414 lines
15 KiB
PHP
414 lines
15 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2022 Varun Patil <radialapps@gmail.com>
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* @author Varun Patil <radialapps@gmail.com>
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* @license AGPL-3.0-or-later
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace OCA\Memories\Controller;
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use OCA\Memories\Exceptions;
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use OCA\Memories\Exif;
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use OCA\Memories\HttpResponseException;
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use OCA\Memories\Service\BinExt;
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use OCA\Memories\Util;
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use OCP\AppFramework\Http;
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use OCP\AppFramework\Http\DataDisplayResponse;
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use OCP\AppFramework\Http\JSONResponse;
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use OCP\Files\File;
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class VideoController extends GenericApiController
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{
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/**
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* @NoAdminRequired
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*
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* @PublicPage
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*
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* @NoCSRFRequired
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*
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* Transcode a video to HLS by proxy
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*/
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public function transcode(string $client, int $fileid, string $profile): Http\Response
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{
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return Util::guardEx(function () use ($client, $fileid, $profile) {
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// Make sure not running in read-only mode
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if (false !== $this->config->getSystemValue('memories.vod.disable', 'UNSET')) {
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throw Exceptions::Forbidden('Transcoding disabled');
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}
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// Check client identifier is 8 characters or more
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if (\strlen($client) < 8) {
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throw Exceptions::MissingParameter('client (invalid)');
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}
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// Get file
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$file = $this->fs->getUserFile($fileid);
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// Local files only for now
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if (!$file->getStorage()->isLocal()) {
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throw Exceptions::Forbidden('External storage not supported');
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}
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// Get file path
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$path = $file->getStorage()->getLocalFile($file->getInternalPath());
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if (!$path || !file_exists($path)) {
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throw Exceptions::NotFound('local file path');
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}
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// Check if file starts with temp dir
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$tmpDir = sys_get_temp_dir();
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if (0 === strpos($path, $tmpDir)) {
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throw Exceptions::Forbidden('files in temp directory not supported');
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}
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// Request and check data was received
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return Util::guardExDirect(function ($out) use ($client, $path, $profile) {
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try {
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$status = $this->getUpstream($client, $path, $profile);
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if (409 === $status || -1 === $status) {
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// Just a conflict (transcoding process changed)
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$response = new JSONResponse(['message' => 'Conflict'], Http::STATUS_CONFLICT);
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throw new HttpResponseException($response);
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}
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if (200 !== $status) {
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throw new \Exception("Transcoder returned {$status}");
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}
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} catch (\Exception $e) {
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if ($e instanceof HttpResponseException && Http::STATUS_CONFLICT === $e->response->getStatus()) {
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throw $e; // Logging this is noise
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}
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// We cannot show this error in the user interface, so log it
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$this->logger->error('Transcode failed: '.$e->getMessage(), ['app' => 'memories']);
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throw $e;
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}
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});
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});
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}
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/**
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* @NoAdminRequired
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*
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* @PublicPage
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*
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* @NoCSRFRequired
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*
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* Return the live video part of a Live Photo
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*/
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public function livephoto(
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int $fileid,
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string $liveid = '',
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string $format = '',
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string $transcode = ''
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) {
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return Util::guardEx(function () use ($fileid, $liveid, $format, $transcode) {
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$file = $this->fs->getUserFile($fileid);
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// Check file liveid
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if (!$liveid) {
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throw Exceptions::MissingParameter('liveid');
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}
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// Response data
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$name = '';
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$mime = '';
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$blob = null;
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$liveVideoPath = null;
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// Video is inside the file
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$path = null;
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if (str_starts_with($liveid, 'self__')) {
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$path = $file->getStorage()->getLocalFile($file->getInternalPath());
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$mime = 'video/mp4';
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$name = $file->getName().'.mp4';
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}
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// Different manufacurers have different formats
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if ('self__trailer' === $liveid) {
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try { // Get trailer
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$blob = Exif::getBinaryExifProp($path, '-trailer');
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} catch (\Exception $e) {
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throw Exceptions::NotFound('file trailer');
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}
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} elseif (str_starts_with($liveid, 'self__exifbin=')) {
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$field = substr($liveid, \strlen('self__exifbin='));
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// Need explicit whitelisting here because this is user input
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if (!\in_array($field, ['EmbeddedVideoFile', 'MotionPhotoVideo'], true)) {
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throw Exceptions::BadRequest('Invalid binary EXIF field');
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}
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try { // Get embedded video file
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$blob = Exif::getBinaryExifProp($path, "-{$field}");
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} catch (\Exception $e) {
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throw Exceptions::NotFound('Could not read binary EXIF field');
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}
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} elseif (str_starts_with($liveid, 'self__traileroffset=')) {
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// Remove prefix
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$offset = (int) substr($liveid, \strlen('self__traileroffset='));
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if ($offset <= 0) {
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throw Exceptions::BadRequest('Invalid offset');
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}
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// Read file from offset to end
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$blob = file_get_contents($path, false, null, $offset);
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} else {
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$liveFile = $this->getClosestLiveVideo($file);
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if (null === $liveFile) {
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throw Exceptions::NotFound('live video file');
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}
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// Requested only JSON info
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if ('json' === $format) {
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// IPhoto object for the live video
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return new JSONResponse([
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'fileid' => $liveFile->getId(),
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'etag' => $liveFile->getEtag(),
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'basename' => $liveFile->getName(),
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'mimetype' => $liveFile->getMimeType(),
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]);
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}
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$name = $liveFile->getName();
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$blob = $liveFile->getContent();
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$mime = $liveFile->getMimeType();
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$liveVideoPath = $liveFile->getStorage()->getLocalFile($liveFile->getInternalPath());
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}
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// Data not found
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if (!$blob) {
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throw Exceptions::NotFound('live video data');
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}
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// Cannot return JSON if it is not a file
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if ('json' === $format) {
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throw Exceptions::BadRequest('Invalid format');
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}
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// Transcode video if allowed
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if ($transcode && !$this->config->getSystemValue('memories.vod.disable', true)) {
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// If video path not given, write to temp file
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if (!$liveVideoPath) {
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$liveVideoPath = self::postFile($transcode, $blob)['path'];
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}
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// If this is H.264 it won't get transcoded anyway
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if ($liveVideoPath) {
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return Util::guardExDirect(function ($out) use ($transcode, $liveVideoPath) {
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$this->getUpstream($transcode, $liveVideoPath, 'max.mp4');
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});
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}
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}
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// Make and send response
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$response = new DataDisplayResponse($blob, Http::STATUS_OK, []);
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$response->setHeaders([
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'Content-Type' => $mime,
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'Content-Disposition' => "attachment; filename=\"{$name}\"",
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]);
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$response->cacheFor(3600 * 24, false, false);
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return $response;
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});
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}
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private function getUpstream(string $client, string $path, string $profile)
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{
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$returnCode = $this->getUpstreamInternal($client, $path, $profile);
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// If status code was 0, it's likely the server is down
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// Make one attempt to start after killing whatever is there
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if (0 !== $returnCode && 503 !== $returnCode) {
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return $returnCode;
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}
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// Start goVod and get log file
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$logFile = BinExt::startGoVod();
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$returnCode = $this->getUpstreamInternal($client, $path, $profile);
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if (0 === $returnCode) {
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throw new \Exception("Transcoder could not be started, check {$logFile}");
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}
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return $returnCode;
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}
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private function getUpstreamInternal(string $client, string $path, string $profile)
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{
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// Make sure query params are repeated
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// For example, in folder sharing, we need the params on every request
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$url = BinExt::getGoVodUrl($client, $path, $profile);
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if ($params = $_SERVER['QUERY_STRING']) {
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$url .= "?{$params}";
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}
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
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curl_setopt($ch, CURLOPT_HEADER, 0);
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// Catch connection abort here
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ignore_user_abort(true);
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// Stream the response to the browser without reading it into memory
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$headersWritten = false;
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curl_setopt($ch, CURLOPT_WRITEFUNCTION, static function ($curl, $data) use (&$headersWritten, $profile) {
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$returnCode = (int) curl_getinfo($curl, CURLINFO_HTTP_CODE);
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if (200 === $returnCode) {
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// Write headers if just got the first chunk of data
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if (!$headersWritten) {
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$headersWritten = true;
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$contentType = curl_getinfo($curl, CURLINFO_CONTENT_TYPE);
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header("Content-Type: {$contentType}");
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if (str_ends_with($profile, 'mov')) {
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// cache full video 24 hours
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header('Cache-Control: max-age=86400, public');
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} else {
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// no caching of segments
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header('Cache-Control: no-cache, no-store, must-revalidate');
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}
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http_response_code($returnCode);
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}
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echo $data;
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flush();
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if (connection_aborted()) {
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return -1; // stop the transfer
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}
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}
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return \strlen($data);
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});
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// Start the request
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curl_exec($ch);
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$returnCode = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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return $returnCode;
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}
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/**
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* POST to go-vod to create a temporary file.
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*
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* @param mixed $blob
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*/
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private static function postFile(string $client, $blob)
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{
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try {
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return self::postFileInternal($client, $blob);
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} catch (\Exception $e) {
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if (BinExt::startGoVod()) { // If the server is down, try to start it
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return self::postFileInternal($client, $blob);
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}
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throw $e;
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}
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}
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private static function postFileInternal(string $client, $blob)
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{
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$url = BinExt::getGoVodUrl($client, '/create', 'ignore');
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
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curl_setopt($ch, CURLOPT_HEADER, 0);
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curl_setopt($ch, CURLOPT_POST, true);
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curl_setopt($ch, CURLOPT_POSTFIELDS, $blob);
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$response = curl_exec($ch);
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$returnCode = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if (200 !== $returnCode) {
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throw new \Exception("Could not create temporary file ({$returnCode})");
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}
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return json_decode($response, true);
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}
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/**
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* Get the closest live video to the given file.
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*/
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private function getClosestLiveVideo(File $file): ?File
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{
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// Get stored video file (Apple MOV)
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$liveRecords = $this->tq->getLivePhotos($file->getId());
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// Get file paths for all live photos
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$liveFiles = array_map(fn ($r) => $this->rootFolder->getById((int) $r['fileid']), $liveRecords);
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$liveFiles = array_filter($liveFiles, static fn ($files) => \count($files) > 0 && $files[0] instanceof File);
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$liveFiles = array_map(static fn ($files) => $files[0], $liveFiles);
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// Should be filtered enough by now
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if (!\count($liveFiles)) {
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return null;
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}
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// All paths including the image and videos need to be processed
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$paths = array_map(static function (File $file) {
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$path = $file->getPath();
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$filename = strtolower($file->getName());
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// Remove extension so the filename itself counts in the path
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if (str_contains($filename, '.')) {
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$filename = substr($filename, 0, strrpos($filename, '.'));
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}
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// Get components with the filename as lowercase
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$components = explode('/', $path);
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if (($l = \count($components)) > 0) {
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$components[$l - 1] = $filename;
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}
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return $components;
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}, array_merge($liveFiles, [$file]));
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// Find closest path match
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$imagePath = array_pop($paths);
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$scores = array_map(static function ($path) use ($imagePath) {
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$score = 0;
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$length = min(\count($path), \count($imagePath));
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for ($i = 0; $i < $length; ++$i) {
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if ($path[$i] === $imagePath[$i]) {
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$score += 10000; // Exact match bonus
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} else {
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$score -= \count($path) - $i; // Walk down penalty
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break;
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}
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}
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return $score;
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}, $paths);
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// Sort by score
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array_multisort($scores, SORT_ASC, $liveFiles);
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return array_pop($liveFiles);
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}
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}
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