Refactor

server/bin/www.js

@@ -0,0 +1,89 @@
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+const app = require('../app')
+const debug = require('debug')('example:server')
+const fs = require('fs')
+const config = require('config')
+const tls = config.get('Server.tls')
+const http = require(tls ? 'https' : 'http')
+
+/**
+ * Get port from environment and store in Express.
+ */
+const port = normalizePort(config.get('Server.listeningPort'))
+app.set('port', port)
+
+let server = http.createServer(app)
+if (tls) {
+  const httpsOptions = {
+    key: fs.readFileSync(config.get('Server.tlsKey')),
+    cert: fs.readFileSync(config.get('Server.tlsCert'))
+  }
+
+  server = http.createServer(httpsOptions, app)
+}
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+server.listen(port)
+server.on('error', onError)
+server.on('listening', onListening)
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+function normalizePort (val) {
+  const port = parseInt(val, 10)
+
+  if (isNaN(port)) {
+    // named pipe
+    return val
+  }
+
+  if (port >= 0) {
+    // port number
+    return port
+  }
+
+  return false
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+function onError (error) {
+  if (error.syscall !== 'listen') {
+    throw error
+  }
+
+  const bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges')
+      process.exit(1)
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use')
+      process.exit(1)
+    default:
+      throw error
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+function onListening () {
+  const addr = server.address()
+  const bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port
+  debug('Listening on ' + bind)
+}