code: function getBase64 (url, fn, opt) {
    var m = /^(https?):\/\/([^:\/]+)(?::(\d+))?([^:]*)$/.exec(url);
    if (!opt) opt = {};
    if (m !== null) {
      http.get({host:m[2], port:parseInt(m[3]||80), path:m[4]}, function (res) {
        var buf = ''
        res.setEncoding('binary');
        res.on('data', function (data) { buf += data; });
        res.on('end', function () {
          // TODO: Get MIME type from headers
          fn(new Buffer(buf, 'binary').toString('base64'), imageinfo(buf));
        });
      });
    } else {
      if (url[0] === '/') {
        url = (opt.base ? opt.base+'/' : '')+url.slice(1);
      } else {
        url = (opt.rel ? opt.rel+'/' : '')+url;
      }
      // TODO: Fallback to file extension for MIME type
      fs.readFile(url, function (err, data) {
        fn(data.toString('base64'), imageinfo(data));
      });
    }
  }
docs: , mimes = { png:  'image/png' , gif:  'image/gif' , jpeg: 'image/jpeg' , jpg:  'image/jpeg' , ttf:  'font/ttf' , svg:  'image/svg+xml' } , types = [] ; for (var i in mimes) { types.push(i); }