quarkus: Invalid handling of path segments in URLs by "quarkus-resteasy-reactive"

Describe the bug

It looks like path splitting by “quarkus-resteasy-reactive” is slightly broken (“quarkus-resteasy” works), for following case (explained earlier at SO https://stackoverflow.com/questions/76632028/discrepancy-between-reactive-and-non-reactive-quarkus-jax-rs-endpoints-wrt-url-d).

Endpoint like:

@ApplicationScoped
@Path("/path")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class PathResource
{
    @GET
    @Path("/list/{primaryKey: .+}")
    public String pathAsList(@PathParam("primaryKey") List<PathSegment> path)
    {
       return "As List/std (%d) -> %s".formatted(path.size(), path);
    }

when invoked with URL like:

http://localhost:8081/path/list/ab%2Fcd/ef%2Fgh

should produce List of 2 path elements; "ab/cd" and "ef/gh", but actually produces 4 (for “ab”, “cd”, “ef” and “gh”). This would be due to first decoding the full path and then splitting by slashes; as opposed to reverse.

I have Rest-assured tests to verify behavior difference (see https://github.com/tatu-at-datastax/quarkus-demo/blob/main/src/test/java/com/fasterxml/quarkus/PathResourceTest.java) but the call looks like:

    @Test
    public void pathAsList() {
        given()
          .when().get("/path/list/{seg1}/{seg2}", "ab/cd", "ef/gh")
          .then()
             .statusCode(200)
             .body(is("As List/std (2) -> [ab/cd, ef/gh]"));
    }

Result is passing test when running against “quarkus-resteasy”, but fail against “quarkus-resteasy-reactive”.

Expected behavior

Decoding of path parameter should split by non-encoded slashes first, then decode path segments; not decode full path and split by all slashes (encoded or not)

Actual behavior

Due to what appears to be pre-mature character entity decoding, path segments are split also by encoded slashes (%2F), not only plain un-encoded ones.

How to Reproduce?

Reproduction included in description, but there is also Github repo:

https://github.com/tatu-at-datastax/quarkus-resteasy-reactive-34586

Output of uname -a or ver

No response

Output of java -version

openjdk version “17.0.6” 2023-01-17 LTS

GraalVM version (if different from Java)

Not tested with graalVM

Quarkus version or git rev

3.2.0.Final

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

Apache Maven 3.8.4

Additional information

No response