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From "Paul Joseph Davis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COUCHDB-1368) multipart/related document body doesn't identify which part is which attachment
Date Wed, 05 Dec 2012 20:35:59 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-1368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13510737#comment-13510737
] 

Paul Joseph Davis commented on COUCHDB-1368:
--------------------------------------------

+1 on this. The only part I dislike is that length calculation, but given the current status
of that function I think its the least bad way to implement this.
                
> 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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