daniele-zurico / apollo2-subscriptions-how-to Goto Github PK

validateSDL , specifiedSDLRules , ValidationRule and many others

Is this subscriptions setup subject to the production notice given here?

"This is not suitable for running in a serious production app, because there is no way to share subscriptions and publishes across many running servers."

Thanks for your work on this. Can you give an example of how you would accomplish in your app structure?

gql`Post {
    author: Author
}`

I'm using Apollo Server 2 and Express.js vanilla (with apollo-server-express).

Everything works good also with Subscriptions except the Express session mechanism.

The problem:

I'm using cookie-session (https://github.com/expressjs/cookie-session, but I think this is the same for express-session middleware) and when my browser start a new connection with my server the ApolloServer onConnect hook doesn't have the req attribute and neither req.session and so on...

What I can do is to parse the cookies from webSocket.upgradeReq.headers.cookie in onConnect lifecycle hook, but it seems to me very hacky.

The code:

const { ApolloServer } = require('apollo-server-express')

const typeDefs = require('../src/graphql/types')
const resolvers = require('../src/graphql/resolvers')
const models = require('../src/models')

const apolloServer = new ApolloServer({
  typeDefs,
  resolvers,
  context: ({ req, connection }) => {
    // connection exists only on webSocket connection
    if (connection) {
      return {
        currentUser: connection.context.currentUser // <-- I NEED THIS!
      }
    }
    // if not a (webSocket) connection it is a "default" HTTP call
    return {
      models,
      currentUser: { id: req.user.id }
    }
  },
  subscriptions: {
    onConnect: (connectionParams, webSocket) => {
      // "connectionParams" is from the client but I cannot use it because cookies are HTTP-Only
      // I can retrieve cookies from here: "webSocket.upgradeReq.headers.cookie" but then I need to parse them which seems a bit hacky to me
      // return { currentUser: req.user.id } // <-- I NEED THIS (req.user.id doesn't exists)!
    }
  }
})

module.exports = apolloServer

I can't find anything on Apollo Server Docs site (for other topics very well documented!).

Where am I doing wrong?

StackOverflow question: https://stackoverflow.com/questions/52280481/graphql-subscription-websocket-nodejs-express-session-with-apollo-server-2

Thank you for your efforts to clarify subscriptions in 2.0 - I am struggling with it myself.

The following link seems to be broken:
http://www.dzurico.com/apollo-server-2-0-real-time-data-with-subscriptions/