mjackson/mach

/**
 * A middleware that sets a default Content-Type header in case one hasn't
 * already been set in a downstream app.
 */
function contentType(app, defaultType) {
  defaultType = defaultType || 'text/html';

  return function (conn) {
    return conn.call(app).then(function () {
      var headers = conn.response.headers;

      if (!headers['Content-Type'])
        headers['Content-Type'] = defaultType;
    });
  };
}

module.exports = contentType;