450 lines
21 KiB
Python
450 lines
21 KiB
Python
# Copyright (c) 2010-2011 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 datetime import datetime
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import simplejson
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from eventlet.timeout import Timeout
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from eventlet import TimeoutError
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from webob import Request, Response
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from webob.exc import HTTPAccepted, HTTPBadRequest, HTTPConflict, \
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HTTPCreated, HTTPInternalServerError, HTTPNoContent, \
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HTTPNotFound, HTTPPreconditionFailed, HTTPMethodNotAllowed
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from swift.common.db import ContainerBroker
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from swift.common.utils import get_logger, get_param, hash_path, \
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normalize_timestamp, storage_directory, split_path, validate_sync_to
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from swift.common.constraints import CONTAINER_LISTING_LIMIT, \
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check_mount, check_float, check_utf8
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from swift.common.bufferedhttp import http_connect
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from swift.common.exceptions import ConnectionTimeout
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from swift.common.db_replicator import ReplicatorRpc
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DATADIR = 'containers'
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class ContainerController(object):
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"""WSGI Controller for the container server."""
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# Ensure these are all lowercase
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save_headers = ['x-container-read', 'x-container-write',
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'x-container-sync-key', 'x-container-sync-to']
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def __init__(self, conf):
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self.logger = get_logger(conf, log_route='container-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.node_timeout = int(conf.get('node_timeout', 3))
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self.conn_timeout = float(conf.get('conn_timeout', 0.5))
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self.allowed_sync_hosts = [h.strip()
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for h in conf.get('allowed_sync_hosts', '127.0.0.1').split(',')
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if h.strip()]
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self.replicator_rpc = ReplicatorRpc(self.root, DATADIR,
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ContainerBroker, self.mount_check, logger=self.logger)
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def _get_container_broker(self, drive, part, account, container):
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"""
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Get a DB broker for the container.
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:param drive: drive that holds the container
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:param part: partition the container is in
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:param account: account name
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:param container: container name
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:returns: ContainerBroker object
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"""
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hsh = hash_path(account, container)
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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 ContainerBroker(db_path, account=account, container=container,
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logger=self.logger)
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def account_update(self, req, account, container, broker):
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"""
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Update the account server with latest container info.
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:param req: webob.Request object
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:param account: account name
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:param container: container name
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:param borker: container DB broker object
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:returns: if the account request returns a 404 error code,
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HTTPNotFound response object, otherwise None.
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"""
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account_host = req.headers.get('X-Account-Host')
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account_partition = req.headers.get('X-Account-Partition')
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account_device = req.headers.get('X-Account-Device')
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if all([account_host, account_partition, account_device]):
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account_ip, account_port = account_host.rsplit(':', 1)
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new_path = '/' + '/'.join([account, container])
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info = broker.get_info()
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account_headers = {'x-put-timestamp': info['put_timestamp'],
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'x-delete-timestamp': info['delete_timestamp'],
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'x-object-count': info['object_count'],
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'x-bytes-used': info['bytes_used'],
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'x-trans-id': req.headers.get('x-trans-id', '-')}
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if req.headers.get('x-account-override-deleted', 'no').lower() == \
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'yes':
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account_headers['x-account-override-deleted'] = 'yes'
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try:
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with ConnectionTimeout(self.conn_timeout):
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conn = http_connect(account_ip, account_port,
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account_device, account_partition, 'PUT', new_path,
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account_headers)
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with Timeout(self.node_timeout):
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account_response = conn.getresponse()
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account_response.read()
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if account_response.status == 404:
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return HTTPNotFound(request=req)
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elif account_response.status < 200 or \
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account_response.status > 299:
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self.logger.error(_('ERROR Account update failed '
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'with %(ip)s:%(port)s/%(device)s (will retry '
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'later): Response %(status)s %(reason)s'),
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{'ip': account_ip, 'port': account_port,
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'device': account_device,
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'status': account_response.status,
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'reason': account_response.reason})
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except (Exception, TimeoutError):
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self.logger.exception(_('ERROR account update failed with '
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'%(ip)s:%(port)s/%(device)s (will retry later)'),
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{'ip': account_ip, 'port': account_port,
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'device': account_device})
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return None
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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, container, obj = split_path(
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unquote(req.path), 4, 5, True)
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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 timestamp', request=req,
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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_container_broker(drive, part, account, container)
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if not os.path.exists(broker.db_file):
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return HTTPNotFound()
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if obj: # delete object
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broker.delete_object(obj, req.headers.get('x-timestamp'))
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return HTTPNoContent(request=req)
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else:
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# delete container
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if not broker.empty():
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return HTTPConflict(request=req)
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existed = float(broker.get_info()['put_timestamp']) and \
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not broker.is_deleted()
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broker.delete_db(req.headers['X-Timestamp'])
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if not broker.is_deleted():
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return HTTPConflict(request=req)
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resp = self.account_update(req, account, container, broker)
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if resp:
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return resp
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if existed:
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return HTTPNoContent(request=req)
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return HTTPNotFound()
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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, obj = split_path(
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unquote(req.path), 4, 5, True)
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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 timestamp', request=req,
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content_type='text/plain')
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if 'x-container-sync-to' in req.headers:
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err = validate_sync_to(req.headers['x-container-sync-to'],
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self.allowed_sync_hosts)
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if err:
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return HTTPBadRequest(err)
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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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timestamp = normalize_timestamp(req.headers['x-timestamp'])
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broker = self._get_container_broker(drive, part, account, container)
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if obj: # put container object
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if not os.path.exists(broker.db_file):
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return HTTPNotFound()
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broker.put_object(obj, timestamp, int(req.headers['x-size']),
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req.headers['x-content-type'], req.headers['x-etag'])
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return HTTPCreated(request=req)
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else: # put container
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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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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() in self.save_headers or
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key.lower().startswith('x-container-meta-'))
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if metadata:
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if 'X-Container-Sync-To' in metadata:
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if 'X-Container-Sync-To' not in broker.metadata or \
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metadata['X-Container-Sync-To'][0] != \
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broker.metadata['X-Container-Sync-To'][0]:
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broker.set_x_container_sync_points(-1, -1)
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broker.update_metadata(metadata)
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resp = self.account_update(req, account, container, broker)
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if resp:
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return resp
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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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try:
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drive, part, account, container, obj = split_path(
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unquote(req.path), 4, 5, True)
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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_container_broker(drive, part, account, 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-Container-Object-Count': info['object_count'],
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'X-Container-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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}
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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 != '' and (key.lower() in self.save_headers or
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key.lower().startswith('x-container-meta-')))
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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, container, obj = split_path(
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unquote(req.path), 4, 5, True)
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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_container_broker(drive, part, account, 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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resp_headers = {
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'X-Container-Object-Count': info['object_count'],
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'X-Container-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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}
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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 != '' and (key.lower() in self.save_headers or
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key.lower().startswith('x-container-meta-')))
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try:
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path = get_param(req, 'path')
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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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marker = get_param(req, 'marker', '')
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end_marker = get_param(req, 'end_marker')
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limit = CONTAINER_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 > CONTAINER_LISTING_LIMIT:
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return HTTPPreconditionFailed(request=req,
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body='Maximum limit is %d' % CONTAINER_LISTING_LIMIT)
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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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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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container_list = broker.list_objects_iter(limit, marker, end_marker,
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prefix, delimiter, path)
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if out_content_type == 'application/json':
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json_pattern = ['"name":%s', '"hash":"%s"', '"bytes":%s',
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'"content_type":%s, "last_modified":"%s"']
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json_pattern = '{' + ','.join(json_pattern) + '}'
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json_out = []
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for (name, created_at, size, content_type, etag) in container_list:
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# escape name and format date here
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name = simplejson.dumps(name)
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created_at = datetime.utcfromtimestamp(
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float(created_at)).isoformat()
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if content_type is None:
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json_out.append('{"subdir":%s}' % name)
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else:
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content_type = simplejson.dumps(content_type)
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json_out.append(json_pattern % (name,
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etag,
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size,
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content_type,
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created_at))
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container_list = '[' + ','.join(json_out) + ']'
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elif out_content_type.endswith('/xml'):
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xml_output = []
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for (name, created_at, size, content_type, etag) in container_list:
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# escape name and format date here
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name = saxutils.escape(name)
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created_at = datetime.utcfromtimestamp(
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float(created_at)).isoformat()
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if content_type is None:
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xml_output.append('<subdir name="%s"><name>%s</name>'
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'</subdir>' % (name, name))
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else:
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content_type = saxutils.escape(content_type)
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xml_output.append('<object><name>%s</name><hash>%s</hash>'\
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'<bytes>%d</bytes><content_type>%s</content_type>'\
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'<last_modified>%s</last_modified></object>' % \
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(name, etag, size, content_type, created_at))
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container_list = ''.join([
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'<?xml version="1.0" encoding="UTF-8"?>\n',
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'<container name=%s>' % saxutils.quoteattr(container),
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''.join(xml_output), '</container>'])
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else:
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if not container_list:
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return HTTPNoContent(request=req, headers=resp_headers)
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container_list = '\n'.join(r[0] for r in container_list) + '\n'
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ret = Response(body=container_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 (json-encoded RPC calls for 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, container = split_path(unquote(req.path), 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 '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 'x-container-sync-to' in req.headers:
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err = validate_sync_to(req.headers['x-container-sync-to'],
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self.allowed_sync_hosts)
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if err:
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return HTTPBadRequest(err)
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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_container_broker(drive, part, account, container)
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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() in self.save_headers or
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key.lower().startswith('x-container-meta-'))
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if metadata:
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if 'X-Container-Sync-To' in metadata:
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if 'X-Container-Sync-To' not in broker.metadata or \
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metadata['X-Container-Sync-To'][0] != \
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broker.metadata['X-Container-Sync-To'][0]:
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broker.set_x_container_sync_points(-1, -1)
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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:
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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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log_message = '%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',
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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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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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|
|
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def app_factory(global_conf, **local_conf):
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"""paste.deploy app factory for creating WSGI container server apps"""
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conf = global_conf.copy()
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conf.update(local_conf)
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return ContainerController(conf)
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