[Spring] request url filter

requestUrlFilter.java

@Configuration
public class FilterConfiguration {

    @Bean
    public FilterRegistrationBean<CountryFilter> perfFilter() {
        FilterRegistrationBean<CountryFilter> registration = new FilterRegistrationBean<>();
        registration.setFilter(new CountryFilter());
        registration.addUrlPatterns("/*");

        return registration;
    }
}


@Component
public class CountryFilter implements Filter {
    @Value("${country}")
    String country;

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        List<Country> except = Country.except(Country.get(country));

        for(Country c : except) {
            String path = String.format("/%s/", StringUtils.lowerCase(c.name()));

            if(getUrl(request).contains(path)) {
                throw new IOException();
            }
        }

        chain.doFilter(request, response);
    }

    public static String getUrl(ServletRequest request) {
        if (!(request instanceof HttpServletRequest))
            return null;

        return getUrl((HttpServletRequest) request);
    }

    public static String getUrl(HttpServletRequest request) {
        StringBuffer requestURL = request.getRequestURL();
        String queryString = request.getQueryString();

        if (queryString == null)
            return requestURL.toString();

        return requestURL.append('?').append(queryString).toString();
    }
}