function json() { } json.prototype = { id: "json", getQuery: function(sql, options) { return sql; }, getContentType: function(){ return "application/json; charset=utf-8"; }, getFileExtension: function() { return this.id; }, transform: function(result, options, callback) { var j = { time: options.total_time, total_rows: result.rowCount, rows: result.rows } callback(null, j); } }; module.exports = new json();