reversable-router

HTTP request router with named reversable routes

REVERSIBLE ROUTER IS DEPRECATED, USE ACTIVELY MAINTAINED FORK NAMED-ROUTES INSTEAD # reversable-router node.js module for routing HTTP requests. Can be used standalone or as part of express.js framework.

Feature overview:

  • Support for named routes
  • URLs can be generated by providing a name of the route and the required parameters
  • Support for optional parts in the route path (and URL generation still works with as many optional parts as you want)
  • Support for anonymous * parameters inside the path
  • Supports converting the last anonymous parameter to pairs of param=>value separated by /
  • Improved performance on literal matches
  • Supports callbacks for router parameters. Same logic as express native router.
  • Supports middleware route callbacks. Same logic as express native router.
  • Supports array of middleware route callbacks. Same logic as express native router.
  • Can be used standalone or as replacement for express.js routing.
npm install reversable-router
var express = require('express');
var app = express();
 
var Router = require('reversable-router');
var router = new Router();
router.extendExpress(app);
 
app.get('/admin/user/:id', 'admin.user.edit', function(reqresnext){
 var url = app._router.build('admin.user.edit', {id: 2}); // /admin/user/2 
});
 
//.. and a helper in the view files: 
url('admin.user.edit', {id: 2})
 

Alternatively to route a group of requests to the same URL but using a different HTTP method:

app.route('/admin/user/:id', 'admin.user.edit', function(){
 app.get(function(reqresnext) {
 // show.. 
 })
 app.post(function(reqresnext) {
 // insert.. 
 })
});
// or even: 
app.route('/admin/user/:id', 'admin.user.edit', {
 getfunction(reqresnext) {
 // show.. 
 },
 postfunction(reqresnext) {
 // insert.. 
 }
});
var Router = require('reversable-router')();
var router = new Router();
 
router.add('get', '/admin/user/:id', function() {
 var url = router.build('admin.user.edit', {id: 2}); // /admin/user/2 
}, {
 name: 'admin.user.edit'
});
 
//... 
router.dispatch(req);

You can easily check the current route in middleware without stating the defined route path. Thus avoding duplication and keeping route paths in a central place.

This allows the path to the route to be changed as frequently while the rest of the logic across middleware or views to remain the same.

Both example above incude a URL generation.

If you're using express:

// in the views: 
url('admin.user.edit', {id: 2})
// anywhere else: 
app._router.build('admin.user.edit', {id: 2})

If not:

router.build('admin.user.edit', {id: 2});

You can define routes like this:

app.get('/admin/(user/(edit/:id/)(album/:albumId/):session/)test', 'admin', function(reqresnext){
 console.log(req.params);
});

Brackets define the limits of the optional parts. Here you have 3 optional parts. 2 of them nested in the other.

If you don't pass all the parameters inside a optional part, the part will simply be removed from the generated URL.

So in the views:

url('admin', {id: 4, albumId:2, session: 'qwjdoqiwdasdj12asdiaji198a#asd'});
// will generate: /admin/user/edit/4/album/2/qwjdoqiwdasdj12asdiaji198a/test 
url('admin', {id: 4, session: 'qwjdoqiwdasdj12asdiaji198a#asd'});
// will generate: /admin/user/edit/4/qwjdoqiwdasdj12asdiaji198a/test 
url('admin', {albumId: 2, session: 'qwjdoqiwdasdj12asdiaji198a#asd'});
// will generate: /admin/user/album/2/qwjdoqiwdasdj12asdiaji198a/test 
url('admin', {id: 4, albumId:2);
// will generate: /admin/test 
// because :session parameter is missing and the optional part  
// that contains it contains also the other 2 parts 

Significant amount of the routes in an web applications are simply hardcoded strings. Things like /admin or /user/login. Such routes will be matched with direct check for equallity without the need for a regular expression execution.

app.get('/admin/*/user/*/:id/', 'admin.user.edit', function(reqresnext){
 console.log(req.params)
});

Requesting: /admin/any/user/thing/2 will output:

{
 _masked: [ 'any', 'thing'],
 id: '2'
}

Analogous in order to generate the same url:

url('admin.user.edit', {id:2, _masked: ['any','thing']})
app.get('/admin/*/user/*/:id/albums/*', 'admin.user.edit', function(reqresnext){
 console.log(req.params)
}, {
 wildcardInPairs: true
});

Requesting: /admin/any/user/thing/2/albums/sort/name/order/desc will output:

{
 _masked: [ 'any', 'thing'],
 id: '2',
 sort: 'name',
 order: 'desc'
}

Analogous in order to generate the same url:

url('admin.user.edit', {id:2, _masked: ['any','thing'], sort: 'name', 'order': 'desc'})
  • Organise and publish tests
  • Query based routing and generation

meta-routing Middleware depending on media? mobile, desktop, agent

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