I understand how to make an http request using basic authentication with Ruby's rest-client
response = RestClient::Request.new(:method => :get, :url => @base_url + path, :user => @sid, :password => @token).execute
and how to post a file as multipart form data
RestClient.post '/data', :myfile => File.new("/path/to/image.jpg", 'rb')
but I can't seem to figure out how to combine the two in order to post a file to a server which requires basic authentication. Does anyone know what is the best way to create this request?