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swagger ui - Why does springfox-swagger2 UI tell me "Unable to infer base url."

Why does springfox-swagger2 UI tell me Unable to infer base url. As far as I know, I am using a typical Swagger spring-boot configuration.

As you can see in the screenshot, the swagger-fox url backing the UI is example.com/api . NOTE: I get a standard Spring Whitelabel Error Page when I navigate to: https://localhost:9600/api/v2/api-docs/ . I suspect this is the root of the problem? I see no errors that Spring didn't load springfox-swagger2 and so I don't know why that isn't working.

enter image description here

My config looks something like this (and I have tried all sorts of variations of this config, from searching the net for advice):

@EnableSwagger2
@EnableWebMvc
@ComponentScan(basePackages = {"com.company.project"})
public class SwaggerConfig
{
    @Bean
    public Docket api() {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(Predicates.not(RequestHandlerSelectors.basePackage("org.springframework.boot")))
                .apis(Predicates.not(RequestHandlerSelectors.basePackage("org.springframework.cloud")))
                .apis(Predicates.not(RequestHandlerSelectors.basePackage("org.springframework.data.rest.webmvc")))
                .paths(PathSelectors.any())
                .build();
    }
}

And

<!-- to generate /swagger-ui.html -->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.7.0</version>
</dependency>

<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.7.0</version>
</dependency>

NOTE: Interestingly, when I try version 2.6.0, I don't get the modal popup but my Swagger UI shows 0 api content. So, i know that modal must be fairly new?

If there is not enough info here, leave me a comment.

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by (71.8m points)

I was able to resolve the issue by adding SpringBootApplication with annotation - as suggested by Mark :

@EnableSwagger2

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