Upload file bigger than 40MB to Google App Engine?

When uploading larger files, you can consider the file to be chunked into small sets of requests (should be less than 32MB which is the current limit) that Google App Engine supports.

Check this package with examples - https://github.com/pionl/laravel-chunk-upload

Following is a working code which uses the above package.

View

<div id="resumable-drop" style="display: none">
        <p><button id="resumable-browse" class="btn btn-outline-primary" data-url="{{route('AddAttachments', Crypt::encrypt($rpt->DRAFT_ID))}}" style="width: 100%;
height: 91px;">Browse Report File..</button> 
    </div>

Javascript

 <script>
var $fileUpload = $('#resumable-browse');
var $fileUploadDrop = $('#resumable-drop');
var $uploadList = $("#file-upload-list");

if ($fileUpload.length > 0 && $fileUploadDrop.length > 0) {
    var resumable = new Resumable({
        // Use chunk size that is smaller than your maximum limit due a resumable issue
        // https://github.com/23/resumable.js/issues/51
        chunkSize: 1 * 1024 * 1024, // 1MB
        simultaneousUploads: 3,
        testChunks: false,
        throttleProgressCallbacks: 1,
        // Get the url from data-url tag
        target: $fileUpload.data('url'),
        // Append token to the request - required for web routes
        query:{_token : $('input[name=_token]').val()}
    });

// Resumable.js isn't supported, fall back on a different method
    if (!resumable.support) {
        $('#resumable-error').show();
    } else {
        // Show a place for dropping/selecting files
        $fileUploadDrop.show();
        resumable.assignDrop($fileUpload[0]);
        resumable.assignBrowse($fileUploadDrop[0]);

        // Handle file add event
        resumable.on('fileAdded', function (file) {
            $("#resumable-browse").hide();
            // Show progress pabr
            $uploadList.show();
            // Show pause, hide resume
            $('.resumable-progress .progress-resume-link').hide();
            $('.resumable-progress .progress-pause-link').show();
            // Add the file to the list
            $uploadList.append('<li class="resumable-file-' + file.uniqueIdentifier + '">Uploading <span class="resumable-file-name"></span> <span class="resumable-file-progress"></span>');
            $('.resumable-file-' + file.uniqueIdentifier + ' .resumable-file-name').html(file.fileName);
            // Actually start the upload
            resumable.upload();
        });
        resumable.on('fileSuccess', function (file, message) {
            // Reflect that the file upload has completed
            location.reload();
        });
        resumable.on('fileError', function (file, message) {
             $("#resumable-browse").show();
            // Reflect that the file upload has resulted in error
            $('.resumable-file-' + file.uniqueIdentifier + ' .resumable-file-progress').html('(file could not be uploaded: ' + message + ')');
        });
        resumable.on('fileProgress', function (file) {
            // Handle progress for both the file and the overall upload
            $('.resumable-file-' + file.uniqueIdentifier + ' .resumable-file-progress').html(Math.floor(file.progress() * 100) + '%');
            $('.progress-bar').css({width: Math.floor(resumable.progress() * 100) + '%'});
        });
    }

}
</script>

Controller

 public function uploadAttachmentAsChunck(Request $request, $id) {
    // create the file receiver
    $receiver = new FileReceiver("file", $request, HandlerFactory::classFromRequest($request));

    // check if the upload is success, throw exception or return response you need
    if ($receiver->isUploaded() === false) {
        throw new UploadMissingFileException();
    }

    // receive the file
    $save = $receiver->receive();

    // check if the upload has finished (in chunk mode it will send smaller files)
    if ($save->isFinished()) {
        // save the file and return any response you need, current example uses `move` function. If you are
        // not using move, you need to manually delete the file by unlink($save->getFile()->getPathname())
        $file = $save->getFile();

        $fileName = $this->createFilename($file);
        // Group files by mime type
        $mime = str_replace('/', '-', $file->getMimeType());
        // Group files by the date (week
        $dateFolder = date("Y-m-W");

        $disk = Storage::disk('gcs');
        $gurl = $disk->put($fileName, $file);

        $draft = DB::table('draft')->where('DRAFT_ID','=', Crypt::decrypt($id))->get()->first();

        $prvAttachments = DB::table('attachments')->where('ATTACHMENT_ID','=', $draft->ATT_ID)->get();
        $seqId = sizeof($prvAttachments) + 1;

        //Save Submission Info
        DB::table('attachments')->insert(
            [   'ATTACHMENT_ID' => $draft->ATT_ID,
                'SEQ_ID' => $seqId,
                'ATT_TITLE' => $fileName,
                'ATT_DESCRIPTION' => $fileName,
                'ATT_FILE' => $gurl
            ]
        );

         return response()->json([
            'path' => 'gc',
            'name' => $fileName,
            'mime_type' => $mime,
            'ff' =>  $gurl
        ]);

       
    }

    // we are in chunk mode, lets send the current progress
    /** @var AbstractHandler $handler */
    $handler = $save->handler();

        return response()->json([
            "done" => $handler->getPercentageDone(),
        ]);
    }

    

    /**
     * Create unique filename for uploaded file
     * @param UploadedFile $file
     * @return string
     */
    protected function createFilename(UploadedFile $file)
    {
        $extension = $file->getClientOriginalExtension();
        $filename = str_replace(".".$extension, "", $file->getClientOriginalName()); // Filename without extension

        // Add timestamp hash to name of the file
        $filename .= "_" . md5(time()) . "." . $extension;

        return $filename;
    }