92 lines
2.9 KiB
Python
92 lines
2.9 KiB
Python
"""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 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)
|
|
from psycopg2.compat import text_type
|
|
|
|
# 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(text_type(s))
|
|
|
|
|
|
def cast_network(s, cur=None):
|
|
if s is None:
|
|
return None
|
|
return ipaddress.ip_network(text_type(s))
|
|
|
|
|
|
def adapt_ipaddress(obj):
|
|
return QuotedString(str(obj))
|