Swagger not working if CORS enabled in Spring Webflux - spring-boot

Question

I have integrated swagger with spring webflux with below steps:
added gradle dependency
implementation("io.springfox:springfox-swagger2:3.0.0-SNAPSHOT")
declared Docket bean
import springfox.documentation.swagger2.annotations.EnableSwagger2WebFlux
#Configuration
#EnableSwagger2WebFlux
class SpringFoxConfig {
#Bean
fun api(): Docket {
return Docket(DocumentationType.SWAGGER_2)
.select()
.apis(RequestHandlerSelectors.any())
.paths(PathSelectors.any())
.build()
}
}
declared controller with swagger annotations
import io.swagger.annotations.Api
import org.springframework.web.bind.annotation.*
#RestController
#Api(value = "healthCheck", description = "API to check service heartbeat", tags = ["APIs"])
#RequestMapping("/spring/app")
class HealthCheckController {
#RequestMapping(method = [RequestMethod.GET, RequestMethod.POST], value = ["/ping"])
suspend fun ping(): String {
return "I am alive!"
}
}
Run the app and access url at /swagger-ui.html, it is showing swagger ui with rest endpoint
But it is showing white label error page with 404 when CORS are enabled with below code
import org.springframework.context.annotation.Configuration
import org.springframework.web.reactive.config.CorsRegistry
import org.springframework.web.reactive.config.EnableWebFlux
import org.springframework.web.reactive.config.WebFluxConfigurer
#Configuration
#EnableWebFlux
class WebConfig: WebFluxConfigurer
{
//Refer: https://spring.io/blog/2015/06/08/cors-support-in-spring-framework
override fun addCorsMappings(registry: CorsRegistry)
{
registry.addMapping("/**")
.allowedOrigins("*") // any host or put domain(s) here
.allowCredentials(false).maxAge(3600);
// .allowedMethods("GET, POST") // put the http verbs you want allow
// .allowedHeaders("Authorization") // put the http headers you want allow
}
}
Can someone help what i am doing wrong?