utility functions for commonly used http and browser context related functions, including:

• cookie(key,value,opt) - getter / setter of cookie.
  • if value is omitted, return the cookie corresponding to key.
  • return undefined if key is not found in cookie.
  • option: either a string for expiration date, or an object with cookie options such as:
    • expires
    • max-afge
    • path
• qs(key) - get value for key in querystring
  • return key-value pair hash if key is omitted.
  • return composed query string if key is a hash for key-value pairs.
  • return undefined if key is not found in query string.
• datefmt(date, opt) - date object formatter.
  • return a date string in YY/MM/DD hh:mm:ss format.
  • parameters:
    • date: either a number (epoch) or a Date object. Use new Date() if omitted.
    • opt: an option object with following fields:
      • time: show time if true. Default true if omitted.
      • invalid: placeholder text when the given date is invalid. undefined will be used if omitted.

MIT