CORS preflight request fails due to a standard header

Question

While debugging a CORS issue I am experiencing I\'ve found the following behaviour. Chrome makes the following OPTIONS preflight request (rewritten in CURL by Chrome itself)

Answer 1

I had the same issue. I've resolve it by adding 'OPTIONS' to allowed CORS methods in my Spring MVC configuration.

@Configuration
@EnableWebMvc
@ComponentScan
public class RestApiServletConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        super.addCorsMappings(registry);
        registry.addMapping("/**")
                .allowedOrigins("http://localhost:3000", "http://localhost:8080")
                .allowedMethods("GET", "PUT", "POST", "DELETE", "OPTIONS");
    }
}