connect-middleware-ssi

gulp.task('connect', function() {
  connect.server({
    port: 8888,
    middleware: function (connect, opt) {
      return [
        function (req, res, next) {
          var urlobj = url.parse(req.url);
          var filename = __dirname + urlobj.pathname + (urlobj.pathname.substr(-1) === '/' ? 'index.html' : '');

          if (!filename.match(/\.s?html$/)) {
            next();
          } else {
            res.end(ssi.parse(filename, fs.readFileSync(filename, {encoding: 'utf8'})).contents);
          }
        }
      ];
    }
  });
});