194 lines
5.3 KiB
Python
194 lines
5.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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werkzeug.useragents
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~~~~~~~~~~~~~~~~~~~
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This module provides a helper to inspect user agent strings. This module
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is far from complete but should work for most of the currently available
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browsers.
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:copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details.
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:license: BSD, see LICENSE for more details.
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"""
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import re
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class UserAgentParser(object):
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"""A simple user agent parser. Used by the `UserAgent`."""
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platforms = (
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('cros', 'chromeos'),
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('iphone|ios', 'iphone'),
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('ipad', 'ipad'),
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(r'darwin|mac|os\s*x', 'macos'),
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('win', 'windows'),
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(r'android', 'android'),
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(r'x11|lin(\b|ux)?', 'linux'),
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('(sun|i86)os', 'solaris'),
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(r'nintendo\s+wii', 'wii'),
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('irix', 'irix'),
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('hp-?ux', 'hpux'),
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('aix', 'aix'),
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('sco|unix_sv', 'sco'),
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('bsd', 'bsd'),
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('amiga', 'amiga'),
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('blackberry|playbook', 'blackberry'),
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('symbian','symbian')
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)
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browsers = (
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('googlebot', 'google'),
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('msnbot', 'msn'),
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('yahoo', 'yahoo'),
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('ask jeeves', 'ask'),
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(r'aol|america\s+online\s+browser', 'aol'),
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('opera', 'opera'),
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('chrome', 'chrome'),
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('firefox|firebird|phoenix|iceweasel', 'firefox'),
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('galeon', 'galeon'),
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('safari', 'safari'),
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('webkit', 'webkit'),
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('camino', 'camino'),
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('konqueror', 'konqueror'),
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('k-meleon', 'kmeleon'),
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('netscape', 'netscape'),
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(r'msie|microsoft\s+internet\s+explorer|trident/.+? rv:', 'msie'),
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('lynx', 'lynx'),
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('links', 'links'),
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('seamonkey|mozilla', 'seamonkey')
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)
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_browser_version_re = r'(?:%s)[/\sa-z(]*(\d+[.\da-z]+)?(?i)'
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_language_re = re.compile(
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r'(?:;\s*|\s+)(\b\w{2}\b(?:-\b\w{2}\b)?)\s*;|'
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r'(?:\(|\[|;)\s*(\b\w{2}\b(?:-\b\w{2}\b)?)\s*(?:\]|\)|;)'
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)
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def __init__(self):
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self.platforms = [(b, re.compile(a, re.I)) for a, b in self.platforms]
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self.browsers = [(b, re.compile(self._browser_version_re % a))
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for a, b in self.browsers]
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def __call__(self, user_agent):
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for platform, regex in self.platforms:
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match = regex.search(user_agent)
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if match is not None:
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break
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else:
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platform = None
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for browser, regex in self.browsers:
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match = regex.search(user_agent)
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if match is not None:
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version = match.group(1)
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break
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else:
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browser = version = None
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match = self._language_re.search(user_agent)
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if match is not None:
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language = match.group(1) or match.group(2)
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else:
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language = None
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return platform, browser, version, language
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class UserAgent(object):
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"""Represents a user agent. Pass it a WSGI environment or a user agent
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string and you can inspect some of the details from the user agent
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string via the attributes. The following attributes exist:
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.. attribute:: string
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the raw user agent string
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.. attribute:: platform
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the browser platform. The following platforms are currently
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recognized:
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- `aix`
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- `amiga`
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- `android`
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- `bsd`
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- `chromeos`
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- `hpux`
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- `iphone`
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- `ipad`
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- `irix`
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- `linux`
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- `macos`
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- `sco`
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- `solaris`
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- `wii`
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- `windows`
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.. attribute:: browser
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the name of the browser. The following browsers are currently
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recognized:
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- `aol` *
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- `ask` *
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- `camino`
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- `chrome`
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- `firefox`
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- `galeon`
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- `google` *
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- `kmeleon`
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- `konqueror`
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- `links`
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- `lynx`
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- `msie`
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- `msn`
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- `netscape`
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- `opera`
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- `safari`
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- `seamonkey`
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- `webkit`
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- `yahoo` *
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(Browsers maked with a star (``*``) are crawlers.)
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.. attribute:: version
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the version of the browser
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.. attribute:: language
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the language of the browser
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"""
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_parser = UserAgentParser()
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def __init__(self, environ_or_string):
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if isinstance(environ_or_string, dict):
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environ_or_string = environ_or_string.get('HTTP_USER_AGENT', '')
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self.string = environ_or_string
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self.platform, self.browser, self.version, self.language = \
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self._parser(environ_or_string)
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def to_header(self):
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return self.string
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def __str__(self):
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return self.string
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def __nonzero__(self):
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return bool(self.browser)
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__bool__ = __nonzero__
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def __repr__(self):
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return '<%s %r/%s>' % (
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self.__class__.__name__,
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self.browser,
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self.version
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)
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# conceptionally this belongs in this module but because we want to lazily
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# load the user agent module (which happens in wrappers.py) we have to import
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# it afterwards. The class itself has the module set to this module so
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# pickle, inspect and similar modules treat the object as if it was really
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# implemented here.
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from werkzeug.wrappers import UserAgentMixin
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