michalc’s gists

michalc / postman-hawk.js

Last active September 21, 2021 05:44

Postman pre-request script for Hawk authentication in custom header

	/*****************************************************************************/

	const hawkId = pm.variables.get('hawk_id');
	const hawkKey = pm.variables.get('hawk_key');
	const hawkHeader = pm.variables.get('hawk_header') \|\| 'authorization';

	/*****************************************************************************/

	const timestamp = parseInt(new Date().getTime() / 1000);
	const nonce = CryptoJS.enc.Base64.stringify(CryptoJS.lib.WordArray.random(6));

michalc / sqlite.py

Last active April 3, 2024 17:26

Use libsqlite3 directly from Python with ctypes: without using the built-in sqlite3 Python package, and without compiling anything

	# From https://stackoverflow.com/a/68876046/1319998, which is itself inspired by https://stackoverflow.com/a/68814418/1319998

	from contextlib import contextmanager
	from collections import namedtuple
	from ctypes import cdll, byref, string_at, c_char_p, c_int, c_double, c_int64, c_void_p
	from ctypes.util import find_library
	from sys import platform


	def query(db_file, sql, params=()):

michalc / spec.json

Last active July 4, 2021 20:15

World Bank + Vega-lite

	{
	"$schema": "https://vega.github.io/schema/vega-lite/v5.json",
	"width": 630,
	"height": 630,
	"data": {
	"values": [
	{
	"type": "Feature",
	"id": 0,
	"geometry": {

michalc / table_csv_view.py

Created March 7, 2019 09:19

Django + gevent + psycopg2 download whole PostgreSQL table as CSV

michalc / getaddrinfo_via_libc.py

Last active December 2, 2018 19:51

Own implementation of getaddrinfo by calling libc directly from Python + ctypes, supporting IPv4 and IPv6 (experimental)

michalc / path_lock_local_read_write_ancestor.py

Last active November 25, 2018 09:14

Path lock using a read/write/ancestor lock on each ancestor path

	import asyncio
	import contextlib
	import weakref

	from fifolock import FifoLock

	class ReadAncestor(asyncio.Future):
	@staticmethod
	def is_compatible(holds):
	return not holds[Write]

michalc / path_lock_local_read_write.py

Last active November 25, 2018 09:15

Path lock using a read/write lock on each ancestor path

	import asyncio
	import contextlib
	import weakref

	from fifolock import FifoLock

	class Read(asyncio.Future):
	@staticmethod
	def is_compatible(holds):
	return not holds[Write]

michalc / path_lock_global_read_write.py

Last active November 25, 2018 09:17

Path lock using a global read/write lock

	import asyncio
	import contextlib

	from fifolock import FifoLock

	class Read(asyncio.Future):
	@staticmethod
	def is_compatible(holds):
	return not holds[Write]

michalc / path_lock_global_exclusive.py

Last active November 22, 2018 19:23

Path lock using a global exclusive lock

	import asyncio
	import contextlib

	class PathLock():

	def __init__(self):
	self.lock = asyncio.Lock()

	@contextlib.asynccontextmanager
	async def __call__(self, read, write):

michalc / asyncio_read_write_lock.py

Last active January 3, 2022 09:46

Python asyncio read-write lock, using a generic first-in-first-out lock

Michal Charemza michalc