The apache http client supports an optional cache layer

https://hc.apache.org/httpcomponents-client-4.5.x/current/tutorial/html/caching.html

where the cache is an application/server/content defined cache

https://github.com/Spantree/httpclient-cache-redis/blob/master/src/main/java/org/apache/http/impl/client/cache/redis/RedisHttpCacheStorage.java

the httpclient’s CacheResponseStatus should be added a key/value in the result

at the moment

• it’s only via a broadly defined cacheHandler, not configurable between individual calls https://github.com/lucee/Lucee/blob/6.0/core/src/main/java/lucee/runtime/tag/Http.java#L773

• it doesn’t respect http cache semantics (i.e. POST should never be cached, expires, no-cache headers etc) https://github.com/lucee/Lucee/blob/6.0/core/src/main/java/lucee/runtime/tag/Http.java#L1317

• it’s only opt in via cachedWithin (request/timestamp) https://docs.lucee.org/reference/tags/http.html#attribute-cachedwithin

• isn’t clearly documented

• returned cached results lack metadata indicating it was cached