The request header parameter of springboot front-end separation cross-domain problem cannot be obtained

Background : Front-end and back-end separation projects, front-end vue, back-end springboot, cross-domain processing is set during local debugging, and the uuid back-end generated by the front-end cannot be obtained from the header.

Solution : The following is to allow cross-domain, setting corsConfiguration.addExposedHeader("uuid"); release the uuid parameter, so that the backend can get it.

@Configuration
public class CorsConfig {

    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.setMaxAge(3600L);
        corsConfiguration.setAllowCredentials(true);
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration corsConfiguration = buildConfig();
        corsConfiguration.addExposedHeader("uuid");
        source.registerCorsConfiguration("/**", corsConfiguration);
        return new CorsFilter(source);
    }
}