common.py 文件源码

def validate_cert_reqs(option, value):
    """Validate the cert reqs are valid. It must be None or one of the three
    values ``ssl.CERT_NONE``, ``ssl.CERT_OPTIONAL`` or ``ssl.CERT_REQUIRED``"""
    if value is None:
        return value
    if HAS_SSL:
        if value in (ssl.CERT_NONE, ssl.CERT_OPTIONAL, ssl.CERT_REQUIRED):
            return value
        raise ConfigurationError("The value of %s must be one of: "
                                 "`ssl.CERT_NONE`, `ssl.CERT_OPTIONAL` or "
                                 "`ssl.CERT_REQUIRED" % (option,))
    else:
        raise ConfigurationError("The value of %s is set but can't be "
                                 "validated. The ssl module is not available"
                                 % (option,))