GitHub user stevebest opened an issue:
https://github.com/apache/couchdb-nano/issues/36
Streamable multipart attachments are not supported
Consider a scenario when you want to upload a document and several
attachments to a CouchDB in a single request - a typical example would be
uploading a "Couchapp": a design doc with multiple HTML/JS/CSS attachments.
This scenario is [supported by CouchDB
API](http://docs.couchdb.org/en/1.6.1/api/document/common.html?highlight=multipart/related#creating-multiple-attachments)
using `Content-Type: multipart/related` request. Furthermore, you could expect
to leverage Node `Stream`s in order to avoid the necessity of buffering a bunch
of files in memory. Unfortunately, the combination of issues in CouchDB and
`request` prevents this.
1) CouchDB has [a nasty
bug](https://issues.apache.org/jira/browse/COUCHDB-2295) which prevents from
using `Transfer-Encoding: chunked` along with `Content-Type:
multipart/related`. It won't be fixed until `1.7`, and its status in `2.x`
branch is unknown.
2) `request` uses exactly the `Transfer-Encoding: chunked` to upload data
from `Stream`s. Uh-oh.
3) `request` could be told explicitly not to use `chunked` encoding - but
then you can't give it any `Stream`s! See [docs for a `multipart` option in
request(options,
callback)](https://github.com/request/request#requestoptions-callback). Bummer.
Technically, it should be possible to stream a bunch of attachments, in
case where one knows the length of the stream beforehand (which is not a
problem when you upload files from a disk). I attempted to add the support for
this case in dscape/nano#300, but failed miserably because `request` rightfully
thinks it's smarter than me.
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