base-context initialization #147
                
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Hi,
This pull request addresses 2 changes.
First one is support for graphql-ws protocol specification: https://github.com/enisdenjo/graphql-ws/blob/master/PROTOCOL.md that is supported in newer versions of GraphiQL
Second one is base-context initialisation for connection-loop. Currently in subscriptions namespace there is no other way to extend base-context and include some ws request params data into base-context that connection-loop will use to process incoming GraphQL subscription request.
Why? Authorization i.e. If access_token is sent during ws establishment and user info (roles, groups) are important for subscription execution, base-context feels like logical place to hold that information. Since it is available to all subscription resolvers. Right?
If I misunderstood current codebase i apologise and would be really grateful if u could show me workarounds.
Thanks,
Robert