Glade gkweb

Nginx Cheat Sheet

(from Understanding Nginx Server and Location Block Selection Algorithms - https://goo.gl/YyzshP)

server {

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

Test credit card numbers to use when developing with Stripe

4242424242424242 Visa

4012888888881881 Visa

4000056655665556 Visa (debit)

Run NodeJS as a Service on Ubuntu 14.04 LTS

With Node you can write very fast JavaScript programs serverside. It's pretty easy to install Node, code your program, and run it. But > how do you make it run nicely in the background like a true server?

Go to /etc/init/
$ sudo vim yourapp.conf
Paste script.conf
$ sudo start yourapp
And when you wanna kill the process $ sudo stop yourapp

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

	var crypto = require("crypto");
	var path = require("path");
	var fs = require("fs");

	var encryptStringWithRsaPublicKey = function(toEncrypt, publicKeyInPemPath) {
	var absolutePath = path.resolve(publicKeyInPemPath);
	var publicKey = fs.readFileSync(absolutePath, "utf8");
	var buffer = Buffer.from(JSON.stringify(toEncrypt));
	var encrypted = crypto.publicEncrypt(publicKey, buffer);
	return encrypted.toString("base64");

	// RSA with node-forge
	"use strict";

	// npm install node-forge
	const forge = require("node-forge");

	new Promise((f, r) => forge.pki.rsa.generateKeyPair(
	2048, (err, pair) => err ? r(err) : f(pair)))
	.then(keypair => {
	const priv = keypair.privateKey;

	server {
	listen 443;
	server_name example.com;

	error_log /var/log/nginx/example_com_error.log warn;

	ssl on;
	ssl_certificate /etc/nginx/ssl/your.crt; #certificate chains
	ssl_certificate_key /etc/nginx/ssl/your.key; #private key