GCP Cloud-Function (PY3.7) to retrieve current Google Chrome version from official repo data

google-chrome-ver.py

import flask
import gzip
import json
import requests
import sys
import xml.etree.ElementTree as ET

REPO_URL = "https://dl.google.com/linux/chrome/rpm/stable/x86_64/repodata/other.xml.gz"


def fetch_repo():
    return ET.fromstring(gzip.decompress(requests.get(REPO_URL).content))


def compile_versions(tree):
    out = {}

    for package in tree.findall('./{http://linux.duke.edu/metadata/other}package'):
        if package.get('name', None) == None:
            continue

        v = package.find('./{http://linux.duke.edu/metadata/other}version')
        if v.get('ver', None) == None:
            continue

        out[package.get('name')] = v.get('ver')

    return out


def cloud_function_serve(request):
 obj = compile_versions(fetch_repo())

  spath = request.path.strip('/')
   if spath in obj:
        resp = flask.Response(obj[spath])
        resp.headers['Content-Type'] = 'text/plain'
        return resp

    resp = flask.Response(json.dumps(obj))
    resp.headers['Content-Type'] = 'application/json'
    return resp


def main(args):
    obj = compile_versions(fetch_repo())

    if len(args) == 1 and args[0] in obj:
        print(obj[args[0]])
        return

    print(obj)


if __name__ == "__main__":
    main(sys.argv[1:])