[
https://issues.apache.org/jira/browse/HTTPCLIENT-1290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13545822#comment-13545822
]
Jon Moore commented on HTTPCLIENT-1290:
---------------------------------------
Actually, in particular, see 13.4 of RFC 2616:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.4
"A response received with a status code of 200, 203, 206, 300, 301 or 410 MAY
be stored by a cache and used in reply to a subsequent request, subject to the
expiration mechanism, unless a cache-control directive prohibits caching.
However, a cache that does not support the Range and Content-Range headers MUST
NOT cache 206 (Partial Content) responses.
A response received with any other status code (e.g. status codes 302 and 307)
MUST NOT be returned in a reply to a subsequent request unless there are
cache-control directives or another header(s) that explicitly allow it. For
example, these include the following: an Expires header (section 14.21); a
"max-age", "s-maxage", "must- revalidate", "proxy-revalidate", "public" or
"private" cache-control directive (section 14.9)."
So I think the headers on the first 304 response from the origin are critical
to the discussion.
> 304 cached response never reused with If-modified-since conditional requests
> ----------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1290
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1290
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: Cache
> Affects Versions: 4.2.3
> Reporter: Francois-Xavier Bonnet
>
> Steps to reproduce the problem:
> - cache is empty
> - send a conditional If-modified-since request
> - backend server responds with a 304 Not modified (the response does not
> contain the "Last-modified" header, this conforms to rfc 2616 chapter 10.3.5)
> - the response is stored in the cache
> - send another conditional If-modified-since request
> - as the cache entry does not contain a Last-modified header to match with
> the If-modified-since request header, the cache considers the entry cannot be
> used and sends a request again to the backend server
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
