Spring boot webjars not generated, Http 406 returned

Question

For some reason bootstrap webjars are not being copied into target, and for that reason they cannot be found.

pom.xml

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.4.RELEASE</version>
</parent>

...

<dependency>
        <groupId>org.webjars</groupId>
        <artifactId>bootstrap</artifactId>
        <version>4.1.3</version>
</dependency>

Resource handlers:

@Configuration
@EnableWebMvc
public class WebConfiguration implements WebMvcConfigurer {

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/resources/**").addResourceLocations("/WEB-INF/resources/*");
    registry.addResourceHandler("/resources/").addResourceLocations("/resources/");
    registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
}
}

Somewhere in my static resources

...
<script src="webjars/bootstrap/4.1.3/js/bootstrap.min.js"></script>
...

Nothing is generated into /target Any idea what am I missing? I spend few hours on this and also reached second page on google searches.

That all seems like it should work. But it isn't quite consistent with what you need to do for Spring Boot. Check out: https://www.webjars.org/documentation#springboot — James Ward, Aug 15 '18 at 04:50
@JamesWard I double checked with the linked you sent. Results are exactly the same. I also changed into `version agnostic` approach with new dependency, however it does exactly the same. What you mean by saying its not consistent? — krzakov, Aug 15 '18 at 09:43
Remove the `WebConfiguration`, Spring Boot already takes care of all that and you are basically disabling parts of Spring Boot pautoconfiguration with that config. — M. Deinum, Aug 15 '18 at 12:06

score 2 · Accepted Answer · answered Aug 15 '18 at 12:03

I will answer my own question.

I would never tell that could be a problem but apparently @GetMapping annotation broke my UI. I still didn't figure it out what was the problem. I just found solution.

So I used Thymeleaf to resolve my views

@Controller
public class ViewController {

    @GetMapping("/")
    public String home() {
        return "/home";
    }
}

And apparently it clashes when I use traditional Restful controller

@RestController(value = "/face-detection")
public class FaceDetectController {

@GetMapping(produces = MediaType.APPLICATION_JSON_VALUE) {
...

This single @GetMapping was breaking entire UI. What I had to do was simply add / in the mapping

@GetMapping(value ="/", produces = MediaType.APPLICATION_JSON_VALUE)

And the whole thing magically started to work. Similar issue somewhere deep in the github: https://github.com/springfox/springfox/issues/1647

Spring boot webjars not generated, Http 406 returned

1 Answers1