Swagger2 ui not accessbile - spring

Question

I am using Swagger in a Spring boot application,
I somehow can access most of Swagger's endpoints such as /v2/api-docs, /swagger-resources but I can't figure out why /swagger-ui.html is not accessible.
I am using these dependencies:
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
</dependency>
here is my Swagger Config class:
#Configuration
#EnableSwagger2
public class SwaggerConfig {
#Bean
public Docket api() {
return new Docket(DocumentationType.SWAGGER_2)
.select()
.apis(RequestHandlerSelectors.basePackage("app.controllers"))
.paths(PathSelectors.any())
.build();
}
}
Here is the interesting part of the log:
2017-12-27 14:12:09.896 DEBUG 10212 --- [nio-8080-exec-1] o.s.security.web.FilterChainProxy : /springfox/swagger-ui.html at position 12 of 13 in additional filter chain; firing Filter: 'ExceptionTranslationFilter'
2017-12-27 14:12:09.896 DEBUG 10212 --- [nio-8080-exec-1] o.s.security.web.FilterChainProxy : /springfox/swagger-ui.html at position 13 of 13 in additional filter chain; firing Filter: 'FilterSecurityInterceptor'
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Checking match of request : '/springfox/swagger-ui.html'; against '/'
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Checking match of request : '/springfox/swagger-ui.html'; against '/v2/api-docs'
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Checking match of request : '/springfox/swagger-ui.html'; against '/configuration/ui'
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Checking match of request : '/springfox/swagger-ui.html'; against '/swagger-resources'
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Checking match of request : '/springfox/swagger-ui.html'; against '/configuration/security'
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Checking match of request : '/springfox/swagger-ui.html'; against '/swagger-ui.html'
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Checking match of request : '/springfox/swagger-ui.html'; against '/webjars/**'
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Request 'GET /springfox/swagger-ui.html' doesn't match 'POST /login
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.a.i.FilterSecurityInterceptor : Secure object: FilterInvocation: URL: /springfox/swagger-ui.html; Attributes: [authenticated]
2017-12-27 14:12:09.897 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.a.i.FilterSecurityInterceptor : Previously Authenticated: org.springframework.security.authentication.UsernamePasswordAuthenticationToken#8f3b828e: Principal: 0001; Credentials: [PROTECTED]; Authenticated: true; Details: null; Granted Authorities: ROLE_ADMIN, ROLE_USER
2017-12-27 14:12:09.903 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.access.vote.AffirmativeBased : Voter: org.springframework.security.web.access.expression.WebExpressionVoter#45d0a23, returned: 1
2017-12-27 14:12:09.903 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.a.i.FilterSecurityInterceptor : Authorization successful
2017-12-27 14:12:09.903 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.a.i.FilterSecurityInterceptor : RunAsManager did not change Authentication object
2017-12-27 14:12:09.903 DEBUG 10212 --- [nio-8080-exec-1] o.s.security.web.FilterChainProxy : /springfox/swagger-ui.html reached end of additional filter chain; proceeding with original chain
2017-12-27 14:12:09.904 DEBUG 10212 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : DispatcherServlet with name 'dispatcherServlet' processing GET request for [/springfox/swagger-ui.html]
2017-12-27 14:12:09.906 DEBUG 10212 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Looking up handler method for path /springfox/swagger-ui.html
2017-12-27 14:12:09.919 DEBUG 10212 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported
2017-12-27 14:12:09.920 DEBUG 10212 --- [nio-8080-exec-1] .w.s.m.a.ResponseStatusExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported
2017-12-27 14:12:09.920 DEBUG 10212 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported
2017-12-27 14:12:09.920 WARN 10212 --- [nio-8080-exec-1] o.s.web.servlet.PageNotFound : Request method 'GET' not supported
2017-12-27 14:12:09.921 DEBUG 10212 --- [nio-8080-exec-1] w.c.HttpSessionSecurityContextRepository : SecurityContext 'org.springframework.security.core.context.SecurityContextImpl#8f3b828e: Authentication: org.springframework.security.authentication.UsernamePasswordAuthenticationToken#8f3b828e: Principal: 0001; Credentials: [PROTECTED]; Authenticated: true; Details: null; Granted Authorities: ROLE_ADMIN, ROLE_USER' stored to HttpSession: 'org.apache.catalina.session.StandardSessionFacade#3bcccd7c
2017-12-27 14:12:09.921 DEBUG 10212 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
2017-12-27 14:12:09.921 DEBUG 10212 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Successfully completed request
2017-12-27 14:12:09.922 DEBUG 10212 --- [nio-8080-exec-1] o.s.b.f.s.DefaultListableBeanFactory : Returning cached instance of singleton bean 'delegatingApplicationListener'
2017-12-27 14:12:09.923 DEBUG 10212 --- [nio-8080-exec-1] o.s.s.w.a.ExceptionTranslationFilter : Chain processed normally
2017-12-27 14:12:09.923 DEBUG 10212 --- [nio-8080-exec-1] s.s.w.c.SecurityContextPersistenceFilter : SecurityContextHolder now cleared, as request processing completed
2017-12-27 14:12:09.923 DEBUG 10212 --- [nio-8080-exec-1] o.s.b.w.f.OrderedRequestContextFilter : Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade#203209de
2017-12-27 14:12:09.923 DEBUG 10212 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost] : Processing ErrorPage[errorCode=0, location=/error]
2017-12-27 14:12:09.928 DEBUG 10212 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : DispatcherServlet with name 'dispatcherServlet' processing GET request for [/error]
2017-12-27 14:12:09.928 DEBUG 10212 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Looking up handler method for path /error
2017-12-27 14:12:09.930 DEBUG 10212 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Returning handler method [public org.springframework.http.ResponseEntity io.xhub.secusid.exception.SecusidErrorHandler.error(javax.servlet.http.HttpServletRequest)]
2017-12-27 14:12:09.930 DEBUG 10212 --- [nio-8080-exec-1] o.s.b.f.s.DefaultListableBeanFactory : Returning cached instance of singleton bean 'secusidErrorHandler'
2017-12-27 14:12:09.930 DEBUG 10212 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Last-Modified value for [/error] is: -1
2017-12-27 14:12:09.943 DEBUG 10212 --- [nio-8080-exec-1] i.x.s.exception.SecusidErrorHandler : Request method 'GET' not supported
org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported

Answer 1

Try adding a class like this
#Configuration
public class WebMvcConfiguration extends WebMvcConfigurationSupport {
#Override
public void addResourceHandlers(final ResourceHandlerRegistry registry) {
// Make Swagger meta-data available via <baseURL>/v2/api-docs/
registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
// Make Swagger UI available via <baseURL>/swagger-ui.html
registry.addResourceHandler("/**").addResourceLocations("classpath:/META-INF/resources/");
}
}