x-easy
v3.0.0
Published
Make simple and modular, building a web application with express.
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X-Easy
This is a simple way to raise a server in Node.JS.
Module installation
npm install x-easy --save
// or
yarn add x-easy
Using Example
Simple start file
//<project_path>/index.js
require('x-easy')
// the default port is 3000
// global object call. possibilities:
// XEasy, xEasy, xeasy, XEASY
XEasy.createApplication('myApp', { // Options for initialize app. It's opcional
port: 3000, // default
enableWebsocket: false, // default
enableSession: false // default
secureKeys: {
key: './keyFile.key', // or './keyFile.pem'
cert: './certFile.crt', // or './certFile.pem'
ca: ['./ca1.crt', './ca2.crt'] // chain certificate or (ca: './ca.crt') single certificate
requestCert: false, // default
rejectUnauthorized: false // default
}
})
// addModule can load <project_path>/<module_name>/index.js, <project_path>/<module_name>/index.json,
// <project_path>/<module_name>.js and <project_path>/<module_name>.json
// file to load data
.addModule('data') // json file
// file to default settings
.addModule('config') // js file
// file for route settings
.addModule('routes') // js file
// file for websocket settings
.addModule('websocket') // js file
// method for creating channel between processes
.join('chat')
// start children process
/* 'auto' sets automatic scanning for the number of processor
** cores and creates processes for each of them
** .start('auto') with 6 cores start 6 process
**
** negative numbers subtract from the number of cores to
** generate the number of processes that at least 1
** .start(-2) with 6 cores start 4 process*/
.start(/* number of process, default is 1*/)
The loadModule function is used to instantiate objects in the application by passing it in the constructor.
//data.json
{
'data': 'something else',
'viewEngine': 'pug',
'viewEnginePath': 'pages'
}
//config.js
module.exports = class Config {
// order of the constructor parameters does not matter
constructor(app, modules) {
// event called when the process is exiting
app.callStop = () => {
//... stopping worker
}
// method that receives messages from channels between processes
app.addProcessMessageListener((channel, data) => {
// ...message processing
// channel attribute refers to the channel name or application name
})
// for password protection, this method transforms the hashed data
app.setParameterHash('pwd')
app.setParameterHash(
'password',
/* optional */ {
seed: 'secret', // default is ''
loop: 5 // default is 1
}
)
// children properties can also be digested
app.setParameterHash('user.password')
// method to take a public folder
app.setPublic('public')
// if there are subfolders
// app.setPublic('public/images')
// page rendering system
app.setViewEngine(modules.data.viewEngine)
app.setViewPath(modules.data.viewEnginePath)
// permission for accept upload of files
app.addUploadURLPermission('/upload')
}
}
//routes.js
module.exports = class Routes {
// again! order of the constructor parameters does not matter
constructor(modules, app) {
app.get('/', function(req, res) {
// Sending messages to all registered processes on this channel
app.sendProcessMessage(
'chat',
{ foo: 'foo' } /* worker id 'app.worker.id' */
) // the message has to be an object
// Sending messages to all processes on this application
app.sendAppProcessMessage({ foo: 'foo' } /* worker id 'app.worker.id' */) // the message has to be an object too
res.end('test ok - ' + req.query.test)
})
/** CAUTION **/
// the file will be loaded into RAM memory
app.post('/upload', (req, res) => {
// ... file upload process
// req.files.<form name>.name - file name
// req.files.<form name>.encoding - file encoding
// req.files.<form name>.mimetype - file mimetype
// req.files.<form name>.data - Buffer bytes
res.end('file upload success')
})
}
}
//websocket.js
const URL = require('url')
module.exports = class WebSocket {
// again! order of the constructor parameters does not matter
// the definition of possibilities is in the part of
// Constructor Parameters
constructor(wss) {
wss.on('request', req => {
// ... process req
if(false/**...process req...**/) req.reject()
const client = req.accept()
conn.on('message', msg => {
// ... process message
}
conn.on('close', () => {
// ... process close connection
})
})
}
}
The websocket api documentation is located on this link
Constructor Parameters
server // http server object
app // XEasy app control
name // application name entered in the creation
worker // child process control object
wss || websocketServer || wsServer // Websocket server
modules // list of added modules in application
digest // convert data into hash sha512