Esrol-middlewares NPM

Provide a convenient mechanism for accessing requests and response. Register and iterate through the registered middlewares on request. When the last registered middleware is resolved, the passed route as argument is called.

Part of Esrol

Installation

$ npm install --save esrol-middlewares

Node Version Compatibility

Node Version
>= 4.x

Usage

'use strict';
let http = require('http');
let Middlewares = require ('esrol-middlewares');
let middlewares = new Middlewares();

middlewares.registerMiddleware({
  priority: 1,
  middleware: function(req, res, next){
    // some code
    req.iterator++;
    console.log ('step 1');
    next();
  }
});

middlewares.registerMiddleware({
  priority: 2,
  middleware: function(req, res, next) {
    // some code
    setTimeout(() => {
      // some code
      req.iterator++;
      console.log ('step 2');
      next();
    }, 1000);
  }
});

middlewares.registerMiddleware({
  priority: 3,
  middleware: function(req, res, next) {
    // some code
    req.iterator++;
    console.log ('step 3');
    next();
  }
});

let router = {
  route: function(req, res) {
    console.log ('Request passed through %s middlewares', req.iterator);
  }
};

http.createServer((req, res) => {
  req.iterator = 0;
  middlewares.onRequest(req, res, router.route, router);
}).listen(3333);
console.log('Server is listening on port: 3333');

Please see the docs here, for information how to use middlewares