A naukri.com initiative
Javacodegeeks
3w
365
Image Credit: Javacodegeeks
Configure CORS Policy for Spring Cloud Gateway
- Cross-Origin Resource Sharing (CORS) is a mechanism enabling web applications to interact with resources hosted on different domains. In this article, we will illustrate how to configure CORS policy for Spring Cloud Gateway.
- Spring Cloud Gateway is a popular API Gateway solution that routes and filters requests for modern microservices architectures. Its configuration also ensures that Single-page applications (SPAs) can securely access APIs hosted on different domains.
- To properly configure CORS policy in Spring Cloud Gateway, we must create beans that define a CORS policy and register that policy with all incoming requests. The CORS policy enables the server to allow specific origins, methods, and headers.
- We created two classes: Main class and Config class. The Main class is the entry class, while the Config class defines a bean used for configuring Cross-Origin Resource Sharing (CORS) in the application. The CORS policy enables the server to allow programmatically specific origins, methods, headers, and credentials, which are critical when serving APIs to frontend applications hosted on different domains.
- With Spring Cloud Gateway, routing rules for incoming requests can be defined in the Application.yml file. The file contains detailed information about Spring Cloud Gateway, routing rules for incoming requests, and server properties.
- To test the CORS policy being implemented, tools such as Postman or browser dev tools can be used. A GET request is made to http://localhost:8080/api/data from a client-side application that is served by a different domain. The Gateway then applies the CORS policy and forwards the request to the backend service running at http://localhost:8081/api/data. Finally, the backend service responds with a message.
- Configuring a CORS policy in Spring Cloud Gateway is essential for enabling secure and seamless communication between client applications and backend services.
- By following the steps outlined in this article, one can ensure their API Gateway is CORS-compliant while maintaining security and flexibility.
- Developers can include the Spring Cloud Gateway dependency in their pom.xml file and use Spring Boot to configure CORS.
- Lastly, implementing a CORS policy in Spring Cloud Gateway ensures that client applications, such as single-page applications (SPAs), can securely access APIs hosted on different domains, while maintaining security and flexibility.
Read Full Article
21 Likes
For uninterrupted reading, download the app