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https://issues.apache.org/jira/browse/COUCHDB-1368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13651331#comment-13651331
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Robert Newson commented on COUCHDB-1368:
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Hi Christopher,
The work here is to help cooperate better with other tools. CouchDB itself
should not be affected, since it doesn't reorder the JSON (and thus finds
things in the correct order). Can you reliably induce this between two official
1.3.0 releases?
> multipart/related document body doesn't identify which part is which
> attachment
> -------------------------------------------------------------------------------
>
> Key: COUCHDB-1368
> URL: https://issues.apache.org/jira/browse/COUCHDB-1368
> Project: CouchDB
> Issue Type: Bug
> Components: HTTP Interface
> Reporter: Jens Alfke
> Priority: Minor
>
> If you GET a document with attachments in multipart/related format (by adding
> ?attachments=true and setting Accept:multipart/related), the MIME bodies for
> the attachments have no headers. This makes it difficult to tell which one is
> which. Damien says they're in the same order that they appear in the
> document's "_attachments" object ... which is fine if you're Erlang, because
> Erlang preserves the order of keys in a JSON object, but no other JSON
> implementation I know of does that (because they use hashtables instead of
> linked lists.)
> The upshot is that any non-Erlang code trying to parse such a response will
> have to do some by-hand parsing of the JSON data to get the _attachment keys
> in order.
> This can be fixed by adding a "Content-ID" header to each attachment body,
> whose value is the filename. It would be nice if other standard headers were
> added too, like "Content-Type", "Content-Length", "Content-Encoding", as this
> would make it work better with existing MIME multipart libraries.
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