Lance Pollard lancejpollard

HLS streaming from node

Provided that you already have a file or stream segmenter generating your .m3u8 playlist and .ts segment files (such as the ffmpeg 'hls' muxer), this little node server will serve up those files to an HLS compatible client (e.g. Safari). If you're using node for your streaming app already, this obviates the need to serve the HLS stream from a separate web server.

loosely based on https://gist.github.com/bnerd/2011232

// loosely based on https://gist.github.com/bnerd/2011232
// requires node.js >= v0.10.0
// assumes that HLS segmenter filename base is 'out'
// and that the HLS playlist and .ts files are in the current directory

2015-01-29 Unofficial Relay FAQ

Compilation of questions and answers about Relay from React.js Conf.

Disclaimer: I work on Relay at Facebook. Relay is a complex system on which we're iterating aggressively. I'll do my best here to provide accurate, useful answers, but the details are subject to change. I may also be wrong. Feedback and additional questions are welcome.

What is Relay?

Relay is a new framework from Facebook that provides data-fetching functionality for React applications. It was announced at React.js Conf (January 2015).

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.

Introduction to the Unix Curses Library

Norman Matloff

Department of Computer Science

University of California at Davis

c 1997-2011, N. Matloff April 8, 2011

Understanding the Memory Layout of Linux Executables

Required tools for playing around with memory:

hexdump
objdump
readelf
xxd
gcore

	// Viterbi algorithm for finding hidden relationships
	function Viterbi(data) {
	var V = [{}];
	var path = {};

	// Initialize base cases (t == 0)
	for(var i=0;i<data.states.length;i++) {
	var state = data.states[i];
	V[0][state] = data.start_probability[state] * data.emission_probability[state][data.observations[0]];
	path[state] = [state];

	var test =
	[
	['label0', 100, 200, 300, 400, 500],
	['label0', 200, 100, 400, 300, 500],
	['label1', 100, 100, 100, 100, 100],
	['label1', 100, 100, 100, 100, 100],
	['label2', 0, 0, 0, 0, 0],
	['label2', 0, 1, 1, 0, 0],
	];

	; 1 2 3 4 5 6 7
	;01234567890123456789012345678901234567890123456789012345678901234567890
	;=======================================================================
	;+---------------------------------------------------------------------+
	;\| \|
	;\| Example using brk() system call for dynamic memory allocations. \|
	;\| \|
	;\| DON'T CONFUSE that brk() used in C Function is different with brk() \|
	;\| systemcall (systemcall 45 for x86 ASM). \|
	;\| \|

	'use strict';

	const crypto = require('crypto');

	const ENCRYPTION_KEY = process.env.ENCRYPTION_KEY; // Must be 256 bytes (32 characters)
	const IV_LENGTH = 16; // For AES, this is always 16

	function encrypt(text) {
	let iv = crypto.randomBytes(IV_LENGTH);
	let cipher = crypto.createCipheriv('aes-256-cbc', new Buffer(ENCRYPTION_KEY), iv);

	#include <sys/socket.h>
	#include <sys/un.h>
	#include <sys/event.h>
	#include <netdb.h>
	#include <assert.h>
	#include <unistd.h>
	#include <fcntl.h>
	#include <stdio.h>
	#include <errno.h>