var fs = require('fs'),
    url = require('url');

    module.exports = function (rootDir, indexFile) {
    indexFile = indexFile || "index.html";
    rootDir = rootDir || '';
    var rootPart = rootDir.length > 0 ? rootDir + '/' : '';

    return function(req, res, next){
      var path = url.parse(req.url).pathname;

      fs.readFile('./' + rootDir + path, function(err, buf){
        if (!err) return next();

          fs.readFile('./' + rootPart + indexFile, function (error, buffer) {
            if (error) return next(error);

            resp = {
              headers: {
                  'Content-Type': 'text/html',
                  'Content-Length': buffer.length
              },
              body: buffer
            };
            res.writeHead(200, resp.headers);
            res.end(resp.body);
          });
        });
      }
    };