MvcConfiguration.java

package com.gmail.merikbest2015.twitterspringreactjs.configuration;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class MvcConfiguration implements WebMvcConfigurer {

    @Value("${host.name}")
    private String hostname;

    @Bean
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/api/v1/**")
                .allowedOrigins("http://" + hostname)
                .allowedMethods("HEAD", "OPTIONS", "GET", "POST", "PUT", "PATCH", "DELETE")
                .exposedHeaders("page-total-count")
                .allowedHeaders("*");
    }
}