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|
# -*- coding: utf-8 -*-
"""
werkzeug.useragents
~~~~~~~~~~~~~~~~~~~
This module provides a helper to inspect user agent strings. This module
is far from complete but should work for most of the currently available
browsers.
:copyright: (c) 2011 by the Werkzeug Team, see AUTHORS for more details.
:license: BSD, see LICENSE for more details.
"""
import re
class UserAgentParser(object):
"""A simple user agent parser. Used by the `UserAgent`."""
platforms = (
('iphone|ios', 'iphone'),
(r'darwin|mac|os\s*x', 'macos'),
('win', 'windows'),
(r'android', 'android'),
(r'x11|lin(\b|ux)?', 'linux'),
('(sun|i86)os', 'solaris'),
(r'nintendo\s+wii', 'wii'),
('irix', 'irix'),
('hp-?ux', 'hpux'),
('aix', 'aix'),
('sco|unix_sv', 'sco'),
('bsd', 'bsd'),
('amiga', 'amiga')
)
browsers = (
('googlebot', 'google'),
('msnbot', 'msn'),
('yahoo', 'yahoo'),
('ask jeeves', 'ask'),
(r'aol|america\s+online\s+browser', 'aol'),
('opera', 'opera'),
('chrome', 'chrome'),
('firefox|firebird|phoenix|iceweasel', 'firefox'),
('galeon', 'galeon'),
('safari', 'safari'),
('webkit', 'webkit'),
('camino', 'camino'),
('konqueror', 'konqueror'),
('k-meleon', 'kmeleon'),
('netscape', 'netscape'),
(r'msie|microsoft\s+internet\s+explorer', 'msie'),
('lynx', 'lynx'),
('links', 'links'),
('seamonkey|mozilla', 'seamonkey')
)
_browser_version_re = r'(?:%s)[/\sa-z(]*(\d+[.\da-z]+)?(?i)'
_language_re = re.compile(
r'(?:;\s*|\s+)(\b\w{2}\b(?:-\b\w{2}\b)?)\s*;|'
r'(?:\(|\[|;)\s*(\b\w{2}\b(?:-\b\w{2}\b)?)\s*(?:\]|\)|;)'
)
def __init__(self):
self.platforms = [(b, re.compile(a, re.I)) for a, b in self.platforms]
self.browsers = [(b, re.compile(self._browser_version_re % a))
for a, b in self.browsers]
def __call__(self, user_agent):
for platform, regex in self.platforms:
match = regex.search(user_agent)
if match is not None:
break
else:
platform = None
for browser, regex in self.browsers:
match = regex.search(user_agent)
if match is not None:
version = match.group(1)
break
else:
browser = version = None
match = self._language_re.search(user_agent)
if match is not None:
language = match.group(1) or match.group(2)
else:
language = None
return platform, browser, version, language
class UserAgent(object):
"""Represents a user agent. Pass it a WSGI environment or a user agent
string and you can inspect some of the details from the user agent
string via the attributes. The following attributes exist:
.. attribute:: string
the raw user agent string
.. attribute:: platform
the browser platform. The following platforms are currently
recognized:
- `aix`
- `amiga`
- `android`
- `bsd`
- `hpux`
- `iphone`
- `irix`
- `linux`
- `macos`
- `sco`
- `solaris`
- `wii`
- `windows`
.. attribute:: browser
the name of the browser. The following browsers are currently
recognized:
- `aol` *
- `ask` *
- `camino`
- `chrome`
- `firefox`
- `galeon`
- `google` *
- `kmeleon`
- `konqueror`
- `links`
- `lynx`
- `msie`
- `msn`
- `netscape`
- `opera`
- `safari`
- `seamonkey`
- `webkit`
- `yahoo` *
(Browsers maked with a star (``*``) are crawlers.)
.. attribute:: version
the version of the browser
.. attribute:: language
the language of the browser
"""
_parser = UserAgentParser()
def __init__(self, environ_or_string):
if isinstance(environ_or_string, dict):
environ_or_string = environ_or_string.get('HTTP_USER_AGENT', '')
self.string = environ_or_string
self.platform, self.browser, self.version, self.language = \
self._parser(environ_or_string)
def to_header(self):
return self.string
def __str__(self):
return self.string
def __nonzero__(self):
return bool(self.browser)
def __repr__(self):
return '<%s %r/%s>' % (
self.__class__.__name__,
self.browser,
self.version
)
# conceptionally this belongs in this module but because we want to lazily
# load the user agent module (which happens in wrappers.py) we have to import
# it afterwards. The class itself has the module set to this module so
# pickle, inspect and similar modules treat the object as if it was really
# implemented here.
from werkzeug.wrappers import UserAgentMixin
|
