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#!/usr/bin/env python3
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
"""Fetch and print the most common user agents.
This script fetches the most common user agents according to
https://github.com/Kikobeats/top-user-agents, and prints the most recent
Chrome user agent for Windows, macOS and Linux.
"""
import math
import sys
import textwrap
import requests
import qutebrowser.config.websettings
def version(ua):
"""Comparable version of a user agent."""
return tuple(int(v) for v in ua.upstream_browser_version.split('.')[:2])
def wrap(ini, sub, string):
return textwrap.wrap(string, width=80, initial_indent=ini, subsequent_indent=sub)
response = requests.get('https://raw.githubusercontent.com/Kikobeats/top-user-agents/master/index.json')
if response.status_code != 200:
print('Unable to fetch the user agent index', file=sys.stderr)
sys.exit(1)
ua_checks = {
'Win10': lambda ua: ua.os_info.startswith('Windows NT'),
'macOS': lambda ua: ua.os_info.startswith('Macintosh'),
'Linux': lambda ua: ua.os_info.startswith('X11'),
}
ua_strings = {}
ua_versions = {}
ua_names = {}
for ua_string in reversed(response.json()):
# reversed to prefer more common versions
# Filter out browsers that are not Chrome-based
parts = ua_string.split()
if not any(part.startswith("Chrome/") for part in parts):
continue
if any(part.startswith("OPR/") or part.startswith("Edg/") for part in parts):
continue
if 'Chrome/99.0.7113.93' in parts:
# Fake or false-positive entry
continue
user_agent = qutebrowser.config.websettings.UserAgent.parse(ua_string)
# check which os_string conditions are met and select the most recent version
for key, check in ua_checks.items():
if check(user_agent):
v = version(user_agent)
if v >= ua_versions.get(key, (-math.inf,)):
ua_versions[key] = v
ua_strings[key] = ua_string
ua_names[key] = f'Chrome {v[0]} {key}'
for key, ua_string in ua_strings.items():
quoted_ua_string = f'"{ua_string}"'
for line in wrap(" - - ", " ", quoted_ua_string):
print(line)
for line in wrap(" - ", " ", ua_names[key]):
print(line)
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