route.ninja

/ˈnɪndʒə/
	
	noun: ninja; plural noun: ninjas
	A person who excels in a particular skill or activity.

The best -and easiest- way to manage your routes in your Nodejs & Express applications.

You can cut to the chase and take a look at the test application (in the test directory)

Usage

Usually, when using Express you would find yourself doing something like this:

var express = require('express'),
	app = express();

app.get('/', function(req, res) {
	res.send('I am not as good as a Ninja.');
});

app.listen(3000);

which, if you have a lot of routes, can become quite a painful spaghetti sort of thing, and we have all been there.

Enter the Ninja

Install the Ninja:

npm install route.ninja

Require and summon the Ninja:

var ninja = require('route.ninja').with(express[, APP_PATH])

The express parameter is the actual Express library, APP_PATH is the path where you application resides. By default, the Ninja will try to find the directory where your application resides but it's recommended that you pass this value. You can easily do this with: __dirname.

Since version 0.0.20 the Ninja has support for timeout built right into it. You do not need to worry about installing the module or anything else, just tell the Ninja to use it:

var ninja = require('route.ninja').with(express[, APP_PATH]).timeout([time])

time; time in milliseconds. Defaults to 3000. It can also be a string accepted by the ms module.

And now, you are ready to do something like this:

var express = require('express'),
	ninja = require('route.ninja').with(express, __dirname).timeout(),
	app = ninja.app();

app.listen(3000);

You can also have the Ninja use any Express middleware, such as, for example; body-parser, cookie-parser or express-session:

var express = require('express'),
	bodyParser = require('body-parser')
	cookieParser = require('cookie-parser'),
	ninja = require('route.ninja'),
	app;

ninja.with(express, __dirname);
ninja.timeout();
ninja.use(bodyParser.json());
ninja.use(cookieParser());

/**
 * You could also chain the "use" method:
 * ninja.use(bodyParser.json()).use(cookieParser());
 *
 * Or simply pass each middleware as an argument to "use":
 * ninja.use(bodyParser.json(), cookieParser());
 */
 
/**
 * And, of course, you should not forget about your error handler.
 * If you do not provide an error handler the Ninja will use it's very basic own.
 * (Personally, I prefer named functions for the sake of debugging)
 */
ninja.use(function errorHandler (err, req, res, next) {
	res.status(404).send('Something went wrong on my side.');
});

app = ninja.app();

app.listen(3000);

Define your budo (routing logic)

/ˈbuːdəʊ/

	Budo is the code on which martial arts are all based.

As in any martial arts style, the Ninja requires a budo. You can create a budo.json file and tell the Ninja how to route the traffic for your application based on those rules:

{
	"routes": [
		{
			"<THE HTTP VERB>": "<YOUR RELATIVE URL>",
			"run": "<THE METHOD TO USE FOR THIS URL CALL>",
			"from": "<THE RELATIVE LOCATION OF THE METHOD'S DEFINITION>"
		}
	]
}

Let’s illustrate things a little. Say, for example, you want to:

• Make a GET request to your web server with the (relative) URL /style,
• Your Express application should respond to this call using the style method, found in the /controllers/ninja (/controllers/ninja.js) file. Your budo would look like this:

{
	"routes": [
		{
			"get": "/style",
			"run": "style",
			"from": "/controllers/ninja"
		}
	]
}

Note: All files where your code/methods are defined must be referenced relavitely to your application. In the above example; the file ninja.js resides in the controllers directory, which -in turn- resides at the same level as you application.

In Express syntax, this would translate into:

var express = require('express'),
	app = express(),
	ninja = require('./controllers/ninja');

app.get('/style', ninja.style);

app.listen(3000);

Routing through middleware

In some cases, you will want to run some middleware before your actual method. You can also define this in your budo.json file and the Ninja will take care of it. Middleware is useful, for example, when you want to filter, validate or process any incoming data.

{
	"pre": "/middleware/prepare",
	"routes": [
		{
			"get": "/style",
			"run": "style",
			"from": "/controllers/ninja",
			"via": [
				"pre.filter",
				"pre.validate"
			]
		}
	]
}

So, let's elaborate:

• The pre property must not be called pre, you can call it anything you like. This will just tell the Ninja which file holds the methods you want to run as middleware. In this case the methods are to be found in the /middleware/prepare (/middleware/prepare.js) file.
• The route object now holds an extra property; via, this tells the Ninja to run these methods before actually running the style method. This is also where you reference the pre you defined before. Your middleware will be run in the same order as specified in the array.

Again, in Express syntax, this would translate into:

var express = require('express'),
	app = express(),
	pre = require('./middleware/prepare')
	ninja = require('./controllers/ninja');

app.get('/style', pre.filter, pre.validate, ninja.style);

app.listen(3000);

Some basic examples using the new (short) syntax

Simplified way of running functions

{
	"get": "/style",
	"run": "/controllers/ninja.style"
}

Use middleware in a route without predefining it

{
	"get": "/style",
	"run": "/controllers/ninja.style",
	"via": [
		"/middleware/prepare.filter",
		"/middleware/prepare.validate"
	]
}

Multiple routes for the same HTTP verb

{
	"get": "/style, /technique, /doctrine",
	"run": "/controllers/ninja.style"
}

Multiple HTTP verbs for the same route

{
	"get, post, put": "/style",
	"run": "/controllers/ninja.style"
}

All of the above combined

{
	"get, post, put": "/style, /technique, /doctrine",
	"run": "/controllers/ninja.style",
	"via": [
		"/middleware/prepare.filter",
		"/middleware/prepare.validate"
	]
}

 

 

 

The Ninja used this logo was kindly provided by Nemo @ Pixabay