Github user rnewson commented on the pull request:
https://github.com/apache/couchdb-chttpd/pull/111#issuecomment-206929118
Where do we promise that ETag is the _rev value? We have X-CouchDB-NewRev
when we intend to convey the new rev value, for example.
I like this change, it makes _local doc ETags work correctly. Clients can
cache based on this and their cache hits will be for the correct body content
(that's why rev and body are in the calculation, as both appear in the JSON
response body but are stored in separate fields of #doc{}).
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