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57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
from .ssl_ import create_urllib3_context, resolve_cert_reqs, resolve_ssl_version
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def connection_requires_http_tunnel(
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proxy_url=None, proxy_config=None, destination_scheme=None
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):
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"""
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Returns True if the connection requires an HTTP CONNECT through the proxy.
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:param URL proxy_url:
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URL of the proxy.
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:param ProxyConfig proxy_config:
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Proxy configuration from poolmanager.py
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:param str destination_scheme:
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The scheme of the destination. (i.e https, http, etc)
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"""
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# If we're not using a proxy, no way to use a tunnel.
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if proxy_url is None:
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return False
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# HTTP destinations never require tunneling, we always forward.
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if destination_scheme == "http":
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return False
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# Support for forwarding with HTTPS proxies and HTTPS destinations.
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if (
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proxy_url.scheme == "https"
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and proxy_config
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and proxy_config.use_forwarding_for_https
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):
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return False
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# Otherwise always use a tunnel.
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return True
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def create_proxy_ssl_context(
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ssl_version, cert_reqs, ca_certs=None, ca_cert_dir=None, ca_cert_data=None
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):
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"""
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Generates a default proxy ssl context if one hasn't been provided by the
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user.
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"""
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ssl_context = create_urllib3_context(
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ssl_version=resolve_ssl_version(ssl_version),
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cert_reqs=resolve_cert_reqs(cert_reqs),
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)
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if (
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not ca_certs
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and not ca_cert_dir
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and not ca_cert_data
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and hasattr(ssl_context, "load_default_certs")
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):
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ssl_context.load_default_certs()
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return ssl_context
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