Toisu! router

The Toisu! router provides routing logic, using routing string like those of Express.

Usage

Internally the Toisu! router uses path-to-regexp. When adding routes, the options parameter is passed along to path-to-regexp. See that package for what forms the strings can take (this should be familiar to express users).

import Toisu from '@toisu/toisu';
import Router from '@toisu/router';
import http from 'http';

const app = new Toisu();
const router = new Router();

router.route('/some/resource/:id', {
  get: [middleware1, middleware2],
  post: [middleware3]
});

app.use(router.middleware);

http.createServer(app.requestHandler).listen(3000);

The methods for a route are given a list of middleware each. If the router handles a request which uses a method with no middlewares, then the router will respond with a 405 status code and an Accept header containing a list of methods which the router does have middlewares for.

Parameters distilled from a path are stored on the 'params' field of the context Map. i.e.

function middleware1(req, res) {
  const params = this.get('params');

  // etc.
}

Routed middleware functions are in every other respect the same as unrouted middleware functions, and receive the same context.

API

class Router

const router = new Router();

router.route(path, handlers, [options])

The optional options object is passed to path-to-regexp, which is responsible for parsing the path string. When a route and HTTP method match, parameters will be parsed from the string into an object, which is appended to the context map as this.get('params')

function middleware(req, res) {
  const params = this.get('params');

  console.log(params); // { someData: <determined by req.url> }
}

router.route('/some/test/path/:someData', {
  GET: [middleware]
});

middleware = router.middleware

This can be consumed by a Toisu! app.use call.

const app = new Toisu();

app.use(router.middleware);