在 JAX-RS 请求过滤器中添加响应 header

Question

I'm implementing rate limit filter in JAX-RS application (Websphere Liberty).

Main functionality will be in request filter (implementing ContainerRequestFilter interface), so I can deny request before it reaches endpoint.

However, I would also like to add response headers at the same time (eg X-RateLimit-Limit) in any case.

I would like to avoid writing separate ContainerResponseFilter for this purpose because performance reasons. I have all counters loaded already in Request filter.

Is there a clean way to include response headers in request filter for inclusion down the chain?

Answer 1

Solved by passing data in requestContext from request to response filter.