scentoni’s gists

scentoni / orl

Created April 7, 2023 19:23

Abuse openssl as a curlstitute

	#!/bin/bash
	# Usage:
	# orl 'https://eu.httpbin.org/#/HTTP_Methods'

	orl () {
	url=$1
	rex="$[^:]$://$[^/]$$/.*$"
	uscheme=$(echo $url \|sed "s,$rex,\1,")
	uauthority=$(echo $url \|sed "s,$rex,\2,")
	upath=$(echo $url \|sed "s,$rex,\3,")

scentoni / hcat

Last active February 22, 2023 05:26

A drop-in replacement for some limited uses of curl, written using only Python3 standard libraries.

	#!/usr/bin/env python3
	# Makes an HTTP request to the specified URL and sends response to stdout.
	# A drop-in replacement for some limited uses of curl, like:
	# hcat $URL -H "Authorization: Bearer $TOKEN"

	import urllib.parse
	import urllib.request
	import sys
	import argparse

scentoni / dockerfile

Created October 27, 2021 17:28

generate a dockerfile from an image

	#!/bin/bash
	# https://stackoverflow.com/questions/19104847/how-to-generate-a-dockerfile-from-an-image

	case "$OSTYPE" in
	linux*)
	docker history --no-trunc --format "{{.CreatedBy}}" $1 \| # extract information from layers
	tac \| # reverse the file
	sed 's,^$\|3.*$\?/bin/$ba$\?sh -c,RUN,' \| # change /bin/(ba)?sh calls to RUN
	sed 's,^RUN #(nop) *,,' \| # remove RUN #(nop) calls for ENV,LABEL...
	sed 's, && , \\\n \&\& ,g' # pretty print multi command lines following Docker best practices

scentoni / hostify.pl

Last active April 7, 2022 19:28

hostify: try to translate everything that looks like IP addresses

	#!/usr/bin/perl
	# hostify: try to translate everything that looks like IP addresses
	# into hostnames. Leave them alone if DNS doesn't resolve them.

	# echo "Please tip your 127.0.0.1 well." \|hostify
	# Please tip your localhost well.

	use Socket;

	sub host { return gethostbyaddr(inet_aton($_[0]), AF_INET) // $_[0]}

scentoni / ibitize.py

Created October 14, 2021 17:38

ibitize: take an integer argument, return a string using ibi binary prefixes

	#!/usr/bin/python

	# ibitize: take an integer argument, return a string using ibi binary prefixes
	# echo '32*2^30'\|bc
	# 34359738368
	# echo 'l(34359738368)/l(2)' \|bc -l
	# 35.00000000000000000036
	# ibitize 34359738368
	# 32.0 Gi

scentoni / brewdesc.sh

Created May 5, 2021 17:31

pretty-print installed brew packages

brew info --json --installed |jq -r '.[] |{name: .name, desc: .desc} |join("\t")' |column -ts $'\t'

scentoni / decimalapproximation.py

Last active May 30, 2020 02:04

Exploring the Python decimal module and approximations of transcendental numbers

	#!/usr/bin/python2.7
	# How many digits can I remember? How good is that approximation?
	import math
	import decimal

	def compute_pi():
	"""Compute Pi to the current precision.

	>>> print(pi())
	3.141592653589793238462643383

scentoni / res.sh

Created November 28, 2017 18:00

reset terminal size

	#!/bin/bash
	# https://stackoverflow.com/questions/19104847/how-to-generate-a-dockerfile-from-an-image

	case "$OSTYPE" in
	linux*)
	docker history --no-trunc --format "{{.CreatedBy}}" $1 \| # extract information from layers
	tac \| # reverse the file
	sed 's,^\(\|3.*\)\?/bin/\(ba\)\?sh -c,RUN,' \| # change /bin/(ba)?sh calls to RUN
	sed 's,^RUN #(nop) *,,' \| # remove RUN #(nop) calls for ENV,LABEL...
	sed 's, && , \\\n \&\& ,g' # pretty print multi command lines following Docker best practices