Mimics the window.location parts when given a URL

Location-parts.js

twttr.klass('twttr.util.Location', function(url) {
  if (url.match(/^\/\//)) {
    url = 'http:' + url;
  } else if (!url.match(/^[a-z]+:\/\//)) {
    url = 'http://' + url;
  }
  var m = url.match(/^([a-z]+:)\/\/([\w\-\.]+)(\:\d+)?(.+)?/);
  this.href = url;
  this.protocol = m[1];
  this.hostname = m[2];
  this.host = m[2] + (m[3] || '');
  this.port = m[3] ? m[3].slice(1) : '80';
  this.extension = m[2].match(/\.(\w+)$/)[1];
  if (!m[4]) {
    this.hash = '';
    this.search = '';
    this.pathname = '/';
  } else {

    if (!m[4].match(/^\//)) {
      m[4] = '/' + m[4];
    }
    var query = m[4].split('?');
    var hash = m[4].split('#');

    this.pathname = query[0];
    if (!((/\/$/).test(this.pathname))) {
      this.pathname = this.pathname + '/';
    }

    this.search = query.length > 1 ? '?' + (function() {
      query.shift();
      return query.join('').replace(/#.+$/, '');
    }()) : '';

    this.hash = hash.length > 1 ? '#' + hash[1] : '';
  }
});