A way to fallback to local services for Snips when your internet goes down

offlineFallback.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import socket
import subprocess
import time

RUNNING = False
ONLINE 	= True


def checkOnlineState():
	global ONLINE

	try:
		req = requests.get('http://clients3.google.com/generate_204')
		if req.status_code != 204:
			raise Exception

		if not ONLINE:
			subprocess.call(['/home/pi/offlineFallback/shell/switchOnlineState.sh', "1"])
			print('Internet is back, switching back to Amazon Polly voice and Google ASR')

		return True
	except OSError:
		pass

	if ONLINE:
		subprocess.call(['/home/pi/offlineFallback/shell/switchOnlineState.sh', "0"])
		print('No more internet connection, falling back to PicoTTS and Snips ASR')

	return False




def main():
	global RUNNING, ONLINE
	subprocess.call(['/home/pi/offlineFallback/shell/switchOnlineState.sh', "1"])
	try:
		while RUNNING:
			ONLINE = checkOnlineState()
			time.sleep(60)
	except KeyboardInterrupt:
		pass

	exit(0)


if __name__ == '__main__':
	RUNNING = True
	main()

switchOnlineState.sh

#!/usr/bin/env bash

state="$1"

if [[ "$1" -eq "1" ]]; then
    sudo sed -i -e 's/provider = "picotts"/provider = "customtts"/' /etc/snips.toml
    sudo systemctl stop snips-asr
    sudo systemctl start snips-asr-google
else
    sudo sed -i -e 's/provider = "customtts"/provider = "picotts"/' /etc/snips.toml
    sudo systemctl stop snips-asr-google
    sudo systemctl start snips-asr
fi

sudo systemctl restart snips-*