multiview/node_modules/trouter

trouter

🐟 A fast, small-but-mighty, familiar ~fish~ router

Install

$ npm install --save trouter

Usage

const Trouter = require('trouter');
const router = new Trouter();

// Define all routes
router
  .get('/users', _ => {
    console.log('> Getting all users');
  })
  .add('POST', '/users', _ => {
    console.log('~> Adding a user');
  })
  .get('/users/:id', val => {
    console.log('~> Getting user with ID:', val);
  });

// Find a route definition
let obj = router.find('GET', '/users/123');
//=> obj.params ~> { id:123 }
//=> obj.handlers ~> Array<Function>

// Execute the handlers, passing value
obj.handlers.forEach(fn => {
  fn(obj.params.id);
});
//=> ~> Getting user with ID: 123

// Returns `false` if no match
router.find('DELETE', '/foo');
//=> false

API

Trouter()

Initializes a new Trouter instance. Currently accepts no options.

trouter.add(method, pattern, ...handlers)

Returns: self

Stores a method + pattern pairing internally, along with its handler(s).

method

Type: String

Any lowercased, valid HTTP/1.1 verb — choose from one of the following:

GET  HEAD  PATCH  OPTIONS  CONNECT  DELETE  TRACE  POST  PUT

pattern

Type: String

Unlike most router libraries, Trouter does not use RegExp to determine pathname matches. Instead, it uses string comparison which is much faster, but also limits the pattern complexity.

The supported pattern types are:

• static (/users)
• named parameters (/users/:id)
• nested parameters (/users/:id/books/:title)
• optional parameters (/users/:id?/books/:title?)
• any match / wildcards (/users/*)

handlers

Type: Array|Function

The function(s) that should be tied to this pattern.

Because this is a rest parameter, whatever you pass will always be cast to an Array.

Important: Trouter does not care what your function signature looks like!
You are not bound to the (req, res) standard, or even passing a Function at all!

trouter.all(pattern, ...handlers)

Returns: self

This is an alias for trouter.add('*', pattern, ...handlers), matching all HTTP methods.

Important: If the pattern used within all() exists for a specific method as well, then only the method-specific entry will be returned!

router.post('/hello', () => 'FROM POST');
router.add('GET', '/hello', () => 'FROM GET');
router.all('/hello', () => 'FROM ALL');

let { handlers } = router.find('GET', '/hello');
handlers[0]();
//=> 'FROM GET'

router.find('POST', '/hello').handlers[0]();
//=> 'FROM POST'

router.find('DELETE', '/hello').handlers[0]();
//=> 'FROM ALL'

router.find('PUT', '/hello').handlers[0]();
//=> 'FROM ALL'

trouter.METHOD(pattern, ...handlers)

This is an alias for trouter.add(METHOD, pattern, ...handlers), where METHOD is any lowercased HTTP verb.

const noop = _ => {}:
const app = new Trouter();

app.get('/users/:id', noop);
app.post('/users', noop);
app.patch('/users/:id', noop);

// less common methods too
app.trace('/foo', noop);
app.connect('/bar', noop);

trouter.find(method, url)

Returns: Object|Boolean
Searches within current instance for a method + pattern pairing that matches the current method + url.

This method will return false if no match is found. Otherwise it returns an Object with params and handlers keys.

• params — Object whose keys are the named parameters of your route pattern.
• handlers — Array containing the ...handlers provided to .add() or .METHOD()

method

Type: String

Any valid HTTP method name.

url

Type: String

The URL used to match against pattern definitions. This is typically req.url.

Benchmarks

Run on Node v8.9.0

GET / ON /
  --> 9,548,621 ops/sec ±0.65% (96 runs sampled)

POST /users ON /users
  --> 2,324,166 ops/sec ±0.52% (93 runs sampled)

GET /users/123 ON /users/:id
  --> 1,704,811 ops/sec ±0.50% (95 runs sampled)

PUT /users/123/books ON /users/:id/books/:title?
  --> 1,396,875 ops/sec ±0.14% (94 runs sampled)

DELETE /users/123/books/foo ON /users/:id/books/:title
  --> 1,266,708 ops/sec ±0.59% (95 runs sampled)

HEAD /hello on /hello -- via all()
  --> 1,641,558 ops/sec ±0.14% (96 runs sampled)

License

MIT © Luke Edwards