如何使用 Flask 获取用户代理? [英] How do I get the user agent with Flask?

问题描述

我正在尝试使用 Flask 访问用户代理，但我要么找不到它的文档，要么它没有告诉我.

I'm trying to get access to the user agent with Flask, but I either can't find the documentation on it, or it doesn't tell me.

推荐答案

from flask import request
request.headers.get('User-Agent')

您也可以使用请求.user_agent 对象包含以下基于 useragent 字符串创建的属性:

You can also use the request.user_agent object which contains the following attributes which are created based on the useragent string:

• 平台(windows、linux、macos 等)
• 浏览器(chrome、firefox、msie 等)
• 版本
• 语言
• string (== request.headers.get('User-Agent'))

注意:从werkzeug 2.0开始，request.user_agent的解析数据已被弃用；如果您想继续获取详细信息，则需要使用自定义 UserAgent 实现并将其设置为自定义 Request 子类上的 user_agent_class，该子类已设置作为 Flask 实例(或子类)上的 request_class.

Note: As of werkzeug 2.0, the parsed data of request.user_agent has been deprecated; if you want to keep getting details you need to use a custom UserAgent implementation and set it as user_agent_class on a custom Request subclass, which is set as request_class on the Flask instance (or a subclass).

这是一个使用 ua-parser:

Here's an example implementation that uses ua-parser:

from ua_parser import user_agent_parser
from werkzeug.user_agent import UserAgent
from werkzeug.utils import cached_property


class ParsedUserAgent(UserAgent):
    @cached_property
    def _details(self):
        return user_agent_parser.Parse(self.string)

    @property
    def platform(self):
        return self._details['os']['family']

    @property
    def browser(self):
        return self._details['user_agent']['family']

    @property
    def version(self):
        return '.'.join(
            part
            for key in ('major', 'minor', 'patch')
            if (part := self._details['user_agent'][key]) is not None
        )

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