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nextjs-api-router

v1.0.0

Published

Lightweight tool to build clean restful API routes for your Next.js application.

Downloads

57,946

Readme

nextjs-api-router

Lightweight router class to build spotless (restful) API route handlers for your Next.js server application.

Installation

# npm
$ npm install next-js-api-router

# yarn
$ yarn add nextjs-api-router

Usage

First create a controller object that contains all handlers for the HTTP methods you want to handle on your specific route.

// API controller: controllers/example/index.ts

import type { Controller } from "nextjs-api-router";

const controller: Controller = {
  GET: (req, res) => {
    res.send("Hello world from nextjs-api-router!");
  },
  POST: (req, res) => {
    res.send(req.body);
  },
};

export default controller;

Import the controller in a new router class in the API handler file in /pages/api/%your-route%. Export the router.handle function by default to make your API work.

// API handler: pages/api/example.ts

import { Router } from "nextjs-api-router";
import controller from "../controllers/example";

const router = new Router(controller);
export default router.handle();

API

Router

The Router class manages the controller object inside the class itself. By instantiating it can optionally be given a controller object in the constructor.

The controller can be modifiied all time with the router.controller property of the class. For example:

router.controller.GET = (req, res) => {
  res.send("");
};

The router.handle function returns a function that handles the configured HTTP method handlers when sending a request to the server.

By passing handlers as arguments to the router.use method It's also possible to create middleware functions on the Router class. This middleware handler will be executed on every request to the route.

const router = new Router(controller);

const logger = (req, res, next) => {
  console.log(req.method, Date.now()
  next();
};

router.use(logger);

Controller

A controller object can be passed to the Router class constructor. It contains all the handlers for the HTTP methods used in the router. These handlers can be assigned singular or as an array (like middleware).

import type { Controller, Handler } from "nextjs-api-router";

const verify: Handler = (req, res, next) => {
    // do some verification here
    next();
}

const controller: Controller {
  // Just single handler functions
  GET: (req, res) => {res.send("Hello world!")},
  DELETE: (req, res) => {res.send("Goodbye world...")},

  // Multiple handlers
  POST: [verify, (req, res) => {
    res.send("You're verified now!")
  }],
}

Handler

The handler function is a function called inside the router. It has access to the request and the response of the server, and can be used as middleware, using the next parameter, to execute the next handler in series.

import { Router } from 'nextjs-api-router';
import type { Controller, Handler } from "nextjs-api-router";


const logger: Handler = (req, res, next) => {
  console.log(req.method, Date.now()
  next();
};

const reply: Handler = (req, res, next) => {
  res.send("You got this!")
};

const controller: Controller {
    GET: [logger, reply]
}

const router = new Router();

// Controller can also be passed in as parameter of the handle function
export default router.handle(controller);