OAuth2.0 - authentication using GitHub with front-end and back-end running on different servers. CORS error

Question

I\'m trying to create an application that has front-end and back-end assets separated. For the sake of example, let\'s say that front-end side will eventually be hosted on g

Answer 1

If you are using Spring-Boot you can do this in your spring configuration:

    @Bean
    public WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
                registry.addMapping("/**").allowedOrigins("http://localhost:8080", "http://127.0.0.1:8080");
            }
        };
    }