AssembleUploadChunksJob.php

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<?php
use MediaWiki\Context\RequestContext;
use MediaWiki\Logger\LoggerFactory;
use MediaWiki\Request\WebRequestUpload;
use MediaWiki\Status\Status;
use Wikimedia\ScopedCallback;
 
class AssembleUploadChunksJob extends Job implements GenericParameterJob {
    public function __construct( array $params ) {
        parent::__construct( 'AssembleUploadChunks', $params );
        $this->removeDuplicates = true;
    }
 
    public function run() {
        $scope = RequestContext::importScopedSession( $this->params['session'] );
        $this->addTeardownCallback( static function () use ( &$scope ) {
            ScopedCallback::consume( $scope ); // T126450
        } );
 
        $logger = LoggerFactory::getInstance( 'upload' );
        $context = RequestContext::getMain();
        $user = $context->getUser();
        try {
            if ( !$user->isRegistered() ) {
                $this->setLastError( "Could not load the author user from session." );
 
                return false;
            }
 
            // TODO add some sort of proper locking maybe
            $startingStatus = UploadBase::getSessionStatus( $user, $this->params['filekey'] );
            if (
                !$startingStatus ||
                ( $startingStatus['result'] ?? '' ) !== 'Poll' ||
                ( $startingStatus['stage'] ?? '' ) !== 'queued'
            ) {
                $logger->warning( "Tried to assemble upload that is in stage {stage}/{result}",
                    [
                        'stage' => $startingStatus['stage'] ?? '-',
                        'result' => $startingStatus['result'] ?? '-',
                        'status' => (string)( $startingStatus['status'] ?? '-' ),
                        'filekey' => $this->params['filekey'],
                        'filename' => $this->params['filename'],
                        'user' => $user->getName(),
                    ]
                );
                // If it is marked as currently in progress, abort. Otherwise
                // assume it is some sort of replag issue or maybe a retry even
                // though retries are impossible and just warn.
                if (
                    $startingStatus &&
                    $startingStatus['stage'] === 'assembling' &&
                    $startingStatus['result'] !== 'Failure'
                ) {
                    $this->setLastError( __METHOD__ . " already in progress" );
                    return false;
                }
            }
            UploadBase::setSessionStatus(
                $user,
                $this->params['filekey'],
                [ 'result' => 'Poll', 'stage' => 'assembling', 'status' => Status::newGood() ]
            );
 
            $upload = new UploadFromChunks( $user );
            $upload->continueChunks(
                $this->params['filename'],
                $this->params['filekey'],
                new WebRequestUpload( $context->getRequest(), 'null' )
            );
            if (
                isset( $this->params['filesize'] ) &&
                $this->params['filesize'] !== (int)$upload->getOffset()
            ) {
                // Check to make sure we are not executing prior to the API's
                // transaction being committed. (T350917)
                throw new UnexpectedValueException(
                    "UploadStash file size does not match job's. Potential mis-nested transaction?"
                );
            }
            // Combine all of the chunks into a local file and upload that to a new stash file
            $status = $upload->concatenateChunks();
            if ( !$status->isGood() ) {
                UploadBase::setSessionStatus(
                    $user,
                    $this->params['filekey'],
                    [ 'result' => 'Failure', 'stage' => 'assembling', 'status' => $status ]
                );
                $logger->info( "Chunked upload assembly job failed for {filekey} because {status}",
                    [
                        'filekey' => $this->params['filekey'],
                        'filename' => $this->params['filename'],
                        'user' => $user->getName(),
                        'status' => (string)$status
                    ]
                );
                // the chunks did not get assembled, but this should not be considered a job
                // failure - they simply didn't pass verification for some reason, and that
                // reason is stored in above session to inform the clients
                return true;
            }
 
            // We can only get warnings like 'duplicate' after concatenating the chunks
            $status = Status::newGood();
            $status->value = [
                'warnings' => UploadBase::makeWarningsSerializable(
                    $upload->checkWarnings( $user )
                )
            ];
 
            // We have a new filekey for the fully concatenated file
            $newFileKey = $upload->getStashFile()->getFileKey();
 
            // Remove the old stash file row and first chunk file
            // Note: This does not delete the chunks, only the stash file
            // which is same as first chunk but with a different name.
            $upload->stash->removeFileNoAuth( $this->params['filekey'] );
 
            // Build the image info array while we have the local reference handy
            $apiUpload = ApiUpload::getDummyInstance();
            $imageInfo = $apiUpload->getUploadImageInfo( $upload );
 
            // Cleanup any temporary local file
            $upload->cleanupTempFile();
 
            // Cache the info so the user doesn't have to wait forever to get the final info
            UploadBase::setSessionStatus(
                $user,
                $this->params['filekey'],
                [
                    'result' => 'Success',
                    'stage' => 'assembling',
                    'filekey' => $newFileKey,
                    'imageinfo' => $imageInfo,
                    'status' => $status
                ]
            );
            $logger->info( "{filekey} successfully assembled into {newkey}",
                [
                    'filekey' => $this->params['filekey'],
                    'newkey' => $newFileKey,
                    'filename' => $this->params['filename'],
                    'user' => $user->getName(),
                    'status' => (string)$status
                ]
            );
        } catch ( Exception $e ) {
            UploadBase::setSessionStatus(
                $user,
                $this->params['filekey'],
                [
                    'result' => 'Failure',
                    'stage' => 'assembling',
                    'status' => Status::newFatal( 'api-error-stashfailed' )
                ]
            );
            $this->setLastError( get_class( $e ) . ": " . $e->getMessage() );
            // To be extra robust.
            MWExceptionHandler::rollbackPrimaryChangesAndLog( $e );
 
            return false;
        }
 
        return true;
    }
 
    public function getDeduplicationInfo() {
        $info = parent::getDeduplicationInfo();
        if ( is_array( $info['params'] ) ) {
            $info['params'] = [ 'filekey' => $info['params']['filekey'] ];
        }
 
        return $info;
    }
 
    public function allowRetries() {
        return false;
    }
}