Apollo-server: Apollo Server 2.0 RC, subscriptions and Websocket secure (WSS)

[stephanerotureau]

Hello all,

I'm trying to migrate one of my Apollo server from v1 to v2 and I'm unable to have subscriptions working with wss. I have followed the official documentation and read several articles on the Internet but nothing really clear explaining how to set up wss. Here my code:

`import express from "express";
import { createServer } from "https";
import { readFileSync } from "fs";
import { ApolloServer, gql } from "apollo-server-express";
import { resolvers } from "./data/resolvers";

const PORT = 3000;
const app = express();

const typeDefs = gql ${readFileSync("./data/schema.graphql", "utf-8")} ;
const server = new ApolloServer({ typeDefs, resolvers });

server.applyMiddleware({ app });

const sslOptions = {
key: readFileSync("./ssl/key.pem"),
cert: readFileSync("./ssl/cert.pem"),
};
const wss = createServer(sslOptions, app);
server.installSubscriptionHandlers(wss);

wss.listen(PORT, () =>
console.log(🚀 Server ready at https://localhost:${PORT}${server.graphqlPath})
);
`
When lauching the Node.js server, I have no error message, just the successful one:

[email protected] start /usr/src/app
babel-node index.js

🚀 Server ready at https://localhost:3000/graphql
Connected to MongoDB database.

But by testing, I can't access the server via wss and the playground is also unavailable via https 😞
Thanks a lot!

[stephanerotureau]

Closed, issue was not related to Apollo... For info, the above code is totally functional if you want to set up wss! Sorry for the noise!

[unicodeveloper]

I'm glad you were able to get it to work @stephanerotureau. In case you run into any issue, here is a practical example of how it works on Apollo Server 2.0 and a client app

[Gregoirevda]

I found it confusing query and mutations can be done at root /, but subscriptions need to be done /graphql

[prabak]

I am setting up WSS with typescript, but I am getting the following error:

Argument of type 'import("https").Server' is not assignable to parameter of type 'import("http").Server'. Property 'maxHeadersCount' is missing in type 'Server'.

The error happens when i am calling installSubscriptionHandlers(server) where server is an instance of https.Server. Any idea?

For now, I am type casting the server to any.

[vreality64]

@prabak
I've had same problem with you. The type signature of installSubscriptionHandlers should be changed like HttpServer | HttpsServer.

https://github.com/apollographql/apollo-server/blob/master/packages/apollo-server-core/src/ApolloServer.ts#L391

[vertho]

I'm glad you were able to get it to work @stephanerotureau. In case you run into any issue, here is a practical example of how it works on Apollo Server 2.0 and a client app

Not wss

[techuila]

How do you know if your websocket is now wss or still a ws?