wvengen

Finding a Ruby memory leak using a time analysis

When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.

There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the

mikhailov

# Nginx+Unicorn best-practices congifuration guide. Heartbleed fixed.
# We use latest stable nginx with fresh **openssl**, **zlib** and **pcre** dependencies.
# Some extra handy modules to use: --with-http_stub_status_module --with-http_gzip_static_module
#
# Deployment structure
#
# SERVER:
#  /etc/init.d/nginx                             (1. nginx)
#  /home/app/public_html/app_production/current  (Capistrano directory)
#

embs

Authentication from Scratch with Rails 3.2.5

Rails 3.1 gives us a really easy way to authenticate users in our app: http_basic_authenticate_with. Using it, all we need to do is create a model for the user (certainly, User model :P) with an attribute called password_digest and some views feature for login and register users. After all, let's relax and let Rails do the hard work.

What we'll need

Gemfile

gem 'bcrypt-ruby', '~> 3.0.0'

Model

First at all, an User model which we can generate by following: rails g model user email:string password_digest:string and then add the following methodo call to generated class: has_secure_password

ericchen

require 'rubygems'
require 'eventmachine'
require "socket"

module GwServer
  
  # @server_socket = TCPSocket.open('127.0.0.1', 3000)
  
  class GwTcpClient < EventMachine::Connection
    

zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

johnthethird

# Config for Nginx to act as a front-end for Riak
# The main goal is to proxy all GETs directly to Riak, and disallow anything else (POST, PUT, etc)
# Also, disallow use of the map/reduce query links (i.e. /riak/bucket/key/_,_,_)

# Config is in /etc/nginx/sites-available/default or somewhere like that

# Set up load-balancing to send requests to all nodes in the Riak cluster
# Replace these IPs/ports with the locations of your Riak nodes
upstream riak_hosts {
  server  127.0.0.1:8098;