How to add cache-control to a @RestController servlet path?

Question

I have a servlet to offer images resources via spring:

@ResponseStatus(HttpStatus.OK)
@RequestMapping(value = "/thumbnails", method = RequestMethod.GET)
public ResponseEntity<InputStreamResource> getThumbnail(int id) {
    return service.find(id);
}

Resulting http headers: Cache-control: "max-age=0".

Question: how can I control the cache header just for that method?

Answer 1

I guess you can implement the check of the last modified, Spring has support for that - ref API

Something like

@ResponseStatus(HttpStatus.OK)
@RequestMapping(value = "/thumbnails", method = RequestMethod.GET)
public ResponseEntity<InputStreamResource> getThumbnail(int id) {


    youeObject = service.find(id);
    ResponseBuilder builder = Response.ok(youeObject);
    builder.cacheControl(CacheControl.maxAge(24, TimeUnit.HOURS)).cachePrivate());
    return builder.build();

}