353 lines
16 KiB
Python
353 lines
16 KiB
Python
# Copyright (c) 2010-2012 OpenStack, LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import with_statement
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import os
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import time
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import traceback
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from urllib import unquote
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from xml.sax import saxutils
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from eventlet import Timeout
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from webob import Request, Response
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from webob.exc import HTTPAccepted, HTTPBadRequest, \
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HTTPCreated, HTTPForbidden, HTTPInternalServerError, \
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HTTPMethodNotAllowed, HTTPNoContent, HTTPNotFound, \
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HTTPPreconditionFailed, HTTPConflict
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import simplejson
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import swift.common.db
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from swift.common.db import AccountBroker
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from swift.common.utils import get_logger, get_param, hash_path, \
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normalize_timestamp, split_path, storage_directory, TRUE_VALUES
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from swift.common.constraints import ACCOUNT_LISTING_LIMIT, \
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check_mount, check_float, check_utf8
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from swift.common.db_replicator import ReplicatorRpc
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DATADIR = 'accounts'
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class AccountController(object):
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"""WSGI controller for the account server."""
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def __init__(self, conf):
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self.logger = get_logger(conf, log_route='account-server')
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self.root = conf.get('devices', '/srv/node')
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self.mount_check = conf.get('mount_check', 'true').lower() in \
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('true', 't', '1', 'on', 'yes', 'y')
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self.replicator_rpc = ReplicatorRpc(self.root, DATADIR, AccountBroker,
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self.mount_check, logger=self.logger)
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self.auto_create_account_prefix = \
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conf.get('auto_create_account_prefix') or '.'
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swift.common.db.DB_PREALLOCATION = \
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conf.get('db_preallocation', 't').lower() in TRUE_VALUES
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def _get_account_broker(self, drive, part, account):
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hsh = hash_path(account)
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db_dir = storage_directory(DATADIR, part, hsh)
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db_path = os.path.join(self.root, drive, db_dir, hsh + '.db')
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return AccountBroker(db_path, account=account, logger=self.logger)
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def DELETE(self, req):
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"""Handle HTTP DELETE request."""
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try:
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drive, part, account = split_path(unquote(req.path), 3)
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except ValueError, err:
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return HTTPBadRequest(body=str(err), content_type='text/plain',
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request=req)
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if self.mount_check and not check_mount(self.root, drive):
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return Response(status='507 %s is not mounted' % drive)
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if 'x-timestamp' not in req.headers or \
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not check_float(req.headers['x-timestamp']):
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return HTTPBadRequest(body='Missing timestamp', request=req,
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content_type='text/plain')
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broker = self._get_account_broker(drive, part, account)
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if broker.is_deleted():
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return HTTPNotFound(request=req)
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broker.delete_db(req.headers['x-timestamp'])
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return HTTPNoContent(request=req)
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def PUT(self, req):
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"""Handle HTTP PUT request."""
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try:
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drive, part, account, container = split_path(unquote(req.path),
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3, 4)
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except ValueError, err:
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return HTTPBadRequest(body=str(err), content_type='text/plain',
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request=req)
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if self.mount_check and not check_mount(self.root, drive):
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return Response(status='507 %s is not mounted' % drive)
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broker = self._get_account_broker(drive, part, account)
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if container: # put account container
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if 'x-trans-id' in req.headers:
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broker.pending_timeout = 3
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if account.startswith(self.auto_create_account_prefix) and \
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not os.path.exists(broker.db_file):
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broker.initialize(normalize_timestamp(
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req.headers.get('x-timestamp') or time.time()))
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if req.headers.get('x-account-override-deleted', 'no').lower() != \
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'yes' and broker.is_deleted():
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return HTTPNotFound(request=req)
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broker.put_container(container, req.headers['x-put-timestamp'],
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req.headers['x-delete-timestamp'],
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req.headers['x-object-count'],
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req.headers['x-bytes-used'])
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if req.headers['x-delete-timestamp'] > \
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req.headers['x-put-timestamp']:
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return HTTPNoContent(request=req)
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else:
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return HTTPCreated(request=req)
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else: # put account
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timestamp = normalize_timestamp(req.headers['x-timestamp'])
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if not os.path.exists(broker.db_file):
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broker.initialize(timestamp)
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created = True
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elif broker.is_status_deleted():
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return HTTPForbidden(request=req, body='Recently deleted')
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else:
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created = broker.is_deleted()
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broker.update_put_timestamp(timestamp)
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if broker.is_deleted():
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return HTTPConflict(request=req)
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metadata = {}
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metadata.update((key, (value, timestamp))
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for key, value in req.headers.iteritems()
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if key.lower().startswith('x-account-meta-'))
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if metadata:
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broker.update_metadata(metadata)
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if created:
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return HTTPCreated(request=req)
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else:
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return HTTPAccepted(request=req)
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def HEAD(self, req):
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"""Handle HTTP HEAD request."""
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# TODO(refactor): The account server used to provide a 'account and
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# container existence check all-in-one' call by doing a HEAD with a
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# container path. However, container existence is now checked with the
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# container servers directly so this is no longer needed. We should
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# refactor out the container existence check here and retest
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# everything.
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try:
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drive, part, account, container = split_path(unquote(req.path),
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3, 4)
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except ValueError, err:
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return HTTPBadRequest(body=str(err), content_type='text/plain',
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request=req)
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if self.mount_check and not check_mount(self.root, drive):
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return Response(status='507 %s is not mounted' % drive)
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broker = self._get_account_broker(drive, part, account)
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if not container:
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broker.pending_timeout = 0.1
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broker.stale_reads_ok = True
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if broker.is_deleted():
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return HTTPNotFound(request=req)
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info = broker.get_info()
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headers = {
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'X-Account-Container-Count': info['container_count'],
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'X-Account-Object-Count': info['object_count'],
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'X-Account-Bytes-Used': info['bytes_used'],
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'X-Timestamp': info['created_at'],
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'X-PUT-Timestamp': info['put_timestamp']}
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if container:
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container_ts = broker.get_container_timestamp(container)
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if container_ts is not None:
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headers['X-Container-Timestamp'] = container_ts
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headers.update((key, value)
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for key, (value, timestamp) in broker.metadata.iteritems()
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if value != '')
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return HTTPNoContent(request=req, headers=headers)
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def GET(self, req):
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"""Handle HTTP GET request."""
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try:
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drive, part, account = split_path(unquote(req.path), 3)
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except ValueError, err:
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return HTTPBadRequest(body=str(err), content_type='text/plain',
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request=req)
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if self.mount_check and not check_mount(self.root, drive):
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return Response(status='507 %s is not mounted' % drive)
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broker = self._get_account_broker(drive, part, account)
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broker.pending_timeout = 0.1
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broker.stale_reads_ok = True
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if broker.is_deleted():
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return HTTPNotFound(request=req)
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info = broker.get_info()
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resp_headers = {
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'X-Account-Container-Count': info['container_count'],
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'X-Account-Object-Count': info['object_count'],
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'X-Account-Bytes-Used': info['bytes_used'],
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'X-Timestamp': info['created_at'],
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'X-PUT-Timestamp': info['put_timestamp']}
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resp_headers.update((key, value)
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for key, (value, timestamp) in broker.metadata.iteritems()
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if value != '')
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try:
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prefix = get_param(req, 'prefix')
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delimiter = get_param(req, 'delimiter')
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if delimiter and (len(delimiter) > 1 or ord(delimiter) > 254):
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# delimiters can be made more flexible later
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return HTTPPreconditionFailed(body='Bad delimiter')
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limit = ACCOUNT_LISTING_LIMIT
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given_limit = get_param(req, 'limit')
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if given_limit and given_limit.isdigit():
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limit = int(given_limit)
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if limit > ACCOUNT_LISTING_LIMIT:
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return HTTPPreconditionFailed(request=req,
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body='Maximum limit is %d' % ACCOUNT_LISTING_LIMIT)
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marker = get_param(req, 'marker', '')
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end_marker = get_param(req, 'end_marker')
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query_format = get_param(req, 'format')
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except UnicodeDecodeError, err:
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return HTTPBadRequest(body='parameters not utf8',
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content_type='text/plain', request=req)
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if query_format:
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req.accept = 'application/%s' % query_format.lower()
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try:
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out_content_type = req.accept.best_match(
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['text/plain', 'application/json',
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'application/xml', 'text/xml'],
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default_match='text/plain')
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except AssertionError, err:
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return HTTPBadRequest(body='bad accept header: %s' % req.accept,
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content_type='text/plain', request=req)
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account_list = broker.list_containers_iter(limit, marker, end_marker,
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prefix, delimiter)
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if out_content_type == 'application/json':
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json_pattern = ['"name":%s', '"count":%s', '"bytes":%s']
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json_pattern = '{' + ','.join(json_pattern) + '}'
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json_out = []
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for (name, object_count, bytes_used, is_subdir) in account_list:
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name = simplejson.dumps(name)
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if is_subdir:
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json_out.append('{"subdir":%s}' % name)
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else:
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json_out.append(json_pattern %
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(name, object_count, bytes_used))
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account_list = '[' + ','.join(json_out) + ']'
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elif out_content_type.endswith('/xml'):
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output_list = ['<?xml version="1.0" encoding="UTF-8"?>',
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'<account name="%s">' % account]
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for (name, object_count, bytes_used, is_subdir) in account_list:
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name = saxutils.escape(name)
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if is_subdir:
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output_list.append('<subdir name="%s" />' % name)
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else:
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item = '<container><name>%s</name><count>%s</count>' \
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'<bytes>%s</bytes></container>' % \
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(name, object_count, bytes_used)
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output_list.append(item)
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output_list.append('</account>')
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account_list = '\n'.join(output_list)
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else:
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if not account_list:
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return HTTPNoContent(request=req, headers=resp_headers)
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account_list = '\n'.join(r[0] for r in account_list) + '\n'
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ret = Response(body=account_list, request=req, headers=resp_headers)
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ret.content_type = out_content_type
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ret.charset = 'utf-8'
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return ret
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def REPLICATE(self, req):
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"""
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Handle HTTP REPLICATE request.
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Handler for RPC calls for account replication.
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"""
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try:
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post_args = split_path(unquote(req.path), 3)
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except ValueError, err:
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return HTTPBadRequest(body=str(err), content_type='text/plain',
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request=req)
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drive, partition, hash = post_args
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if self.mount_check and not check_mount(self.root, drive):
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return Response(status='507 %s is not mounted' % drive)
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try:
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args = simplejson.load(req.environ['wsgi.input'])
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except ValueError, err:
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return HTTPBadRequest(body=str(err), content_type='text/plain')
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ret = self.replicator_rpc.dispatch(post_args, args)
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ret.request = req
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return ret
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def POST(self, req):
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"""Handle HTTP POST request."""
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try:
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drive, part, account = split_path(unquote(req.path), 3)
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except ValueError, err:
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return HTTPBadRequest(body=str(err), content_type='text/plain',
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request=req)
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if 'x-timestamp' not in req.headers or \
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not check_float(req.headers['x-timestamp']):
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return HTTPBadRequest(body='Missing or bad timestamp',
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request=req, content_type='text/plain')
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if self.mount_check and not check_mount(self.root, drive):
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return Response(status='507 %s is not mounted' % drive)
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broker = self._get_account_broker(drive, part, account)
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if broker.is_deleted():
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return HTTPNotFound(request=req)
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timestamp = normalize_timestamp(req.headers['x-timestamp'])
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metadata = {}
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metadata.update((key, (value, timestamp))
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for key, value in req.headers.iteritems()
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if key.lower().startswith('x-account-meta-'))
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if metadata:
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broker.update_metadata(metadata)
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return HTTPNoContent(request=req)
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def __call__(self, env, start_response):
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start_time = time.time()
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req = Request(env)
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self.logger.txn_id = req.headers.get('x-trans-id', None)
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if not check_utf8(req.path_info):
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res = HTTPPreconditionFailed(body='Invalid UTF8')
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else:
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try:
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if hasattr(self, req.method):
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res = getattr(self, req.method)(req)
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else:
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res = HTTPMethodNotAllowed()
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except (Exception, Timeout):
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self.logger.exception(_('ERROR __call__ error with %(method)s'
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' %(path)s '), {'method': req.method, 'path': req.path})
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res = HTTPInternalServerError(body=traceback.format_exc())
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trans_time = '%.4f' % (time.time() - start_time)
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additional_info = ''
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if res.headers.get('x-container-timestamp') is not None:
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additional_info += 'x-container-timestamp: %s' % \
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res.headers['x-container-timestamp']
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log_message = '%s - - [%s] "%s %s" %s %s "%s" "%s" "%s" %s "%s"' % (
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req.remote_addr,
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time.strftime('%d/%b/%Y:%H:%M:%S +0000', time.gmtime()),
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req.method, req.path,
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res.status.split()[0], res.content_length or '-',
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req.headers.get('x-trans-id', '-'),
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req.referer or '-', req.user_agent or '-',
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trans_time,
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additional_info)
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if req.method.upper() == 'REPLICATE':
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self.logger.debug(log_message)
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else:
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self.logger.info(log_message)
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return res(env, start_response)
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def app_factory(global_conf, **local_conf):
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"""paste.deploy app factory for creating WSGI account server apps"""
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conf = global_conf.copy()
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conf.update(local_conf)
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return AccountController(conf)
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