add multiple cross origin urls in spring boot

Question

I found an example on how to set cors headers in spring-boot application. Since we have many origins, I need to add them. Is the following valid?

@Configuration @EnableWebMvc public class WebConfig extends WebMvcConfigurerAdapter {      @Override     public void addCorsMappings(CorsRegistry registry) {         registry.addMapping("/api/**")             .allowedOrigins("http://domain1.com")             .allowedOrigins("http://domain2.com")             .allowedOrigins("http://domain3.com")     } } 

I have no way to test this unless it is used by three domains. But I want to make sure I have three origins set up and not only "domain3.com" is set.

EDIT: ideal use case for is to inject a list of domains(from application.properties) and set that in allowedOrigins. Is it possible

i.e

  @Value("${domainsList: not configured}")     private List<String> domains;  @Configuration @EnableWebMvc public class WebConfig extends WebMvcConfigurerAdapter {      @Override     public void addCorsMappings(CorsRegistry registry) {         registry.addMapping("/api/**")             .allowedOrigins(domains)     } } 

Answer 1

In Spring boot there is an annotation @CrossOrigin which will simply add header in the response.

1. For multiple: @CrossOrigin(origins = {"http://localhost:7777", "http://someserver:8080"}) @RequestMapping(value = "/abc", method = RequestMethod.GET) @ResponseBody public Object doSomething(){   ... }  2. If you wanna allow for everyone then simply use. @CrossOrigin