express-gateway/lib/policies/log/log.js

A microservices API gateway built on top of ExpressJS

const logger = require('./winston-logger');

module.exports = function (params) {
  if (!params || !params.message) {
    throw new Error('Log middleware requires "message" param');
  }

  return function (req, res, next) {
    try {
      logger.info(req.egContext.evaluateAsTemplateString(params.message));
    } catch (e) {
      logger.error('failed to build log message; ' + e.message);
    }
    next();
  };
};