On Mon, Mar 23, 2015 at 4:19 PM, Robert Nagy <[email protected]> wrote:
> Rewriting the requests listed here 
> http://docs.couchdb.org/en/latest/api/document/attachments.html 
> <http://docs.couchdb.org/en/latest/api/document/attachments.html> should not 
> be a problem. However, I’m unsure whether there are any other attachment 
> related requests that we might need to take into account. I’m in particular 
> worried about the scenario where a CouchDB with internal attachments syncs up 
> with a database behind the proxy. What is the API for attachments during 
> sync/replication?

Here are the ways to bypass your proxy:

GET http://localhost:5984/db/doc?attachments=true
GET http://localhost:5984/db/_changes?include_docs=true&attachments=true
GET 
http://localhost:5984/db/_design/ddoc/_view/something?include_docs=true&attachments=true
GET http://localhost:5984/db/doc?open_revs=all ACCEPT: multipart/*

Replicator itself uses two ways to handle attachments:
0. Replicator fetches attachments using multipart request to /db/doc
resource with open_revs=[...] param;
1. Inline, when their size and amount are fits the inner
limitations[1]. Those who does been sent via POST /db/_bulk_docs
requests;
2. All the others are sent with multipart document update with PUT
/db/doc request.

So as you see, replicator will always bypass your proxy.

[1]: 
https://github.com/apache/couchdb-couch-replicator/blob/master/src/couch_replicator_worker.erl#L31-L32

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