# Copyright (c) 2013 OpenStack Foundation
#
# 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 io
import os
import shutil
import tempfile
import unittest

import eventlet
import mock
import six

from swift.common import bufferedhttp
from swift.common import exceptions
from swift.common import swob
from swift.common.storage_policy import POLICIES
from swift.common import utils
from swift.common.swob import HTTPException
from swift.obj import diskfile
from swift.obj import server
from swift.obj import ssync_receiver, ssync_sender
from swift.obj.reconstructor import ObjectReconstructor

from test import listen_zero, unit
from test.debug_logger import debug_logger
from test.unit import (patch_policies, make_timestamp_iter, mock_check_drive,
                       skip_if_no_xattrs)
from test.unit.obj.common import write_diskfile


if six.PY2:
    UNPACK_ERR = b":ERROR: 0 'need more than 1 value to unpack'"
else:
    UNPACK_ERR = b":ERROR: 0 'not enough values to unpack (expected 2, got 1)'"


@unit.patch_policies()
class TestReceiver(unittest.TestCase):

    def setUp(self):
        skip_if_no_xattrs()
        utils.HASH_PATH_SUFFIX = b'endcap'
        utils.HASH_PATH_PREFIX = b'startcap'
        # Not sure why the test.unit stuff isn't taking effect here; so I'm
        # reinforcing it.
        self.testdir = os.path.join(
            tempfile.mkdtemp(), 'tmp_test_ssync_receiver')
        utils.mkdirs(os.path.join(self.testdir, 'sda1', 'tmp'))
        self.conf = {
            'devices': self.testdir,
            'mount_check': 'false',
            'replication_concurrency_per_device': '0',
            'log_requests': 'false'}
        utils.mkdirs(os.path.join(self.testdir, 'device', 'partition'))
        self.logger = debug_logger()
        self.controller = server.ObjectController(
            self.conf, logger=self.logger)
        self.controller.bytes_per_sync = 1

        self.account1 = 'a'
        self.container1 = 'c'
        self.object1 = 'o1'
        self.name1 = '/' + '/'.join((
            self.account1, self.container1, self.object1))
        self.hash1 = utils.hash_path(
            self.account1, self.container1, self.object1)
        self.ts1 = '1372800001.00000'
        self.metadata1 = {
            'name': self.name1,
            'X-Timestamp': self.ts1,
            'Content-Length': '0'}

        self.account2 = 'a'
        self.container2 = 'c'
        self.object2 = 'o2'
        self.name2 = '/' + '/'.join((
            self.account2, self.container2, self.object2))
        self.hash2 = utils.hash_path(
            self.account2, self.container2, self.object2)
        self.ts2 = '1372800002.00000'
        self.metadata2 = {
            'name': self.name2,
            'X-Timestamp': self.ts2,
            'Content-Length': '0'}

    def tearDown(self):
        shutil.rmtree(os.path.dirname(self.testdir))

    def body_lines(self, body):
        lines = []
        for line in body.split(b'\n'):
            line = line.strip()
            if line:
                lines.append(line)
        return lines

    def test_SSYNC_semaphore_locked(self):
        with mock.patch.object(
                self.controller, 'replication_semaphore') as \
                mocked_replication_semaphore:
            self.controller.logger = mock.MagicMock()
            mocked_replication_semaphore.acquire.return_value = False
            req = swob.Request.blank(
                '/device/partition', environ={'REQUEST_METHOD': 'SSYNC'})
            resp = req.get_response(self.controller)
            if six.PY2:
                last_line = (
                    b":ERROR: 503 '<html><h1>Service Unavailable</h1><p>The "
                    b"server is currently unavailable. Please try again at a "
                    b"later time.</p></html>'")
            else:
                last_line = (
                    b":ERROR: 503 b'<html><h1>Service Unavailable</h1><p>The "
                    b"server is currently unavailable. Please try again at a "
                    b"later time.</p></html>'")
            self.assertEqual(
                self.body_lines(resp.body),
                [last_line])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.error.called)
            self.assertFalse(self.controller.logger.exception.called)

    def test_SSYNC_calls_replication_lock(self):
        with mock.patch.object(
                self.controller._diskfile_router[POLICIES.legacy],
                'replication_lock') as mocked_replication_lock:
            req = swob.Request.blank(
                '/sda1/1',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n'
                     ':MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n:UPDATES: END\r\n')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            mocked_replication_lock.assert_called_once_with('sda1',
                                                            POLICIES.legacy,
                                                            '1')

    def test_Receiver_with_default_storage_policy(self):
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        rcvr = ssync_receiver.Receiver(self.controller, req)
        body_lines = [chunk.strip() for chunk in rcvr() if chunk.strip()]
        self.assertEqual(
            body_lines,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(rcvr.policy, POLICIES[0])

    def test_Receiver_with_storage_policy_index_header(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '1'},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        rcvr = ssync_receiver.Receiver(self.controller, req)
        body_lines = [chunk.strip() for chunk in rcvr() if chunk.strip()]
        self.assertEqual(
            body_lines,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(rcvr.policy, POLICIES[1])
        self.assertIsNone(rcvr.frag_index)

    def test_Receiver_with_bad_storage_policy_index_header(self):
        valid_indices = sorted([int(policy) for policy in POLICIES])
        bad_index = valid_indices[-1] + 1
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '0',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': bad_index},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        self.controller.logger = mock.MagicMock()
        with self.assertRaises(HTTPException) as caught:
            ssync_receiver.Receiver(self.controller, req)
        self.assertEqual('503 Service Unavailable', caught.exception.status)
        self.assertEqual(b'No policy with index 2', caught.exception.body)

    @unit.patch_policies()
    def test_Receiver_with_only_frag_index_header(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '7',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '1'},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        rcvr = ssync_receiver.Receiver(self.controller, req)
        body_lines = [chunk.strip() for chunk in rcvr() if chunk.strip()]
        self.assertEqual(
            body_lines,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(rcvr.policy, POLICIES[1])
        self.assertEqual(rcvr.frag_index, 7)

    @unit.patch_policies()
    def test_Receiver_with_only_node_index_header(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_SSYNC_NODE_INDEX': '7',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '1'},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        rcvr = ssync_receiver.Receiver(self.controller, req)
        body_lines = [chunk.strip() for chunk in rcvr() if chunk.strip()]
        self.assertEqual(
            body_lines,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(rcvr.policy, POLICIES[1])
        # we used to require the reconstructor to send the frag_index twice as
        # two different headers because of evolutionary reasons, now we ignore
        # node_index
        self.assertEqual(rcvr.frag_index, None)

    @unit.patch_policies()
    def test_Receiver_with_matched_indexes(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_SSYNC_NODE_INDEX': '7',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '7',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '1'},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        rcvr = ssync_receiver.Receiver(self.controller, req)
        body_lines = [chunk.strip() for chunk in rcvr() if chunk.strip()]
        self.assertEqual(
            body_lines,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(rcvr.policy, POLICIES[1])
        self.assertEqual(rcvr.frag_index, 7)

    @unit.patch_policies()
    def test_Receiver_with_invalid_indexes(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_SSYNC_NODE_INDEX': 'None',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': 'None',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '1'},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(resp.status_int, 400)

    @unit.patch_policies()
    def test_Receiver_with_mismatched_indexes(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_SSYNC_NODE_INDEX': '6',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '7',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '1'},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        rcvr = ssync_receiver.Receiver(self.controller, req)
        body_lines = [chunk.strip() for chunk in rcvr() if chunk.strip()]
        self.assertEqual(
            body_lines,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(rcvr.policy, POLICIES[1])
        # node_index if provided should always match frag_index; but if they
        # differ, frag_index takes precedence
        self.assertEqual(rcvr.frag_index, 7)

    def test_SSYNC_replication_lock_fail(self):
        def _mock(path, policy, partition):
            with exceptions.ReplicationLockTimeout(0.01, '/somewhere/' + path):
                eventlet.sleep(0.05)
        with mock.patch.object(
                self.controller._diskfile_router[POLICIES.legacy],
                'replication_lock', _mock):
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/sda1/1',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n'
                     ':MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n:UPDATES: END\r\n')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b":ERROR: 0 '0.01 seconds: /somewhere/sda1'"])
            self.controller.logger.debug.assert_called_once_with(
                'None/sda1/1 SSYNC LOCK TIMEOUT: 0.01 seconds: '
                '/somewhere/sda1')

    def test_SSYNC_replication_lock_per_partition(self):
        def _concurrent_ssync(path1, path2):
            env = {'REQUEST_METHOD': 'SSYNC'}
            body = ':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n' \
                   ':UPDATES: START\r\n:UPDATES: END\r\n'
            req1 = swob.Request.blank(path1, environ=env, body=body)
            req2 = swob.Request.blank(path2, environ=env, body=body)

            rcvr1 = ssync_receiver.Receiver(self.controller, req1)
            rcvr2 = ssync_receiver.Receiver(self.controller, req2)

            body_lines1 = []
            body_lines2 = []

            for chunk1, chunk2 in six.moves.zip_longest(rcvr1(), rcvr2()):
                if chunk1 and chunk1.strip():
                    body_lines1.append(chunk1.strip())
                if chunk2 and chunk2.strip():
                    body_lines2.append(chunk2.strip())

            return body_lines1, body_lines2

        self.controller._diskfile_router[POLICIES[0]]\
            .replication_lock_timeout = 0.01
        self.controller._diskfile_router[POLICIES[0]]\
            .replication_concurrency_per_device = 2
        # It should be possible to lock two different partitions
        body_lines1, body_lines2 = _concurrent_ssync('/sda1/1', '/sda1/2')
        self.assertEqual(
            body_lines1,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(
            body_lines2,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])

        # It should not be possible to lock the same partition twice
        body_lines1, body_lines2 = _concurrent_ssync('/sda1/1', '/sda1/1')
        self.assertEqual(
            body_lines1,
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertRegex(
            b''.join(body_lines2),
            br"^:ERROR: 0 '0\.0[0-9]+ seconds: "
            br"/.+/sda1/objects/1/.lock-replication'$")

    def test_SSYNC_initial_path(self):
        with mock.patch.object(
                self.controller, 'replication_semaphore') as \
                mocked_replication_semaphore:
            req = swob.Request.blank(
                '/device', environ={'REQUEST_METHOD': 'SSYNC'})
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b"Invalid path: /device"])
            self.assertEqual(resp.status_int, 400)
            self.assertFalse(mocked_replication_semaphore.acquire.called)
            self.assertFalse(mocked_replication_semaphore.release.called)

        with mock.patch.object(
                self.controller, 'replication_semaphore') as \
                mocked_replication_semaphore:
            req = swob.Request.blank(
                '/device/', environ={'REQUEST_METHOD': 'SSYNC'})
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b"Invalid path: /device/"])
            self.assertEqual(resp.status_int, 400)
            self.assertFalse(mocked_replication_semaphore.acquire.called)
            self.assertFalse(mocked_replication_semaphore.release.called)

        with mock.patch.object(
                self.controller, 'replication_semaphore') as \
                mocked_replication_semaphore:
            req = swob.Request.blank(
                '/device/partition', environ={'REQUEST_METHOD': 'SSYNC'})
            resp = req.get_response(self.controller)
            self.assertEqual(resp.body, b'\r\n')
            self.assertEqual(resp.status_int, 200)
            mocked_replication_semaphore.acquire.assert_called_once_with(0)
            mocked_replication_semaphore.release.assert_called_once_with()
            error_lines = self.logger.get_lines_for_level('error')
            self.assertEqual(['ssync client disconnected'], error_lines)

        with mock.patch.object(
                self.controller, 'replication_semaphore') as \
                mocked_replication_semaphore:
            req = swob.Request.blank(
                '/device/partition/junk',
                environ={'REQUEST_METHOD': 'SSYNC'})
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b"Invalid path: /device/partition/junk"])
            self.assertEqual(resp.status_int, 400)
            self.assertFalse(mocked_replication_semaphore.acquire.called)
            self.assertFalse(mocked_replication_semaphore.release.called)

    def test_SSYNC_mount_check_isdir(self):
        with mock.patch.object(self.controller, 'replication_semaphore'), \
                mock.patch.object(
                    self.controller._diskfile_router[POLICIES.legacy],
                    'mount_check', False), \
                mock_check_drive(isdir=True) as mocks:
            req = swob.Request.blank(
                '/device/partition', environ={'REQUEST_METHOD': 'SSYNC'})
            resp = req.get_response(self.controller)
            self.assertEqual(resp.body, b'\r\n')
            self.assertEqual(resp.status_int, 200)
            self.assertEqual([], mocks['ismount'].call_args_list)
            error_lines = self.logger.get_lines_for_level('error')
            self.assertEqual(['ssync client disconnected'], error_lines)

    def test_SSYNC_mount_check(self):
        with mock.patch.object(self.controller, 'replication_semaphore'), \
                mock.patch.object(
                    self.controller._diskfile_router[POLICIES.legacy],
                    'mount_check', True), \
                mock_check_drive(ismount=False) as mocks:
            req = swob.Request.blank(
                '/device/partition', environ={'REQUEST_METHOD': 'SSYNC'})
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b"<html><h1>Insufficient Storage</h1><p>There "
                 b"was not enough space to save the resource. Drive: "
                 b"device</p></html>"])
            self.assertEqual(resp.status_int, 507)
            self.assertEqual([mock.call(os.path.join(
                self.controller._diskfile_router[POLICIES.legacy].devices,
                'device'))], mocks['ismount'].call_args_list)

            mocks['ismount'].reset_mock()
            mocks['ismount'].return_value = True
            req = swob.Request.blank(
                '/device/partition', environ={'REQUEST_METHOD': 'SSYNC'})
            resp = req.get_response(self.controller)
            self.assertEqual(resp.body, b'\r\n')
            self.assertEqual(resp.status_int, 200)
            self.assertEqual([mock.call(os.path.join(
                self.controller._diskfile_router[POLICIES.legacy].devices,
                'device'))] * 2, mocks['ismount'].call_args_list)
            error_lines = self.logger.get_lines_for_level('error')
            self.assertEqual(['ssync client disconnected'], error_lines)

    def test_SSYNC_Exception(self):

        class _Wrapper(io.BytesIO):

            def __init__(self, value):
                io.BytesIO.__init__(self, value)
                self.mock_socket = mock.MagicMock()

            def get_socket(self):
                return self.mock_socket

        with mock.patch.object(
                ssync_receiver.eventlet.greenio, 'shutdown_safe') as \
                mock_shutdown_safe:
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\nBad content is here')
            req.remote_addr = '1.2.3.4'
            mock_wsgi_input = _Wrapper(req.body)
            req.environ['wsgi.input'] = mock_wsgi_input
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b":ERROR: 0 'Got no headers for Bad content is here'"])
            self.assertEqual(resp.status_int, 200)
            mock_shutdown_safe.assert_called_once_with(
                mock_wsgi_input.mock_socket)
            mock_wsgi_input.mock_socket.close.assert_called_once_with()
            self.controller.logger.exception.assert_called_once_with(
                '1.2.3.4/device/partition EXCEPTION in ssync.Receiver')

    def test_SSYNC_Exception_Exception(self):

        class _Wrapper(io.BytesIO):

            def __init__(self, value):
                io.BytesIO.__init__(self, value)
                self.mock_socket = mock.MagicMock()

            def get_socket(self):
                return self.mock_socket

        with mock.patch.object(
                ssync_receiver.eventlet.greenio, 'shutdown_safe') as \
                mock_shutdown_safe:
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\nBad content is here')
            req.remote_addr = mock.MagicMock()
            req.remote_addr.__str__ = mock.Mock(
                side_effect=Exception("can't stringify this"))
            mock_wsgi_input = _Wrapper(req.body)
            req.environ['wsgi.input'] = mock_wsgi_input
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END'])
            self.assertEqual(resp.status_int, 200)
            mock_shutdown_safe.assert_called_once_with(
                mock_wsgi_input.mock_socket)
            mock_wsgi_input.mock_socket.close.assert_called_once_with()
            self.controller.logger.exception.assert_called_once_with(
                'EXCEPTION in ssync.Receiver')

    def test_MISSING_CHECK_timeout(self):

        class _Wrapper(io.BytesIO):

            def __init__(self, value):
                io.BytesIO.__init__(self, value)
                self.mock_socket = mock.MagicMock()

            def readline(self, sizehint=-1):
                line = io.BytesIO.readline(self)
                if line.startswith(b'hash'):
                    eventlet.sleep(0.1)
                return line

            def get_socket(self):
                return self.mock_socket

        self.controller.client_timeout = 0.01
        with mock.patch.object(
                ssync_receiver.eventlet.greenio, 'shutdown_safe') as \
                mock_shutdown_safe:
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/sda1/1',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n'
                     'hash ts\r\n'
                     ':MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n:UPDATES: END\r\n')
            req.remote_addr = '2.3.4.5'
            mock_wsgi_input = _Wrapper(req.body)
            req.environ['wsgi.input'] = mock_wsgi_input
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b":ERROR: 408 '0.01 seconds: missing_check line'"])
            self.assertEqual(resp.status_int, 200)
            self.assertTrue(mock_shutdown_safe.called)
            self.controller.logger.error.assert_called_once_with(
                '2.3.4.5/sda1/1 TIMEOUT in ssync.Receiver: '
                '0.01 seconds: missing_check line')

    def test_MISSING_CHECK_other_exception(self):

        class _Wrapper(io.BytesIO):

            def __init__(self, value):
                io.BytesIO.__init__(self, value)
                self.mock_socket = mock.MagicMock()

            def readline(self, sizehint=-1):
                line = io.BytesIO.readline(self)
                if line.startswith(b'hash'):
                    raise Exception('test exception')
                return line

            def get_socket(self):
                return self.mock_socket

        self.controller.client_timeout = 0.01
        with mock.patch.object(
                ssync_receiver.eventlet.greenio, 'shutdown_safe') as \
                mock_shutdown_safe:
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/sda1/1',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n'
                     'hash ts\r\n'
                     ':MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n:UPDATES: END\r\n')
            req.remote_addr = '3.4.5.6'
            mock_wsgi_input = _Wrapper(req.body)
            req.environ['wsgi.input'] = mock_wsgi_input
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b":ERROR: 0 'test exception'"])
            self.assertEqual(resp.status_int, 200)
            self.assertTrue(mock_shutdown_safe.called)
            self.controller.logger.exception.assert_called_once_with(
                '3.4.5.6/sda1/1 EXCEPTION in ssync.Receiver')

    def test_MISSING_CHECK_empty_list(self):

        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_MISSING_CHECK_have_none(self):

        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + self.ts1 + '\r\n' +
                 self.hash2 + ' ' + self.ts2 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash1 + ' dm').encode('ascii'),
             (self.hash2 + ' dm').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_MISSING_CHECK_extra_line_parts(self):
        # check that rx tolerates extra parts in missing check lines to
        # allow for protocol upgrades
        extra_1 = 'extra'
        extra_2 = 'multiple extra parts'
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + self.ts1 + ' ' + extra_1 + '\r\n' +
                 self.hash2 + ' ' + self.ts2 + ' ' + extra_2 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash1 + ' dm').encode('ascii'),
             (self.hash2 + ' dm').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_MISSING_CHECK_have_one_exact(self):
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        fp = open(os.path.join(object_dir, self.ts1 + '.data'), 'w+')
        fp.write('1')
        fp.flush()
        self.metadata1['Content-Length'] = '1'
        diskfile.write_metadata(fp, self.metadata1)

        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + self.ts1 + '\r\n' +
                 self.hash2 + ' ' + self.ts2 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash2 + ' dm').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_MISSING_CHECK_missing_meta_expired_data(self):
        # verify that even when rx disk file has expired x-delete-at, it will
        # still be opened and checked for missing meta
        self.controller.logger = mock.MagicMock()
        ts1 = next(make_timestamp_iter())
        df = self.controller.get_diskfile(
            'sda1', '1', self.account1, self.container1, self.object1,
            POLICIES[0])
        write_diskfile(df, ts1, extra_metadata={'X-Delete-At': 0})

        # make a request - expect newer metadata to be wanted
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + ts1.internal + ' m:30d40\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             b'c2519f265f9633e74f9b2fe3b9bec27d m',
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    @patch_policies(with_ec_default=True)
    def test_MISSING_CHECK_missing_durable(self):
        # check that local non-durable frag is made durable if remote sends
        # same ts for same frag, but only if remote is durable
        self.controller.logger = mock.MagicMock()
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)

        # make rx disk file but don't commit it, so durable state is missing
        ts1 = next(make_timestamp_iter()).internal
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        fp = open(os.path.join(object_dir, ts1 + '#2.data'), 'w+')
        fp.write('1')
        fp.flush()
        metadata1 = {
            'name': self.name1,
            'X-Timestamp': ts1,
            'Content-Length': '1'}
        diskfile.write_metadata(fp, metadata1)
        self.assertEqual([ts1 + '#2.data'], os.listdir(object_dir))  # sanity

        # offer same non-durable frag - expect no data to be wanted
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '2'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + ts1 + ' durable:no\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)
        # the local  frag is still not durable...
        self.assertEqual([ts1 + '#2.data'], os.listdir(object_dir))

        # offer same frag but durable - expect no data to be wanted
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '2'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + ts1 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)
        # the local frag is now durable...
        self.assertEqual([ts1 + '#2#d.data'], os.listdir(object_dir))

    @patch_policies(with_ec_default=True)
    @mock.patch('swift.obj.diskfile.ECDiskFileWriter.commit')
    def test_MISSING_CHECK_missing_durable_but_commit_fails(self, mock_commit):
        self.controller.logger = mock.MagicMock()
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)

        # make rx disk file but don't commit it, so durable state is missing
        ts1 = next(make_timestamp_iter()).internal
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        fp = open(os.path.join(object_dir, ts1 + '#2.data'), 'w+')
        fp.write('1')
        fp.flush()
        metadata1 = {
            'name': self.name1,
            'X-Timestamp': ts1,
            'Content-Length': '1'}
        diskfile.write_metadata(fp, metadata1)
        self.assertEqual([ts1 + '#2.data'], os.listdir(object_dir))  # sanity

        # make a request with commit disabled - expect data to be wanted
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '2'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + ts1 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash1 + ' dm').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

        # make a request with commit raising error - expect data to be wanted
        mock_commit.side_effect = Exception
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '2'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + ts1 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash1 + ' dm').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertTrue(self.controller.logger.exception.called)
        self.assertIn(
            'EXCEPTION in ssync.Receiver while attempting commit of',
            self.controller.logger.exception.call_args[0][0])

    @patch_policies(with_ec_default=True)
    def test_MISSING_CHECK_local_non_durable(self):
        # check that local non-durable fragment does not prevent other frags
        # being wanted from the sender
        self.controller.logger = mock.MagicMock()
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)

        ts_iter = make_timestamp_iter()
        ts1 = next(ts_iter).internal
        ts2 = next(ts_iter).internal
        ts3 = next(ts_iter).internal
        # make non-durable rx disk file at ts2
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        fp = open(os.path.join(object_dir, ts2 + '#2.data'), 'w+')
        fp.write('1')
        fp.flush()
        metadata1 = {
            'name': self.name1,
            'X-Timestamp': ts2,
            'Content-Length': '1'}
        diskfile.write_metadata(fp, metadata1)
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))  # sanity

        def do_check(tx_missing_line, expected_rx_missing_lines):
            req = swob.Request.blank(
                '/sda1/1',
                environ={'REQUEST_METHOD': 'SSYNC',
                         'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0',
                         'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '2'},
                body=':MISSING_CHECK: START\r\n' +
                     tx_missing_line + '\r\n'
                     ':MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n:UPDATES: END\r\n')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START'] +
                [l.encode('ascii') for l in expected_rx_missing_lines] +
                [b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.error.called)
            self.assertFalse(self.controller.logger.exception.called)

        # check remote frag is always wanted - older, newer, durable or not...
        do_check(self.hash1 + ' ' + ts1 + ' durable:no',
                 [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts1 + ' durable:yes',
                 [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts1, [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts3 + ' durable:no',
                 [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts3 + ' durable:yes',
                 [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts3, [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        # ... except when at same timestamp
        do_check(self.hash1 + ' ' + ts2 + ' durable:no', [])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        # durable remote frag at ts2 will make the local durable..
        do_check(self.hash1 + ' ' + ts2 + ' durable:yes', [])
        self.assertEqual([ts2 + '#2#d.data'], os.listdir(object_dir))

    @patch_policies(with_ec_default=True)
    def test_MISSING_CHECK_local_durable(self):
        # check that local durable fragment does not prevent newer non-durable
        # frags being wanted from the sender
        self.controller.logger = mock.MagicMock()
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)

        ts_iter = make_timestamp_iter()
        ts1 = next(ts_iter).internal
        ts2 = next(ts_iter).internal
        ts3 = next(ts_iter).internal
        # make non-durable rx disk file at ts2
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        fp = open(os.path.join(object_dir, ts2 + '#2.data'), 'w+')
        fp.write('1')
        fp.flush()
        metadata1 = {
            'name': self.name1,
            'X-Timestamp': ts2,
            'Content-Length': '1'}
        diskfile.write_metadata(fp, metadata1)
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))  # sanity

        def do_check(tx_missing_line, expected_rx_missing_lines):
            req = swob.Request.blank(
                '/sda1/1',
                environ={'REQUEST_METHOD': 'SSYNC',
                         'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0',
                         'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '2'},
                body=':MISSING_CHECK: START\r\n' +
                     tx_missing_line + '\r\n'
                     ':MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n:UPDATES: END\r\n')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START'] +
                [l.encode('ascii') for l in expected_rx_missing_lines] +
                [b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.error.called)
            self.assertFalse(self.controller.logger.exception.called)

        # check remote frag is always wanted - older, newer, durable or not...
        do_check(self.hash1 + ' ' + ts1 + ' durable:no',
                 [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts1 + ' durable:yes',
                 [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts1, [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts3 + ' durable:no',
                 [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts3 + ' durable:yes',
                 [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        do_check(self.hash1 + ' ' + ts3, [self.hash1 + ' dm'])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        # ... except when at same timestamp
        do_check(self.hash1 + ' ' + ts2 + ' durable:no', [])
        self.assertEqual([ts2 + '#2.data'], os.listdir(object_dir))
        # durable remote frag at ts2 will make the local durable..
        do_check(self.hash1 + ' ' + ts2 + ' durable:yes', [])
        self.assertEqual([ts2 + '#2#d.data'], os.listdir(object_dir))

    @patch_policies(with_ec_default=True)
    def test_MISSING_CHECK_local_durable_older_than_remote_non_durable(self):
        # check that newer non-durable fragment is wanted
        self.controller.logger = mock.MagicMock()
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)

        ts_iter = make_timestamp_iter()
        ts1 = next(ts_iter).internal
        ts2 = next(ts_iter).internal
        # make durable rx disk file at ts2
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        fp = open(os.path.join(object_dir, ts1 + '#2#d.data'), 'w+')
        fp.write('1')
        fp.flush()
        metadata1 = {
            'name': self.name1,
            'X-Timestamp': ts1,
            'Content-Length': '1'}
        diskfile.write_metadata(fp, metadata1)

        # make a request offering non-durable at ts2
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0',
                     'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '2'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + ts2 + ' durable:no\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash1 + ' dm').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_MISSING_CHECK_storage_policy(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[1])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        fp = open(os.path.join(object_dir, self.ts1 + '.data'), 'w+')
        fp.write('1')
        fp.flush()
        self.metadata1['Content-Length'] = '1'
        diskfile.write_metadata(fp, self.metadata1)

        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC',
                     'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '1'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + self.ts1 + '\r\n' +
                 self.hash2 + ' ' + self.ts2 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash2 + ' dm').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_MISSING_CHECK_have_one_newer(self):
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        newer_ts1 = utils.normalize_timestamp(float(self.ts1) + 1)
        self.metadata1['X-Timestamp'] = newer_ts1
        fp = open(os.path.join(object_dir, newer_ts1 + '.data'), 'w+')
        fp.write('1')
        fp.flush()
        self.metadata1['Content-Length'] = '1'
        diskfile.write_metadata(fp, self.metadata1)

        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + self.ts1 + '\r\n' +
                 self.hash2 + ' ' + self.ts2 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash2 + ' dm').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_MISSING_CHECK_have_newer_meta(self):
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        older_ts1 = utils.normalize_timestamp(float(self.ts1) - 1)
        self.metadata1['X-Timestamp'] = older_ts1
        fp = open(os.path.join(object_dir, older_ts1 + '.data'), 'w+')
        fp.write('1')
        fp.flush()
        self.metadata1['Content-Length'] = '1'
        diskfile.write_metadata(fp, self.metadata1)
        # write newer .meta file
        metadata = {'name': self.name1, 'X-Timestamp': self.ts2,
                    'X-Object-Meta-Test': 'test'}
        fp = open(os.path.join(object_dir, self.ts2 + '.meta'), 'w+')
        diskfile.write_metadata(fp, metadata)

        # receiver has .data at older_ts, .meta at ts2
        # sender has .data at ts1
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + self.ts1 + '\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash1 + ' d').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_MISSING_CHECK_have_older_meta(self):
        object_dir = utils.storage_directory(
            os.path.join(self.testdir, 'sda1',
                         diskfile.get_data_dir(POLICIES[0])),
            '1', self.hash1)
        utils.mkdirs(object_dir)
        older_ts1 = utils.normalize_timestamp(float(self.ts1) - 1)
        self.metadata1['X-Timestamp'] = older_ts1
        fp = open(os.path.join(object_dir, older_ts1 + '.data'), 'w+')
        fp.write('1')
        fp.flush()
        self.metadata1['Content-Length'] = '1'
        diskfile.write_metadata(fp, self.metadata1)
        # write .meta file at ts1
        metadata = {'name': self.name1, 'X-Timestamp': self.ts1,
                    'X-Object-Meta-Test': 'test'}
        fp = open(os.path.join(object_dir, self.ts1 + '.meta'), 'w+')
        diskfile.write_metadata(fp, metadata)

        # receiver has .data at older_ts, .meta at ts1
        # sender has .data at older_ts, .meta at ts2
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/sda1/1',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n' +
                 self.hash1 + ' ' + older_ts1 + ' m:30d40\r\n'
                 ':MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n:UPDATES: END\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START',
             (self.hash1 + ' m').encode('ascii'),
             b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.error.called)
        self.assertFalse(self.controller.logger.exception.called)

    def test_UPDATES_no_start(self):
        # verify behavior when the sender disconnects and does not send
        # ':UPDATES: START' e.g. if a sender timeout pops while waiting for
        # receiver response to missing checks
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n')
        req.remote_addr = '2.3.4.5'
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END'])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.error.assert_called_once_with(
            'ssync client disconnected')

    def test_UPDATES_timeout(self):

        class _Wrapper(io.BytesIO):

            def __init__(self, value):
                io.BytesIO.__init__(self, value)
                self.mock_socket = mock.MagicMock()

            def readline(self, sizehint=-1):
                line = io.BytesIO.readline(self)
                if line.startswith(b'DELETE'):
                    eventlet.sleep(0.1)
                return line

            def get_socket(self):
                return self.mock_socket

        self.controller.client_timeout = 0.01
        with mock.patch.object(
                ssync_receiver.eventlet.greenio, 'shutdown_safe') as \
                mock_shutdown_safe:
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n'
                     'X-Timestamp: 1364456113.76334\r\n'
                     '\r\n'
                     ':UPDATES: END\r\n')
            req.remote_addr = '2.3.4.5'
            mock_wsgi_input = _Wrapper(req.body)
            req.environ['wsgi.input'] = mock_wsgi_input
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b":ERROR: 408 '0.01 seconds: updates line'"])
            self.assertEqual(resp.status_int, 200)
            mock_shutdown_safe.assert_called_once_with(
                mock_wsgi_input.mock_socket)
            mock_wsgi_input.mock_socket.close.assert_called_once_with()
            self.controller.logger.error.assert_called_once_with(
                '2.3.4.5/device/partition TIMEOUT in ssync.Receiver: '
                '0.01 seconds: updates line')

    def test_UPDATES_other_exception(self):

        class _Wrapper(io.BytesIO):

            def __init__(self, value):
                io.BytesIO.__init__(self, value)
                self.mock_socket = mock.MagicMock()

            def readline(self, sizehint=-1):
                line = io.BytesIO.readline(self)
                if line.startswith(b'DELETE'):
                    raise Exception('test exception')
                return line

            def get_socket(self):
                return self.mock_socket

        self.controller.client_timeout = 0.01
        with mock.patch.object(
                ssync_receiver.eventlet.greenio, 'shutdown_safe') as \
                mock_shutdown_safe:
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n'
                     'X-Timestamp: 1364456113.76334\r\n'
                     '\r\n'
                     ':UPDATES: END\r\n')
            req.remote_addr = '3.4.5.6'
            mock_wsgi_input = _Wrapper(req.body)
            req.environ['wsgi.input'] = mock_wsgi_input
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b":ERROR: 0 'test exception'"])
            self.assertEqual(resp.status_int, 200)
            mock_shutdown_safe.assert_called_once_with(
                mock_wsgi_input.mock_socket)
            mock_wsgi_input.mock_socket.close.assert_called_once_with()
            self.controller.logger.exception.assert_called_once_with(
                '3.4.5.6/device/partition EXCEPTION in ssync.Receiver')

    def test_UPDATES_no_problems_no_hard_disconnect(self):

        class _Wrapper(io.BytesIO):

            def __init__(self, value):
                io.BytesIO.__init__(self, value)
                self.mock_socket = mock.MagicMock()

            def get_socket(self):
                return self.mock_socket

        self.controller.client_timeout = 0.01
        with mock.patch.object(ssync_receiver.eventlet.greenio,
                               'shutdown_safe') as mock_shutdown_safe, \
                mock.patch.object(
                    self.controller, 'DELETE',
                    return_value=swob.HTTPNoContent()):
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n'
                     'X-Timestamp: 1364456113.76334\r\n'
                     '\r\n'
                     ':UPDATES: END\r\n')
            mock_wsgi_input = _Wrapper(req.body)
            req.environ['wsgi.input'] = mock_wsgi_input
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(mock_shutdown_safe.called)
            self.assertFalse(mock_wsgi_input.mock_socket.close.called)

    def test_UPDATES_bad_subrequest_line(self):
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'bad_subrequest_line\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             UNPACK_ERR])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.exception.assert_called_once_with(
            'None/device/partition EXCEPTION in ssync.Receiver')

        with mock.patch.object(
                self.controller, 'DELETE',
                return_value=swob.HTTPNoContent()):
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n'
                     'X-Timestamp: 1364456113.76334\r\n'
                     '\r\n'
                     'bad_subrequest_line2')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 UNPACK_ERR])
            self.assertEqual(resp.status_int, 200)
            self.controller.logger.exception.assert_called_once_with(
                'None/device/partition EXCEPTION in ssync.Receiver')

    def test_UPDATES_no_headers(self):
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'DELETE /a/c/o\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b":ERROR: 0 'Got no headers for DELETE /a/c/o'"])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.exception.assert_called_once_with(
            'None/device/partition EXCEPTION in ssync.Receiver')

    def test_UPDATES_bad_headers(self):
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'DELETE /a/c/o\r\n'
                 'Bad-Header Test\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             UNPACK_ERR])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.exception.assert_called_once_with(
            'None/device/partition EXCEPTION in ssync.Receiver')

        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'DELETE /a/c/o\r\n'
                 'Good-Header: Test\r\n'
                 'Bad-Header Test\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             UNPACK_ERR])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.exception.assert_called_once_with(
            'None/device/partition EXCEPTION in ssync.Receiver')

    def test_UPDATES_bad_content_length(self):
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'PUT /a/c/o\r\n'
                 'Content-Length: a\r\n\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':ERROR: 0 "invalid literal for int() with base 10: \'a\'"'])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.exception.assert_called_once_with(
            'None/device/partition EXCEPTION in ssync.Receiver')

    def test_UPDATES_content_length_with_DELETE(self):
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'DELETE /a/c/o\r\n'
                 'Content-Length: 1\r\n\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b":ERROR: 0 'DELETE subrequest with content-length /a/c/o'"])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.exception.assert_called_once_with(
            'None/device/partition EXCEPTION in ssync.Receiver')

    def test_UPDATES_no_content_length_with_PUT(self):
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'PUT /a/c/o\r\n\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b":ERROR: 0 'No content-length sent for PUT /a/c/o'"])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.exception.assert_called_once_with(
            'None/device/partition EXCEPTION in ssync.Receiver')

    def test_UPDATES_early_termination(self):
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'PUT /a/c/o\r\n'
                 'Content-Length: 1\r\n\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END'])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.error.assert_called_once_with(
            'None/device/partition read failed in ssync.Receiver: '
            'Early termination for PUT /a/c/o')

    def test_UPDATES_failures(self):

        @server.public
        def _DELETE(request):
            if request.path == '/device/partition/a/c/works':
                return swob.HTTPNoContent()
            else:
                return swob.HTTPInternalServerError()

        # failures never hit threshold
        with mock.patch.object(self.controller, 'DELETE', _DELETE):
            self.controller.replication_failure_threshold = 4
            self.controller.replication_failure_ratio = 1.5
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n')
            resp = req.get_response(self.controller)
            if six.PY2:
                final_line = (b":ERROR: 500 'ERROR: With :UPDATES: "
                              b"3 failures to 0 successes'")
            else:
                final_line = (b":ERROR: 500 b'ERROR: With :UPDATES: "
                              b"3 failures to 0 successes'")
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END', final_line])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.exception.called)
            self.assertFalse(self.controller.logger.error.called)
            self.assertTrue(self.controller.logger.warning.called)
            self.assertEqual(3, self.controller.logger.warning.call_count)
            self.controller.logger.clear()

        # failures hit threshold and no successes, so ratio is like infinity
        with mock.patch.object(self.controller, 'DELETE', _DELETE):
            self.controller.replication_failure_threshold = 4
            self.controller.replication_failure_ratio = 1.5
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     ':UPDATES: END\r\n')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b":ERROR: 0 'Too many 4 failures to 0 successes'"])
            self.assertEqual(resp.status_int, 200)
            self.controller.logger.exception.assert_called_once_with(
                'None/device/partition EXCEPTION in ssync.Receiver')
            self.assertFalse(self.controller.logger.error.called)
            self.assertTrue(self.controller.logger.warning.called)
            self.assertEqual(4, self.controller.logger.warning.call_count)
            self.controller.logger.clear()

        # failures hit threshold and ratio hits 1.33333333333
        with mock.patch.object(self.controller, 'DELETE', _DELETE):
            self.controller.replication_failure_threshold = 4
            self.controller.replication_failure_ratio = 1.5
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/works\r\n\r\n'
                     'DELETE /a/c/works\r\n\r\n'
                     'DELETE /a/c/works\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     ':UPDATES: END\r\n')
            resp = req.get_response(self.controller)
            if six.PY2:
                final_line = (b":ERROR: 500 'ERROR: With :UPDATES: "
                              b"4 failures to 3 successes'")
            else:
                final_line = (b":ERROR: 500 b'ERROR: With :UPDATES: "
                              b"4 failures to 3 successes'")
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 final_line])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.exception.called)
            self.assertFalse(self.controller.logger.error.called)
            self.assertTrue(self.controller.logger.warning.called)
            self.assertEqual(4, self.controller.logger.warning.call_count)
            self.controller.logger.clear()

        # failures hit threshold and ratio hits 2.0
        with mock.patch.object(self.controller, 'DELETE', _DELETE):
            self.controller.replication_failure_threshold = 4
            self.controller.replication_failure_ratio = 1.5
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/works\r\n\r\n'
                     'DELETE /a/c/works\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     'DELETE /a/c/o\r\n\r\n'
                     ':UPDATES: END\r\n')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b":ERROR: 0 'Too many 4 failures to 2 successes'"])
            self.assertEqual(resp.status_int, 200)
            self.controller.logger.exception.assert_called_once_with(
                'None/device/partition EXCEPTION in ssync.Receiver')
            self.assertFalse(self.controller.logger.error.called)
            self.assertTrue(self.controller.logger.warning.called)
            self.assertEqual(4, self.controller.logger.warning.call_count)
            self.controller.logger.clear()

    def test_UPDATES_PUT(self):
        _PUT_request = [None]

        @server.public
        def _PUT(request):
            _PUT_request[0] = request
            request.read_body = request.environ['wsgi.input'].read()
            return swob.HTTPCreated()

        with mock.patch.object(self.controller, 'PUT', _PUT):
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'PUT /a/c/o\r\n'
                     'Content-Length: 1\r\n'
                     'Etag: c4ca4238a0b923820dcc509a6f75849b\r\n'
                     'X-Timestamp: 1364456113.12344\r\n'
                     'X-Object-Meta-Test1: one\r\n'
                     'Content-Encoding: gzip\r\n'
                     'Specialty-Header: value\r\n'
                     'X-Backend-No-Commit: True\r\n'
                     '\r\n'
                     '1')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.exception.called)
            self.assertFalse(self.controller.logger.error.called)
            self.assertEqual(len(_PUT_request), 1)  # sanity
            req = _PUT_request[0]
            self.assertEqual(req.path, '/device/partition/a/c/o')
            self.assertEqual(req.content_length, 1)
            self.assertEqual(req.headers, {
                'Etag': 'c4ca4238a0b923820dcc509a6f75849b',
                'Content-Length': '1',
                'X-Timestamp': '1364456113.12344',
                'X-Object-Meta-Test1': 'one',
                'Content-Encoding': 'gzip',
                'Specialty-Header': 'value',
                'X-Backend-No-Commit': 'True',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                # note: Etag and X-Backend-No-Commit not in replication-headers
                'X-Backend-Replication-Headers': (
                    'content-length x-timestamp x-object-meta-test1 '
                    'content-encoding specialty-header')})

    def test_UPDATES_PUT_replication_headers(self):
        self.controller.logger = mock.MagicMock()

        # sanity check - regular PUT will not persist Specialty-Header or
        # X-Backend-No-Commit
        req = swob.Request.blank(
            '/sda1/0/a/c/o1', body='1',
            environ={'REQUEST_METHOD': 'PUT'},
            headers={'Content-Length': '1',
                     'Content-Type': 'text/plain',
                     'Etag': 'c4ca4238a0b923820dcc509a6f75849b',
                     'X-Timestamp': '1364456113.12344',
                     'X-Object-Meta-Test1': 'one',
                     'Content-Encoding': 'gzip',
                     'X-Backend-No-Commit': 'False',
                     'Specialty-Header': 'value'})
        resp = req.get_response(self.controller)
        self.assertEqual(resp.status_int, 201)
        df = self.controller.get_diskfile(
            'sda1', '0', 'a', 'c', 'o1', POLICIES.default)
        df.open()
        self.assertFalse('Specialty-Header' in df.get_metadata())
        self.assertFalse('X-Backend-No-Commit' in df.get_metadata())

        # an SSYNC request can override PUT header filtering...
        req = swob.Request.blank(
            '/sda1/0',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'PUT /a/c/o2\r\n'
                 'Content-Length: 1\r\n'
                 'Content-Type: text/plain\r\n'
                 'Etag: c4ca4238a0b923820dcc509a6f75849b\r\n'
                 'X-Timestamp: 1364456113.12344\r\n'
                 'X-Object-Meta-Test1: one\r\n'
                 'Content-Encoding: gzip\r\n'
                 'X-Backend-No-Commit: False\r\n'
                 'Specialty-Header: value\r\n'
                 '\r\n'
                 '1')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b':UPDATES: START', b':UPDATES: END'])
        self.assertEqual(resp.status_int, 200)

        # verify diskfile has metadata permitted by replication headers
        # including Specialty-Header, but not Etag or X-Backend-No-Commit
        df = self.controller.get_diskfile(
            'sda1', '0', 'a', 'c', 'o2', POLICIES.default)
        df.open()
        for chunk in df.reader():
            self.assertEqual(b'1', chunk)
        expected = {'ETag': 'c4ca4238a0b923820dcc509a6f75849b',
                    'Content-Length': '1',
                    'Content-Type': 'text/plain',
                    'X-Timestamp': '1364456113.12344',
                    'X-Object-Meta-Test1': 'one',
                    'Content-Encoding': 'gzip',
                    'Specialty-Header': 'value',
                    'name': '/a/c/o2'}
        actual = df.get_metadata()
        self.assertEqual(expected, actual)

    def test_UPDATES_POST(self):
        _POST_request = [None]

        @server.public
        def _POST(request):
            _POST_request[0] = request
            return swob.HTTPAccepted()

        with mock.patch.object(self.controller, 'POST', _POST):
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'POST /a/c/o\r\n'
                     'X-Timestamp: 1364456113.12344\r\n'
                     'X-Object-Meta-Test1: one\r\n'
                     'Specialty-Header: value\r\n\r\n')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.exception.called)
            self.assertFalse(self.controller.logger.error.called)
            req = _POST_request[0]
            self.assertEqual(req.path, '/device/partition/a/c/o')
            self.assertIsNone(req.content_length)
            self.assertEqual(req.headers, {
                'X-Timestamp': '1364456113.12344',
                'X-Object-Meta-Test1': 'one',
                'Specialty-Header': 'value',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': (
                    'x-timestamp x-object-meta-test1 specialty-header')})

    def test_UPDATES_with_storage_policy(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)
        _PUT_request = [None]

        @server.public
        def _PUT(request):
            _PUT_request[0] = request
            request.read_body = request.environ['wsgi.input'].read()
            return swob.HTTPCreated()

        with mock.patch.object(self.controller, 'PUT', _PUT):
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC',
                         'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '1'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'PUT /a/c/o\r\n'
                     'Content-Length: 1\r\n'
                     'X-Timestamp: 1364456113.12344\r\n'
                     'X-Object-Meta-Test1: one\r\n'
                     'Content-Encoding: gzip\r\n'
                     'Specialty-Header: value\r\n'
                     '\r\n'
                     '1')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.exception.called)
            self.assertFalse(self.controller.logger.error.called)
            self.assertEqual(len(_PUT_request), 1)  # sanity
            req = _PUT_request[0]
            self.assertEqual(req.path, '/device/partition/a/c/o')
            self.assertEqual(req.content_length, 1)
            self.assertEqual(req.headers, {
                'Content-Length': '1',
                'X-Timestamp': '1364456113.12344',
                'X-Object-Meta-Test1': 'one',
                'Content-Encoding': 'gzip',
                'Specialty-Header': 'value',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '1',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': (
                    'content-length x-timestamp x-object-meta-test1 '
                    'content-encoding specialty-header')})
            self.assertEqual(req.read_body, b'1')

    def test_UPDATES_PUT_with_storage_policy_and_node_index(self):
        # update router post policy patch
        self.controller._diskfile_router = diskfile.DiskFileRouter(
            self.conf, self.controller.logger)

        _PUT_request = [None]

        @server.public
        def _PUT(request):
            _PUT_request[0] = request
            request.read_body = request.environ['wsgi.input'].read()
            return swob.HTTPCreated()

        with mock.patch.object(self.controller, 'PUT', _PUT):
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC',
                         'HTTP_X_BACKEND_SSYNC_NODE_INDEX': '7',
                         'HTTP_X_BACKEND_SSYNC_FRAG_INDEX': '7',
                         'HTTP_X_BACKEND_STORAGE_POLICY_INDEX': '0'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'PUT /a/c/o\r\n'
                     'Content-Length: 1\r\n'
                     'X-Timestamp: 1364456113.12344\r\n'
                     'X-Object-Meta-Test1: one\r\n'
                     'Content-Encoding: gzip\r\n'
                     'Specialty-Header: value\r\n'
                     '\r\n'
                     '1')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.exception.called)
            self.assertFalse(self.controller.logger.error.called)
            self.assertEqual(len(_PUT_request), 1)  # sanity
            req = _PUT_request[0]
            self.assertEqual(req.path, '/device/partition/a/c/o')
            self.assertEqual(req.content_length, 1)
            self.assertEqual(req.headers, {
                'Content-Length': '1',
                'X-Timestamp': '1364456113.12344',
                'X-Object-Meta-Test1': 'one',
                'Content-Encoding': 'gzip',
                'Specialty-Header': 'value',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Ssync-Frag-Index': '7',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': (
                    'content-length x-timestamp x-object-meta-test1 '
                    'content-encoding specialty-header')})
            self.assertEqual(req.read_body, b'1')

    def test_UPDATES_DELETE(self):
        _DELETE_request = [None]

        @server.public
        def _DELETE(request):
            _DELETE_request[0] = request
            return swob.HTTPNoContent()

        with mock.patch.object(self.controller, 'DELETE', _DELETE):
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'DELETE /a/c/o\r\n'
                     'X-Timestamp: 1364456113.76334\r\n'
                     '\r\n')
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.exception.called)
            self.assertFalse(self.controller.logger.error.called)
            self.assertEqual(len(_DELETE_request), 1)  # sanity
            req = _DELETE_request[0]
            self.assertEqual(req.path, '/device/partition/a/c/o')
            self.assertEqual(req.headers, {
                'X-Timestamp': '1364456113.76334',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': 'x-timestamp'})

    def test_UPDATES_BONK(self):
        _BONK_request = [None]

        @server.public
        def _BONK(request):
            _BONK_request[0] = request
            return swob.HTTPOk()

        self.controller.BONK = _BONK
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'BONK /a/c/o\r\n'
                 'X-Timestamp: 1364456113.76334\r\n'
                 '\r\n')
        resp = req.get_response(self.controller)
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
             b":ERROR: 0 'Invalid subrequest method BONK'"])
        self.assertEqual(resp.status_int, 200)
        self.controller.logger.exception.assert_called_once_with(
            'None/device/partition EXCEPTION in ssync.Receiver')
        self.assertEqual(len(_BONK_request), 1)  # sanity
        self.assertIsNone(_BONK_request[0])

    def test_UPDATES_multiple(self):
        _requests = []

        @server.public
        def _PUT(request):
            _requests.append(request)
            request.read_body = request.environ['wsgi.input'].read()
            return swob.HTTPCreated()

        @server.public
        def _POST(request):
            _requests.append(request)
            return swob.HTTPOk()

        @server.public
        def _DELETE(request):
            _requests.append(request)
            return swob.HTTPNoContent()

        with mock.patch.object(self.controller, 'PUT', _PUT), \
                mock.patch.object(self.controller, 'POST', _POST), \
                mock.patch.object(self.controller, 'DELETE', _DELETE):
            self.controller.logger = mock.MagicMock()
            req = swob.Request.blank(
                '/device/partition',
                environ={'REQUEST_METHOD': 'SSYNC'},
                body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                     ':UPDATES: START\r\n'
                     'PUT /a/c/o1\r\n'
                     'Content-Length: 1\r\n'
                     'X-Timestamp: 1364456113.00001\r\n'
                     'X-Object-Meta-Test1: one\r\n'
                     'Content-Encoding: gzip\r\n'
                     'Specialty-Header: value\r\n'
                     '\r\n'
                     '1'
                     'DELETE /a/c/o2\r\n'
                     'X-Timestamp: 1364456113.00002\r\n'
                     '\r\n'
                     'PUT /a/c/o3\r\n'
                     'Content-Length: 3\r\n'
                     'X-Timestamp: 1364456113.00003\r\n'
                     '\r\n'
                     '123'
                     'PUT /a/c/o4\r\n'
                     'Content-Length: 4\r\n'
                     'X-Timestamp: 1364456113.00004\r\n'
                     '\r\n'
                     '1\r\n4'
                     'DELETE /a/c/o5\r\n'
                     'X-Timestamp: 1364456113.00005\r\n'
                     '\r\n'
                     'DELETE /a/c/o6\r\n'
                     'X-Timestamp: 1364456113.00006\r\n'
                     '\r\n'
                     'PUT /a/c/o7\r\n'
                     'Content-Length: 7\r\n'
                     'X-Timestamp: 1364456113.00007\r\n'
                     '\r\n'
                     '1234567'
                     'POST /a/c/o7\r\n'
                     'X-Object-Meta-Test-User: user_meta\r\n'
                     'X-Timestamp: 1364456113.00008\r\n'
                     '\r\n'
            )
            resp = req.get_response(self.controller)
            self.assertEqual(
                self.body_lines(resp.body),
                [b':MISSING_CHECK: START', b':MISSING_CHECK: END',
                 b':UPDATES: START', b':UPDATES: END'])
            self.assertEqual(resp.status_int, 200)
            self.assertFalse(self.controller.logger.exception.called)
            self.assertFalse(self.controller.logger.error.called)
            self.assertEqual(len(_requests), 8)  # sanity
            req = _requests.pop(0)
            self.assertEqual(req.method, 'PUT')
            self.assertEqual(req.path, '/device/partition/a/c/o1')
            self.assertEqual(req.content_length, 1)
            self.assertEqual(req.headers, {
                'Content-Length': '1',
                'X-Timestamp': '1364456113.00001',
                'X-Object-Meta-Test1': 'one',
                'Content-Encoding': 'gzip',
                'Specialty-Header': 'value',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': (
                    'content-length x-timestamp x-object-meta-test1 '
                    'content-encoding specialty-header')})
            self.assertEqual(req.read_body, b'1')
            req = _requests.pop(0)
            self.assertEqual(req.method, 'DELETE')
            self.assertEqual(req.path, '/device/partition/a/c/o2')
            self.assertEqual(req.headers, {
                'X-Timestamp': '1364456113.00002',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': 'x-timestamp'})
            req = _requests.pop(0)
            self.assertEqual(req.method, 'PUT')
            self.assertEqual(req.path, '/device/partition/a/c/o3')
            self.assertEqual(req.content_length, 3)
            self.assertEqual(req.headers, {
                'Content-Length': '3',
                'X-Timestamp': '1364456113.00003',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': (
                    'content-length x-timestamp')})
            self.assertEqual(req.read_body, b'123')
            req = _requests.pop(0)
            self.assertEqual(req.method, 'PUT')
            self.assertEqual(req.path, '/device/partition/a/c/o4')
            self.assertEqual(req.content_length, 4)
            self.assertEqual(req.headers, {
                'Content-Length': '4',
                'X-Timestamp': '1364456113.00004',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': (
                    'content-length x-timestamp')})
            self.assertEqual(req.read_body, b'1\r\n4')
            req = _requests.pop(0)
            self.assertEqual(req.method, 'DELETE')
            self.assertEqual(req.path, '/device/partition/a/c/o5')
            self.assertEqual(req.headers, {
                'X-Timestamp': '1364456113.00005',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': 'x-timestamp'})
            req = _requests.pop(0)
            self.assertEqual(req.method, 'DELETE')
            self.assertEqual(req.path, '/device/partition/a/c/o6')
            self.assertEqual(req.headers, {
                'X-Timestamp': '1364456113.00006',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': 'x-timestamp'})
            req = _requests.pop(0)
            self.assertEqual(req.method, 'PUT')
            self.assertEqual(req.path, '/device/partition/a/c/o7')
            self.assertEqual(req.content_length, 7)
            self.assertEqual(req.headers, {
                'Content-Length': '7',
                'X-Timestamp': '1364456113.00007',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': (
                    'content-length x-timestamp')})
            self.assertEqual(req.read_body, b'1234567')
            req = _requests.pop(0)
            self.assertEqual(req.method, 'POST')
            self.assertEqual(req.path, '/device/partition/a/c/o7')
            self.assertIsNone(req.content_length)
            self.assertEqual(req.headers, {
                'X-Timestamp': '1364456113.00008',
                'X-Object-Meta-Test-User': 'user_meta',
                'Host': 'localhost:80',
                'X-Backend-Storage-Policy-Index': '0',
                'X-Backend-Replication': 'True',
                'X-Backend-Replication-Headers': (
                    'x-object-meta-test-user x-timestamp')})
            self.assertEqual(_requests, [])

    def test_UPDATES_subreq_does_not_read_all(self):
        # This tests that if a SSYNC subrequest fails and doesn't read
        # all the subrequest body that it will read and throw away the rest of
        # the body before moving on to the next subrequest.
        # If you comment out the part in ssync_receiver where it does:
        #     for junk in subreq.environ['wsgi.input']:
        #         pass
        # You can then see this test fail.
        _requests = []

        @server.public
        def _PUT(request):
            _requests.append(request)
            # Deliberately just reading up to first 2 bytes.
            request.read_body = request.environ['wsgi.input'].read(2)
            return swob.HTTPInternalServerError()

        class _IgnoreReadlineHint(io.BytesIO):

            def __init__(self, value):
                io.BytesIO.__init__(self, value)

            def readline(self, hint=-1):
                return io.BytesIO.readline(self)

        self.controller.PUT = _PUT
        self.controller.network_chunk_size = 2
        self.controller.logger = mock.MagicMock()
        req = swob.Request.blank(
            '/device/partition',
            environ={'REQUEST_METHOD': 'SSYNC'},
            body=':MISSING_CHECK: START\r\n:MISSING_CHECK: END\r\n'
                 ':UPDATES: START\r\n'
                 'PUT /a/c/o1\r\n'
                 'Content-Length: 3\r\n'
                 'X-Timestamp: 1364456113.00001\r\n'
                 '\r\n'
                 '123'
                 'PUT /a/c/o2\r\n'
                 'Content-Length: 1\r\n'
                 'X-Timestamp: 1364456113.00002\r\n'
                 '\r\n'
                 '1')
        req.environ['wsgi.input'] = _IgnoreReadlineHint(req.body)
        resp = req.get_response(self.controller)
        if six.PY2:
            final_line = (b":ERROR: 500 'ERROR: With :UPDATES: "
                          b"2 failures to 0 successes'")
        else:
            final_line = (b":ERROR: 500 b'ERROR: With :UPDATES: "
                          b"2 failures to 0 successes'")
        self.assertEqual(
            self.body_lines(resp.body),
            [b':MISSING_CHECK: START', b':MISSING_CHECK: END', final_line])
        self.assertEqual(resp.status_int, 200)
        self.assertFalse(self.controller.logger.exception.called)
        self.assertFalse(self.controller.logger.error.called)
        self.assertTrue(self.controller.logger.warning.called)
        self.assertEqual(2, self.controller.logger.warning.call_count)
        self.assertEqual(len(_requests), 2)  # sanity
        req = _requests.pop(0)
        self.assertEqual(req.path, '/device/partition/a/c/o1')
        self.assertEqual(req.content_length, 3)
        self.assertEqual(req.headers, {
            'Content-Length': '3',
            'X-Timestamp': '1364456113.00001',
            'Host': 'localhost:80',
            'X-Backend-Storage-Policy-Index': '0',
            'X-Backend-Replication': 'True',
            'X-Backend-Replication-Headers': (
                'content-length x-timestamp')})
        self.assertEqual(req.read_body, b'12')
        req = _requests.pop(0)
        self.assertEqual(req.path, '/device/partition/a/c/o2')
        self.assertEqual(req.content_length, 1)
        self.assertEqual(req.headers, {
            'Content-Length': '1',
            'X-Timestamp': '1364456113.00002',
            'Host': 'localhost:80',
            'X-Backend-Storage-Policy-Index': '0',
            'X-Backend-Replication': 'True',
            'X-Backend-Replication-Headers': (
                'content-length x-timestamp')})
        self.assertEqual(req.read_body, b'1')
        self.assertEqual(_requests, [])


@patch_policies(with_ec_default=True)
class TestSsyncRxServer(unittest.TestCase):
    # Tests to verify behavior of SSYNC requests sent to an object
    # server socket.

    def setUp(self):
        skip_if_no_xattrs()
        # dirs
        self.tmpdir = tempfile.mkdtemp()
        self.tempdir = os.path.join(self.tmpdir, 'tmp_test_obj_server')

        self.devices = os.path.join(self.tempdir, 'srv/node')
        for device in ('sda1', 'sdb1'):
            os.makedirs(os.path.join(self.devices, device))

        self.conf = {
            'devices': self.devices,
            'mount_check': 'false',
            'swift_dir': self.tempdir,
        }
        self.rx_logger = debug_logger('test-object-server')
        rx_server = server.ObjectController(self.conf, logger=self.rx_logger)
        self.rx_ip = '127.0.0.1'
        self.sock = listen_zero()
        self.rx_server = eventlet.spawn(
            eventlet.wsgi.server, self.sock, rx_server, utils.NullLogger())
        self.rx_port = self.sock.getsockname()[1]
        self.tx_logger = debug_logger('test-reconstructor')
        self.daemon = ObjectReconstructor(self.conf, self.tx_logger)
        self.daemon._diskfile_mgr = self.daemon._df_router[POLICIES[0]]

    def tearDown(self):
        self.rx_server.kill()
        self.sock.close()
        eventlet.sleep(0)
        shutil.rmtree(self.tmpdir)

    def test_SSYNC_disconnect(self):
        node = {
            'replication_ip': '127.0.0.1',
            'replication_port': self.rx_port,
            'device': 'sdb1',
        }
        job = {
            'partition': 0,
            'policy': POLICIES[0],
            'device': 'sdb1',
        }
        sender = ssync_sender.Sender(self.daemon, node, job, ['abc'])

        # kick off the sender and let the error trigger failure
        with mock.patch(
                'swift.obj.ssync_receiver.Receiver.initialize_request') \
                as mock_initialize_request:
            mock_initialize_request.side_effect = \
                swob.HTTPInternalServerError()
            success, _ = sender()
        self.assertFalse(success)
        stderr = six.StringIO()
        with mock.patch('sys.stderr', stderr):
            # let gc and eventlet spin a bit
            del sender
            for i in range(3):
                eventlet.sleep(0)
        self.assertNotIn('ValueError: invalid literal for int() with base 16',
                         stderr.getvalue())

    def test_SSYNC_device_not_available(self):
        with mock.patch('swift.obj.ssync_receiver.Receiver.missing_check')\
                as mock_missing_check:
            self.connection = bufferedhttp.BufferedHTTPConnection(
                '127.0.0.1:%s' % self.rx_port)
            self.connection.putrequest('SSYNC', '/sdc1/0')
            self.connection.putheader('Transfer-Encoding', 'chunked')
            self.connection.putheader('X-Backend-Storage-Policy-Index',
                                      int(POLICIES[0]))
            self.connection.endheaders()
            resp = self.connection.getresponse()
        self.assertEqual(507, resp.status)
        resp.read()
        resp.close()
        # sanity check that the receiver did not proceed to missing_check
        self.assertFalse(mock_missing_check.called)

    def test_SSYNC_read_error(self):
        # verify that read errors from wsgi reader are caught and reported
        def do_send(data):
            self.rx_logger.clear()
            self.connection = bufferedhttp.BufferedHTTPConnection(
                '127.0.0.1:%s' % self.rx_port)
            self.connection.putrequest('SSYNC', '/sda1/0')
            self.connection.putheader('Transfer-Encoding', 'chunked')
            self.connection.putheader('X-Backend-Storage-Policy-Index',
                                      int(POLICIES[0]))
            self.connection.endheaders()
            resp = self.connection.getresponse()
            self.assertEqual(200, resp.status)
            resp.close()
            self.connection.send(data)
            self.connection.close()
            for sleep_time in (0, 0.1, 1):
                lines = self.rx_logger.get_lines_for_level('error')
                if lines:
                    return lines
                eventlet.sleep(sleep_time)
            return []

        # check read errors during missing_check phase
        error_lines = do_send(b'')
        self.assertEqual(1, len(error_lines))
        self.assertIn('missing_check start: invalid literal', error_lines[0])

        error_lines = do_send(b'1\r\n')
        self.assertEqual(1, len(error_lines))
        self.assertIn('missing_check start: unexpected end of file',
                      error_lines[0])

        error_lines = do_send(b'17\r\n:MISSING_CHECK: START\r\n\r\nx\r\n')
        self.assertEqual(1, len(error_lines))
        self.assertIn('missing_check line: invalid literal', error_lines[0])

        error_lines = do_send(b'17\r\n:MISSING_CHECK: START\r\n\r\n12\r\n')
        self.assertEqual(1, len(error_lines))
        self.assertIn('missing_check line: unexpected end of file',
                      error_lines[0])

        # check read errors during updates phase
        with mock.patch('swift.obj.ssync_receiver.Receiver.missing_check'):
            error_lines = do_send(b'')
        self.assertEqual(1, len(error_lines))
        self.assertIn('updates start: invalid literal', error_lines[0])

        with mock.patch('swift.obj.ssync_receiver.Receiver.missing_check'):
            error_lines = do_send(b'1\r\n')
        self.assertEqual(1, len(error_lines))
        self.assertIn('updates start: unexpected end of file', error_lines[0])

        with mock.patch('swift.obj.ssync_receiver.Receiver.missing_check'):
            error_lines = do_send(b'11\r\n:UPDATES: START\r\n\r\nx\r\n')
        self.assertEqual(1, len(error_lines))
        self.assertIn('updates line: invalid literal', error_lines[0])

        with mock.patch('swift.obj.ssync_receiver.Receiver.missing_check'):
            error_lines = do_send(b'11\r\n:UPDATES: START\r\n\r\n12\r\n')
        self.assertEqual(1, len(error_lines))
        self.assertIn('updates line: unexpected end of file', error_lines[0])

    def test_SSYNC_invalid_policy(self):
        valid_indices = sorted([int(policy) for policy in POLICIES])
        bad_index = valid_indices[-1] + 1
        with mock.patch('swift.obj.ssync_receiver.Receiver.missing_check')\
                as mock_missing_check:
            self.connection = bufferedhttp.BufferedHTTPConnection(
                '127.0.0.1:%s' % self.rx_port)
            self.connection.putrequest('SSYNC', '/sda1/0')
            self.connection.putheader('Transfer-Encoding', 'chunked')
            self.connection.putheader('X-Backend-Storage-Policy-Index',
                                      bad_index)
            self.connection.endheaders()
            resp = self.connection.getresponse()
        self.assertEqual(503, resp.status)
        resp.read()
        resp.close()
        # sanity check that the receiver did not proceed to missing_check
        self.assertFalse(mock_missing_check.called)

    def test_bad_request_invalid_frag_index(self):
        with mock.patch('swift.obj.ssync_receiver.Receiver.missing_check')\
                as mock_missing_check:
            self.connection = bufferedhttp.BufferedHTTPConnection(
                '127.0.0.1:%s' % self.rx_port)
            self.connection.putrequest('SSYNC', '/sda1/0')
            self.connection.putheader('Transfer-Encoding', 'chunked')
            self.connection.putheader('X-Backend-Ssync-Frag-Index',
                                      'None')
            self.connection.endheaders()
            resp = self.connection.getresponse()
        self.assertEqual(400, resp.status)
        error_msg = resp.read()
        self.assertIn(b"Invalid X-Backend-Ssync-Frag-Index 'None'", error_msg)
        resp.close()
        # sanity check that the receiver did not proceed to missing_check
        self.assertFalse(mock_missing_check.called)


class TestModuleMethods(unittest.TestCase):
    def test_decode_missing(self):
        object_hash = '9d41d8cd98f00b204e9800998ecf0abc'
        ts_iter = make_timestamp_iter()
        t_data = next(ts_iter)
        t_meta = next(ts_iter)
        t_ctype = next(ts_iter)
        d_meta_data = t_meta.raw - t_data.raw
        d_ctype_data = t_ctype.raw - t_data.raw

        # legacy single timestamp string
        msg = '%s %s' % (object_hash, t_data.internal)
        expected = dict(object_hash=object_hash,
                        ts_meta=t_data,
                        ts_data=t_data,
                        ts_ctype=t_data,
                        durable=True)
        self.assertEqual(expected,
                         ssync_receiver.decode_missing(msg.encode('ascii')))

        # hex meta delta encoded as extra message part
        msg = '%s %s m:%x' % (object_hash, t_data.internal, d_meta_data)
        expected = dict(object_hash=object_hash,
                        ts_data=t_data,
                        ts_meta=t_meta,
                        ts_ctype=t_data,
                        durable=True)
        self.assertEqual(expected,
                         ssync_receiver.decode_missing(msg.encode('ascii')))

        # hex content type delta encoded in extra message part
        msg = '%s %s t:%x,m:%x' % (object_hash, t_data.internal,
                                   d_ctype_data, d_meta_data)
        expected = dict(object_hash=object_hash,
                        ts_data=t_data,
                        ts_meta=t_meta,
                        ts_ctype=t_ctype,
                        durable=True)
        self.assertEqual(
            expected, ssync_receiver.decode_missing(msg.encode('ascii')))

        # order of subparts does not matter
        msg = '%s %s m:%x,t:%x' % (object_hash, t_data.internal,
                                   d_meta_data, d_ctype_data)
        self.assertEqual(
            expected, ssync_receiver.decode_missing(msg.encode('ascii')))

        # hex content type delta may be zero
        msg = '%s %s t:0,m:%x' % (object_hash, t_data.internal, d_meta_data)
        expected = dict(object_hash=object_hash,
                        ts_data=t_data,
                        ts_meta=t_meta,
                        ts_ctype=t_data,
                        durable=True)
        self.assertEqual(
            expected, ssync_receiver.decode_missing(msg.encode('ascii')))

        # unexpected zero delta is tolerated
        msg = '%s %s m:0' % (object_hash, t_data.internal)
        expected = dict(object_hash=object_hash,
                        ts_meta=t_data,
                        ts_data=t_data,
                        ts_ctype=t_data,
                        durable=True)
        self.assertEqual(expected,
                         ssync_receiver.decode_missing(msg.encode('ascii')))

        # unexpected subparts in timestamp delta part are tolerated
        msg = '%s %s c:12345,m:%x,junk' % (object_hash,
                                           t_data.internal,
                                           d_meta_data)
        expected = dict(object_hash=object_hash,
                        ts_meta=t_meta,
                        ts_data=t_data,
                        ts_ctype=t_data,
                        durable=True)
        self.assertEqual(
            expected, ssync_receiver.decode_missing(msg.encode('ascii')))

        # extra message parts tolerated
        msg = '%s %s m:%x future parts' % (object_hash,
                                           t_data.internal,
                                           d_meta_data)
        expected = dict(object_hash=object_hash,
                        ts_meta=t_meta,
                        ts_data=t_data,
                        ts_ctype=t_data,
                        durable=True)
        self.assertEqual(expected,
                         ssync_receiver.decode_missing(msg.encode('ascii')))

        # not durable
        def check_non_durable(durable_val):
            msg = '%s %s m:%x,durable:%s' % (object_hash,
                                             t_data.internal,
                                             d_meta_data,
                                             durable_val)
            expected = dict(object_hash=object_hash,
                            ts_meta=t_meta,
                            ts_data=t_data,
                            ts_ctype=t_data,
                            durable=False)
            self.assertEqual(
                expected, ssync_receiver.decode_missing(msg.encode('ascii')))
        check_non_durable('no')
        check_non_durable('false')
        check_non_durable('False')

        # explicit durable (as opposed to True by default)
        def check_durable(durable_val):
            msg = '%s %s m:%x,durable:%s' % (object_hash,
                                             t_data.internal,
                                             d_meta_data,
                                             durable_val)
            expected = dict(object_hash=object_hash,
                            ts_meta=t_meta,
                            ts_data=t_data,
                            ts_ctype=t_data,
                            durable=True)
            self.assertEqual(
                expected, ssync_receiver.decode_missing(msg.encode('ascii')))
        check_durable('yes')
        check_durable('true')
        check_durable('True')

    def test_encode_wanted(self):
        ts_iter = make_timestamp_iter()
        old_t_data = next(ts_iter)
        t_data = next(ts_iter)
        old_t_meta = next(ts_iter)
        t_meta = next(ts_iter)

        remote = {
            'object_hash': 'theremotehash',
            'ts_data': t_data,
            'ts_meta': t_meta,
        }

        # missing
        local = {}
        expected = 'theremotehash dm'
        self.assertEqual(ssync_receiver.encode_wanted(remote, local),
                         expected)

        # in-sync
        local = {
            'ts_data': t_data,
            'ts_meta': t_meta,
        }
        expected = None
        self.assertEqual(ssync_receiver.encode_wanted(remote, local),
                         expected)

        # out-of-sync
        local = {
            'ts_data': old_t_data,
            'ts_meta': old_t_meta,
        }
        expected = 'theremotehash dm'
        self.assertEqual(ssync_receiver.encode_wanted(remote, local),
                         expected)

        # old data
        local = {
            'ts_data': old_t_data,
            'ts_meta': t_meta,
        }
        expected = 'theremotehash d'
        self.assertEqual(ssync_receiver.encode_wanted(remote, local),
                         expected)

        # old metadata
        local = {
            'ts_data': t_data,
            'ts_meta': old_t_meta,
        }
        expected = 'theremotehash m'
        self.assertEqual(ssync_receiver.encode_wanted(remote, local),
                         expected)

        # in-sync tombstone
        local = {
            'ts_data': t_data,
        }
        expected = None
        self.assertEqual(ssync_receiver.encode_wanted(remote, local),
                         expected)

        # old tombstone
        local = {
            'ts_data': old_t_data,
        }
        expected = 'theremotehash d'
        self.assertEqual(ssync_receiver.encode_wanted(remote, local),
                         expected)


if __name__ == '__main__':
    unittest.main()
