| import typing as t | |
| class UserAgent: | |
| """Represents a parsed user agent header value. | |
| The default implementation does no parsing, only the :attr:`string` | |
| attribute is set. A subclass may parse the string to set the | |
| common attributes or expose other information. Set | |
| :attr:`werkzeug.wrappers.Request.user_agent_class` to use a | |
| subclass. | |
| :param string: The header value to parse. | |
| .. versionadded:: 2.0 | |
| This replaces the previous ``useragents`` module, but does not | |
| provide a built-in parser. | |
| """ | |
| platform: t.Optional[str] = None | |
| """The OS name, if it could be parsed from the string.""" | |
| browser: t.Optional[str] = None | |
| """The browser name, if it could be parsed from the string.""" | |
| version: t.Optional[str] = None | |
| """The browser version, if it could be parsed from the string.""" | |
| language: t.Optional[str] = None | |
| """The browser language, if it could be parsed from the string.""" | |
| def __init__(self, string: str) -> None: | |
| self.string: str = string | |
| """The original header value.""" | |
| def __repr__(self) -> str: | |
| return f"<{type(self).__name__} {self.browser}/{self.version}>" | |
| def __str__(self) -> str: | |
| return self.string | |
| def __bool__(self) -> bool: | |
| return bool(self.browser) | |
| def to_header(self) -> str: | |
| """Convert to a header value.""" | |
| return self.string | |