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Date: Fri, 20 Aug 2010 10:54:17 -0400 (EDT)
From: "Jonathan Moore (JIRA)" <jira@apache.org>
To: dev@hc.apache.org
Subject: [jira] Commented: (HTTPCLIENT-982) Could we get a way to know if
 the response has been served from the cache or not ?
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    [ https://issues.apache.org/jira/browse/HTTPCLIENT-982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12900714#action_12900714 ] 

Jonathan Moore commented on HTTPCLIENT-982:
-------------------------------------------

The CachedHttpResponseGenerator sets an Age header and a Via header. Is that sufficient, or would you like to see something more explicitorRor example, we could add an extension header:

X-HttpClient-Cache: HIT
X-HttpClient-Cache: HIT, VALIDATED
X-HttpClient-Cache: HIT, REFRESHED
X-HttpClient-Cache: MISS
X-HttpClient-Cache: UNCACHEABLE

etc. 

Squid does something similar to this.

> Could we get a way to know if the response has been served from the cache or not ?
> ----------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-982
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-982
>             Project: HttpComponents HttpClient
>          Issue Type: New Feature
>          Components: Cache
>    Affects Versions: 4.1 Alpha2
>            Reporter: Vianney Carel
>            Priority: Trivial
>
> Is there a way to know if the response has been served from the cache or not ?
> That's an information which might be useful for monitoring the activity of the cache.
> If there's no current way, maybe a flag could be added in the request context whenever the response comes from the cache ... ?

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