WebServer serving static files hangs browser when using compression

[wyvx]

I have a simple webserver serving static content. If I add compression, Chrome and Safari (browsers I tested with) hang waiting for a response.

Environment Details

• Helidon Version: 4.0.0
• Helidon SE or Helidon MP: SE
• JDK version: 21
• OS: macOS Ventura 13.6.1
• Docker version (if applicable): NA

---

Problem Description

I have a simple webserver serving static content.
If I serve files without compression everything works as expected.
If I include compression as per documentation, by adding gzip, deflate, or both, Chrome and Safari hang waiting for a response.
The problem is easily reproducible and happens every time.
No exceptions are thrown.

Steps to reproduce

This is the webserver:

        WebServer.builder()
                .address(InetAddress.getLoopbackAddress())
                .port(60_000)
                .routing(builder -> builder
                        .register("/", StaticContentService.builder("mypath")
                                .welcomeFileName("index.html")
                                .build()
                        )
                )
                .build();

And these are the Gradle dependencies for Helidon:

    api(platform("io.helidon:helidon-dependencies:4.0.0"))
    api("io.helidon.webserver:helidon-webserver")
    api("io.helidon.webserver:helidon-webserver-http2")
    api("io.helidon.webserver:helidon-webserver-static-content")
    api("io.helidon.webserver:helidon-webserver-cors")
    api("io.helidon.webserver:helidon-webserver-websocket")
    // If the following two lines are commented out, webserver responds normally.
    api("io.helidon.http.encoding:helidon-http-encoding-gzip")
    api("io.helidon.http.encoding:helidon-http-encoding-deflate")

Visit the website with Chrome, url: http://localhost:60000/
Chrome waits for ever.

Commenting both gzip and deflate dependencies, allows the server to reply normally, without compression of course.