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https://issues.apache.org/jira/browse/HTTPCLIENT-1010?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Felix Berger updated HTTPCLIENT-1010:
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Attachment: x-from-cache.patch
Patch addding X-From-Cache header.
> add an X-From-Cache header to responses that are served from the cache
> ----------------------------------------------------------------------
>
> Key: HTTPCLIENT-1010
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1010
> Project: HttpComponents HttpClient
> Issue Type: New Feature
> Components: Cache
> Affects Versions: 4.1 Alpha2
> Reporter: Felix Berger
> Attachments: x-from-cache.patch
>
>
> This allows the caller to find out if an actual connection has been made. One
> possible way of doing this is to add a custom header to resonses generated
> from the cache. The attached patch adds the header:
> X-From-Cache: true
> The use case where this is needed is when you want to know whether you are
> actually connected to the internet or whether contacted server is alive
> without generating extra out of order requests.
> I was also looking if it was possible to detect this by looking at the Via
> header, but it looks like the same header is added whether the response is
> served from the backend or the local cache.
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