middleware-container

$ npm install --save middleware-container

Overview

Middleware container extends the boxed-injector functionality for use with express middleware. The use case for this is when middleware chains get complex.

The problem that this package solves is:

• Simplifying declarativeness of common middleware packages (multiple middlewares used often around your app - why declare multiple times?)
• Middleware dependency chains (avoid having to declare multiple middleware functions on multiple routes, and having to maintain them in the correct order // with all sub-middlewares)
• Middleware redundancy (sometimes middlewares have dependencies that may get executed multiple times if not composed)

Usage

middleware-container is built on top of boxed-injector

 
const MiddlewareContainer = require('middleware-container');
const middlewares = new MiddlewareContainer();
 
middlewares.register('getOneThing', (req, res, next) => next());
 
middlewares.register('getAnotherThingThatDependsOnOneThing', (req, res, next) => next(), {
  depends: 'getOneThing'
});
 
middlewares.register('getSomethingThatDependsOnThePrevious', (req, res, next) => next(), {
  depends: 'getAnotherThingThatDependsOnOneThing'
});
 
// /foo will have the entire middleware chain executed
app.get('/foo', middlewares.get('getSomethingThatDependsOnThePrevious'), (req, res) => res.send(res.locals));