Evan Kaufman EvanK

NOW MAINTAINED IN MY DOTFILES GITHUB REPO: http://git.io/zuH1MQ

How to purge ('ban') an entire domain in Varnish Cache 3

#####EDIT: NB Ban is technically different from Purge. Banned objects remain in memory but banning is faster than purging. Read the Varnish 3 documentation here and here.

Purge may be a more appropriate action for your use-case; although the examples in the gist below work, it's not necessarily the best way of doing this.

##The Good, The Bad, & The Ugly Ways of handling Async Operations With Javascript## #####Callbacks < Promises < Generators#####

###An Example: 5 in-sequence Async Operations### (also see parallel-sequence example: https://gist.github.com/willrstern/af3a3308fc5864cf48f8)

###The Ugly Way: Callbacks### After each function takes place, handle any errors & do the next thing - It's easy to walk through the code and understand what's going on...but it's ugly as sin

###The Issue With Forever Forever is great for running node services, with a minor setback: the word "forever" doesn't apply to system reboots.

###The solution, run node apps as a system service logged in as root

vim /etc/init/node-app.conf

Contents for node-app.conf

Configuring nginx for SSL SNI vhosts

Gotchas

Note that SHA2 hash algorithm may be not supported on older systems (Windows XP, Windows 2003, among others).
Be aware that mandatory https on SNI vhosts eliminate [Internet Explorer on Windows XP, among others] (http://en.wikipedia.org/wiki/Server_Name_Indication#Web_browsers.5B6.5D).

Remarks

My version of konklones SSL config does not have SPDY support(my nginx+openssl does not support it)
You need a default ssl server (example.org-default.conf).
Some SSL-options have to be unique across your instance, so it's easier to have them in a common file(ssl.conf).

	class User(db.Model):
	location = db.StringProperty()
	timezone = db.StringProperty(default='America/Los_Angeles')

	# Do this once per user
	def calculate_timezone(self):
	from simplegeo import Client
	client = Client('oauth key', 'oauth secret SHH')
	response = client.context.get_context_by_address(self.location)
	for feature in response['features']:

	# display red exit value if it isn't zero
	PROMPT_COMMAND='EXITVAL=$?; '$PROMPT_COMMAND
	GET_EXITVAL='$(if [[ $EXITVAL != 0 ]]; then echo -n "\[\e[37;41;01m\] $EXITVAL \[\e[0m\] "; fi)'
	export PS1="$GET_EXITVAL$PS1"

	FROM ubuntu:14.04

	ENV DEBIAN_FRONTEND noninteractive
	ENV HOME /root

	RUN apt-get -qq -y update
	RUN apt-get -qq -y install software-properties-common
	RUN apt-add-repository -y ppa:ansible/ansible
	RUN apt-get -qq -y update
	RUN apt-get -qq -y install ansible