express-router-log-requests-to-file/app.js

Express log router (middleware)

// Import.
const JsonLogFile = require('json-log-file');

// Constants.
const REQUESTS_LOG_FILE_PATH = 'requests.log';

// Init.
const log = new JsonLogFile(REQUESTS_LOG_FILE_PATH, { addTimestamp: false });

// Define router.
function router(req, res, next) {
  // Log request.
  log.save({ method: req.method, originalUrl: req.originalUrl, remoteAddress: req.connection.remoteAddress }, 'http-request');

  // Go next.
  next();
}

// Export.
module.exports = router;