Deploying a multi-container React & Spring Boot system via Docker works locally but fails externally for login/register due to CORS issues.
Example CORS setup:
@Configuration
public class SimpleCorsConfig {
// custom CORS policy
}
In my experience, when backend responses are limited to localhost even after containerization, the issue often lies in the misconfiguration of permitted origins. I resolved a similar problem by ensuring that the Docker network allows the external address to be recognized as an allowed origin in my configuration. It was also necessary to double-check that the CORS mapping covered all required HTTP methods, especially when sending credentials like cookies. Revising the simple CORS configuration in Spring Boot with explicit origin declarations helped me overcome this challenge.
hey, i’ve been there. i fixed mine by adding the external ip along with localhost in my cors config. seems like spring was sticking to localhost by default. dunno if you’ll need a wildcard too, but give it a shot.
hey, im curi0us if anyone else had to tweak the header settings more than once. i noticed sometimes adding the full external domain in the config can help. wat do u think could be missng? lets chat more about this