Synnefo

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#coding=utf8

import logging

from django.conf import settings

from synnefo.lib import parse_base_url, join_urls

from synnefo.lib.services import fill_endpoints

from pithos.api.services import pithos_services as vanilla_pithos_services

from astakosclient import AstakosClient

from copy import deepcopy

logger = logging.getLogger(__name__)

# --------------------------------------------------------------------

# Process Pithos settings

# Top-level URL for Pithos. Must set.

BASE_URL = getattr(settings, 'PITHOS_BASE_URL',

                   "https://object-store.example.synnefo.org/pithos/")

# Service Token acquired by identity provider.

SERVICE_TOKEN = getattr(settings, 'PITHOS_SERVICE_TOKEN', '')

BASE_HOST, BASE_PATH = parse_base_url(BASE_URL)

pithos_services = deepcopy(vanilla_pithos_services)

fill_endpoints(pithos_services, BASE_URL)

PITHOS_PREFIX = pithos_services['pithos_object-store']['prefix']

PUBLIC_PREFIX = pithos_services['pithos_public']['prefix']

UI_PREFIX = pithos_services['pithos_ui']['prefix']

VIEW_PREFIX = join_urls(UI_PREFIX, 'view')

# --------------------------------------------------------------------

# Process Astakos settings

ASTAKOS_AUTH_URL = getattr(

    settings, 'ASTAKOS_AUTH_URL',

    'https://accounts.example.synnefo.org/astakos/identity/v2.0')

ASTAKOSCLIENT_POOLSIZE = \

    getattr(settings, 'PITHOS_ASTAKOSCLIENT_POOLSIZE', 200)

# --------------------------------------

# Define a LazyAstakosUrl

# This is used to define ASTAKOS_ACCOUNT_URL and

# ASTAKOS_UI_URL and should never be used as is.

class LazyAstakosUrl(object):

    def __init__(self, endpoints_name):

        self.endpoints_name = endpoints_name

    def __str__(self):

        if not hasattr(self, 'str'):

            try:

                astakos_client = \

                    AstakosClient(SERVICE_TOKEN, ASTAKOS_AUTH_URL)

                self.str = getattr(astakos_client, self.endpoints_name)

            except Exception as excpt:

                logger.exception(

                    "Could not retrieve endpoints from Astakos url %s: %s",

                    ASTAKOS_AUTH_URL, excpt)

                return ""

        return self.str

# --------------------------------------

# Define ASTAKOS_ACCOUNT_URL and ASTAKOS_UR_URL as LazyAstakosUrl

# These are used to define the proxy paths.

# These have to be resolved lazily (by the proxy function) so

# they should not be used as is.

ASTAKOS_ACCOUNT_URL = LazyAstakosUrl('account_url')

ASTAKOS_UI_URL = LazyAstakosUrl('ui_url')

# --------------------------------------

# Define Astakos prefixes

ASTAKOS_PROXY_PREFIX = getattr(settings, 'PITHOS_PROXY_PREFIX', '_astakos')

ASTAKOS_AUTH_PREFIX = join_urls('/', ASTAKOS_PROXY_PREFIX, 'identity')

ASTAKOS_ACCOUNT_PREFIX = join_urls('/', ASTAKOS_PROXY_PREFIX, 'account')

ASTAKOS_UI_PREFIX = join_urls('/', ASTAKOS_PROXY_PREFIX, 'ui')

# --------------------------------------

# Define Astakos proxy paths

ASTAKOS_AUTH_PROXY_PATH = join_urls(BASE_PATH, ASTAKOS_AUTH_PREFIX)

ASTAKOS_ACCOUNT_PROXY_PATH = join_urls(BASE_PATH, ASTAKOS_ACCOUNT_PREFIX)

ASTAKOS_UI_PROXY_PATH = join_urls(BASE_PATH, ASTAKOS_UI_PREFIX)

# Astakos login URL to redirect if the user information is missing

LOGIN_URL = join_urls(ASTAKOS_UI_PROXY_PATH, 'login')

# --------------------------------------------------------------------

# Backend settings

# SQLAlchemy (choose SQLite/MySQL/PostgreSQL).

BACKEND_DB_MODULE = getattr(

    settings, 'PITHOS_BACKEND_DB_MODULE', 'pithos.backends.lib.sqlalchemy')

BACKEND_DB_CONNECTION = getattr(settings, 'PITHOS_BACKEND_DB_CONNECTION',

                                'sqlite:////tmp/pithos-backend.db')

# Block storage.

BACKEND_BLOCK_MODULE = getattr(

    settings, 'PITHOS_BACKEND_BLOCK_MODULE', 'pithos.backends.lib.hashfiler')

BACKEND_BLOCK_PATH = getattr(

    settings, 'PITHOS_BACKEND_BLOCK_PATH', '/tmp/pithos-data/')

BACKEND_BLOCK_UMASK = getattr(settings, 'PITHOS_BACKEND_BLOCK_UMASK', 0o022)

# Queue for billing.

BACKEND_QUEUE_MODULE = getattr(settings, 'PITHOS_BACKEND_QUEUE_MODULE', None)

# Example: 'pithos.backends.lib.rabbitmq'

BACKEND_QUEUE_HOSTS = getattr(settings, 'PITHOS_BACKEND_QUEUE_HOSTS', None)

# Example: "['amqp://guest:guest@localhost:5672']"

BACKEND_QUEUE_EXCHANGE = getattr(settings, 'PITHOS_BACKEND_QUEUE_EXCHANGE',

                                 'pithos')

# Default setting for new accounts.

BACKEND_ACCOUNT_QUOTA = getattr(

    settings, 'PITHOS_BACKEND_ACCOUNT_QUOTA', 50 * 1024 * 1024 * 1024)

BACKEND_CONTAINER_QUOTA = getattr(

    settings, 'PITHOS_BACKEND_CONTAINER_QUOTA', 0)

BACKEND_VERSIONING = getattr(settings, 'PITHOS_BACKEND_VERSIONING', 'auto')

BACKEND_FREE_VERSIONING = getattr(settings, 'PITHOS_BACKEND_FREE_VERSIONING',

                                  True)

# Enable backend pooling

BACKEND_POOL_ENABLED = getattr(settings, 'PITHOS_BACKEND_POOL_ENABLED', True)

# Default backend pool size

BACKEND_POOL_SIZE = getattr(settings, 'PITHOS_BACKEND_POOL_SIZE', 5)

# Update object checksums.

UPDATE_MD5 = getattr(settings, 'PITHOS_UPDATE_MD5', False)

RADOS_STORAGE = getattr(settings, 'PITHOS_RADOS_STORAGE', False)

RADOS_POOL_BLOCKS = getattr(settings, 'PITHOS_RADOS_POOL_BLOCKS', 'blocks')

RADOS_POOL_MAPS = getattr(settings, 'PITHOS_RADOS_POOL_MAPS', 'maps')

# This enables a ui compatibility layer for the introduction of UUIDs in

# identity management.  WARNING: Setting to True will break your installation.

TRANSLATE_UUIDS = getattr(settings, 'PITHOS_TRANSLATE_UUIDS', False)

# Set how many random bytes to use for constructing the URL

# of Pithos public files

PUBLIC_URL_SECURITY = getattr(settings, 'PITHOS_PUBLIC_URL_SECURITY', 16)

# Set the alphabet to use for constructing the URL of Pithos public files

PUBLIC_URL_ALPHABET = getattr(

    settings,

    'PITHOS_PUBLIC_URL_ALPHABET',

    '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ')

# The maximum number or items returned by the listing api methods

API_LIST_LIMIT = getattr(settings, 'PITHOS_API_LIST_LIMIT', 10000)

# The backend block size

BACKEND_BLOCK_SIZE = getattr(

    settings, 'PITHOS_BACKEND_BLOCK_SIZE', 4 * 1024 * 1024)

# The backend block hash algorithm

BACKEND_HASH_ALGORITHM = getattr(

    settings, 'PITHOS_BACKEND_HASH_ALGORITHM', 'sha256')

# Set the credentials (client identifier, client secret) issued for

# authenticating the views with astakos during the resource access token

# generation procedure

OAUTH2_CLIENT_CREDENTIALS = getattr(settings,

                                    'PITHOS_OAUTH2_CLIENT_CREDENTIALS',

                                    (None, None))

# Set domain to restrict requests of pithos object contents serve endpoint or

# None for no domain restriction

UNSAFE_DOMAIN = getattr(settings, 'PITHOS_UNSAFE_DOMAIN', None)