/usr/lib/python2.7/dist-packages/swift/account/server.py is in python-swift 2.7.0-0ubuntu2.
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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import time
import traceback
from swift import gettext_ as _
from eventlet import Timeout
import swift.common.db
from swift.account.backend import AccountBroker, DATADIR
from swift.account.utils import account_listing_response, get_response_headers
from swift.common.db import DatabaseConnectionError, DatabaseAlreadyExists
from swift.common.request_helpers import get_param, get_listing_content_type, \
split_and_validate_path
from swift.common.utils import get_logger, hash_path, public, \
Timestamp, storage_directory, config_true_value, \
json, timing_stats, replication, get_log_line
from swift.common.constraints import check_mount, valid_timestamp, check_utf8
from swift.common import constraints
from swift.common.db_replicator import ReplicatorRpc
from swift.common.base_storage_server import BaseStorageServer
from swift.common.swob import HTTPAccepted, HTTPBadRequest, \
HTTPCreated, HTTPForbidden, HTTPInternalServerError, \
HTTPMethodNotAllowed, HTTPNoContent, HTTPNotFound, \
HTTPPreconditionFailed, HTTPConflict, Request, \
HTTPInsufficientStorage, HTTPException
from swift.common.request_helpers import is_sys_or_user_meta
class AccountController(BaseStorageServer):
"""WSGI controller for the account server."""
server_type = 'account-server'
def __init__(self, conf, logger=None):
super(AccountController, self).__init__(conf)
self.logger = logger or get_logger(conf, log_route='account-server')
self.log_requests = config_true_value(conf.get('log_requests', 'true'))
self.root = conf.get('devices', '/srv/node')
self.mount_check = config_true_value(conf.get('mount_check', 'true'))
self.replicator_rpc = ReplicatorRpc(self.root, DATADIR, AccountBroker,
self.mount_check,
logger=self.logger)
self.auto_create_account_prefix = \
conf.get('auto_create_account_prefix') or '.'
swift.common.db.DB_PREALLOCATION = \
config_true_value(conf.get('db_preallocation', 'f'))
def _get_account_broker(self, drive, part, account, **kwargs):
hsh = hash_path(account)
db_dir = storage_directory(DATADIR, part, hsh)
db_path = os.path.join(self.root, drive, db_dir, hsh + '.db')
kwargs.setdefault('account', account)
kwargs.setdefault('logger', self.logger)
return AccountBroker(db_path, **kwargs)
def _deleted_response(self, broker, req, resp, body=''):
# We are here since either the account does not exist or
# it exists but marked for deletion.
headers = {}
# Try to check if account exists and is marked for deletion
try:
if broker.is_status_deleted():
# Account does exist and is marked for deletion
headers = {'X-Account-Status': 'Deleted'}
except DatabaseConnectionError:
# Account does not exist!
pass
return resp(request=req, headers=headers, charset='utf-8', body=body)
@public
@timing_stats()
def DELETE(self, req):
"""Handle HTTP DELETE request."""
drive, part, account = split_and_validate_path(req, 3)
if self.mount_check and not check_mount(self.root, drive):
return HTTPInsufficientStorage(drive=drive, request=req)
req_timestamp = valid_timestamp(req)
broker = self._get_account_broker(drive, part, account)
if broker.is_deleted():
return self._deleted_response(broker, req, HTTPNotFound)
broker.delete_db(req_timestamp.internal)
return self._deleted_response(broker, req, HTTPNoContent)
@public
@timing_stats()
def PUT(self, req):
"""Handle HTTP PUT request."""
drive, part, account, container = split_and_validate_path(req, 3, 4)
if self.mount_check and not check_mount(self.root, drive):
return HTTPInsufficientStorage(drive=drive, request=req)
if container: # put account container
if 'x-timestamp' not in req.headers:
timestamp = Timestamp(time.time())
else:
timestamp = valid_timestamp(req)
pending_timeout = None
container_policy_index = \
req.headers.get('X-Backend-Storage-Policy-Index', 0)
if 'x-trans-id' in req.headers:
pending_timeout = 3
broker = self._get_account_broker(drive, part, account,
pending_timeout=pending_timeout)
if account.startswith(self.auto_create_account_prefix) and \
not os.path.exists(broker.db_file):
try:
broker.initialize(timestamp.internal)
except DatabaseAlreadyExists:
pass
if req.headers.get('x-account-override-deleted', 'no').lower() != \
'yes' and broker.is_deleted():
return HTTPNotFound(request=req)
broker.put_container(container, req.headers['x-put-timestamp'],
req.headers['x-delete-timestamp'],
req.headers['x-object-count'],
req.headers['x-bytes-used'],
container_policy_index)
if req.headers['x-delete-timestamp'] > \
req.headers['x-put-timestamp']:
return HTTPNoContent(request=req)
else:
return HTTPCreated(request=req)
else: # put account
timestamp = valid_timestamp(req)
broker = self._get_account_broker(drive, part, account)
if not os.path.exists(broker.db_file):
try:
broker.initialize(timestamp.internal)
created = True
except DatabaseAlreadyExists:
created = False
elif broker.is_status_deleted():
return self._deleted_response(broker, req, HTTPForbidden,
body='Recently deleted')
else:
created = broker.is_deleted()
broker.update_put_timestamp(timestamp.internal)
if broker.is_deleted():
return HTTPConflict(request=req)
metadata = {}
metadata.update((key, (value, timestamp.internal))
for key, value in req.headers.items()
if is_sys_or_user_meta('account', key))
if metadata:
broker.update_metadata(metadata, validate_metadata=True)
if created:
return HTTPCreated(request=req)
else:
return HTTPAccepted(request=req)
@public
@timing_stats()
def HEAD(self, req):
"""Handle HTTP HEAD request."""
drive, part, account = split_and_validate_path(req, 3)
out_content_type = get_listing_content_type(req)
if self.mount_check and not check_mount(self.root, drive):
return HTTPInsufficientStorage(drive=drive, request=req)
broker = self._get_account_broker(drive, part, account,
pending_timeout=0.1,
stale_reads_ok=True)
if broker.is_deleted():
return self._deleted_response(broker, req, HTTPNotFound)
headers = get_response_headers(broker)
headers['Content-Type'] = out_content_type
return HTTPNoContent(request=req, headers=headers, charset='utf-8')
@public
@timing_stats()
def GET(self, req):
"""Handle HTTP GET request."""
drive, part, account = split_and_validate_path(req, 3)
prefix = get_param(req, 'prefix')
delimiter = get_param(req, 'delimiter')
if delimiter and (len(delimiter) > 1 or ord(delimiter) > 254):
# delimiters can be made more flexible later
return HTTPPreconditionFailed(body='Bad delimiter')
limit = constraints.ACCOUNT_LISTING_LIMIT
given_limit = get_param(req, 'limit')
reverse = config_true_value(get_param(req, 'reverse'))
if given_limit and given_limit.isdigit():
limit = int(given_limit)
if limit > constraints.ACCOUNT_LISTING_LIMIT:
return HTTPPreconditionFailed(
request=req,
body='Maximum limit is %d' %
constraints.ACCOUNT_LISTING_LIMIT)
marker = get_param(req, 'marker', '')
end_marker = get_param(req, 'end_marker')
out_content_type = get_listing_content_type(req)
if self.mount_check and not check_mount(self.root, drive):
return HTTPInsufficientStorage(drive=drive, request=req)
broker = self._get_account_broker(drive, part, account,
pending_timeout=0.1,
stale_reads_ok=True)
if broker.is_deleted():
return self._deleted_response(broker, req, HTTPNotFound)
return account_listing_response(account, req, out_content_type, broker,
limit, marker, end_marker, prefix,
delimiter, reverse)
@public
@replication
@timing_stats()
def REPLICATE(self, req):
"""
Handle HTTP REPLICATE request.
Handler for RPC calls for account replication.
"""
post_args = split_and_validate_path(req, 3)
drive, partition, hash = post_args
if self.mount_check and not check_mount(self.root, drive):
return HTTPInsufficientStorage(drive=drive, request=req)
try:
args = json.load(req.environ['wsgi.input'])
except ValueError as err:
return HTTPBadRequest(body=str(err), content_type='text/plain')
ret = self.replicator_rpc.dispatch(post_args, args)
ret.request = req
return ret
@public
@timing_stats()
def POST(self, req):
"""Handle HTTP POST request."""
drive, part, account = split_and_validate_path(req, 3)
req_timestamp = valid_timestamp(req)
if self.mount_check and not check_mount(self.root, drive):
return HTTPInsufficientStorage(drive=drive, request=req)
broker = self._get_account_broker(drive, part, account)
if broker.is_deleted():
return self._deleted_response(broker, req, HTTPNotFound)
metadata = {}
metadata.update((key, (value, req_timestamp.internal))
for key, value in req.headers.items()
if is_sys_or_user_meta('account', key))
if metadata:
broker.update_metadata(metadata, validate_metadata=True)
return HTTPNoContent(request=req)
def __call__(self, env, start_response):
start_time = time.time()
req = Request(env)
self.logger.txn_id = req.headers.get('x-trans-id', None)
if not check_utf8(req.path_info):
res = HTTPPreconditionFailed(body='Invalid UTF8 or contains NULL')
else:
try:
# disallow methods which are not publicly accessible
try:
if req.method not in self.allowed_methods:
raise AttributeError('Not allowed method.')
except AttributeError:
res = HTTPMethodNotAllowed()
else:
method = getattr(self, req.method)
res = method(req)
except HTTPException as error_response:
res = error_response
except (Exception, Timeout):
self.logger.exception(_('ERROR __call__ error with %(method)s'
' %(path)s '),
{'method': req.method, 'path': req.path})
res = HTTPInternalServerError(body=traceback.format_exc())
if self.log_requests:
trans_time = time.time() - start_time
additional_info = ''
if res.headers.get('x-container-timestamp') is not None:
additional_info += 'x-container-timestamp: %s' % \
res.headers['x-container-timestamp']
log_msg = get_log_line(req, res, trans_time, additional_info)
if req.method.upper() == 'REPLICATE':
self.logger.debug(log_msg)
else:
self.logger.info(log_msg)
return res(env, start_response)
def app_factory(global_conf, **local_conf):
"""paste.deploy app factory for creating WSGI account server apps"""
conf = global_conf.copy()
conf.update(local_conf)
return AccountController(conf)
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