spring boot put invalid cors request

To handle invalid CORS requests in a Spring Boot application, you can follow these steps:

1. Add the necessary dependencies: Ensure that you have the required dependencies in your project's build file, such as the spring-boot-starter-web dependency.

2. Enable CORS globally: To handle CORS globally for all endpoints in your application, you can create a configuration class and annotate it with @Configuration. Inside this class, create a bean of type WebMvcConfigurer and override the addCorsMappings method. Use the CorsRegistry object to configure the CORS mappings. For example:

@Configuration
public class CorsConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/")
                .allowedOrigins("*")
                .allowedMethods("*")
                .allowedHeaders("*");
    }
}

In the above example, allowedOrigins("") allows requests from all origins, allowedMethods("") allows all HTTP methods, and allowedHeaders("*") allows all headers. You can customize these settings based on your requirements.

1. Enable CORS for specific endpoints: If you want to enable CORS for specific endpoints only, you can annotate those methods or controllers with @CrossOrigin annotation. For example:

@RestController
public class MyController {

    @CrossOrigin(origins = "http://localhost:8080")
    @GetMapping("/api/data")
    public ResponseEntity<String> getData() {
        // Your code here
    }
}

In the above example, the @CrossOrigin annotation allows requests from http://localhost:8080 origin for the getData endpoint.

1. Test the CORS configuration: After implementing the above steps, you can test the CORS configuration by sending requests with different origins to your endpoints. If the configuration is correct, the server should respond to the requests without any CORS errors.

By following these steps, you should be able to handle invalid CORS requests in your Spring Boot application.