shameful hack to add default namespace to handsoap

patched_handsoap_service.rb

module Handsoap
  class Service
    def invoke(action, options = { :soap_action => :auto }, &block) # :yields: Handsoap::XmlMason::Element
      if action
        if options.kind_of? String
          options = { :soap_action => options }
        end
        if options[:soap_action] == :auto
          options[:soap_action] = action.gsub(/^.+:/, "")
        elsif options[:soap_action] == :none
          options[:soap_action] = nil
        end
        doc = make_envelope do |body,header|
          if options[:soap_header]
            iterate_hash_array(header, options[:soap_header])
          end
          
          if options[:soap_body]
            action_hash = { action => options[:soap_body] }
            iterate_hash_array(body, action_hash)
          else
            body.add(action)
          end
          
          begin
            if default = body.get_namespace('xmlns')
              body.set_attr('xmlns', default)
            end
          rescue 
            nil
          end
        end
        if block_given?
          yield doc.find(action)
        end
        # ready to dispatch
        headers = {
          "Content-Type" => "#{self.request_content_type};charset=UTF-8"
        }
        headers["SOAPAction"] = options[:soap_action] unless options[:soap_action].nil?
        on_before_dispatch
        request = make_http_request(self.uri, doc.to_s, headers,options[:http_options])
        response = http_driver_instance.send_http_request(request)
        parse_http_response(response)
      end
    end
  end
end

this operation register with your default namespace

class MyService < Handsoap::Service
  endpoint SERVICE_ENDPOINT

  def on_create_document(doc) 
    doc.alias 'xmlns', 'http://something.com/
  end
end