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""" certifi.py ~~~~~~~~~~ This module returns the installation location of cacert.pem or its contents. """ import sys if sys.version_info >= (3, 11): from importlib.resources import as_file, files _CACERT_CTX = None _CACERT_PATH = None def where() -> str: # This is slightly terrible, but we want to delay extracting the file # in cases where we're inside of a zipimport situation until someone # actually calls where(), but we don't want to re-extract the file # on every call of where(), so we'll do it once then store it in a # global variable. global _CACERT_CTX global _CACERT_PATH if _CACERT_PATH is None: # This is slightly janky, the importlib.resources API wants you to # manage the cleanup of this file, so it doesn't actually return a # path, it returns a context manager that will give you the path # when you enter it and will do any cleanup when you leave it. In # the common case of not needing a temporary file, it will just # return the file system location and the __exit__() is a no-op. # # We also have to hold onto the actual context manager, because # it will do the cleanup whenever it gets garbage collected, so # we will also store that at the global level as well. _CACERT_CTX = as_file(files("certifi").joinpath("cacert.pem")) _CACERT_PATH = str(_CACERT_CTX.__enter__()) return _CACERT_PATH def contents() -> str: return files("certifi").joinpath("cacert.pem").read_text(encoding="ascii") elif sys.version_info >= (3, 7): from importlib.resources import path as get_path, read_text _CACERT_CTX = None _CACERT_PATH = None def where() -> str: # This is slightly terrible, but we want to delay extracting the # file in cases where we're inside of a zipimport situation until # someone actually calls where(), but we don't want to re-extract # the file on every call of where(), so we'll do it once then store # it in a global variable. global _CACERT_CTX global _CACERT_PATH if _CACERT_PATH is None: # This is slightly janky, the importlib.resources API wants you # to manage the cleanup of this file, so it doesn't actually # return a path, it returns a context manager that will give # you the path when you enter it and will do any cleanup when # you leave it. In the common case of not needing a temporary # file, it will just return the file system location and the # __exit__() is a no-op. # # We also have to hold onto the actual context manager, because # it will do the cleanup whenever it gets garbage collected, so # we will also store that at the global level as well. _CACERT_CTX = get_path("certifi", "cacert.pem") _CACERT_PATH = str(_CACERT_CTX.__enter__()) return _CACERT_PATH def contents() -> str: return read_text("certifi", "cacert.pem", encoding="ascii") else: import os import types from typing import Union Package = Union[types.ModuleType, str] Resource = Union[str, "os.PathLike"] # This fallback will work for Python versions prior to 3.7 that lack the # importlib.resources module but relies on the existing `where` function # so won't address issues with environments like PyOxidizer that don't set # __file__ on modules. def read_text( package: Package, resource: Resource, encoding: str = 'utf-8', errors: str = 'strict' ) -> str: with open(where(), encoding=encoding) as data: return data.read() # If we don't have importlib.resources, then we will just do the old logic # of assuming we're on the filesystem and munge the path directly. def where() -> str: f = os.path.dirname(__file__) return os.path.join(f, "cacert.pem") def contents() -> str: return read_text("certifi", "cacert.pem", encoding="ascii")