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lib/python3.6/site-packages/ipaclient/remote_plugins/_[ Not.Writable ]

File://lib/python3.6/site-packages/ipaclient/remote_plugins/__init__.py

#
# Copyright (C) 2016  FreeIPA Contributors see COPYING for license
#

from collections.abc import MutableMapping
import errno
import json
import locale
import logging
import os
import time

from . import compat
from . import schema
from ipaclient.plugins.rpcclient import rpcclient
from ipalib.constants import USER_CACHE_PATH
from ipapython.dnsutil import DNSName

logger = logging.getLogger(__name__)


class ServerInfo(MutableMapping):
    _DIR = os.path.join(USER_CACHE_PATH, 'ipa', 'servers')

    def __init__(self, api):
        hostname = DNSName(api.env.server).ToASCII()
        self._path = os.path.join(self._DIR, hostname)
        self._force_check = api.env.force_schema_check
        self._now = time.time()
        self._dict = {}

        # copy-paste from ipalib/rpc.py
        try:
            self._language = locale.setlocale(
                locale.LC_MESSAGES, ''
            ).split('.', maxsplit=1)[0].lower()
        except locale.Error:
            self._language = 'en_us'

        self._read()

    def _read(self):
        try:
            with open(self._path, 'r') as sc:
                self._dict = json.load(sc)
        except Exception as e:
            if (isinstance(e, EnvironmentError) and
                    e.errno == errno.ENOENT):  # pylint: disable=no-member
                # ignore non-existent file, this happens when the cache was
                # erased or the server is contacted for the first time
                pass
            else:
                # warn that the file is unreadable, probably corrupted
                logger.warning('Failed to read server info: %s', e)

    def _write(self):
        try:
            try:
                os.makedirs(self._DIR)
            except EnvironmentError as e:
                if e.errno != errno.EEXIST:
                    raise
            with open(self._path, 'w') as sc:
                json.dump(self._dict, sc)
        except EnvironmentError as e:
            logger.warning('Failed to write server info: %s', e)

    def __getitem__(self, key):
        return self._dict[key]

    def __setitem__(self, key, value):
        self._dict[key] = value

    def __delitem__(self, key):
        del self._dict[key]

    def __iter__(self):
        return iter(self._dict)

    def __len__(self):
        return len(self._dict)

    def update_validity(self, ttl):
        if not self.is_valid():
            self['expiration'] = self._now + ttl
            self['language'] = self._language
            self._write()

    def is_valid(self):
        if self._force_check:
            return False

        try:
            expiration = self._dict['expiration']
            language = self._dict['language']
        except KeyError:
            # if any of these is missing consider the entry expired
            return False

        if expiration < self._now:
            return False

        if language != self._language:
            # language changed since last check
            return False

        return True


def get_package(api):
    if api.env.in_tree:
        # server packages are not published on pypi.org
        # pylint: disable=useless-suppression
        # pylint: disable=import-error,ipa-forbidden-import
        from ipaserver import plugins
        # pylint: enable=import-error,ipa-forbidden-import
        # pylint: enable=useless-suppression
    else:
        try:
            plugins = api._remote_plugins
        except AttributeError:
            server_info = ServerInfo(api)

            client = rpcclient(api)
            client.finalize()

            try:
                plugins = schema.get_package(server_info, client)
            except schema.NotAvailable:
                plugins = compat.get_package(server_info, client)
            finally:
                if client.isconnected():
                    client.disconnect()

            object.__setattr__(api, '_remote_plugins', plugins)

    return plugins

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