Spring CORS Configuration

I was working on an application today trying to setup CORS in Spring 2.1.8 (I know its an older version of Spring) and it would not work. It turns out I needed to update it to at least 2.2.0. Along the way, I was not able to find really good examples of how to setup customized handlers. Here is an example which allow simple defaults.

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

@Configuration
public class ApplicationConfiguration  {

    @Bean
    CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration().applyPermitDefaultValues();
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }

    @Bean
    public CorsFilter corsFilter() {
        return new CorsFilter(corsConfigurationSource());
    }
}

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