Посвящается тем говноедам, которые не любят CoffeeScript.

request.coffee

request = require 'request'
rand = Math.floor(Math.random()*100000000).toString()

request(
	method: 'PUT'
	uri: 'http://mikeal.iriscouch.com/testjs/' + rand
	multipart: [
			'content-type': 'application/json'
			'body': JSON.stringify(
				foo: 'bar'
				_attachments:
					'message.txt':
						follows: true
						length: 18
						'content_type': 'text/plain'
			)
		,
			body: 'I am an attachment'
	]
	,
	(error, response, body) ->
		if response.statusCode is 201
			console.log "document saved as: http://mikeal.iriscouch.com/testjs/#{rand}"
		else
			console.log "error: #{response.statusCode}"
			console.log body
)

request.js

  var request = require('request')
    , rand = Math.floor(Math.random()*100000000).toString()
    ;
  request(
    { method: 'PUT'
    , uri: 'http://mikeal.iriscouch.com/testjs/' + rand
    , multipart:
      [ { 'content-type': 'application/json'
        ,  body: JSON.stringify({
            foo: 'bar'
          , _attachments: {
            'message.txt': {
                follows: true
              , length: 18
              , 'content_type': 'text/plain'
              }
            }
          })
        }
      , { body: 'I am an attachment' }
      ]
    }
  , function (error, response, body) {
      if(response.statusCode == 201){
        console.log('document saved as: http://mikeal.iriscouch.com/testjs/'+ rand)
      } else {
        console.log('error: '+ response.statusCode)
        console.log(body)
      }
    }
  )