o .ji @sUdZddlmZddlZddlZddlZddlmZddlm Z dZ dZ de d <d d d d d d d d d d d d d Z d d d dZd ddZd!ddZd"ddZd#ddZdS)$z>Internal resolution helpers for :mod:`urllib3.contrib.anytls`.) annotationsN) ModuleType)TupleURLLIB3_FUTURE_SSL_BACKEND)rtlsutlssslzTuple[str, ...]_DEFAULT_ORDERrrr) rrustlszaws-lcaws_lcawslcr boringsslz boring-ssl boring_sslrstdlib stdlib_sslvalue str | Nonereturn list[str]cCslg}|r&|}|tvr|t|n|r&tjd|dtdddtD] }||vr3||q(|S)zBuild the ordered list of backends to attempt. The user-requested backend (if any) is tried first, then the remaining defaults in the default order, de-duplicated. zUnknown value z for environment variable zI; falling back to default backend resolution order (rtls -> utls -> ssl).) stacklevel)striplower _TOKEN_MAPappendwarningswarnENV_VARr )rordertokennamer![/home/thesage/.local/lib/python3.10/site-packages/urllib3_future/contrib/anytls/_backend.py _parse_pref(s"  r#r strModuleType | NonecCs8ztt|WStyYdStyYdSw)N) importlib import_module _IMPORT_NAME ImportError Exception)r r!r!r" _try_importCs  r+backend type | NonecCs|dvrz t|}t|ddWStyYdSwztd}t|dd}|dur.|WSWn ty8Ynwz ddlm}|WStyLYdSw)zBest-effort import of the Certificate type used for peer-cert chain extraction. rtls/utls expose it directly; for stdlib ssl, fall back to the private ``_ssl.Certificate`` (used by ``backend/hface.py``). )rr CertificateN_sslr)r.)r&r'getattrr)_cffi_ssl._stdssl.certificater.)r,modr/certr.r!r!r"_load_certificateNs,       r4?tuple[ModuleType | None, ModuleType | None, str, object | None]cCsztd}Wn tyd}Ynwttjt}d}d}|D]}t|}|dur1|}|}nq!|durs<