Introduction

Invokes connect-like middleware if / unless routing criteria match.

Inspired by the express-unless module. But a lot faster ;)

Main features

• Advanced routes matching capabilities. Uses find-my-way or any compatible router to match the routes.
• iff: execute middleware only if routing criteria is a match. Ideal use case: API gateways (see: fast-gateway)
• unless: execute middleware unless routing criteria is a match.
• Arbitraty chaining of iff -> unless of vice-versa.
• Low overhead, blazing fast implementation.

Usage

Install

npm i middleware-if-unless

Extending middleware

constiu=require('middleware-if-unless')()constmiddleware=function(req,res,next){res.body='hit'returnnext()}// extend middleware with iff/unless capabilitiesiu(middleware)

unless

Execute middleware unless routing criteria is a match:

constapp=require('express')()app.use(middleware.unless(['/not/allowed/to/hit']))...

In this example, all requests except [GET] /not/allowed/to/hit will cause the middleware to be executed.

iff

Execute middleware only if routing criteria is a match:

constapp=require('express')()app.use(middleware.iff([{methods: ['POST','DELETE','PUT','PATCH'],url: '/tasks/:id'}]))...

In this example, only a [POST|DELETE|PUT|PATCH] /tasks/:id request will cause the middleware to be executed.

More

• Website and documentation: https://iff-unless.21no.de