tracking exe version online (with ETag)

peinfo.py

import pefile
import pprint

def get_version_info(file):
	pe =  pefile.PE(file)

	string_version_info = {}

	for fileinfo in pe.FileInfo[0]:
		if fileinfo.Key.decode() == 'StringFileInfo':
			for st in fileinfo.StringTable:
				for entry in st.entries.items():
					string_version_info[entry[0].decode()] = entry[1].decode()

	return string_version_info

updateVersion.py

import requests
from peinfo import get_version_info
from time import strftime, sleep

exe_link = ''
# Example: https://telerik-fiddler.s3.amazonaws.com/fiddler/FiddlerSetup.exe

r = requests.get(exe_link)
with open('TheFile.exe','wb') as f:
	f.write(r.content)

vi = get_version_info('TheFile.exe')
pv = vi['ProductVersion']
print(f'Starting with version {pv}')

ETag = r.headers.get('ETag')

r = requests.get(exe_link, headers = {'If-None-Match':ETag})
while r.status_code == 304:
	r = requests.get(exe_link, headers = {'If-None-Match':ETag})
	print(strftime(f'%T - {r.status_code}'))
	sleep(60)
	

if r.status_code == 200:
	with open('TheFile.exe','wb') as f:
		f.write(r.content)
	
	vi = get_version_info('TheFile.exe')
	
	pv = vi['ProductVersion']
	
	print(f'Update to version {pv} available / published')

It's not so hard to modify this to work if the server with the file does not return an ETag in the response headers, but in that case it's even more important to increase the sleeping time to avoid loading the file from the server to often,
if I personally ever find the need to create a script without the ETag header, I will also upload it here and then add a link here