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index.js
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index.js
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'use strict'
// System Modules
const fs = require('fs')
, path = require('path')
, jsonfile = require('jsonfile')
// processEmiter
, processEmiter = require('./lib/process-emiter')
// Processing Modules
, DataModule = require('./lib/data-module')
, ConfigFileProcessor = require('./lib/config-file-processor')
, Router = require('./router');
const PATH_DEFAULT = path.resolve(__dirname, 'defaults/config.json')
let server
, activeErrorRestartJob
, defaults
, mode = process.argv[2] || 'production'
// Defaults
jsonfile.readFile(PATH_DEFAULT, function(err, obj) {
if (err) {
console.error('Error in Default Config', err.stack || err)
} else {
defaults = obj
let config
if (!process.send) {
config = JSON.parse(JSON.stringify(defaults))
}
server = new WebvisualServer(config)
}
})
class WebvisualServer extends processEmiter {
constructor(config) {
super(config, 'WebvisualServer')
process.send('ready');
this.mode = (config && config.mode) || mode
process.send( { log: `started in ${this.mode} mode ${process.argv}`} )
if (config) {
this.connect(config)
}
}
setConfig(config) {
if (this.isRunning === false) {
this.config = config;
} else {
this.reconnect(config);
}
}
validateConfig(config) {
this.config = config = config || this.config
return new Promise((resolve, reject) => {
if (!defaults) {
console.error('Could not load defaults')
reject()
}
if (!config) {
console.error('No settings are given')
reject()
}
if (this.isRunning)
this.disconnect()
// ensuring (with defaults) that a ssl encrypting (by self-signed key-pairs)
// is available for the http2 server
let sslSettings = JSON.parse(JSON.stringify(defaults.server.ssl)) // defaults
sslSettings.port = config.server.port || 443
let filepaths = {
cert: '',
key: '',
passphrase: ''
}
let ca = ''
let p = new Promise( (res, rej) => {
if ( config.server
&& config.server.ssl
&& config.server.ssl.cert
&& config.server.ssl.key
&& config.server.ssl.passphrase) {
filepaths.cert = path.resolve(config.server.ssl.cert)
filepaths.key = path.resolve(config.server.ssl.key)
filepaths.passphrase = path.resolve(config.server.ssl.passphrase)
if (config.server.ssl.ca) {
ca = path.resolve(config.server.ssl.ca)
}
} else {
rej( 'Given Filepaths to certificate-files incomplete' )
}
for (let kind in filepaths) {
fs.open(filepaths[kind], 'r', (err) => {
if (err) {
if (err.code === 'ENOENT') {
rej( `${filepaths[kind]} does not exist` )
return
} else {
rej( `${filepaths[kind]} Error accessing file\n${err}` )
}
} else {
res(ca)
}
})
}
})
Promise.resolve(p)
.then( () => {
sslSettings.key = fs.readFileSync(filepaths.key, 'utf8')
sslSettings.cert = fs.readFileSync(filepaths.cert, 'utf8')
let passphrase = JSON.parse(fs.readFileSync(filepaths.passphrase, 'utf8'))
sslSettings.passphrase = passphrase.password || passphrase;
sslSettings.rejectUnauthorized = false
sslSettings.requestCert = true
sslSettings.agent = false
if (ca) {
fs.stat(ca, function(err) {
if (!err) {
try {
// Read files for the certification path
const cert_chain = []
fs.readdirSync(ca).forEach( (filename) => {
cert_chain.push( fs.readFileSync( path.resolve(ca, filename), 'utf-8') )
})
sslSettings.ca = cert_chain
} catch (err) {
process.send( {
warn: err.stack,
info: `Cannot open ${ca} to read Certification chain\n${err}`
} )
}
} else {
process.send( {
warn: err.stack,
info: `Cannot open ${ca} to read Certification chain\n${err}`
} )
sslSettings.ca = null
}
resolve(sslSettings)
})
} else {
resolve(sslSettings)
}
})
.catch( err => {
process.send( {
error: err,
info: 'Encryption: using default selfsigned certificates.\nPlease ensure, that the certificate-files are valid and exist.\nIf so, restart the server, please.'
} )
let sslSettings = JSON.parse(JSON.stringify(defaults.server.ssl))
sslSettings.key = fs.readFileSync(sslSettings.key, 'utf8')
sslSettings.cert = fs.readFileSync(sslSettings.cert, 'utf8')
let passphrase = fs.readFileSync(filepaths.passphrase, 'utf8')
sslSettings.passphrase = passphrase.password || passphrase;
resolve(sslSettings)
})
})
}
connect(config) {
// connect the DATA-Module
if (this.isRunning === false) {
process.send( { info: 'WEBVISUAL SERVER is starting' } )
this.validateConfig(config)
.then(sslSettings => {
this.dataHandler = new DataModule()
this.dataHandler.on('error', err => { process.send( { error: err.stack } ) })
this.dataHandler.on('warn', msg => { process.send( { warn: msg } ) })
this.dataHandler.on('info', msg => { process.send( { info: msg } ) })
this.dataHandler.on('event', msg => { process.send( { event: msg } ) })
this.dataHandler.on('log', msg => { process.send( { log: msg } ) })
this.dataHandler.on('request_settings', kind => {
switch (kind) {
case 'io':
if (this.router && this.route.io) {
this.dataHandler.setServer(this.router.io)
} else {
console.error('Could not reset Socket Connections');
}
break
default:
}
})
this.router = new Router(this.mode)
this.router.on('error', err => { process.send( { error: err.stack } ) })
this.router.on('warn', msg => { process.send( { warn: msg } ) })
this.router.on('info', msg => { process.send( { info: msg } ) })
this.router.on('event', msg => { process.send( { event: msg } ) })
this.router.on('log', msg => { process.send( { log: msg } ) })
this.router.on('ready', () => {
this.dataHandler.setServer(this.router.io)
})
this.router.setSettings(this.config.server, this.config.configfiles, sslSettings)
this.configfilesHandler = new ConfigFileProcessor()
this.configfilesHandler.on('change', (con, facility) => {
this.dataHandler.setConfiguration(con, facility)
this.router.setConfiguration(con, facility)
})
this.configfilesHandler.watch(this.config.configfiles, this.config.database)
})
.then( () => {
this.router.connect()
this.isRunning = true
process.send( { event: 'server-start' } )
})
.catch( err => {
process.send( { error: `in Server Configuration \n ${err.stack}` } )
})
} else {
this.toggle(config)
}
}
disconnect() {
if (activeErrorRestartJob) {
clearTimeout( activeErrorRestartJob )
activeErrorRestartJob = null
}
if (this.router)
this.router.disconnect()
this.configfilesHandler.unwatch()
this.dataHandler.disconnect()
this.isRunning = false
process.send( { event: 'server-stop', info: 'WebvisualServer is closed' } )
}
reconnect(config) {
if (this.isRunning)
this.disconnect()
setTimeout(() => {
this.connect(config)
}, 2500)
}
toggle(config) {
if (activeErrorRestartJob) {
clearTimeout( activeErrorRestartJob )
activeErrorRestartJob = null
try {
this.disconnect()
} catch (err) {
process.send( { error: `Error in closing Server\n ${err}` } )
}
}
if (this.isRunning)
this.disconnect()
else
this.connect(config)
}
}