How do you configure CORS in a Spring Boot application?
Table of Contents
Introduction
Configuring CORS (Cross-Origin Resource Sharing) in a Spring Boot application is essential for allowing secure cross-origin requests from web applications. This guide covers various methods to enable CORS in your Spring Boot application, ensuring that your APIs can be accessed from different domains.
Configuring CORS in Spring Boot
1. Using @CrossOrigin Annotation
The @CrossOrigin annotation can be applied directly to controller classes or individual request mapping methods to specify which origins are allowed to access the resource.
Example: Using @CrossOrigin at Class Level
Example: Using @CrossOrigin at Method Level
2. Global CORS Configuration
If you want to configure CORS globally for all controllers in your Spring Boot application, you can do so by implementing the WebMvcConfigurer interface.
Example: Global CORS Configuration
3. CORS Configuration Using Properties
For basic CORS settings, you can also configure it using application properties. However, this method is limited compared to using @CrossOrigin or global configuration.
Example: application.properties
4. Security Configurations
If you are using Spring Security, you will need to ensure that CORS is configured within the security context as well.
Example: CORS Configuration with Spring Security
CORS Configuration Bean
Conclusion
Configuring CORS in a Spring Boot application is essential for managing cross-origin requests securely. By using the @CrossOrigin annotation, global CORS configurations, and integrating with Spring Security, you can effectively control which origins can access your APIs. Proper CORS configuration not only enhances security but also ensures a smooth experience for users accessing your web applications from different domains.