vsajip

/* Generated by: JavaCC 21 Parser Generator. JSONParser.java */
package org.parsers.json;

import org.parsers.json.ast.*;
import java.util.*;
import java.util.concurrent.CancellationException;
import java.util.logging.*;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;

vsajip

/* Generated by: JavaCC 21 Parser Generator. Do not edit. JSONConstants.java */
package org.parsers.json;

/**
 * Token literal values and constants.
 */
public interface JSONConstants {
    public enum TokenType {
        EOF, WHITESPACE, COLON, COMMA, OPEN_BRACKET, CLOSE_BRACKET, OPEN_BRACE, CLOSE_BRACE, TRUE, FALSE, NULL, STRING_LITERAL, NUMBER, INVALID
    }

vsajip

mkdir heroku
cd heroku/
virtualenv --no-site-packages env
source env/bin/activate
pip install bottle gevent
pip freeze > requirements.txt

cat >app.py <<EOF
try:
    import gevent.monkey

vsajip

from concurrent.futures import ThreadPoolExecutor, as_completed
import json
import urllib.request

with open('webapp.json', encoding='utf-8') as f:
    config = json.loads(f.read())

URLS = [
    'http://localhost:%d/?ident=%d' % (config['port'], ident)
    for ident in range(1, 1001)

vsajip

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (C) 2021 Red Dove Consultants Limited. BSD-3-Clause licensed.
#
from ctypes import *
from ctypes.wintypes import BYTE,WORD,DWORD,LPWSTR,LPCWSTR,HANDLE,LPVOID,BOOL
import os
import sys

vsajip

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (C) 2021 Red Dove Consultants Limited
#
# Redistribution and use in source and binary forms, with or without modification, are
# permitted provided that the following conditions are met:
#
#   1. Redistributions of source code must retain the above copyright notice, this list
#      of conditions and the following disclaimer.

vsajip

[#macro BuildCodeSequence expansion indent]
[#var is = ""?right_pad(indent)]
${is}# DBG > BuildCodeSequence ${indent}
  [#list expansion.units as subexp]
    [@BuildCode subexp indent /]
  [/#list]
${is}# DBG < BuildCodeSequence ${indent}
[/#macro]
[#macro BuildExpansionCode expansion indent]
[#var is=""?right_pad(indent)]

vsajip

# From https://stackoverflow.com/questions/29547218/
# remove-silence-at-the-beginning-and-at-the-end-of-wave-files-with-pydub
from pydub import AudioSegment


def detect_leading_silence(sound, silence_threshold=-50.0, chunk_size=10):
    '''
    sound is a pydub.AudioSegment
    silence_threshold in dB
    chunk_size in ms

vsajip

#!/usr/local/bin/python
"""Replacement for htpasswd"""
# Original author: Eli Carter

import os
import sys
import random
from optparse import OptionParser

# We need a crypt module, but Windows doesn't have one by default.  Try to find

vsajip

Raspberry Pi on Internet via reverse SSH tunnel

HackerNews discussed this with many alternative solutions: https://news.ycombinator.com/item?id=24893615

I already have my own domain name: mydomain.com. I wanted to be able to run some webapps on my Raspberry Pi 4B running perpetually at home in headless mode (just needs 5W power and wireless internet). I wanted to be able to access these apps from public Internet. Dynamic DNS wasn't an option because my ISP blocks all incoming traffic. ngrok would work but the free plan is too restrictive.

I bought a cheap 2GB RAM, 20GB disk VM + a 25GB volume on Hetzner for about 4 EUR/month. Hetzner gave me a static IP for it. I haven't purchased a floating IP yet.