index.js

'use strict';
/**
 * [STATUS_CODES description]
 * @type {Object}
 */
const STATUS_CODES = {
  2: 32,
  3: 36,
  4: 33,
  5: 31
};
/**
 * [color description]
 * @param  {[type]} str [description]
 * @param  {[type]} c   [description]
 * @return {[type]}     [description]
 */
function color(str, c){
  return "\x1b[" + c + "m" + str + "\x1b[0m";
};

// logger
module.exports = function(req, res, next){
  var err    = null;
  var end    = res.end;
  var start  = new Date;
  var respod = false;
  function commit(){
    var cc = STATUS_CODES[ res.statusCode / 100 | 0 ];
    console.log(
      err && !respod ? '-x' : '->'    ,
      color(req.method                , 35),
      color(req.url                   , 90),
      color(res.statusCode            , cc),
      color((new Date - start) + "ms" , 90)
    );
  };
  /**
   * [function description]
   * @return {[type]} [description]
   */
  res.end = function(){
    respod = true;
    end.apply(res, arguments);
    commit();
  };
  try{
    next();
  }catch(e){
    err = e;
    if(!respod){
      res.statusCode = 500;
      commit();
    }
    throw err;
  }
};