Upload File with apollo-server-lambda

Help
1

Hi everyone, I’m try implement graphql with apollo server lambda in my enterprise but i have problems with upload files.

When I upload one file, he is empty and corrupted. for this implementation I use the code below.

Anybody can help me?

Server

const express = require('express');
import { ApolloServer } from 'apollo-server-lambda';
const { graphqlUploadExpress } = require('graphql-upload');
import typeDefs from './graphql/typeDefs';
import resolvers from './graphql/resolvers';

const server = new ApolloServer({
  typeDefs,
  resolvers,
  dataSources: () => ({}),
});

export const graphqlHandler = server.createHandler({
  expressAppFromMiddleware(middleware) {
    const app = express();
    app.use(graphqlUploadExpress());
    app.use(middleware);
    return app;
  },
});

Schema

scalar Upload

type File {
  filename: String!
  mimetype: String!
  encoding: String!
}

type Query {
  otherFields: Boolean!
}

type Mutation {
  singleUpload(file: Upload!): File!
}

Resolver

const { finished } = require('stream/promises');
const { GraphQLUpload } = require('graphql-upload');

const resolvers = {
  Upload: GraphQLUpload,

  Mutation: {
    singleUpload: async (parent: any, { file }: any) => {
      const { createReadStream, filename, mimetype, encoding } = await file;
      const stream = createReadStream();
      const out = require('fs').createWriteStream(filename);
      stream.pipe(out);
      await finished(out);

      return { filename, mimetype, encoding };
    },
  },
};

export default resolvers;
2

Hi all.
We found an solution.

We change to te code below:

- Server

import Express, { Application } from 'express';
import { ApolloServer } from 'apollo-server-lambda';
import { graphqlUploadExpress } from 'graphql-upload';
import typeDefs from './graphql/typeDefs';
import resolvers from './graphql/resolvers';

const server = new ApolloServer({
  typeDefs,
  resolvers,
  dataSources: () => ({}),
});

export const graphqlHandler = server.createHandler({
  expressAppFromMiddleware(middleware) {
    const app: Application = Express();
    app.use(graphqlUploadExpress());
    app.use(middleware);
    return app;
  },
  expressGetMiddlewareOptions: {
    cors: {
      origin: '*',
      credentials: false,
    },
    bodyParserConfig: { limit: '50mb' },
  },
});