# File lib/rubyforge/client.rb, line 57
    def execute(request, uri, parameters = {}, headers = {}, userconfig = nil)
      {
        'content-type' => 'application/x-www-form-urlencoded'
      }.merge(headers).each { |k,v| request[k] = v }

      http = agent_class.new( uri.host, uri.port )

      if uri.scheme == 'https' && uri.host !~ /localhost/
       http.use_ssl      = true
       http.verify_mode  = OpenSSL::SSL::VERIFY_NONE
      end
      
      request.basic_auth(userconfig["username"], userconfig["password"])

      request_data = case request['Content-Type']
                     when /boundary=(.*)$/
                       boundary_data_for($1, parameters)
                     else
                       query_string_for(parameters)
                     end
      request['Content-Length'] = request_data.length.to_s

      response = http.request(request, request_data)

      return response.body if response.class <= Net::HTTPSuccess

      if response.class <= Net::HTTPRedirection
        location = response['Location']
        unless location =~ /^http/
          location = "#{uri.scheme}://#{uri.host}#{location}"
        end
        uri = URI.parse(location)

        execute(agent_class::Get.new(uri.request_uri), uri)
      end
    end