package nl.fhict.happynews.api;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfigurerAdapter;

/**
 * Configuration of the API resources.
 */
@Configuration
@EnableResourceServer
public class ResourceServerConfig extends ResourceServerConfigurerAdapter {

    @Override
    public void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
            .antMatchers("/admin/**").hasAnyRole(WebSecurityConfig.Roles.ADMIN, WebSecurityConfig.Roles.EDITOR);
    }
}

package nl.fhict.happynews.api;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfigurerAdapter;
import org.springframework.web.cors.CorsUtils;

/**
 * Configuration of the API resources.
 */
@Configuration
@EnableResourceServer
public class ResourceServerConfig extends ResourceServerConfigurerAdapter {

    @Override
    public void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
            .requestMatchers(CorsUtils::isPreFlightRequest).permitAll()
            .antMatchers("/admin/**").hasAnyRole(WebSecurityConfig.Roles.ADMIN, WebSecurityConfig.Roles.EDITOR);
    }
}

Allow preflight checks