do_get (NetHTTPFetcher)

    # File lib/yadis/fetcher.rb, line 58
        def do_get(url, params, limit=5)
          if limit == 0
            return nil
          end
          begin
            uri = URI.parse(url)
            http = get_http_obj(uri)
            resp = http.request_get(uri.request_uri, params)
          rescue
            nil
          else
            case resp
            when Net::HTTPSuccess
              return [resp, URI.parse(url).to_s]
            when Net::HTTPRedirection
              return do_get(resp["location"], params, limit-1)
            else
              return nil
            end
          end
        end