Express Request Headers

middleware.js

// Let Next.js handle rest of the routes
  function modifyResponseBody(req, res, next) {
     var oldSend = res.send;
    
    res.send = function (data) {
      // arguments[0] (or `data`) contains the response body
      arguments[0] = 'modified : ' + arguments[0];
      oldSend.apply(res, arguments);
    };
    res.on('finish', function () {
      console.log(
        `${new Date()} ${req.method} request received on ${req.url} with code ${
          this.statusCode
        } and Cache-Control ${res.get('Cache-Control')}`
      );
    });

   
    next();
  }