Enabling CORS in Spring Secondary Servlet - spring

Question

I am registering a secondary servlet using Spring boot's ServletRegistrationBean
#Configuration
public class CxfServletRegister {
#Bean
public ServletRegistrationBean getODataServletRegistrationBean() {
ServletRegistrationBean odataServletRegistrationBean = new ServletRegistrationBean(new CXFNonSpringJaxrsServlet(), "/odata.svc/*");
Map<String, String> initParameters = new HashMap<String, String>();
initParameters.put("javax.ws.rs.Application", "org.apache.olingo.odata2.core.rest.app.ODataApplication");
initParameters.put("org.apache.olingo.odata2.service.factory", "com.cce.utils.JPAServiceFactory");
odataServletRegistrationBean.setInitParameters(initParameters);
return odataServletRegistrationBean;
}
}
I am building an OData application using Apache Olingo. I want CORS to be enabled for my service.
How do I enable CORS for this servlet?
PS I have tried the WebConfigurer bean from the Spring: Getting Started guides
#Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurerAdapter() {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/greeting-javaconfig").allowedOrigins("*");
}
};
}
This doesn't work, probably because this is configuring spring web's default dispatcher servlet and not the additional servlet configured using the ServletRegistrationBean

Answer 1

I found a likely way to do it here:
https://spring.io/blog/2015/06/08/cors-support-in-spring-framework
#Configuration
public class MyConfiguration {
#Bean
public FilterRegistrationBean corsFilter() {
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
CorsConfiguration config = new CorsConfiguration();
config.setAllowCredentials(true);
config.addAllowedOrigin("http://domain1.com");
config.addAllowedHeader("*");
config.addAllowedMethod("*");
source.registerCorsConfiguration("/**", config);
FilterRegistrationBean bean = new FilterRegistrationBean(new CorsFilter(source));
bean.setOrder(0);
return bean;
}
}