A middleware to support file uploads in GraphQL

5.0.0 2020-05-07 08:08 UTC


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A PSR-15 middleware to support file uploads in GraphQL. It implements the multipart request specification for webonyx/graphql-php.

Quick start

Install the library via composer:

composer require ecodev/graphql-upload

Configure as middleware

In Laminas Mezzio, it would typically be in config/routes.php something like:

use Application\Action\GraphQLAction;
use Mezzio\Helper\BodyParams\BodyParamsMiddleware;
use GraphQL\Upload\UploadMiddleware;

$app->post('/graphql', [
    UploadMiddleware::class, // This is the magic
], 'graphql');

Other frameworks

This lib is an implementation of PSR-15, so it can be used with any framework supporting PSR-15. For specific configuration instructions, refer to your framework documentation.

If your framework does not support PSR-15 middleware, you will probably need some kind of bridge. Again, refer to your framework for specific instructions. Or else, you could use the direct usage below for manual integration.

Direct usage

If you don't use middleware, it can be called directly like so:


use GraphQL\Server\StandardServer;
use GraphQL\Upload\UploadMiddleware;
use Laminas\Diactoros\ServerRequestFactory;

// Create request (or get it from a framework)
$request = ServerRequestFactory::fromGlobals();
$request = $request->withParsedBody(json_decode($request->getBody()->getContents(), true));

// Process uploaded files
$uploadMiddleware = new UploadMiddleware();
$request = $uploadMiddleware->processRequest($request);

// Execute request and emits response
$server = new StandardServer(/* your config here */);
$result = $server->executePsrRequest($request);

Usage in schema

Then you can start using in your mutations like so:


use GraphQL\Type\Definition\ObjectType;
use GraphQL\Type\Definition\Type;
use GraphQL\Type\Schema;
use GraphQL\Upload\UploadType;
use Psr\Http\Message\UploadedFileInterface;

// Build your Schema
$schema = new Schema([
    'query' => new ObjectType([
        'name' => 'Query',
    'mutation' => new ObjectType([
        'name' => 'Mutation',
        'fields' => [
            'testUpload' => [
                'type' => Type::string(),
                'args' => [
                    'text' => Type::string(),
                    'file' => new UploadType(),
                'resolve' => function ($root, array $args): string {
                    /** @var UploadedFileInterface $file */
                    $file = $args['file'];

                    // Do something with the file

                    return 'Uploaded file was ' . $file->getClientFilename() . ' (' . $file->getClientMediaType() . ') with description: ' . $args['text'];


  • It only works with PSR-7 requests. If you were not using PSR-7 yet, laminas-diactoros is one of many implementation that could be used to create PSR-7 requests.