157 lines
4.3 KiB
Python
157 lines
4.3 KiB
Python
import requests
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from ua_parser import user_agent_parser
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_SUPPORT_DATA = requests.get(
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"https://raw.githubusercontent.com/Fyrd/caniuse/master/data.json"
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).json()["data"]
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SUPPORT = "y"
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PARTIAL_SUPPORT = "a"
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UNSUPPORTED = "n"
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POLYFILL = "p"
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UNKNOWN = "u"
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PREFIX = "x"
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DISABLED = "d"
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def safe_int(string):
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try:
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return int(string)
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except (ValueError, TypeError):
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return 0
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class BrowserFamily(object):
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def __init__(self, data):
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self._data = data
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self._ranges = ranges = []
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self._versions = versions = {}
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max_version = ()
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max_support = UNKNOWN
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for version, support in data.items():
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if version == "all":
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self.max_support = support
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elif "-" in version:
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start, end = version.split("-")
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start = tuple(map(int, start.split(".")))
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end = tuple(map(int, end.split("."))) + (1e3000,)
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ranges.append((start, end, support))
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if end > max_version:
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max_version = end
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max_support = support
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else:
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try:
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version = tuple(map(int, version.split(".")))
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except ValueError:
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pass
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else:
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if version > max_version:
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max_version = version
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max_support = support
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versions[version] = support
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self.max_version = max_version
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self.max_support = max_support
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def check(self, major, minor, patch):
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int_major, int_minor, int_patch = map(safe_int, (major, minor, patch))
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version = (int_major, int_minor, int_patch)
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if version > self.max_version:
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return self.max_support
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for key in (
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(int_major, int_minor, int_patch),
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(int_major, int_minor),
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(int_major,),
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major,
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):
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try:
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return self._versions[key]
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except KeyError:
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pass
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for start, end, support in self._ranges:
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if start <= version < end:
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return support
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return UNKNOWN
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class Feat(object):
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def __init__(self, data):
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self._data = data
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self._family = {
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name: BrowserFamily(data) for name, data in data["stats"].items()
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}
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def __getitem__(self, item):
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return self._family[item]
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class Database(object):
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def __init__(self, data):
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self._data = data
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self._feats = {feat: Feat(data) for feat, data in data.items()}
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def __getitem__(self, item):
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return self._feats[item]
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database = Database(_SUPPORT_DATA)
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class CanIUse(object):
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def __init__(self, ua):
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self._agent = user_agent_parser.Parse(ua)
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os_family = self._agent["os"]["family"]
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browser_family = self._agent["user_agent"]["family"]
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family = None
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if os_family == "Android":
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if "Firefox" in browser_family:
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family = "and_ff"
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elif "Chrome" in browser_family:
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family = "and_chr"
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elif "Android" in browser_family:
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family = "android"
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else:
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if "Edge" in browser_family:
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family = "edge"
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elif "Firefox" in browser_family:
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family = "firefox"
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elif "Chrome" in browser_family:
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family = "chrome"
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elif "IE" in browser_family:
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family = "ie"
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elif "Opera" in browser_family:
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family = "opera"
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elif "Safari" in browser_family:
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family = "safari"
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self._family = family
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def _check_feat(self, feat):
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if not self._family:
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return UNKNOWN
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try:
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stats = feat[self._family]
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except KeyError:
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return UNKNOWN
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else:
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ua = self._agent["user_agent"]
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return stats.check(ua["major"], ua["minor"], ua["patch"])[0]
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def __getattr__(self, attr):
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try:
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feat = database[attr.replace("_", "-")]
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except KeyError:
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raise AttributeError(attr)
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else:
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result = self._check_feat(feat)
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setattr(self, attr, result)
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return result
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