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from __future__ import annotations
import typing
from .url import Url
if typing.TYPE_CHECKING:
from ..connection import ProxyConfig
def connection_requires_http_tunnel(
proxy_url: Url | None = None,
proxy_config: ProxyConfig | None = None,
destination_scheme: str | None = None,
) -> bool:
"""
Returns True if the connection requires an HTTP CONNECT through the proxy.
:param URL proxy_url:
URL of the proxy.
:param ProxyConfig proxy_config:
Proxy configuration from poolmanager.py
:param str destination_scheme:
The scheme of the destination. (i.e https, http, etc)
"""
# If we're not using a proxy, no way to use a tunnel.
if proxy_url is None:
return False
# HTTP destinations never require tunneling, we always forward.
if destination_scheme == "http":
return False
# Support for forwarding with HTTPS proxies and HTTPS destinations.
if (
proxy_url.scheme == "https"
and proxy_config
and proxy_config.use_forwarding_for_https
):
return False
# Otherwise always use a tunnel.
return True
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