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216 lines
7.1 KiB
216 lines
7.1 KiB
3 years ago
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import re
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import typing as t
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import warnings
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from .user_agent import UserAgent as _BaseUserAgent
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if t.TYPE_CHECKING:
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from _typeshed.wsgi import WSGIEnvironment
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class _UserAgentParser:
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platform_rules: t.ClassVar[t.Iterable[t.Tuple[str, str]]] = (
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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\b|mac\b|os\s*x", "macos"),
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("win", "windows"),
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(r"android", "android"),
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("netbsd", "netbsd"),
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("openbsd", "openbsd"),
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("freebsd", "freebsd"),
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("dragonfly", "dragonflybsd"),
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("(sun|i86)os", "solaris"),
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(r"x11\b|lin(\b|ux)?", "linux"),
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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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browser_rules: t.ClassVar[t.Iterable[t.Tuple[str, str]]] = (
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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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(r"opera|opr", "opera"),
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("edge|edg", "edge"),
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("chrome|crios", "chrome"),
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("seamonkey", "seamonkey"),
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("firefox|firebird|phoenix|iceweasel", "firefox"),
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("galeon", "galeon"),
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("safari|version", "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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("Baiduspider", "baidu"),
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("bingbot", "bing"),
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("mozilla", "mozilla"),
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)
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_browser_version_re = r"(?:{pattern})[/\sa-z(]*(\d+[.\da-z]+)?"
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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) -> None:
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self.platforms = [(b, re.compile(a, re.I)) for a, b in self.platform_rules]
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self.browsers = [
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(b, re.compile(self._browser_version_re.format(pattern=a), re.I))
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for a, b in self.browser_rules
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]
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def __call__(
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self, user_agent: str
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) -> t.Tuple[t.Optional[str], t.Optional[str], t.Optional[str], t.Optional[str]]:
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platform: t.Optional[str]
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browser: t.Optional[str]
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version: t.Optional[str]
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language: t.Optional[str]
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for platform, regex in self.platforms: # noqa: B007
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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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# Except for Trident, all browser key words come after the last ')'
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last_closing_paren = 0
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if (
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not re.compile(r"trident/.+? rv:", re.I).search(user_agent)
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and ")" in user_agent
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and user_agent[-1] != ")"
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):
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last_closing_paren = user_agent.rindex(")")
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for browser, regex in self.browsers: # noqa: B007
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match = regex.search(user_agent[last_closing_paren:])
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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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# It wasn't public, but users might have imported it anyway, show a
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# warning if a user created an instance.
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class UserAgentParser(_UserAgentParser):
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"""A simple user agent parser. Used by the `UserAgent`.
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.. deprecated:: 2.0
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Will be removed in Werkzeug 2.1. Use a dedicated parser library
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instead.
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"""
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def __init__(self) -> None:
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warnings.warn(
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"'UserAgentParser' is deprecated and will be removed in"
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" Werkzeug 2.1. Use a dedicated parser library instead.",
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DeprecationWarning,
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stacklevel=2,
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)
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super().__init__()
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class _deprecated_property(property):
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def __init__(self, fget: t.Callable[["_UserAgent"], t.Any]) -> None:
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super().__init__(fget)
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self.message = (
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"The built-in user agent parser is deprecated and will be"
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f" removed in Werkzeug 2.1. The {fget.__name__!r} property"
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" will be 'None'. Subclass 'werkzeug.user_agent.UserAgent'"
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" and set 'Request.user_agent_class' to use a different"
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" parser."
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)
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def __get__(self, *args: t.Any, **kwargs: t.Any) -> t.Any:
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warnings.warn(self.message, DeprecationWarning, stacklevel=3)
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return super().__get__(*args, **kwargs)
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# This is what Request.user_agent returns for now, only show warnings on
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# attribute access, not creation.
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class _UserAgent(_BaseUserAgent):
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_parser = _UserAgentParser()
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def __init__(self, string: str) -> None:
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super().__init__(string)
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info = self._parser(string)
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self._platform, self._browser, self._version, self._language = info
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@_deprecated_property
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def platform(self) -> t.Optional[str]: # type: ignore
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return self._platform
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@_deprecated_property
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def browser(self) -> t.Optional[str]: # type: ignore
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return self._browser
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@_deprecated_property
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def version(self) -> t.Optional[str]: # type: ignore
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return self._version
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@_deprecated_property
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def language(self) -> t.Optional[str]: # type: ignore
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return self._language
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# This is what users might be importing, show warnings on create.
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class UserAgent(_UserAgent):
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"""Represents a parsed user agent header value.
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This uses a basic parser to try to extract some information from the
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header.
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:param environ_or_string: The header value to parse, or a WSGI
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environ containing the header.
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.. deprecated:: 2.0
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Will be removed in Werkzeug 2.1. Subclass
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:class:`werkzeug.user_agent.UserAgent` (note the new module
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name) to use a dedicated parser instead.
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.. versionchanged:: 2.0
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Passing a WSGI environ is deprecated and will be removed in 2.1.
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"""
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def __init__(self, environ_or_string: "t.Union[str, WSGIEnvironment]") -> None:
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if isinstance(environ_or_string, dict):
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warnings.warn(
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"Passing an environ to 'UserAgent' is deprecated and"
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" will be removed in Werkzeug 2.1. Pass the header"
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" value string instead.",
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DeprecationWarning,
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stacklevel=2,
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)
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string = environ_or_string.get("HTTP_USER_AGENT", "")
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else:
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string = environ_or_string
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warnings.warn(
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"The 'werkzeug.useragents' module is deprecated and will be"
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" removed in Werkzeug 2.1. The new base API is"
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" 'werkzeug.user_agent.UserAgent'.",
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DeprecationWarning,
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stacklevel=2,
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)
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super().__init__(string)
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