springboot前後端分離跨域問題之Request header參數取不到

背景：前後端分離項目，前端vue，後端springboot，本地調試時設置了跨域處理，前端生成的uuid後端從header裏面取不到。

解決辦法：如下是允許跨域，設置 corsConfiguration.addExposedHeader("uuid"); 放行uuid參數，這樣後端就可以獲取到了。

@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);
    }
}