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"""Implementation of the ipaddres-based network types adaptation """ # psycopg/_ipaddress.py - Ipaddres-based network types adaptation # # Copyright (C) 2016-2019 Daniele Varrazzo <daniele.varrazzo@gmail.com> # Copyright (C) 2020-2021 The Psycopg Team # # psycopg2 is free software: you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published # by the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # In addition, as a special exception, the copyright holders give # permission to link this program with the OpenSSL library (or with # modified versions of OpenSSL that use the same license as OpenSSL), # and distribute linked combinations including the two. # # You must obey the GNU Lesser General Public License in all respects for # all of the code used other than OpenSSL. # # psycopg2 is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public # License for more details. from psycopg2.extensions import ( new_type, new_array_type, register_type, register_adapter, QuotedString) # The module is imported on register_ipaddress ipaddress = None # The typecasters are created only once _casters = None def register_ipaddress(conn_or_curs=None): """ Register conversion support between `ipaddress` objects and `network types`__. :param conn_or_curs: the scope where to register the type casters. If `!None` register them globally. After the function is called, PostgreSQL :sql:`inet` values will be converted into `~ipaddress.IPv4Interface` or `~ipaddress.IPv6Interface` objects, :sql:`cidr` values into into `~ipaddress.IPv4Network` or `~ipaddress.IPv6Network`. .. __: https://www.postgresql.org/docs/current/static/datatype-net-types.html """ global ipaddress import ipaddress global _casters if _casters is None: _casters = _make_casters() for c in _casters: register_type(c, conn_or_curs) for t in [ipaddress.IPv4Interface, ipaddress.IPv6Interface, ipaddress.IPv4Network, ipaddress.IPv6Network]: register_adapter(t, adapt_ipaddress) def _make_casters(): inet = new_type((869,), 'INET', cast_interface) ainet = new_array_type((1041,), 'INET[]', inet) cidr = new_type((650,), 'CIDR', cast_network) acidr = new_array_type((651,), 'CIDR[]', cidr) return [inet, ainet, cidr, acidr] def cast_interface(s, cur=None): if s is None: return None # Py2 version force the use of unicode. meh. return ipaddress.ip_interface(str(s)) def cast_network(s, cur=None): if s is None: return None return ipaddress.ip_network(str(s)) def adapt_ipaddress(obj): return QuotedString(str(obj))