parse_url

parse_url.coffee

# Parses a URL string, using the DOM
# 
# - href     - full URL
# - host     - sub.domain.tld:port
# - path     - /stuff
# - protocol - https:
# - port     - 80
# - search   - unparsed query string
# - query    - parsed query string
# - fullpath - path + query string
parse_url: (url) ->
    a = document.createElement "a"
    a.href = url
    
    return a =
        href    : a.href
        host    : a.host.replace(/^www./, '')
        # IE has a bug with leading slash on the path name,
        # we therefore replace the start of the pathname with a slash.
        # See http://stackoverflow.com/questions/616
        path    : a.pathname
        protocol: a.protocol
        port    : if a.port is '' then '80' else a.port
        search  : a.search
        query   : @decode_query a.search.substr(1)
        fullpath: a.href.substr(a.href.indexOf(a.host) + a.host.length)

# Parses a query string to an object
# Returns null if there's no query string.
decode_query: (q) ->
  return null if not q

  query = {}
  pairs = q.split "&"
  parts = (pair.split '=' for pair in pairs)
  for part in parts when part.length is 2
    query[part[0]] = decodeURI(part[1]) 
  return query