WebMvcConfig

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import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;


@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    private final Logger logger = LoggerFactory.getLogger(WebMvcConfig.class);

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("GET", "POST","OPTIONS")
                .allowedHeaders("*")
                .exposedHeaders("Access-Control-Allow-Headers",
                        "Access-Control-Allow-Methods",
                        "Access-Control-Allow-Origin",
                        "Access-Control-Max-Age",
                        "X-Frame-Options")
                .allowCredentials(false)
                .maxAge(3600);
    }

    
    /**
     * The bean shown in the preceding example registers any @ServerEndpoint
     * annotated beans with the underlying WebSocket container. When deployed to a
     * standalone servlet container, this role is performed by a servlet container
     * initializer, and the ServerEndpointExporter bean is not required.
     */
    @Bean
    public ServerEndpointExporter serverEndpointExporter() {
        return new ServerEndpointExporter();
    }
    
}

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