oleg-prikhodko

Handling Errors

Express.js makes it a breeze to handle errors in your routes.

Express lets you centralizes your error-handling through middleware.

Let's look at patterns for how to get the most out of your error-handling.

First, our error-handling middleware looks like this:

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

	#!/bin/sh

	# This is for an expressjs node app, it uses npm + bower packages and pm2 to start the app
	# [pm2](https://github.com/Unitech/pm2)
	# Assumes you've created a [bare git repo](https://git-scm.com/book/en/v2/Git-on-the-Server-Getting-Git-on-a-Server) with on your server with git init --bare

	# Adapted from http://javascript.tutorialhorizon.com/2014/08/17/push-to-deploy-a-nodejs-application-using-git-hooks/
	PORT=1337
	APP_NAME="app-name"
	APP_ROOT="/var/www/app"

	# Basic example
	siege -t60s -c20 -d10 'http://robertomurray.co.uk/'

	# Basic auth;
	auth=$(echo -n 'username:password' \| openssl base64)
	siege -t60s -c20 -d10 --header="Authorization:Basic $auth" 'https://staging.a-hostname.co.uk/'

	var os = require("os");

	//Create function to get CPU information
	function cpuAverage() {

	//Initialise sum of idle and time of cores and fetch CPU info
	var totalIdle = 0, totalTick = 0;
	var cpus = os.cpus();

	//Loop through CPU cores