a file is uploaded.
// TRANS: %s is the maximum file size, for example "500b", "10kB" or "2MB".
throw new Exception(sprintf(_('That file is too big. The maximum file size is %s.'),
ImageFile::maxFileSize()));
return;
throw new Exception(sprintf(_('That file is too big. The maximum file size is %s.'), ImageFile::maxFileSize()));
case UPLOAD_ERR_PARTIAL:
@unlink($_FILES[$param]['tmp_name']);
// TRANS: Exception thrown when uploading an image and that action could not be completed.
throw new Exception(_('Partial upload.'));
return;
case UPLOAD_ERR_NO_FILE:
// No file; probably just a non-AJAX submission.
return;
default:
common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " .
$_FILES[$param]['error']);
common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " . $_FILES[$param]['error']);
// TRANS: Exception thrown when uploading an image fails for an unknown reason.
throw new Exception(_('System error uploading file.'));
return;
}
$info = @getimagesize($_FILES[$param]['tmp_name']);
@ -112,8 +117,7 @@ class ImageFile
if (!$info) {
@unlink($_FILES[$param]['tmp_name']);
// TRANS: Exception thrown when uploading a file as image that is not an image or is a corrupt file.
throw new Exception(_('Not an image or corrupt file.'));
return;
throw new UnsupportedMediaException(_('Not an image or corrupt file.'), '[deleted]');
}
return new ImageFile(null, $_FILES[$param]['tmp_name']);
@ -176,7 +180,6 @@ class ImageFile
if (!file_exists($this->filepath)) {
// TRANS: Exception thrown during resize when image has been registered as present, but is no longer there.
throw new Exception(_('Lost our file.'));
return;
}
// Don't crop/scale if it isn't necessary
@ -214,7 +217,6 @@ class ImageFile
default:
// TRANS: Exception thrown when trying to resize an unknown file type.
throw new Exception(_('Unknown file type'));
return;
}
$image_dest = imagecreatetruecolor($width, $height);
@ -255,7 +257,6 @@ class ImageFile
default:
// TRANS: Exception thrown when trying resize an unknown file type.
throw new Exception(_('Unknown file type'));
return;
}
imagedestroy($image_src);

55
lib/mediafile.php
View File

@ -43,6 +43,7 @@ class MediaFile
var $fileurl = null;
var $short_fileurl = null;
var $mimetype = null;
var $thumbnailRecord = null;
function __construct(Profile $scoped, $filename = null, $mimetype = null)
{
@ -51,7 +52,12 @@ class MediaFile
$this->filename = $filename;
$this->mimetype = $mimetype;
$this->fileRecord = $this->storeFile();
try {
$this->thumbnailRecord = $this->storeThumbnail();
} catch (UnsupportedMediaException $e) {
// FIXME: Add "unknown media" icon or something
$this->thumbnailRecord = null;
}
$this->fileurl = common_local_url('attachment',
array('attachment' => $this->fileRecord->id));
@ -68,6 +74,11 @@ class MediaFile
common_local_url('file', array('notice' => $notice->id)));
}
public function getPath()
{
return File::path($this->filename);
}
function shortUrl()
{
return $this->short_fileurl;
@ -108,16 +119,30 @@ class MediaFile
*/
function storeThumbnail()
{
if (substr($this->mimetype, 0, strlen('image/')) != 'image/') {
// @fixme video thumbs would be nice!
return null;
$imgPath = null;
$media = common_get_mime_media($this->mimetype);
if (Event::handle('CreateFileImageThumbnail', array($this, &$imgPath, $media))) {
switch ($media) {
case 'image':
$imgPath = $this->getPath();
break;
default:
throw new UnsupportedMediaException(_('Unsupported media format.'), $this->getPath());
}
}
if (!file_exists($imgPath)) {
throw new ServerException(sprintf('Thumbnail source is not stored locally: %s', $imgPath));
}
try {
$image = new ImageFile($this->fileRecord->id,
File::path($this->filename));
} catch (Exception $e) {
// Unsupported image type.
return null;
$image = new ImageFile($this->fileRecord->id, $imgPath);
} catch (UnsupportedMediaException $e) {
// Avoid deleting the original
if ($image->getPath() != $this->getPath()) {
$image->unlink();
}
throw $e;
}
$outname = File::filename($this->scoped, 'thumb-' . $this->filename, $this->mimetype);
@ -128,7 +153,12 @@ class MediaFile
list($width, $height) = $this->scaleToFit($image->width, $image->height, $maxWidth, $maxHeight);
$image->resizeTo($outpath, $width, $height);
File_thumbnail::saveThumbnail($this->fileRecord->id,
// Avoid deleting the original
if ($image->getPath() != $this->getPath()) {
$image->unlink();
}
return File_thumbnail::saveThumbnail($this->fileRecord->id,
File::url($outname),
$width,
$height);
@ -189,40 +219,33 @@ class MediaFile
// TRANS: Client exception thrown when an uploaded file is larger than set in php.ini.
throw new ClientException(_('The uploaded file exceeds the ' .
'upload_max_filesize directive in php.ini.'));
return;
case UPLOAD_ERR_FORM_SIZE:
throw new ClientException(
// TRANS: Client exception.
_('The uploaded file exceeds the MAX_FILE_SIZE directive' .
' that was specified in the HTML form.'));
return;
case UPLOAD_ERR_PARTIAL:
@unlink($_FILES[$param]['tmp_name']);
// TRANS: Client exception.
throw new ClientException(_('The uploaded file was only' .
' partially uploaded.'));
return;
case UPLOAD_ERR_NO_FILE:
// No file; probably just a non-AJAX submission.
return;
case UPLOAD_ERR_NO_TMP_DIR:
// TRANS: Client exception thrown when a temporary folder is not present to store a file upload.
throw new ClientException(_('Missing a temporary folder.'));
return;
case UPLOAD_ERR_CANT_WRITE:
// TRANS: Client exception thrown when writing to disk is not possible during a file upload operation.
throw new ClientException(_('Failed to write file to disk.'));
return;
case UPLOAD_ERR_EXTENSION:
// TRANS: Client exception thrown when a file upload operation has been stopped by an extension.
throw new ClientException(_('File upload stopped by extension.'));
return;
default:
common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " .
$_FILES[$param]['error']);
// TRANS: Client exception thrown when a file upload operation has failed with an unknown reason.
throw new ClientException(_('System error uploading file.'));
return;
}
// Throws exception if additional size does not respect quota

39
lib/unsupportedmediaexception.php Normal file
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@ -0,0 +1,39 @@
<?php
/**
* GNU social - a federating social network
*
* class for an exception when a File is of unsupported media type
*
* 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 Exception
* @package GNUsocial
* @author Mikael Nordfeldth <mmn@hethane.se>
* @copyright 2014 Free Software Foundation, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
* @link https://www.gnu.org/software/social/
*/
if (!defined('GNUSOCIAL')) { exit(1); }
class UnsupportedMediaException extends ServerException
{
public function __construct($msg, $path)
{
common_debug(sprintf('UnsupportedMediaException "%1$s" for file "%2$s"', $msg, $path));
parent::__construct($msg);
}
}

90
plugins/VideoThumbnails/VideoThumbnailsPlugin.php Normal file
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@ -0,0 +1,90 @@
<?php
/**
* GNU social - a federating social network
*
* Plugin to make thumbnails of video files with ffmpeg
*
* 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 Plugin
* @package GNUsocial
* @author Mikael Nordfeldth <mmn@hethane.se>
* @copyright 2014 Free Software Foundation http://fsf.org
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link https://www.gnu.org/software/social/
*/
if (!defined('GNUSOCIAL')) { exit(1); }
/*
* Dependencies:
* php5-ffmpeg
* php5-gd
*
* Video support will depend on your ffmpeg.
*/
class VideoThumbnailsPlugin extends Plugin
{
/*
* This function should only extract an image from the video stream
* and disregard any scaling aspects in the resulting file, since
* this will be handled in the core thumbnail algorithm.
*/
public function onCreateFileImageThumbnail(MediaFile $file, &$imgPath, $media=null)
{
// This might accidentally pass application/ogg videos.
// If that's a problem, let's fix it in the calling function.
if ($media !== 'video') {
return true;
}
$movie = new ffmpeg_movie($file->getPath(), false);
$frames = $movie->getFrameCount();
if ($frames > 0) {
$frame = $movie->getFrame(floor($frames/2));
} else {
$frame = $movie->getNextKeyFrame();
}
// We failed to get a frame.
if ($frame === null) {
return true;
}
// Let's save our frame to a temporary file. If we fail, remove it.
$imgPath = tempnam(sys_get_temp_dir(), 'socialthumb');
if (!imagejpeg($frame->toGDImage(), $imgPath)) {
@unlink($imgPath);
return true;
}
return false;
}
public function onPluginVersion(&$versions)
{
$versions[] = array('name' => 'Video Thumbnails',
'version' => GNUSOCIAL_VERSION,
'author' => 'Mikael Nordfeldth',
'homepage' => 'https://www.gnu.org/software/social/',
'rawdescription' =>
// TRANS: Plugin description.
_m('HTML5 media attachment support'));
return true;
}
}