Use six to fix imports on Python 3

Get configparser, queue, http_client modules from six.moves.

Patch generated by the six_moves operation of the sixer tool:
https://pypi.python.org/pypi/sixer

Change-Id: I666241ab50101b8cc6f992dd80134ce27327bd7d

swift/common/constraints.py

@@ -17,7 +17,8 @@ import os
 import urllib
 import time
 from urllib import unquote
-from ConfigParser import ConfigParser, NoSectionError, NoOptionError
+
+from six.moves.configparser import ConfigParser, NoSectionError, NoOptionError
 
 from swift.common import utils, exceptions
 from swift.common.swob import HTTPBadRequest, HTTPLengthRequired, \

swift/common/container_sync_realms.py

@@ -13,13 +13,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import ConfigParser
 import errno
 import hashlib
 import hmac
 import os
 import time
 
+from six.moves import configparser
+
 from swift import gettext_ as _
 from swift.common.utils import get_valid_utf8_str
 
@@ -61,9 +62,9 @@ class ContainerSyncRealms(object):
                 if mtime != self.conf_path_mtime:
                     self.conf_path_mtime = mtime
                     try:
-                        conf = ConfigParser.SafeConfigParser()
+                        conf = configparser.SafeConfigParser()
                         conf.read(self.conf_path)
-                    except ConfigParser.ParsingError as err:
+                    except configparser.ParsingError as err:
                         self.logger.error(
                             _('Could not load %r: %s'), self.conf_path, err)
                     else:
@@ -72,11 +73,11 @@ class ContainerSyncRealms(object):
                                 'DEFAULT', 'mtime_check_interval')
                             self.next_mtime_check = \
                                 now + self.mtime_check_interval
-                        except ConfigParser.NoOptionError:
+                        except configparser.NoOptionError:
                             self.mtime_check_interval = 300
                             self.next_mtime_check = \
                                 now + self.mtime_check_interval
-                        except (ConfigParser.ParsingError, ValueError) as err:
+                        except (configparser.ParsingError, ValueError) as err:
                             self.logger.error(
                                 _('Error in %r with mtime_check_interval: %s'),
                                 self.conf_path, err)

swift/common/direct_client.py

@@ -20,10 +20,10 @@ through the proxy.
 
 import os
 import socket
-from httplib import HTTPException
 from time import time
 
 from eventlet import sleep, Timeout
+from six.moves.http_client import HTTPException
 
 from swift.common.bufferedhttp import http_connect
 from swift.common.exceptions import ClientException

swift/common/middleware/dlo.py

@@ -14,7 +14,9 @@
 # limitations under the License.
 
 import os
-from ConfigParser import ConfigParser, NoSectionError, NoOptionError
+
+from six.moves.configparser import ConfigParser, NoSectionError, NoOptionError
+
 from hashlib import md5
 from swift.common import constraints
 from swift.common.exceptions import ListingIterError, SegmentError

swift/common/middleware/memcache.py

@@ -14,7 +14,8 @@
 # limitations under the License.
 
 import os
-from ConfigParser import ConfigParser, NoSectionError, NoOptionError
+
+from six.moves.configparser import ConfigParser, NoSectionError, NoOptionError
 
 from swift.common.memcached import (MemcacheRing, CONN_TIMEOUT, POOL_TIMEOUT,
                                     IO_TIMEOUT, TRY_COUNT)

swift/common/storage_policy.py

@@ -11,12 +11,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ConfigParser import ConfigParser
+
 import os
 import string
 import textwrap
 import six
 
+from six.moves.configparser import ConfigParser
+
 from swift.common.utils import (
     config_true_value, SWIFT_CONF_FILE, whataremyips)
 from swift.common.ring import Ring, RingData

swift/common/utils.py

@@ -38,10 +38,8 @@ from urllib import quote as _quote
 from contextlib import contextmanager, closing
 import ctypes
 import ctypes.util
-from ConfigParser import ConfigParser, NoSectionError, NoOptionError, \
-    RawConfigParser
 from optparse import OptionParser
-from Queue import Queue, Empty
+
 from tempfile import mkstemp, NamedTemporaryFile
 try:
     import simplejson as json
@@ -64,6 +62,9 @@ import netifaces
 import codecs
 utf8_decoder = codecs.getdecoder('utf-8')
 utf8_encoder = codecs.getencoder('utf-8')
+from six.moves.configparser import ConfigParser, NoSectionError, \
+    NoOptionError, RawConfigParser
+from six.moves.queue import Queue, Empty
 from six.moves import range
 
 from swift import gettext_ as _

test/functional/__init__.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import httplib
 import mock
 import os
 import sys
@@ -24,15 +23,19 @@ import eventlet
 import eventlet.debug
 import functools
 import random
-from ConfigParser import ConfigParser, NoSectionError
+
 from time import time, sleep
-from httplib import HTTPException
 from urlparse import urlparse
 from nose import SkipTest
 from contextlib import closing
 from gzip import GzipFile
 from shutil import rmtree
 from tempfile import mkdtemp
+
+from six.moves.configparser import ConfigParser, NoSectionError
+from six.moves import http_client
+from six.moves.http_client import HTTPException
+
 from swift.common.middleware.memcache import MemcacheMiddleware
 from swift.common.storage_policy import parse_storage_policies, PolicyError
 
@@ -53,7 +56,7 @@ from swift.container import server as container_server
 from swift.obj import server as object_server, mem_server as mem_object_server
 import swift.proxy.controllers.obj
 
-httplib._MAXHEADERS = constraints.MAX_HEADER_COUNT
+http_client._MAXHEADERS = constraints.MAX_HEADER_COUNT
 DEBUG = True
 
 # In order to get the proper blocking behavior of sockets without using

test/functional/swift_test_client.py

@@ -14,7 +14,6 @@
 # limitations under the License.
 
 import hashlib
-import httplib
 import os
 import random
 import socket
@@ -22,11 +21,11 @@ import time
 import urllib
 
 import simplejson as json
-
 from nose import SkipTest
 from xml.dom import minidom
 
 import six
+from six.moves import http_client
 from swiftclient import get_auth
 
 from swift.common import constraints
@@ -34,7 +33,7 @@ from swift.common.utils import config_true_value
 
 from test import safe_repr
 
-httplib._MAXHEADERS = constraints.MAX_HEADER_COUNT
+http_client._MAXHEADERS = constraints.MAX_HEADER_COUNT
 
 
 class AuthenticationFailed(Exception):
@@ -166,10 +165,10 @@ class Connection(object):
         x = storage_url.split('/')
 
         if x[0] == 'http:':
-            self.conn_class = httplib.HTTPConnection
+            self.conn_class = http_client.HTTPConnection
             self.storage_port = 80
         elif x[0] == 'https:':
-            self.conn_class = httplib.HTTPSConnection
+            self.conn_class = http_client.HTTPSConnection
             self.storage_port = 443
         else:
             raise ValueError('unexpected protocol %s' % (x[0]))
@@ -283,7 +282,7 @@ class Connection(object):
 
             try:
                 self.response = try_request()
-            except httplib.HTTPException as e:
+            except http_client.HTTPException as e:
                 fail_messages.append(safe_repr(e))
                 continue
 

test/probe/common.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from httplib import HTTPConnection
+
 import os
 from subprocess import Popen, PIPE
 import sys
@@ -22,8 +22,9 @@ from collections import defaultdict
 import unittest
 from nose import SkipTest
 
-from swiftclient import get_auth, head_account
+from six.moves.http_client import HTTPConnection
 
+from swiftclient import get_auth, head_account
 from swift.obj.diskfile import get_data_dir
 from swift.common.ring import Ring
 from swift.common.utils import readconf, renamer

test/probe/test_account_get_fake_responses_match.py

@@ -14,10 +14,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import httplib
 import re
 import unittest
 
+from six.moves import http_client
 from swiftclient import get_auth
 from test.probe.common import ReplProbeTest
 from urlparse import urlparse
@@ -49,7 +49,7 @@ class TestAccountGetFakeResponsesMatch(ReplProbeTest):
         host, port = netloc.split(':')
         port = int(port)
 
-        conn = httplib.HTTPConnection(host, port)
+        conn = http_client.HTTPConnection(host, port)
         conn.request(method, self._account_path(account), headers=headers)
         resp = conn.getresponse()
         if resp.status // 100 != 2:

test/unit/__init__.py

@@ -37,7 +37,8 @@ from swift.common import swob, utils
 from swift.common.ring import Ring, RingData
 from hashlib import md5
 import logging.handlers
-from httplib import HTTPException
+
+from six.moves.http_client import HTTPException
 from swift.common import storage_policy
 from swift.common.storage_policy import StoragePolicy, ECStoragePolicy
 import functools

test/unit/common/middleware/test_memcache.py

@@ -16,9 +16,9 @@
 import os
 from textwrap import dedent
 import unittest
-from ConfigParser import NoSectionError, NoOptionError
 
 import mock
+from six.moves.configparser import NoSectionError, NoOptionError
 
 from swift.common.middleware import memcache
 from swift.common.memcached import MemcacheRing

test/unit/common/test_storage_policy.py

@@ -14,10 +14,11 @@
 """ Tests for swift.common.storage_policies """
 import six
 import unittest
-from ConfigParser import ConfigParser
 import os
 import mock
 from functools import partial
+
+from six.moves.configparser import ConfigParser
 from tempfile import NamedTemporaryFile
 from test.unit import patch_policies, FakeRing, temptree
 from swift.common.storage_policy import (

test/unit/common/test_utils.py

@@ -28,14 +28,15 @@ import os
 import mock
 import random
 import re
-from six import StringIO
-from six.moves import range
 import socket
 import stat
 import sys
 import json
 import math
 
+from six import StringIO
+from six.moves.queue import Queue, Empty
+from six.moves import range
 from textwrap import dedent
 
 import tempfile
@@ -47,7 +48,6 @@ import fcntl
 import shutil
 from contextlib import nested
 
-from Queue import Queue, Empty
 from getpass import getuser
 from shutil import rmtree
 from functools import partial