Gert Goet eval

A Capistrano Rails Guide

by Jonathan Rochkind, http://bibwild.wordpress.com

why cap?

Capistrano automates pushing out a new version of your application to a deployment location.

I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".

Examples of RESTful API calls for E-commerce platforms

These examples are type 3 RESTful API requests and responses. The JSON-HAL specification is used to implement HATEOAS.

Some of the examples are based on my work as architect of the RESTful API at http://www.hautelook.com. All proprietary information has been removed.

Relevant links

JSON-HAL specification: http://stateless.co/hal_specification.html#media_type_identifiers
JSON linking with HAL: http://blog.stateless.co/post/13296666138/json-linking-with-hal

I want to get off Gmail for two reasons:

my own *@mislav.net address
to get my email under my own control so I can write scripts to process/analyze it

I've asked on Twitter what software should I use.
Here are the aggregated suggestions.

SMTP

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

Hey! I saw this has been indexed by the search engines. It is a first draft of a post I ended up publishing on my blog at: Scaling PostgreSQL With Pgpool and PgBouncer

Thanks for stopping by!

PostgreSQL and Pgpool Architecture

The Hunt for the right HTTP library

Use case: Travis CLI. One command invokes one or more sequential HTTP requests.

Note that startup time and the first request are very significant for a command line tool like this.

Clone the repo if you want to follow along.

Note: numbers might be due to how libraries are used (via faraday)

	# based on http://uberblo.gs/2011/06/high-performance-url-shortening-with-redis-backed-nginx
	# using code from http://stackoverflow.com/questions/3554315/lua-base-converter

	# "database scheme"
	# database 0: id ~> url
	# database 1: id ~> hits
	# database 2: id ~> [{referer\|user_agent}]
	# database 3: id ~> hits (when id is not found)
	# database 4: id ~> [{referer\|user_agent}] (when id is not found)
	# database 5: key "count" storing the number of shortened urls; the id is generated by (this number + 1) converted to base 62

	class ActionDispatch::Routing::Mapper
	def draw(routes_name)
	instance_eval(File.read(Rails.root.join("config/routes/#{routes_name}.rb")))
	end
	end

	BCX::Application.routes.draw do
	draw :api
	draw :account
	draw :session

	# if running bash
	if [ -n "$BASH_VERSION" ]; then
	# include .bashrc if it exists
	if [ -f "$HOME/.bashrc" ]; then
	. "$HOME/.bashrc"
	fi
	fi

	# Convert any YouTube video into an audio file you can listen to on the go, using:
	# http://rg3.github.com/youtube-dl/

	{ ~ } > brew install ffmpeg

	{ ~ } > wget https://raw.github.com/rg3/youtube-dl/2012.02.27/youtube-dl
	{ ~ } > chmod u+x youtube-dl

	# Pick which video format you want to download.. (use any YT video link)
	{ ~ } > ./youtube-dl -s -F http://www.youtube.com/watch?v=vT1KmTQ-1Os