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)
);