nsolid-manager/nsolid/proxy/proxy.js

A manager that sets up and runs N|Solid for you

#!/usr/bin/env nsolid

'use strict'

process.title = 'nsolid-proxy'

var Listener = require('nsolid-listener')
var Routing = require('./router')
var debug = require('util').debuglog('nsolid')
var conf = require('rc')('nsolid-proxy')

if (conf.h || conf.help) {
  const helpFile = require('path').join(__dirname, 'help.txt')
  const helpText = require('fs').readFileSync(helpFile)
  console.error(String(helpText))
  process.exit(0)
}

if (conf.port == null) {
  usageError('Could not find configuration for port')
}

conf.port = String(conf.port)
const portPattern = /^(.*:)?\d+/
if (!conf.port.match(portPattern)) {
  usageError('Invalid port option value: ' + conf.port)
}

var listener = new Listener(conf.port)

listener.on('listening', function startRouter () {
  var registryUri = process.env.REGISTRY || conf.registry || ''
  debug('Connection to registry at: ', registryUri)
  var options = {
    etcd_host: registryUri,
    denied: conf.denied,
    broadcast_approved: conf.broadcast_approved
  }
  var router = new Routing(options)

  // Hub commands
  listener.on('ls', router.list.bind(router))

  // Everything else -- proxy
  listener.on('*', router.proxy.bind(router))
})

function gracefulShutdown (err) {
  if (err instanceof Error) {
    console.error('Graceful shutdown triggered due to error')
    console.error(err)
    console.error(err.stack)
  }
  console.log('Shutting down hub')
  listener.server.close()
  var wait = setTimeout(function () {
    console.error('Forcing shutdown after wait')
    process.exit(1)
  }, 5000)
  wait.unref()
}

process.on('uncaughtException', gracefulShutdown)
process.on('SIGINT', gracefulShutdown)
process.on('SIGTERM', gracefulShutdown)
process.on('SIGHUP', gracefulShutdown)

function usageError (message) {
  console.error(message)
  console.error('Use the "-h" option to display help on this command.')
  process.exit(1)
}