How deactivate CORS in a Spring Boot API (Version 2.2.6) - spring

Question

I am currently working on a React Front-End with an already existing Spring Boot Backend.
When developing locally i ran into the typicall CORS Error:
Access to fetch at 'http://localhost:8180/api/data/firms' from
origin 'https://localhost:8087' has been blocked by CORS policy:
Response to preflight request doesn't pass access control check:
No 'Access-Control-Allow-Origin' header is present on the requested resource.
If an opaque response serves your needs,
set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
runtime.js:98 GET http://localhost:8180/api/data/firms net::ERR_FAILED
I already tried most of the solutions mentioned in this post however nothing really helped. By adding one of these snippets
#Override
protected void configure(HttpSecurity http) throws Exception {
http.cors().configurationSource(request -> new CorsConfiguration().applyPermitDefaultValues());
}
#Bean
public FilterRegistrationBean<CorsFilter> corsFilterRegistrationBean() {
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", new CorsConfiguration().applyPermitDefaultValues());
FilterRegistrationBean<CorsFilter> bean = new FilterRegistrationBean<>(new CorsFilter(source));
bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
return bean;
}
or creating a CorsFilter the CORS Error was gone but now the API always returned a HTTP 500 Error.
Does anyone know a solution for my problem?

Answer 1

You can add this in your controller class.
#CrossOrigin(origins = "${cross.origin}")
#RestController
application.properties
cross.origin=https://localhost:8087

Answer 2

I've added new answer for Spring Boot.
Additionally, if you are using create-react-app, you will avoid CORS problem to set up proxy.
(In this case, it is not required to change Spring Boot settings.)
package.json:
"proxy": "http://localhost:8180",