Peter Mescalchin magnetikonline

FLAC -> MP3 VBR with ffmpeg

Convert source FLAC files in a directory to MP3 VBR (around 220-260 kbps).

#!/bin/bash -e

FLAC_SRC_DIR="/path/to/flac/files"

Kodi media player - update video database file paths

The Kodi databases are all SQLite3 based.
For Linux, the video database will be located at: ~/.kodi/userdata/Database/MyVideosXX.db, where XX is the version number. You will most likely want the highest number available for edit.

Install SQLite CLI tools, open database

$ sudo apt-get install libsqlite3-dev sqlite3
$ sqlite3 MyVideosXX.db

Python AWS CloudTrail parser

Python parser class for CloudTrail event archives, previously dumped to an S3 bucket. Class provides an iterator which will:

Scan a given directory for archive files matching the required pattern.
Decompress each archive in memory.
Parse JSON payload and return each event in turn.

Parser contained in cloudtrailparser.py, with timezone.py used as a simple datetime.tzinfo concrete class implement to provide UTC timezone.

SSL certificate - compare certificate vs. private key

Or to put it another way...

Does this certificate I have actually work with this private key I have?

Where server.crt is your certificate and server.key is your private key:

$ certMod=$(openssl x509 -text -noout -modulus -in server.crt | grep "Modulus=") && \
	keyMod=$(openssl rsa -text -noout -modulus -in server.key | grep "Modulus=") && \
	[[ $certMod == $keyMod ]] &amp;&amp; echo "Equal"

JavaScript object inheritance techniques

Via `Object.create()`

function Shape(x,y) {

	this.x = x;
	this.y = y;
}

Node.js HTTP receiving request dump server

HTTP server which receives requests and dumps them to a flat file.

Usage

Start HTTP server:

$ nodejs ./httprequestdump.js

Python - comparing JSON data structures

A function compare_json_data(source_data_a,source_data_b), accepting structures populated with data loaded from json.load() and comparing for equality.

Example

$ ./compare.py 
Compare JSON result is: True

Compile ssh2 bindings extension for PHP7

The current PHP ssh2 extension via PECL won't compile under PHP7.

Using a more recent version via PHP's GitHub we can make this work.

$ sudo apt-get install autoconf libssh2-1-dev
$ curl -LO https://github.com/php/pecl-networking-ssh2/archive/master.zip
$ unzip master.zip
$ cd pecl-networking-ssh2-master

Python 2 json.dump() file-like object class for tab indenting of output file

Using json.dump() with Python 2, indent argument is limited to number of spaces only - no ability for tabs use.

Class JSONTabIndentFileWriter provides a file-like object which will rewrite json.dump() output indending from spaces to tabs.

	#!/usr/bin/env python

	from datetime import datetime
	import timezone


	def main():
	my_time = datetime(
	year = 2016,
	month = 1,