Compatibility with new PathMatcher

[MatsLP]

Hello,

We are facing a problem when we try to use org.springdoc:springdoc-openapi-ui and enable the new PathMatcher in our webmvc application. The new PathMatcher is available for webmvc since spring-boot 2.4.0 and is intended to replace the AntMatcher.

When we add the WebMvcConfigurer that I appended at the end, we get an error that says:

Invalid mapping pattern detected: /**/swagger-ui/**
^
No more pattern data allowed after {*...} or ** pattern element

I think this might be related to an incompatibility that the spring-team mentions here: https://spring.io/blog/2020/06/30/url-matching-with-pathpattern-in-spring-mvc
Is springdocs compatible with mvc-applications that want to use the new PathPatter, or is this feature planned?

Kind regards and thank you for your work

Additional context

import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.method.HandlerTypePredicate;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.util.pattern.PathPatternParser;

@Configuration
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {

    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        configurer
                .setPatternParser(new PathPatternParser())
                .addPathPrefix("", HandlerTypePredicate.forAnnotation(RestController.class));
    }
}

[samotoo]

Hi,

We are having the same issue here. The PathPatternParser doesn't allow ** to appear in the middle, and will reject such pattern (see spring-projects/spring-boot#21694 for details).

It looks like the code here inserted a ** in the middle of the path pattern.

For reference WebFlux uses the PathPatternParser from its birth, so SwaggerWebFluxConfigurer doesn't insert ** in the middle of the path? Maybe SwaggerWebMvcConfigurer can borrow the implementation from SwaggerWebFluxConfigurer?

And many thanks to the author for bringing OpenAPI v3 to spring boot!