koenbollen

#!/usr/bin/env python
#
# Proof of Concept: UDP Hole Punching
# Two client connect to a server and get redirected to each other.
#
# This is the client.
#
# Koen Bollen <meneer koenbollen nl>
# 2010 GPL
#

davidreynolds

#include <sys/epoll.h>
#include <fcntl.h>
#include <string.h>

#include "chicken.h"

#define MAX_EVENTS 24

extern void SCM_epoll_wait_cb(C_word vec);

domenic

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.

soarez

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

vongosling

LInux

Three system configuration parameters must be set to support a large number of open files and TCP connections with large bursts of messages. Changes can be made using the /etc/rc.d/rc.local or /etc/sysctl.conf script to preserve changes after reboot.

1. /proc/sys/fs/file-max: The maximum number of concurrently open files.

fs.file-max = 1000000

2. /proc/sys/net/ipv4/tcp_max_syn_backlog: Maximum number of remembered connection requests, which are still did not receive an acknowledgment from connecting client. The default value is 1024 for systems with more than 128Mb of memory, and 128 for low memory machines.

net.ipv4.tcp_max_syn_backlog = 3240000

3. /proc/sys/net/core/somaxconn: Limit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 128.

net.core.somaxconn = 3240000

joyrexus

A quick overview of the node.js streams interface with basic examples.

This is based on @brycebaril's presentation, Node.js Streams2 Demystified

Overview

Streams are a first-class construct in Node.js for handling data.

Think of them as as lazy evaluation applied to data.

connect_multi.py

#!/usr/bin/env python

import socket
import random
import itertools
import sys

HOSTS=["www.bbc.co.uk", "guardian.co.uk", "dailymail.co.uk", "reddit.com"]

request = '''

Integralist

• Dynamic Dispatch
• Dynamic Method
• Ghost Methods
• Dynamic Proxies
• Blank Slate
• Kernel Method
• Flattening the Scope (aka Nested Lexical Scopes)
• Context Probe
• Class Eval (not really a 'spell' more just a demonstration of its usage)
• Class Macros

JamesMGreene

Initialize

gitflow	git
git flow init	git init
	git commit --allow-empty -m "Initial commit"
	git checkout -b develop master

Connect to the remote repository

Stono

#!/bin/bash
# This script will help you setup Docker for TLS authentication.
# Run it passing in the arguement for the FQDN of your docker server
#
# For example:
#    ./create-docker-tls.sh myhost.docker.com
# 
# The script will also create a profile.d (if it exists) entry 
# which configures your docker client to use TLS
#