Deploying a GraphQL Server with Firebase Functions

firebase-graphql-basic.js

// sample graphql server deployed with firebase functions
// minimal server setup
// via http://graphql.org/graphql-js/running-an-express-graphql-server/
const functions = require('firebase-functions');
const express = require('express');
const graphqlHTTP = require('express-graphql');
const { buildSchema } = require('graphql');

// Init express
const app = express();

// Construct a schema, using GraphQL schema language
const schema = buildSchema(`
  type Query {
    hello: String
  }
`);

// The root provides a resolver function for each API endpoint
var root = {
  hello: () => {
    return 'Hello world!';
  },
};

app.use('/', graphqlHTTP({
  schema: schema,
  rootValue: root,
  graphiql: true,
}));

exports.graphql = functions.https.onRequest(app);