Ability to define WebSocket Extensions

[dansiviter]

Environment Details

• Helidon Version: 2.0.0-M2
• Helidon SE or Helidon MP: MP
• JDK version: N/A
• OS: N/A
• Docker version (if applicable):

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Problem Description

WebSocket implementation does not permit defining of installed extensions. This is predicated on another change being performed in Tyrus before this can work: (eclipse-ee4j/tyrus#694).

I think the change would be overriding the #getInstalledExtensions method in here but not sure of how the actual Extension classes should be passed/loaded into it.

Steps to reproduce

N/A

[spericas]

@dansiviter Interesting, what extension are you looking to use?

[dansiviter]

@spericas permessage-deflate is the key one. It massively shrinks the websocket frames which is very useful for larger messages when clients are not geographically close.

It looks like Tyrus needs to do some work before Helidon can leverage it though. Undertow uses #installedExtensions as a basis for all endpoints, but Tyrus doesn't for some reason. 🤷‍♂

[dansiviter]

I've submitted a PR to Tyrus to link this to WebsocketContainer#getInstalledExtensions (eclipse-ee4j/tyrus#695). With this it should just be a case of overriding TyrusServerContainer#getInstalledExtensions in TyrusSupport.

[dansiviter]

Looks like 2.0.0-M1 of Tyrus has this in. I'll create a PR when it's made it to release version.

[barchetta]

Implemented by PR #1934. Thanks @dansiviter