Add WebSocketService

[minwoox]

Motivation: It would be nice if we can provide a service that supports The WebSocket Protocol

Modifications:

• Add WebSocketService and WebSocketHandler to implement the service using back pressure.
• Add WebSocketFrame that represents the web socket frames.
• Add the interface BinaryData and its implementation:
  • ByteBufBinaryData and ByteArrayBinaryData which, previously, were ByteArrayHttpData and ByteBufHttpData.
  • WebSocketFrame also uses BinaryData to store the application data.

Result:

• You can now use WebSocketService to send WebSocket messages.

  ServerBuilder sb = ...
  WebSocketHandler backpressureHandler = (ctx, messages) -> { 
      WebSocketWriter webSocketWriter = WebSocket.streaming();
      // Write frames using back pressure.
      return webSocketWriter;
  };
  sb.service("/chat", WebSocketService.of(backpressureHandler));
  

Todos:

• Provide another abstract class for the WebSocketHandler so that a user can implement WebSocket easily without considering back pressure. (next PR)
• Support WebSocketClient. (next PR)
• Support extensions. (next PR)

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (main@62349ab). Click here to learn what that means. Patch has no changes to coverable lines.

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Additional details and impacted files

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  Branches        ?     7771           
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  Partials        ?     3925           

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[minwoox]

I think this is ready for review. 😉

[minwoox]

@ikhoon All fixed. PTAL. 😉

[minwoox]

I think this is ready. 😄 PTAL. 🙇

[minwoox]

All addressed. PTAL. 🙇

[minwoox]

Thanks a lot for reviewing. 🙇‍♂️