Repository: psf/requests
File: src/requests/adapters.py (Python)

Code before:
    scheme = parsed_request_url.scheme.lower()
    port = parsed_request_url.port
    poolmanager_kwargs = getattr(poolmanager, "connection_pool_kw", {})
    has_poolmanager_ssl_context = poolmanager_kwargs.get("ssl_context")

    cert_reqs = "CERT_REQUIRED"
    if verify is False:
        cert_reqs = "CERT_NONE"
    elif verify is True and not has_poolmanager_ssl_context:
        pool_kwargs["ssl_context"] = _preloaded_ssl_context
    elif isinstance(verify, str):
        if not os.path.isdir(verify):
            pool_kwargs["ca_certs"] = verify
        else:
            pool_kwargs["ca_cert_dir"] = verify
    pool_kwargs["cert_reqs"] = cert_reqs
    if client_cert is not None:
        if isinstance(client_cert, tuple) and len(client_cert) == 2:
            pool_kwargs["cert_file"] = client_cert[0]
            pool_kwargs["key_file"] = client_cert[1]
        else:
            # According to our docs, we allow users to specify just the client
            # cert path
            pool_kwargs["cert_file"] = client_cert
    host_params = {
        "scheme": scheme,
        "host": parsed_request_url.hostname,
        "port": port,
    }
    return host_params, pool_kwargs


class BaseAdapter:
    """The Base Transport Adapter"""

    def __init__(self):
        super().__init__()

    def send(
        self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
    ):
        """Sends PreparedRequest object. Returns Response object.

        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
        :param stream: (optional) Whether to stream the request content.
        :param timeout: (optional) How long to wait for the server to send
            data before giving up, as a float, or a :ref:`(connect timeout,
            read timeout) <timeouts>` tuple.
        :type timeout: float or tuple
        :param verify: (optional) Either a boolean, in which case it controls whether we verify
            the server's TLS certificate, or a string, in which case it must be a path

Review comment (performance):
Looking at this again with something of a performance mindset, do we want to cache somehow lookups to `isdir`? I'm not sure this hurts us at all, but just thinking about things that could slow us down in certain cases now. (Not for this pull request, just putting it out there)

Code after:
    request: "PreparedRequest",
    verify: "bool | str | None",
    client_cert: "typing.Tuple[str, str] | str | None",
    poolmanager: "PoolManager",
) -> "(typing.Dict[str, typing.Any], typing.Dict[str, typing.Any])":
    host_params = {}
    pool_kwargs = {}
    parsed_request_url = urlparse(request.url)
    scheme = parsed_request_url.scheme.lower()
    port = parsed_request_url.port

    # Determine if we have and should use our default SSLContext
    # to optimize performance on standard requests.
    poolmanager_kwargs = getattr(poolmanager, "connection_pool_kw", {})
    has_poolmanager_ssl_context = poolmanager_kwargs.get("ssl_context")
    should_use_default_ssl_context = (
        _preloaded_ssl_context is not None and not has_poolmanager_ssl_context
    )

    cert_reqs = "CERT_REQUIRED"
    if verify is False:
        cert_reqs = "CERT_NONE"
    elif verify is True and should_use_default_ssl_context:
        pool_kwargs["ssl_context"] = _preloaded_ssl_context
    elif isinstance(verify, str):
        if not os.path.isdir(verify):
            pool_kwargs["ca_certs"] = verify
        else:
            pool_kwargs["ca_cert_dir"] = verify
    pool_kwargs["cert_reqs"] = cert_reqs
    if client_cert is not None:
        if isinstance(client_cert, tuple) and len(client_cert) == 2:
            pool_kwargs["cert_file"] = client_cert[0]
            pool_kwargs["key_file"] = client_cert[1]
        else:
            # According to our docs, we allow users to specify just the client
            # cert path
            pool_kwargs["cert_file"] = client_cert
    host_params = {
        "scheme": scheme,
        "host": parsed_request_url.hostname,
        "port": port,
    }
    return host_params, pool_kwargs


class BaseAdapter:
    """The Base Transport Adapter"""

    def __init__(self):
        super().__init__()