inject_securetransport.py

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"""A helper module that injects SecureTransport, on import.
 
The import should be done as early as possible, to ensure all requests and
sessions (or whatever) are created after injecting SecureTransport.
 
Note that we only do the injection on macOS, when the linked OpenSSL is too
old to handle TLSv1.2.
"""
 
import sys
 
 
def inject_securetransport() -> None:
    # Only relevant on macOS
    if sys.platform != "darwin":
        return
 
    try:
        import ssl
    except ImportError:
        return
 
    # Checks for OpenSSL 1.0.1
    if ssl.OPENSSL_VERSION_NUMBER >= 0x1000100F:
        return
 
    try:
        from pip._vendor.urllib3.contrib import securetransport
    except (ImportError, OSError):
        return
 
    securetransport.inject_into_urllib3()
 
 
inject_securetransport()