WebSocket compression extension should not depends on SimpleCompressionHandler

[amizurov]

Expected Behavior

If compression is enabled on the server side then WebSocket compression extensions should be applied according to https://tools.ietf.org/html/rfc7692#section-5 and not depend on SimpleCompressionHandler present in pipeline or not.

Actual Behavior

Configure HttpServer with enable compression and set maxResponseSize to value grate than zero, WebSocket compression never applied.

Steps to Reproduce

public class EchoServer {

    public static void main(String[] args) {
        HttpServer server =
            HttpServer.create()
                .port(8080)
                .compress(true)
                .compress(2048)
                .wiretap(true)
                .route(r -> r.ws("/ws", (in, out) ->  out.sendObject(in.receiveFrames().doOnNext(WebSocketFrame::retain))));

        server.bindNow()
            .onDispose()
            .block();
    }
}

Possible Solution

Change logic inside WebsocketServerOperations constructor.

Your Environment

• Reactor version(s) used: 1.0.0.BUILD-SNAPSHOT
• Other relevant libraries versions (eg. netty ): 4.1.45.Final
• JVM version (javar -version): 1.8.0_232
• OS and version (eg uname -a): Darwin Kernel Version 18.7.0: Sun Dec 1 18:59:03 PST 2019; root:xnu-4903.278.19~1/RELEASE_X86_64 x86_64

[violetagg]

@amizurov PR #971

[violetagg]

We will provide a WebSocket configuration for compression on/off

[violetagg]

@amizurov @rstoyanchev PTAL PR #980

In 0.9.x versions we will keep both ways for specifying compression on/off for WebSocket (on HTTP level and the new way with the WebSocket configuration).
In 1.x I'm going to remove the one on HTTP level.