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# Copyright (c) 2010-2012 OpenStack, LLC.
#
# 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.
from __future__ import with_statement
import os
import time
import traceback
from urllib import unquote
from xml.sax import saxutils
from eventlet import Timeout
from webob import Request, Response
from webob.exc import HTTPAccepted, HTTPBadRequest, \
HTTPCreated, HTTPForbidden, HTTPInternalServerError, \
HTTPMethodNotAllowed, HTTPNoContent, HTTPNotFound, \
HTTPPreconditionFailed, HTTPConflict
import simplejson
from swift.common.db import AccountBroker
from swift.common.utils import get_logger, get_param, hash_path, \
normalize_timestamp, split_path, storage_directory
from swift.common.constraints import ACCOUNT_LISTING_LIMIT, \
check_mount, check_float, check_utf8
from swift.common.db_replicator import ReplicatorRpc
DATADIR = 'accounts'
class AccountController(object):
"""WSGI controller for the account server."""
def __init__(self, conf):
self.logger = get_logger(conf, log_route='account-server')
self.root = conf.get('devices', '/srv/node')
self.mount_check = conf.get('mount_check', 'true').lower() in \
('true', 't', '1', 'on', 'yes', 'y')
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 '.'
def _get_account_broker(self, drive, part, account):
hsh = hash_path(account)
db_dir = storage_directory(DATADIR, part, hsh)
db_path = os.path.join(self.root, drive, db_dir, hsh + '.db')
return AccountBroker(db_path, account=account, logger=self.logger)
def DELETE(self, req):
"""Handle HTTP DELETE request."""
try:
drive, part, account = split_path(unquote(req.path), 3)
except ValueError, err:
return HTTPBadRequest(body=str(err), content_type='text/plain',
request=req)
if self.mount_check and not check_mount(self.root, drive):
return Response(status='507 %s is not mounted' % drive)
if 'x-timestamp' not in req.headers or \
not check_float(req.headers['x-timestamp']):
return HTTPBadRequest(body='Missing timestamp', request=req,
content_type='text/plain')
broker = self._get_account_broker(drive, part, account)
if broker.is_deleted():
return HTTPNotFound(request=req)
broker.delete_db(req.headers['x-timestamp'])
return HTTPNoContent(request=req)
def PUT(self, req):
"""Handle HTTP PUT request."""
try:
drive, part, account, container = split_path(unquote(req.path),
3, 4)
except ValueError, err:
return HTTPBadRequest(body=str(err), content_type='text/plain',
request=req)
if self.mount_check and not check_mount(self.root, drive):
return Response(status='507 %s is not mounted' % drive)
broker = self._get_account_broker(drive, part, account)
if container: # put account container
if 'x-trans-id' in req.headers:
broker.pending_timeout = 3
if account.startswith(self.auto_create_account_prefix) and \
not os.path.exists(broker.db_file):
broker.initialize(normalize_timestamp(
req.headers.get('x-timestamp') or time.time()))
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'])
if req.headers['x-delete-timestamp'] > \
req.headers['x-put-timestamp']:
return HTTPNoContent(request=req)
else:
return HTTPCreated(request=req)
else: # put account
timestamp = normalize_timestamp(req.headers['x-timestamp'])
if not os.path.exists(broker.db_file):
broker.initialize(timestamp)
created = True
elif broker.is_status_deleted():
return HTTPForbidden(request=req, body='Recently deleted')
else:
created = broker.is_deleted()
broker.update_put_timestamp(timestamp)
if broker.is_deleted():
return HTTPConflict(request=req)
metadata = {}
metadata.update((key, (value, timestamp))
for key, value in req.headers.iteritems()
if key.lower().startswith('x-account-meta-'))
if metadata:
broker.update_metadata(metadata)
if created:
return HTTPCreated(request=req)
else:
return HTTPAccepted(request=req)
def HEAD(self, req):
"""Handle HTTP HEAD request."""
# TODO(refactor): The account server used to provide a 'account and
# container existence check all-in-one' call by doing a HEAD with a
# container path. However, container existence is now checked with the
# container servers directly so this is no longer needed. We should
# refactor out the container existence check here and retest
# everything.
try:
drive, part, account, container = split_path(unquote(req.path),
3, 4)
except ValueError, err:
return HTTPBadRequest(body=str(err), content_type='text/plain',
request=req)
if self.mount_check and not check_mount(self.root, drive):
return Response(status='507 %s is not mounted' % drive)
broker = self._get_account_broker(drive, part, account)
if not container:
broker.pending_timeout = 0.1
broker.stale_reads_ok = True
if broker.is_deleted():
return HTTPNotFound(request=req)
info = broker.get_info()
headers = {
'X-Account-Container-Count': info['container_count'],
'X-Account-Object-Count': info['object_count'],
'X-Account-Bytes-Used': info['bytes_used'],
'X-Timestamp': info['created_at'],
'X-PUT-Timestamp': info['put_timestamp']}
if container:
container_ts = broker.get_container_timestamp(container)
if container_ts is not None:
headers['X-Container-Timestamp'] = container_ts
headers.update((key, value)
for key, (value, timestamp) in broker.metadata.iteritems()
if value != '')
return HTTPNoContent(request=req, headers=headers)
def GET(self, req):
"""Handle HTTP GET request."""
try:
drive, part, account = split_path(unquote(req.path), 3)
except ValueError, err:
return HTTPBadRequest(body=str(err), content_type='text/plain',
request=req)
if self.mount_check and not check_mount(self.root, drive):
return Response(status='507 %s is not mounted' % drive)
broker = self._get_account_broker(drive, part, account)
broker.pending_timeout = 0.1
broker.stale_reads_ok = True
if broker.is_deleted():
return HTTPNotFound(request=req)
info = broker.get_info()
resp_headers = {
'X-Account-Container-Count': info['container_count'],
'X-Account-Object-Count': info['object_count'],
'X-Account-Bytes-Used': info['bytes_used'],
'X-Timestamp': info['created_at'],
'X-PUT-Timestamp': info['put_timestamp']}
resp_headers.update((key, value)
for key, (value, timestamp) in broker.metadata.iteritems()
if value != '')
try:
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 = ACCOUNT_LISTING_LIMIT
given_limit = get_param(req, 'limit')
if given_limit and given_limit.isdigit():
limit = int(given_limit)
if limit > ACCOUNT_LISTING_LIMIT:
return HTTPPreconditionFailed(request=req,
body='Maximum limit is %d' % ACCOUNT_LISTING_LIMIT)
marker = get_param(req, 'marker', '')
end_marker = get_param(req, 'end_marker')
query_format = get_param(req, 'format')
except UnicodeDecodeError, err:
return HTTPBadRequest(body='parameters not utf8',
content_type='text/plain', request=req)
if query_format:
req.accept = 'application/%s' % query_format.lower()
try:
out_content_type = req.accept.best_match(
['text/plain', 'application/json',
'application/xml', 'text/xml'],
default_match='text/plain')
except AssertionError, err:
return HTTPBadRequest(body='bad accept header: %s' % req.accept,
content_type='text/plain', request=req)
account_list = broker.list_containers_iter(limit, marker, end_marker,
prefix, delimiter)
if out_content_type == 'application/json':
json_pattern = ['"name":%s', '"count":%s', '"bytes":%s']
json_pattern = '{' + ','.join(json_pattern) + '}'
json_out = []
for (name, object_count, bytes_used, is_subdir) in account_list:
name = simplejson.dumps(name)
if is_subdir:
json_out.append('{"subdir":%s}' % name)
else:
json_out.append(json_pattern %
(name, object_count, bytes_used))
account_list = '[' + ','.join(json_out) + ']'
elif out_content_type.endswith('/xml'):
output_list = ['<?xml version="1.0" encoding="UTF-8"?>',
'<account name="%s">' % saxutils.escape(account)]
for (name, object_count, bytes_used, is_subdir) in account_list:
name = saxutils.escape(name)
if is_subdir:
output_list.append('<subdir name="%s" />' % name)
else:
item = '<container><name>%s</name><count>%s</count>' \
'<bytes>%s</bytes></container>' % \
(name, object_count, bytes_used)
output_list.append(item)
output_list.append('</account>')
account_list = '\n'.join(output_list)
else:
if not account_list:
return HTTPNoContent(request=req, headers=resp_headers)
account_list = '\n'.join(r[0] for r in account_list) + '\n'
ret = Response(body=account_list, request=req, headers=resp_headers)
ret.content_type = out_content_type
ret.charset = 'utf-8'
return ret
def REPLICATE(self, req):
"""
Handle HTTP REPLICATE request.
Handler for RPC calls for account replication.
"""
try:
post_args = split_path(unquote(req.path), 3)
except ValueError, err:
return HTTPBadRequest(body=str(err), content_type='text/plain',
request=req)
drive, partition, hash = post_args
if self.mount_check and not check_mount(self.root, drive):
return Response(status='507 %s is not mounted' % drive)
try:
args = simplejson.load(req.environ['wsgi.input'])
except ValueError, err:
return HTTPBadRequest(body=str(err), content_type='text/plain')
ret = self.replicator_rpc.dispatch(post_args, args)
ret.request = req
return ret
def POST(self, req):
"""Handle HTTP POST request."""
try:
drive, part, account = split_path(unquote(req.path), 3)
except ValueError, err:
return HTTPBadRequest(body=str(err), content_type='text/plain',
request=req)
if 'x-timestamp' not in req.headers or \
not check_float(req.headers['x-timestamp']):
return HTTPBadRequest(body='Missing or bad timestamp',
request=req, content_type='text/plain')
if self.mount_check and not check_mount(self.root, drive):
return Response(status='507 %s is not mounted' % drive)
broker = self._get_account_broker(drive, part, account)
if broker.is_deleted():
return HTTPNotFound(request=req)
timestamp = normalize_timestamp(req.headers['x-timestamp'])
metadata = {}
metadata.update((key, (value, timestamp))
for key, value in req.headers.iteritems()
if key.lower().startswith('x-account-meta-'))
if metadata:
broker.update_metadata(metadata)
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')
else:
try:
if hasattr(self, req.method):
res = getattr(self, req.method)(req)
else:
res = HTTPMethodNotAllowed()
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())
trans_time = '%.4f' % (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_message = '%s - - [%s] "%s %s" %s %s "%s" "%s" "%s" %s "%s"' % (
req.remote_addr,
time.strftime('%d/%b/%Y:%H:%M:%S +0000', time.gmtime()),
req.method, req.path,
res.status.split()[0], res.content_length or '-',
req.headers.get('x-trans-id', '-'),
req.referer or '-', req.user_agent or '-',
trans_time,
additional_info)
if req.method.upper() == 'REPLICATE':
self.logger.debug(log_message)
else:
self.logger.info(log_message)
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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