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Spring cloud gateway returns empty response

Addressing Spring Cloud Gateway's Empty Response Issue

In this blog post, we'll delve into the reasons why Spring Cloud Gateway might return an empty response and provide solutions to resolve this issue.

The problem often arises when attempting to redirect from one endpoint to another. Let's consider a scenario where your application exposes a /product/ endpoint and you want to redirect requests from /product-service/product to /product/ using Spring Cloud Gateway.

By default, Spring Cloud Gateway redirects URIs as they are. In this case, it would redirect http://localhost:5860/product-service/product to http://localhost:5861/product-service/product, resulting in an empty response.

To rectify this issue, we need to utilize the RewritePath filter, which enables us to modify the redirect path. Here's an example configuration that should resolve the empty response problem:

spring: cloud: gateway: routes: - id: product_service uri: localhost:5861/ predicates: - Path=/product-service/** filters: - RewritePath=/product-service/(?<segment>/?.*),$\{segment}

With this configuration in place, requests to /product-service/** will be redirected to /** on the product-service.

Alternatively, if you only need to redirect /product requests, you can use the following simplified configuration:

spring: cloud: gateway: routes: - id: product_service uri: http://localhost:5861/ predicates: - Path=/product

By implementing these solutions, you can ensure that Spring Cloud Gateway correctly redirects requests and returns meaningful responses.

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