Application thinks quarkus.http.host is set to 0.0.0.0 in dev mode but it's set to localhost

[tamaro-skaljic]

Describe the bug

The documentation states that the default of quarkus.http.host is 'localhost' in dev/test mode and 0.0.0.0 in prod mode.

However the dev ui configuration form editor states it's set to 0.0.0.0 (and has no default value)

Therefore the application start up message includes a url to 0.0.0.0.

Interestingly, the application itself is made available via http://localhost:8080/ as written in the documentation, but the start up message and the Dev UI say something else. (When I click on the URL, there is of course an ERR_ADDRESS_INVALID error)

Expected behavior

The Dev UI Configuration Form Editor and the start up message should display the right host (localhost in dev/test mode).

Actual behavior

The Dev UI Configuration Form Editor and the start up message display '0.0.0.0' as quarkus.http.host but the application is available at host 'localhost'.

How to Reproduce?

https://code.quarkus.io/d?e=rest&cn=code.quarkus.io
./mvnw clean compile quarkus:dev

Output of uname -a or ver

Linux DESKTOP-CUA0DQ3 5.15.146.1-microsoft-standard-WSL2 #1 SMP Thu Jan 11 04:09:03 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

Output of java -version

openjdk version "17.0.9" 2023-10-17 OpenJDK Runtime Environment Temurin-17.0.9+9 (build 17.0.9+9) OpenJDK 64-Bit Server VM Temurin-17.0.9+9 (build 17.0.9+9, mixed mode, sharing)

Quarkus version or git rev

3.10.0

Build tool (ie. output of mvnw --version or gradlew --version)

apache-maven-3.9.5

Additional information

No response

[Eng-Fouad]

Quarkus uses 0.0.0.0 for WSL in dev/test mode, as per #22956

Maybe the Javadoc of HttpConfiguration.host needs to be updated. @geoand WDYT?

quarkus/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/HttpConfiguration.java

Lines 40 to 50 in 251439e

	/**
	* The HTTP host
	* <p>
	* In dev/test mode this defaults to localhost, in prod mode this defaults to 0.0.0.0
	* <p>
	* Defaulting to 0.0.0.0 makes it easier to deploy Quarkus to container, however it
	* is not suitable for dev/test mode as other people on the network can connect to your
	* development machine.
	*/
	@ConfigItem
	public String host;

[geoand]

Makes sense to me