/usr/lib/python2.7/dist-packages/nevow/useragent.py is in python-nevow 0.14.2-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | # -*- test-case-name: nevow.test.test_useragent -*-
"""
Parsers for browser User-Agent strings.
http://en.wikipedia.org/wiki/User_agent
http://www.user-agents.org/
"""
# Internet Explorer 1.0
# Microsoft Internet Explorer/Version (Platform)
# Internet Explorer, and browsers cloaking as Internet Explorer
# Mozilla/MozVer (compatible; MSIE IEVer[; Provider]; Platform[; Extension]*) [Addition]
# MozVer
# Netscape < 6.0
# Mozilla/Version[Gold] [[Language]][Provider] (Platform; Security[; SubPlatform][StandAlone])
# Mozilla
# Mozilla/MozVer (Platform; Security; SubPlatform; Language; rv:Revision[; Extension]*) Gecko/GeckVer [Product/ProdVer]
# Opera
# Opera/Version (Platform; U) [Language]
class browsers(object):
"""
Namespace class for Browser identifiers.
"""
GECKO = u'gecko'
INTERNET_EXPLORER = u'internet explorer'
WEBKIT = u'webkit'
OPERA = u'opera'
class UserAgent(object):
"""
Structured representation of a version identifier of a web browser.
This presents only minimal structured information about the agent
currently. It could be expanded to include much more information, such a
security properties, platform, and native language.
@type browser: C{unicode}
@ivar browser: The broad category of the browser. Can only take on values
from L{browsers}.
@type version: C{str}
@ivar version: The version claimed by the browser.
"""
def __init__(self, browser, version):
"""
Initialize a new UserAgent.
The positions of the arguments to this initializer are not stable.
Only pass arguments by keyword.
"""
self.browser = browser
self.version = version
def parse_GECKO(cls, agentString):
"""
Attempt to parse the given User-Agent string as a Gecko-based browser's
user-agent.
"""
identifier = 'Gecko/'
start = agentString.find(identifier)
if start != -1:
end = agentString.find(' ', start)
if end == -1:
end = None
version = agentString[start + len(identifier):end]
try:
version = int(version)
except ValueError:
pass
else:
return cls(browsers.GECKO, (version,))
parse_GECKO = classmethod(parse_GECKO)
def parse_WEBKIT(cls, agentString):
"""
Attempt to parse the given User-Agent string as a WebKit-based
browser's user-agent.
"""
identifier = 'WebKit/'
start = agentString.find(identifier)
if start != -1:
end = start + len(identifier)
while (
end < len(agentString) and
agentString[end].isdigit() or
agentString[end] == '.'):
end += 1
version = agentString[start + len(identifier):end]
try:
version = map(int, version.split('.'))
except ValueError:
pass
else:
return cls(browsers.WEBKIT, tuple(version))
parse_WEBKIT = classmethod(parse_WEBKIT)
def parse_OPERA(cls, agentString):
"""
Attempt to parse an Opera user-agent.
"""
prefix = 'Opera/'
if agentString.startswith(prefix):
version = agentString[len(prefix):].split(None, 1)[0]
try:
version = map(int, version.split('.'))
except ValueError:
pass
else:
return cls(browsers.OPERA, tuple(version))
parse_OPERA = classmethod(parse_OPERA)
def parse_MSIE(cls, agentString):
"""
Attempt to parse an Internet Explorer user-agent.
"""
oldPrefix = 'Mozilla/4.0 (compatible; MSIE '
newPrefix = 'Mozilla/5.0 (compatible; MSIE '
for prefix in oldPrefix, newPrefix:
if agentString.startswith(prefix):
end = agentString.find(';', len(prefix))
if end == -1:
end = None
version = agentString[len(prefix):end]
try:
version = map(int, version.split('.'))
except ValueError:
pass
else:
return cls(browsers.INTERNET_EXPLORER, tuple(version))
parse_MSIE = classmethod(parse_MSIE)
def fromHeaderValue(cls, agentString):
"""
Attempt to parse an arbitrary user-agent.
@rtype: C{cls} or C{NoneType}
@return: A user agent object, or C{None} if parsing fails.
"""
# Order matters here - MSIE parser will match a ton of browsers.
for parser in ['GECKO', 'WEBKIT', 'MSIE', 'OPERA']:
agent = getattr(cls, 'parse_' + parser)(agentString)
if agent is not None:
return agent
return None
fromHeaderValue = classmethod(fromHeaderValue)
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