| # -*- coding: utf-8 -*- |
| |
| """ |
| certifi.py |
| ~~~~~~~~~~ |
| |
| This module returns the installation location of cacert.pem or its contents. |
| """ |
| import os |
| |
| try: |
| from importlib.resources import path as get_path, read_text |
| |
| _CACERT_CTX = None |
| _CACERT_PATH = None |
| |
| def where(): |
| # 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("pip._vendor.certifi", "cacert.pem") |
| _CACERT_PATH = str(_CACERT_CTX.__enter__()) |
| |
| return _CACERT_PATH |
| |
| |
| except ImportError: |
| # 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(_module, _path, encoding="ascii"): |
| with open(where(), "r", 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(): |
| f = os.path.dirname(__file__) |
| |
| return os.path.join(f, "cacert.pem") |
| |
| |
| def contents(): |
| return read_text("certifi", "cacert.pem", encoding="ascii") |