spark-monitor/main.js

A friendly user interface for monitoring Apache Spark

const qs = require('querystring')
const express = require('express')
const proxy = require('./proxy')

module.exports = ({port, livyHost, livyPort}) => {

	// Reverse proxy which enables cors for livy api
	const bridge = proxy({livyHost, livyPort})

	// Frontend server
	const app = express()
	app.disable('x-powered-by')

	// Serve contents
	app.use(express.static(__dirname + '/dist', {etag: false}))

	// Bridge for livy api
	app.all('/api/:path(*)', bridge.web.bind(bridge))

	// Otherwise, redirect all requests to root to beahave as a SPA
	app.all('*', (req, res, next) => res.sendFile(__dirname + '/dist/index.html'))

	app.start = () => app.listen(port||8998)

	return app

}