Support Ping and Pong messages from the GraphQL over WebSocket protocol

[RunCMD159]

Hi,
I just refactored my existing graphql-java server to a spring-graphql implementation.
But somehow my websocket connection always terminates with invalid message as soon as my apollo-angular client sends an automatic ping messages.
I saw that ping/pong is not a supported messagetype in the GraphQLWebsocketHandler.

Am I missing something here?
How should i handle ping/pong messages with spring-graphql?

Thank you in advance

[rstoyanchev]

This was added to the protocol later so it's just missing.

[rstoyanchev]

Superseded by #270.