[GitHub] eiri opened a new issue #1226: Investigate how hard could it be to reintroduce etags in index's views.

[GitBox <gi...@apache.org>]

eiri opened a new issue #1226: Investigate  how hard could it be to reintroduce etags in index's views. 
URL: https://github.com/apache/couchdb/issues/1226
 
 
   We've removed etag header from views in Couch 2.0. It should be possible to construct consistent etag on fabric level, and return 304 if the etag matches the header.
   
   ## Expected Behavior
   View should return consistent Etag header. View should respect 'if-none-match' header.
   
   ## Current Behavior
   View doesn't return ETag header
   
   ## Possible Solution
   Robert Newson's idea from COUCHDB-2859 :
   
   > Here's an implementation idea that should be no more expensive than what we do today;
   > 
   >    1. delay the response until we have heard from one shard of each range (I believe we already added this, but do check)
   >    1. from this, construct the etag (we can change the workers to return more information along with their first rows (if any)
   >    1. send 304 if the etag matches the header
   
   ## References
   
      * [COUCHDB-2859](https://issues.apache.org/jira/browse/COUCHDB-2859)
      * apache/couchdb-chttpd#90
   

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