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REST APIs with Spring, JPA, and Springfox

ETags for REST APIs

Understand the concept of ETags and how to add ETag support in REST APIs using Spring's ShallowEtagHeaderFilter. Learn to check resource changes with ETags, interpret HTTP response codes 200 and 304, and optimize bandwidth by avoiding sending unchanged data in API responses.

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What is an ETag?

An ETagEntity-Tag is an HTTP response header to determine a specific version of a resource. It allows a web server to not send a complete response if the content has not changed. Therefore, an ETag improves web caching and saves bandwidth ...