Ask questionsHandle Sec-Websocket-Protocol response header for Apollo client



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<!-- START BUG TEMPLATE (Please delete the rest of this if you're not filing a bug.) -->

If submitting a bug, please provide the following:


  • Elixir version (elixir -v): 1.7.4
  • Absinthe version (mix deps | grep absinthe): 1.4.13
  • Client Framework and version (Relay, Apollo, etc): Apollo

Expected behavior

Connect to Absinthe GraphQL websocket with Apollo from Vue app and handling the Sec-Websocket-Protocol header.

Actual behavior

WebSocket connection to 'ws://localhost:4000/ws/websocket' failed: Error during WebSocket handshake: Sent non-empty 'Sec-WebSocket-Protocol' header but no response was received


The Apollo client sends the Sec-WebSocket-Protocol: graphql-ws header, but the Absinthe server doesn't handle this and doesn't return the Sec-Websocket-Protocol header.


Answer questions ivan-kolmychek

As a side-note, it also breaks things that are powered by Apollo that are made by third parties, like Altair GraphQL client.

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