hapi

hapi

A restful api server that separates your business logic from the server gears so you can focus on coding stuff.

Basic Usage

var hapi = require('hapi');

//create a server with a host, port, and options
var server = new hapi.Server.Server('localhost', 8088, {name:'sample', uri:'0.0.0.0'});

//define the function that returns our value (could be external to this file)
function sampleGet(hapi, reply) {
	reply('hello world');
}

//add the route
server.addRoute({
	path : '/sample',
	method : 'GET',
	handler : sampleGet,
	authentication: 'none'
});

//start the server
server.start();

Now navigate to http://localhost:8080/sample and you should receive 'hello world'

Routes

Configuration options

• path - endpoint (see Director for endpoint matching patterns )
• method - http method for routing endpoint
• handler - Function to handle request
• authentication - Type of authentication
• tos - Terms of Service required for that request
• query -
• schema -
• scope -

Wildcards

Wildcard declaration in routes are handled the same way as they are in Director or Express. Their retrieval on the handler is handled a little differently.

//when you add a route like this:
server.addRoute({
	path : '/luna/:album',
	method : 'GET',
	handler : albumRetrieve,
	authentication: 'none'
});

function albumRetrieve(hapi, reply) {
	//hapi.params will have the parameter
	console.log(hapi.params.album);
	reply(albumGet(hapi.params.album));
}

Handlers

Each handler needs two parameters, usually named 'hapi' and 'reply'.

• hapi - the first parameter. provides request information
• reply - function to call that takes a json body as a response

Middleware

hapi provides a few places where middleware can be added into the functions being called for each request. They are:

• onPreRoute - gets called before the request is routed.
• onPreHandler - gets called after the request has been routed before the assigned handler is called
• onPostHandler - gets called after the request headers
• onPostRoute - called after all the routes have been matched

Add them via the 'ext' portion of the options.

var server = new hapi.Server.Server('localhost', 8088, {name:'sample', uri:'0.0.0.0', ext: {onPreRoute:myPreRouteFunction}});

Utils

hapi provides a myriad of util functions for your use

• abort(message) - logs message to console and exits the process.
• checkEmail(email) - checks for a valid email address
• clone(obj) - clones an object or array
• decrypt(key, value) - decrypts value with AES Symmetric encription
• email(to, subject, text, html, callback) - sends an email to to with subject and content of text or html calling callback(err) when finished
• encrypt(key, value) - encrypts value with AES Symmetric encryption
• getTimeStamp() - gives a 'now' timestamp
• getRandomString(size) - returns a random string of size
• hide(object, definition) - removes hidden keys
• map(array, key) - turns an array into an object
• merge(target, source) - Merge all the properties of source into target; source wins in conflict
• unique(array, key) - removes duplicates from an array