Subscription with Hasura Server

[VietKhangLH]

Actual Behaviour

Hello,

I have the error :
WebSocket connection to 'the url' failed: Error during WebSocket handshake: 'Sec-WebSocket-Protocol' header value 'graphql-ws' in response does not match any of sent values

Debug Information
I work with Hasura on Heroku.
I just interface graphql-ws with Apollo with your code.

Further Information
Everything was working with ws client from Apollo.
But I had to change because of security issues that your kind work strive to resolve.

[enisdenjo]

You are not communicating with this library. Our sub-protocol is graphql-transport-ws.

You are communicating with subscriptions-transport-ws, their sub-protocol isgraphql-ws.

Make sure that you use this library (or implement the Protocol) both server and client side.

[enisdenjo]

Hasura's built in subscriptions solution is subscriptions-transport-ws.

As this library offers a fundamentally different Protocol, you cannot use their lib and this one interchangeably.

[VietKhangLH]

How can we make it compatible with Hasura ?
Is it a work in Hasura Engine ? (server side)

[enisdenjo]

Yap, the server engine from Hasura has to implement this Protocol. I am most certainly bias, but this Protocol feels more reliable and secure than Apollo's; I am even actively working on making it a part of the standard together with the brilliant guys from the official GraphQL over HTTP Work Group.

I would've be happy to push a PR, given enough time; however, their server implementation is written in Haskell which I am not familiar with. 😅

Maybe open an issue at their repo? See what they think about this?

[enisdenjo]

Closing in favour of hasura/graphql-engine#6264.