initial oslo.middleware checkin

23 files changed, 1084 insertions, 27 deletions

diff --git a/.testr.conf b/.testr.conf
index 19721fc..6d83b3c 100644
--- a/.testr.conf
+++ b/.testr.conf
@@ -2,6 +2,6 @@
 test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
              OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
              OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-60} \
-             ${PYTHON:-python} -m subunit.run discover -t ./ ./tests $LISTOPT $IDOPTION
+             ${PYTHON:-python} -m subunit.run discover -t ./ . $LISTOPT $IDOPTION
 test_id_option=--load-list $IDFILE
-test_list_option=--list
\ No newline at end of file
+test_list_option=--list
diff --git a/openstack-common.conf b/openstack-common.conf
new file mode 100644
index 0000000..c9cc7b0
--- /dev/null
+++ b/openstack-common.conf
@@ -0,0 +1,12 @@
+[DEFAULT]
+
+# The list of modules to copy from oslo-incubator.git
+module=context
+module=fixture/config
+module=gettextutils
+
+script = tools/run_cross_tests.sh
+
+# The base module to hold the copy of openstack.common
+base=oslo.middleware
+
diff --git a/oslo/__init__.py b/oslo/__init__.py
index c659cac..bf1237a 100644
--- a/oslo/__init__.py
+++ b/oslo/__init__.py
@@ -12,4 +12,4 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-__import__('pkg_resources').declare_namespace(__name__)
\ No newline at end of file
+__import__('pkg_resources').declare_namespace(__name__)
diff --git a/oslo/middleware/catch_errors.py b/oslo/middleware/catch_errors.py
index 4f0d4bf..9a44b68 100644
--- a/oslo/middleware/catch_errors.py
+++ b/oslo/middleware/catch_errors.py
@@ -18,13 +18,13 @@
 It catches all exceptions from subsequent applications in WSGI pipeline
 to hide internal errors from API response.
 """
+import logging
 
 import webob.dec
 import webob.exc
 
-from openstack.common.gettextutils import _LE
-from openstack.common import log as logging
 from oslo.middleware import base
+from oslo.middleware.openstack.common.gettextutils import _LE
 
 
 LOG = logging.getLogger(__name__)
diff --git a/oslo/middleware/openstack/__init__.py b/oslo/middleware/openstack/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/oslo/middleware/openstack/__init__.py
diff --git a/oslo/middleware/openstack/common/__init__.py b/oslo/middleware/openstack/common/__init__.py
new file mode 100644
index 0000000..d1223ea
--- /dev/null
+++ b/oslo/middleware/openstack/common/__init__.py
@@ -0,0 +1,17 @@
+#
+#    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 six
+
+
+six.add_move(six.MovedModule('mox', 'mox', 'mox3.mox'))
diff --git a/oslo/middleware/openstack/common/context.py b/oslo/middleware/openstack/common/context.py
new file mode 100644
index 0000000..b612db7
--- /dev/null
+++ b/oslo/middleware/openstack/common/context.py
@@ -0,0 +1,126 @@
+# Copyright 2011 OpenStack Foundation.
+# All Rights Reserved.
+#
+#    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.
+
+"""
+Simple class that stores security context information in the web request.
+
+Projects should subclass this class if they wish to enhance the request
+context or provide additional information in their specific WSGI pipeline.
+"""
+
+import itertools
+import uuid
+
+
+def generate_request_id():
+    return b'req-' + str(uuid.uuid4()).encode('ascii')
+
+
+class RequestContext(object):
+
+    """Helper class to represent useful information about a request context.
+
+    Stores information about the security context under which the user
+    accesses the system, as well as additional request information.
+    """
+
+    user_idt_format = '{user} {tenant} {domain} {user_domain} {p_domain}'
+
+    def __init__(self, auth_token=None, user=None, tenant=None, domain=None,
+                 user_domain=None, project_domain=None, is_admin=False,
+                 read_only=False, show_deleted=False, request_id=None,
+                 instance_uuid=None):
+        self.auth_token = auth_token
+        self.user = user
+        self.tenant = tenant
+        self.domain = domain
+        self.user_domain = user_domain
+        self.project_domain = project_domain
+        self.is_admin = is_admin
+        self.read_only = read_only
+        self.show_deleted = show_deleted
+        self.instance_uuid = instance_uuid
+        if not request_id:
+            request_id = generate_request_id()
+        self.request_id = request_id
+
+    def to_dict(self):
+        user_idt = (
+            self.user_idt_format.format(user=self.user or '-',
+                                        tenant=self.tenant or '-',
+                                        domain=self.domain or '-',
+                                        user_domain=self.user_domain or '-',
+                                        p_domain=self.project_domain or '-'))
+
+        return {'user': self.user,
+                'tenant': self.tenant,
+                'domain': self.domain,
+                'user_domain': self.user_domain,
+                'project_domain': self.project_domain,
+                'is_admin': self.is_admin,
+                'read_only': self.read_only,
+                'show_deleted': self.show_deleted,
+                'auth_token': self.auth_token,
+                'request_id': self.request_id,
+                'instance_uuid': self.instance_uuid,
+                'user_identity': user_idt}
+
+    @classmethod
+    def from_dict(cls, ctx):
+        return cls(
+            auth_token=ctx.get("auth_token"),
+            user=ctx.get("user"),
+            tenant=ctx.get("tenant"),
+            domain=ctx.get("domain"),
+            user_domain=ctx.get("user_domain"),
+            project_domain=ctx.get("project_domain"),
+            is_admin=ctx.get("is_admin", False),
+            read_only=ctx.get("read_only", False),
+            show_deleted=ctx.get("show_deleted", False),
+            request_id=ctx.get("request_id"),
+            instance_uuid=ctx.get("instance_uuid"))
+
+
+def get_admin_context(show_deleted=False):
+    context = RequestContext(None,
+                             tenant=None,
+                             is_admin=True,
+                             show_deleted=show_deleted)
+    return context
+
+
+def get_context_from_function_and_args(function, args, kwargs):
+    """Find an arg of type RequestContext and return it.
+
+       This is useful in a couple of decorators where we don't
+       know much about the function we're wrapping.
+    """
+
+    for arg in itertools.chain(kwargs.values(), args):
+        if isinstance(arg, RequestContext):
+            return arg
+
+    return None
+
+
+def is_user_context(context):
+    """Indicates if the request context is a normal user."""
+    if not context:
+        return False
+    if context.is_admin:
+        return False
+    if not context.user_id or not context.project_id:
+        return False
+    return True
diff --git a/oslo/middleware/openstack/common/fixture/__init__.py b/oslo/middleware/openstack/common/fixture/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/oslo/middleware/openstack/common/fixture/__init__.py
diff --git a/oslo/middleware/openstack/common/fixture/config.py b/oslo/middleware/openstack/common/fixture/config.py
new file mode 100644
index 0000000..9489b85
--- /dev/null
+++ b/oslo/middleware/openstack/common/fixture/config.py
@@ -0,0 +1,85 @@
+#
+# Copyright 2013 Mirantis, Inc.
+# Copyright 2013 OpenStack Foundation
+# All Rights Reserved.
+#
+#    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 fixtures
+from oslo.config import cfg
+import six
+
+
+class Config(fixtures.Fixture):
+    """Allows overriding configuration settings for the test.
+
+    `conf` will be reset on cleanup.
+
+    """
+
+    def __init__(self, conf=cfg.CONF):
+        self.conf = conf
+
+    def setUp(self):
+        super(Config, self).setUp()
+        # NOTE(morganfainberg): unregister must be added to cleanup before
+        # reset is because cleanup works in reverse order of registered items,
+        # and a reset must occur before unregistering options can occur.
+        self.addCleanup(self._unregister_config_opts)
+        self.addCleanup(self.conf.reset)
+        self._registered_config_opts = {}
+
+    def config(self, **kw):
+        """Override configuration values.
+
+        The keyword arguments are the names of configuration options to
+        override and their values.
+
+        If a `group` argument is supplied, the overrides are applied to
+        the specified configuration option group, otherwise the overrides
+        are applied to the ``default`` group.
+
+        """
+
+        group = kw.pop('group', None)
+        for k, v in six.iteritems(kw):
+            self.conf.set_override(k, v, group)
+
+    def _unregister_config_opts(self):
+        for group in self._registered_config_opts:
+            self.conf.unregister_opts(self._registered_config_opts[group],
+                                      group=group)
+
+    def register_opt(self, opt, group=None):
+        """Register a single option for the test run.
+
+        Options registered in this manner will automatically be unregistered
+        during cleanup.
+
+        If a `group` argument is supplied, it will register the new option
+        to that group, otherwise the option is registered to the ``default``
+        group.
+        """
+        self.conf.register_opt(opt, group=group)
+        self._registered_config_opts.setdefault(group, set()).add(opt)
+
+    def register_opts(self, opts, group=None):
+        """Register multiple options for the test run.
+
+        This works in the same manner as register_opt() but takes a list of
+        options as the first argument. All arguments will be registered to the
+        same group if the ``group`` argument is supplied, otherwise all options
+        will be registered to the ``default`` group.
+        """
+        for opt in opts:
+            self.register_opt(opt, group=group)
diff --git a/oslo/middleware/openstack/common/gettextutils.py b/oslo/middleware/openstack/common/gettextutils.py
new file mode 100644
index 0000000..2233462
--- /dev/null
+++ b/oslo/middleware/openstack/common/gettextutils.py
@@ -0,0 +1,498 @@
+# Copyright 2012 Red Hat, Inc.
+# Copyright 2013 IBM Corp.
+# All Rights Reserved.
+#
+#    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.
+
+"""
+gettext for openstack-common modules.
+
+Usual usage in an openstack.common module:
+
+    from oslo.middleware.openstack.common.gettextutils import _
+"""
+
+import copy
+import functools
+import gettext
+import locale
+from logging import handlers
+import os
+
+from babel import localedata
+import six
+
+_AVAILABLE_LANGUAGES = {}
+
+# FIXME(dhellmann): Remove this when moving to oslo.i18n.
+USE_LAZY = False
+
+
+class TranslatorFactory(object):
+    """Create translator functions
+    """
+
+    def __init__(self, domain, lazy=False, localedir=None):
+        """Establish a set of translation functions for the domain.
+
+        :param domain: Name of translation domain,
+                       specifying a message catalog.
+        :type domain: str
+        :param lazy: Delays translation until a message is emitted.
+                     Defaults to False.
+        :type lazy: Boolean
+        :param localedir: Directory with translation catalogs.
+        :type localedir: str
+        """
+        self.domain = domain
+        self.lazy = lazy
+        if localedir is None:
+            localedir = os.environ.get(domain.upper() + '_LOCALEDIR')
+        self.localedir = localedir
+
+    def _make_translation_func(self, domain=None):
+        """Return a new translation function ready for use.
+
+        Takes into account whether or not lazy translation is being
+        done.
+
+        The domain can be specified to override the default from the
+        factory, but the localedir from the factory is always used
+        because we assume the log-level translation catalogs are
+        installed in the same directory as the main application
+        catalog.
+
+        """
+        if domain is None:
+            domain = self.domain
+        if self.lazy:
+            return functools.partial(Message, domain=domain)
+        t = gettext.translation(
+            domain,
+            localedir=self.localedir,
+            fallback=True,
+        )
+        if six.PY3:
+            return t.gettext
+        return t.ugettext
+
+    @property
+    def primary(self):
+        "The default translation function."
+        return self._make_translation_func()
+
+    def _make_log_translation_func(self, level):
+        return self._make_translation_func(self.domain + '-log-' + level)
+
+    @property
+    def log_info(self):
+        "Translate info-level log messages."
+        return self._make_log_translation_func('info')
+
+    @property
+    def log_warning(self):
+        "Translate warning-level log messages."
+        return self._make_log_translation_func('warning')
+
+    @property
+    def log_error(self):
+        "Translate error-level log messages."
+        return self._make_log_translation_func('error')
+
+    @property
+    def log_critical(self):
+        "Translate critical-level log messages."
+        return self._make_log_translation_func('critical')
+
+
+# NOTE(dhellmann): When this module moves out of the incubator into
+# oslo.i18n, these global variables can be moved to an integration
+# module within each application.
+
+# Create the global translation functions.
+_translators = TranslatorFactory('oslo.middleware')
+
+# The primary translation function using the well-known name "_"
+_ = _translators.primary
+
+# Translators for log levels.
+#
+# The abbreviated names are meant to reflect the usual use of a short
+# name like '_'. The "L" is for "log" and the other letter comes from
+# the level.
+_LI = _translators.log_info
+_LW = _translators.log_warning
+_LE = _translators.log_error
+_LC = _translators.log_critical
+
+# NOTE(dhellmann): End of globals that will move to the application's
+# integration module.
+
+
+def enable_lazy():
+    """Convenience function for configuring _() to use lazy gettext
+
+    Call this at the start of execution to enable the gettextutils._
+    function to use lazy gettext functionality. This is useful if
+    your project is importing _ directly instead of using the
+    gettextutils.install() way of importing the _ function.
+    """
+    # FIXME(dhellmann): This function will be removed in oslo.i18n,
+    # because the TranslatorFactory makes it superfluous.
+    global _, _LI, _LW, _LE, _LC, USE_LAZY
+    tf = TranslatorFactory('oslo.middleware', lazy=True)
+    _ = tf.primary
+    _LI = tf.log_info
+    _LW = tf.log_warning
+    _LE = tf.log_error
+    _LC = tf.log_critical
+    USE_LAZY = True
+
+
+def install(domain, lazy=False):
+    """Install a _() function using the given translation domain.
+
+    Given a translation domain, install a _() function using gettext's
+    install() function.
+
+    The main difference from gettext.install() is that we allow
+    overriding the default localedir (e.g. /usr/share/locale) using
+    a translation-domain-specific environment variable (e.g.
+    NOVA_LOCALEDIR).
+
+    :param domain: the translation domain
+    :param lazy: indicates whether or not to install the lazy _() function.
+                 The lazy _() introduces a way to do deferred translation
+                 of messages by installing a _ that builds Message objects,
+                 instead of strings, which can then be lazily translated into
+                 any available locale.
+    """
+    if lazy:
+        from six import moves
+        tf = TranslatorFactory(domain, lazy=True)
+        moves.builtins.__dict__['_'] = tf.primary
+    else:
+        localedir = '%s_LOCALEDIR' % domain.upper()
+        if six.PY3:
+            gettext.install(domain,
+                            localedir=os.environ.get(localedir))
+        else:
+            gettext.install(domain,
+                            localedir=os.environ.get(localedir),
+                            unicode=True)
+
+
+class Message(six.text_type):
+    """A Message object is a unicode object that can be translated.
+
+    Translation of Message is done explicitly using the translate() method.
+    For all non-translation intents and purposes, a Message is simply unicode,
+    and can be treated as such.
+    """
+
+    def __new__(cls, msgid, msgtext=None, params=None,
+                domain='oslo.middleware', *args):
+        """Create a new Message object.
+
+        In order for translation to work gettext requires a message ID, this
+        msgid will be used as the base unicode text. It is also possible
+        for the msgid and the base unicode text to be different by passing
+        the msgtext parameter.
+        """
+        # If the base msgtext is not given, we use the default translation
+        # of the msgid (which is in English) just in case the system locale is
+        # not English, so that the base text will be in that locale by default.
+        if not msgtext:
+            msgtext = Message._translate_msgid(msgid, domain)
+        # We want to initialize the parent unicode with the actual object that
+        # would have been plain unicode if 'Message' was not enabled.
+        msg = super(Message, cls).__new__(cls, msgtext)
+        msg.msgid = msgid
+        msg.domain = domain
+        msg.params = params
+        return msg
+
+    def translate(self, desired_locale=None):
+        """Translate this message to the desired locale.
+
+        :param desired_locale: The desired locale to translate the message to,
+                               if no locale is provided the message will be
+                               translated to the system's default locale.
+
+        :returns: the translated message in unicode
+        """
+
+        translated_message = Message._translate_msgid(self.msgid,
+                                                      self.domain,
+                                                      desired_locale)
+        if self.params is None:
+            # No need for more translation
+            return translated_message
+
+        # This Message object may have been formatted with one or more
+        # Message objects as substitution arguments, given either as a single
+        # argument, part of a tuple, or as one or more values in a dictionary.
+        # When translating this Message we need to translate those Messages too
+        translated_params = _translate_args(self.params, desired_locale)
+
+        translated_message = translated_message % translated_params
+
+        return translated_message
+
+    @staticmethod
+    def _translate_msgid(msgid, domain, desired_locale=None):
+        if not desired_locale:
+            system_locale = locale.getdefaultlocale()
+            # If the system locale is not available to the runtime use English
+            if not system_locale[0]:
+                desired_locale = 'en_US'
+            else:
+                desired_locale = system_locale[0]
+
+        locale_dir = os.environ.get(domain.upper() + '_LOCALEDIR')
+        lang = gettext.translation(domain,
+                                   localedir=locale_dir,
+                                   languages=[desired_locale],
+                                   fallback=True)
+        if six.PY3:
+            translator = lang.gettext
+        else:
+            translator = lang.ugettext
+
+        translated_message = translator(msgid)
+        return translated_message
+
+    def __mod__(self, other):
+        # When we mod a Message we want the actual operation to be performed
+        # by the parent class (i.e. unicode()), the only thing  we do here is
+        # save the original msgid and the parameters in case of a translation
+        params = self._sanitize_mod_params(other)
+        unicode_mod = super(Message, self).__mod__(params)
+        modded = Message(self.msgid,
+                         msgtext=unicode_mod,
+                         params=params,
+                         domain=self.domain)
+        return modded
+
+    def _sanitize_mod_params(self, other):
+        """Sanitize the object being modded with this Message.
+
+        - Add support for modding 'None' so translation supports it
+        - Trim the modded object, which can be a large dictionary, to only
+        those keys that would actually be used in a translation
+        - Snapshot the object being modded, in case the message is
+        translated, it will be used as it was when the Message was created
+        """
+        if other is None:
+            params = (other,)
+        elif isinstance(other, dict):
+            # Merge the dictionaries
+            # Copy each item in case one does not support deep copy.
+            params = {}
+            if isinstance(self.params, dict):
+                for key, val in self.params.items():
+                    params[key] = self._copy_param(val)
+            for key, val in other.items():
+                params[key] = self._copy_param(val)
+        else:
+            params = self._copy_param(other)
+        return params
+
+    def _copy_param(self, param):
+        try:
+            return copy.deepcopy(param)
+        except Exception:
+            # Fallback to casting to unicode this will handle the
+            # python code-like objects that can't be deep-copied
+            return six.text_type(param)
+
+    def __add__(self, other):
+        msg = _('Message objects do not support addition.')
+        raise TypeError(msg)
+
+    def __radd__(self, other):
+        return self.__add__(other)
+
+    if six.PY2:
+        def __str__(self):
+            # NOTE(luisg): Logging in python 2.6 tries to str() log records,
+            # and it expects specifically a UnicodeError in order to proceed.
+            msg = _('Message objects do not support str() because they may '
+                    'contain non-ascii characters. '
+                    'Please use unicode() or translate() instead.')
+            raise UnicodeError(msg)
+
+
+def get_available_languages(domain):
+    """Lists the available languages for the given translation domain.
+
+    :param domain: the domain to get languages for
+    """
+    if domain in _AVAILABLE_LANGUAGES:
+        return copy.copy(_AVAILABLE_LANGUAGES[domain])
+
+    localedir = '%s_LOCALEDIR' % domain.upper()
+    find = lambda x: gettext.find(domain,
+                                  localedir=os.environ.get(localedir),
+                                  languages=[x])
+
+    # NOTE(mrodden): en_US should always be available (and first in case
+    # order matters) since our in-line message strings are en_US
+    language_list = ['en_US']
+    # NOTE(luisg): Babel <1.0 used a function called list(), which was
+    # renamed to locale_identifiers() in >=1.0, the requirements master list
+    # requires >=0.9.6, uncapped, so defensively work with both. We can remove
+    # this check when the master list updates to >=1.0, and update all projects
+    list_identifiers = (getattr(localedata, 'list', None) or
+                        getattr(localedata, 'locale_identifiers'))
+    locale_identifiers = list_identifiers()
+
+    for i in locale_identifiers:
+        if find(i) is not None:
+            language_list.append(i)
+
+    # NOTE(luisg): Babel>=1.0,<1.3 has a bug where some OpenStack supported
+    # locales (e.g. 'zh_CN', and 'zh_TW') aren't supported even though they
+    # are perfectly legitimate locales:
+    #     https://github.com/mitsuhiko/babel/issues/37
+    # In Babel 1.3 they fixed the bug and they support these locales, but
+    # they are still not explicitly "listed" by locale_identifiers().
+    # That is  why we add the locales here explicitly if necessary so that
+    # they are listed as supported.
+    aliases = {'zh': 'zh_CN',
+               'zh_Hant_HK': 'zh_HK',
+               'zh_Hant': 'zh_TW',
+               'fil': 'tl_PH'}
+    for (locale_, alias) in six.iteritems(aliases):
+        if locale_ in language_list and alias not in language_list:
+            language_list.append(alias)
+
+    _AVAILABLE_LANGUAGES[domain] = language_list
+    return copy.copy(language_list)
+
+
+def translate(obj, desired_locale=None):
+    """Gets the translated unicode representation of the given object.
+
+    If the object is not translatable it is returned as-is.
+    If the locale is None the object is translated to the system locale.
+
+    :param obj: the object to translate
+    :param desired_locale: the locale to translate the message to, if None the
+                           default system locale will be used
+    :returns: the translated object in unicode, or the original object if
+              it could not be translated
+    """
+    message = obj
+    if not isinstance(message, Message):
+        # If the object to translate is not already translatable,
+        # let's first get its unicode representation
+        message = six.text_type(obj)
+    if isinstance(message, Message):
+        # Even after unicoding() we still need to check if we are
+        # running with translatable unicode before translating
+        return message.translate(desired_locale)
+    return obj
+
+
+def _translate_args(args, desired_locale=None):
+    """Translates all the translatable elements of the given arguments object.
+
+    This method is used for translating the translatable values in method
+    arguments which include values of tuples or dictionaries.
+    If the object is not a tuple or a dictionary the object itself is
+    translated if it is translatable.
+
+    If the locale is None the object is translated to the system locale.
+
+    :param args: the args to translate
+    :param desired_locale: the locale to translate the args to, if None the
+                           default system locale will be used
+    :returns: a new args object with the translated contents of the original
+    """
+    if isinstance(args, tuple):
+        return tuple(translate(v, desired_locale) for v in args)
+    if isinstance(args, dict):
+        translated_dict = {}
+        for (k, v) in six.iteritems(args):
+            translated_v = translate(v, desired_locale)
+            translated_dict[k] = translated_v
+        return translated_dict
+    return translate(args, desired_locale)
+
+
+class TranslationHandler(handlers.MemoryHandler):
+    """Handler that translates records before logging them.
+
+    The TranslationHandler takes a locale and a target logging.Handler object
+    to forward LogRecord objects to after translating them. This handler
+    depends on Message objects being logged, instead of regular strings.
+
+    The handler can be configured declaratively in the logging.conf as follows:
+
+        [handlers]
+        keys = translatedlog, translator
+
+        [handler_translatedlog]
+        class = handlers.WatchedFileHandler
+        args = ('/var/log/api-localized.log',)
+        formatter = context
+
+        [handler_translator]
+        class = openstack.common.log.TranslationHandler
+        target = translatedlog
+        args = ('zh_CN',)
+
+    If the specified locale is not available in the system, the handler will
+    log in the default locale.
+    """
+
+    def __init__(self, locale=None, target=None):
+        """Initialize a TranslationHandler
+
+        :param locale: locale to use for translating messages
+        :param target: logging.Handler object to forward
+                       LogRecord objects to after translation
+        """
+        # NOTE(luisg): In order to allow this handler to be a wrapper for
+        # other handlers, such as a FileHandler, and still be able to
+        # configure it using logging.conf, this handler has to extend
+        # MemoryHandler because only the MemoryHandlers' logging.conf
+        # parsing is implemented such that it accepts a target handler.
+        handlers.MemoryHandler.__init__(self, capacity=0, target=target)
+        self.locale = locale
+
+    def setFormatter(self, fmt):
+        self.target.setFormatter(fmt)
+
+    def emit(self, record):
+        # We save the message from the original record to restore it
+        # after translation, so other handlers are not affected by this
+        original_msg = record.msg
+        original_args = record.args
+
+        try:
+            self._translate_and_log_record(record)
+        finally:
+            record.msg = original_msg
+            record.args = original_args
+
+    def _translate_and_log_record(self, record):
+        record.msg = translate(record.msg, self.locale)
+
+        # In addition to translating the message, we also need to translate
+        # arguments that were passed to the log method that were not part
+        # of the main message e.g., log.info(_('Some message %s'), this_one))
+        record.args = _translate_args(record.args, self.locale)
+
+        self.target.emit(record)
diff --git a/oslo/middleware/request_id.py b/oslo/middleware/request_id.py
index e32292c..5ad177a 100644
--- a/oslo/middleware/request_id.py
+++ b/oslo/middleware/request_id.py
@@ -21,8 +21,8 @@ request environment. The request ID is also added to API response.
 
 import webob.dec
 
-from openstack.common import context
 from oslo.middleware import base
+from oslo.middleware.openstack.common import context
 
 
 ENV_REQUEST_ID = 'openstack.request_id'
diff --git a/oslo/middleware/sizelimit.py b/oslo/middleware/sizelimit.py
index 61a242f..23b272f 100644
--- a/oslo/middleware/sizelimit.py
+++ b/oslo/middleware/sizelimit.py
@@ -21,8 +21,8 @@ from oslo.config import cfg
 import webob.dec
 import webob.exc
 
-from openstack.common.gettextutils import _
 from oslo.middleware import base
+from oslo.middleware.openstack.common.gettextutils import _
 
 
 # default request size is 112k
diff --git a/requirements.txt b/requirements.txt
index dbb4dd1..ddb4a4e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,4 @@
-Babel>=0.9.6
\ No newline at end of file
+Babel>=0.9.6
+oslo.config>=1.2.1
+six>=1.7.0
+WebOb>=1.2.3
diff --git a/setup.cfg b/setup.cfg
index 16f14db..2a24ca6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = oslo.middleware
-summary = oslo.middleware library
+summary = Oslo Middleware library
 description-file =
     README.rst
 author = OpenStack
@@ -22,7 +22,6 @@ classifier =
 [files]
 packages =
     oslo
-    oslo.middleware
 namespace_packages =
     oslo
 
diff --git a/setup.py b/setup.py
index 7eeb36b..70c2b3f 100755
--- a/setup.py
+++ b/setup.py
@@ -19,4 +19,4 @@ import setuptools
 
 setuptools.setup(
     setup_requires=['pbr'],
-    pbr=True)
\ No newline at end of file
+    pbr=True)
diff --git a/test-requirements.txt b/test-requirements.txt
index 41eb968..9fec393 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,3 +1,6 @@
-hacking>=0.5.6,<0.8
+fixtures>=0.3.14
+hacking>=0.9.2,<0.10
+mock>=1.0
 oslosphinx
-oslotest
\ No newline at end of file
+oslotest
+testtools>=0.9.34
diff --git a/tests/__init__.py b/tests/__init__.py
index f88664e..e69de29 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,13 +0,0 @@
-# -*- coding: utf-8 -*-
-
-# 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.
\ No newline at end of file
diff --git a/tests/test_catch_errors.py b/tests/test_catch_errors.py
new file mode 100644
index 0000000..a14789d
--- /dev/null
+++ b/tests/test_catch_errors.py
@@ -0,0 +1,47 @@
+# Copyright (c) 2013 NEC Corporation
+# All Rights Reserved.
+#
+#    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 mock
+from oslotest import base as test_base
+import webob.dec
+import webob.exc
+
+from oslo.middleware import catch_errors
+
+
+class CatchErrorsTest(test_base.BaseTestCase):
+
+    def _test_has_request_id(self, application, expected_code=None):
+        app = catch_errors.CatchErrorsMiddleware(application)
+        req = webob.Request.blank('/test')
+        res = req.get_response(app)
+        self.assertEqual(expected_code, res.status_int)
+
+    def test_success_response(self):
+        @webob.dec.wsgify
+        def application(req):
+            return 'Hello, World!!!'
+
+        self._test_has_request_id(application, webob.exc.HTTPOk.code)
+
+    def test_internal_server_error(self):
+        @webob.dec.wsgify
+        def application(req):
+            raise Exception()
+
+        with mock.patch.object(catch_errors.LOG, 'exception') as log_exc:
+            self._test_has_request_id(application,
+                                      webob.exc.HTTPInternalServerError.code)
+            self.assertEqual(1, log_exc.call_count)
diff --git a/tests/test_correlation_id.py b/tests/test_correlation_id.py
new file mode 100644
index 0000000..5248d8f
--- /dev/null
+++ b/tests/test_correlation_id.py
@@ -0,0 +1,53 @@
+# Copyright (c) 2013 Rackspace Hosting
+# All Rights Reserved.
+#
+#    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 uuid
+
+import mock
+from oslotest import base as test_base
+from oslotest import moxstubout
+
+from oslo.middleware import correlation_id
+
+
+class CorrelationIdMiddlewareTest(test_base.BaseTestCase):
+
+    def setUp(self):
+        super(CorrelationIdMiddlewareTest, self).setUp()
+        self.stubs = self.useFixture(moxstubout.MoxStubout()).stubs
+
+    def test_process_request(self):
+        app = mock.Mock()
+        req = mock.Mock()
+        req.headers = {}
+
+        mock_uuid4 = mock.Mock()
+        mock_uuid4.return_value = "fake_uuid"
+        self.stubs.Set(uuid, 'uuid4', mock_uuid4)
+
+        middleware = correlation_id.CorrelationIdMiddleware(app)
+        middleware(req)
+
+        self.assertEqual(req.headers.get("X_CORRELATION_ID"), "fake_uuid")
+
+    def test_process_request_should_not_regenerate_correlation_id(self):
+        app = mock.Mock()
+        req = mock.Mock()
+        req.headers = {"X_CORRELATION_ID": "correlation_id"}
+
+        middleware = correlation_id.CorrelationIdMiddleware(app)
+        middleware(req)
+
+        self.assertEqual(req.headers.get("X_CORRELATION_ID"), "correlation_id")
diff --git a/tests/test_request_id.py b/tests/test_request_id.py
new file mode 100644
index 0000000..c43229b
--- /dev/null
+++ b/tests/test_request_id.py
@@ -0,0 +1,37 @@
+# Copyright (c) 2013 NEC Corporation
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+
+from oslotest import base as test_base
+from testtools import matchers
+import webob
+import webob.dec
+
+from oslo.middleware import request_id
+
+
+class RequestIdTest(test_base.BaseTestCase):
+    def test_generate_request_id(self):
+        @webob.dec.wsgify
+        def application(req):
+            return req.environ[request_id.ENV_REQUEST_ID]
+
+        app = request_id.RequestIdMiddleware(application)
+        req = webob.Request.blank('/test')
+        res = req.get_response(app)
+        res_req_id = res.headers.get(request_id.HTTP_RESP_HEADER_REQUEST_ID)
+        self.assertThat(res_req_id, matchers.StartsWith(b'req-'))
+        # request-id in request environ is returned as response body
+        self.assertEqual(res_req_id, res.body)
diff --git a/tests/test_sizelimit.py b/tests/test_sizelimit.py
new file mode 100644
index 0000000..69516eb
--- /dev/null
+++ b/tests/test_sizelimit.py
@@ -0,0 +1,99 @@
+# Copyright (c) 2012 Red Hat, Inc.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslotest import base as test_base
+import six
+import webob
+
+from oslo.middleware.openstack.common.fixture import config
+from oslo.middleware import sizelimit
+
+
+class TestLimitingReader(test_base.BaseTestCase):
+
+    def test_limiting_reader(self):
+        BYTES = 1024
+        bytes_read = 0
+        data = six.StringIO("*" * BYTES)
+        for chunk in sizelimit.LimitingReader(data, BYTES):
+            bytes_read += len(chunk)
+
+        self.assertEqual(bytes_read, BYTES)
+
+        bytes_read = 0
+        data = six.StringIO("*" * BYTES)
+        reader = sizelimit.LimitingReader(data, BYTES)
+        byte = reader.read(1)
+        while len(byte) != 0:
+            bytes_read += 1
+            byte = reader.read(1)
+
+        self.assertEqual(bytes_read, BYTES)
+
+    def test_limiting_reader_fails(self):
+        BYTES = 1024
+
+        def _consume_all_iter():
+            bytes_read = 0
+            data = six.StringIO("*" * BYTES)
+            for chunk in sizelimit.LimitingReader(data, BYTES - 1):
+                bytes_read += len(chunk)
+
+        self.assertRaises(webob.exc.HTTPRequestEntityTooLarge,
+                          _consume_all_iter)
+
+        def _consume_all_read():
+            bytes_read = 0
+            data = six.StringIO("*" * BYTES)
+            reader = sizelimit.LimitingReader(data, BYTES - 1)
+            byte = reader.read(1)
+            while len(byte) != 0:
+                bytes_read += 1
+                byte = reader.read(1)
+
+        self.assertRaises(webob.exc.HTTPRequestEntityTooLarge,
+                          _consume_all_read)
+
+
+class TestRequestBodySizeLimiter(test_base.BaseTestCase):
+
+    def setUp(self):
+        super(TestRequestBodySizeLimiter, self).setUp()
+        self.MAX_REQUEST_BODY_SIZE = \
+            self.useFixture(config.Config()).conf.max_request_body_size
+
+        @webob.dec.wsgify()
+        def fake_app(req):
+            return webob.Response(req.body)
+
+        self.middleware = sizelimit.RequestBodySizeLimiter(fake_app)
+        self.request = webob.Request.blank('/', method='POST')
+
+    def test_content_length_acceptable(self):
+        self.request.headers['Content-Length'] = self.MAX_REQUEST_BODY_SIZE
+        self.request.body = b"0" * self.MAX_REQUEST_BODY_SIZE
+        response = self.request.get_response(self.middleware)
+        self.assertEqual(response.status_int, 200)
+
+    def test_content_length_too_large(self):
+        self.request.headers['Content-Length'] = self.MAX_REQUEST_BODY_SIZE + 1
+        self.request.body = b"0" * (self.MAX_REQUEST_BODY_SIZE + 1)
+        response = self.request.get_response(self.middleware)
+        self.assertEqual(response.status_int, 413)
+
+    def test_request_too_large_no_content_length(self):
+        self.request.body = b"0" * (self.MAX_REQUEST_BODY_SIZE + 1)
+        self.request.headers['Content-Length'] = None
+        response = self.request.get_response(self.middleware)
+        self.assertEqual(response.status_int, 413)
diff --git a/tools/run_cross_tests.sh b/tools/run_cross_tests.sh
new file mode 100755
index 0000000..5e7bc11
--- /dev/null
+++ b/tools/run_cross_tests.sh
@@ -0,0 +1,91 @@
+#!/bin/bash
+#
+# Run cross-project tests
+#
+# Usage:
+#
+#   run_cross_tests.sh project_dir venv
+
+# Fail the build if any command fails
+set -e
+
+project_dir="$1"
+venv="$2"
+
+if [ -z "$project_dir" -o -z "$venv" ]
+then
+    cat - <<EOF
+ERROR: Missing argument(s)
+
+Usage:
+
+  $0 PROJECT_DIR VIRTUAL_ENV
+
+Example, run the python 2.7 tests for python-neutronclient:
+
+  $0 /opt/stack/python-neutronclient py27
+
+EOF
+    exit 1
+fi
+
+# Set up the virtualenv without running the tests
+(cd $project_dir && tox --notest -e $venv)
+
+tox_envbin=$project_dir/.tox/$venv/bin
+
+our_name=$(python setup.py --name)
+
+# Replace the pip-installed package with the version in our source
+# tree. Look to see if we are already installed before trying to
+# uninstall ourselves, to avoid failures from packages that do not use us
+# yet.
+if $tox_envbin/pip freeze | grep -q $our_name
+then
+    $tox_envbin/pip uninstall -y $our_name
+fi
+$tox_envbin/pip install -U .
+
+# Run the tests
+(cd $project_dir && tox -e $venv)
+result=$?
+
+
+# The below checks are modified from
+# openstack-infra/config/modules/jenkins/files/slave_scripts/run-unittests.sh.
+
+# They expect to be run in the project being tested.
+cd $project_dir
+
+echo "Begin pip freeze output from test virtualenv:"
+echo "======================================================================"
+.tox/$venv/bin/pip freeze
+echo "======================================================================"
+
+# We only want to run the next check if the tool is installed, so look
+# for it before continuing.
+if [ -f /usr/local/jenkins/slave_scripts/subunit2html.py -a -d ".testrepository" ] ; then
+    if [ -f ".testrepository/0.2" ] ; then
+        cp .testrepository/0.2 ./subunit_log.txt
+    elif [ -f ".testrepository/0" ] ; then
+        .tox/$venv/bin/subunit-1to2 < .testrepository/0 > ./subunit_log.txt
+    fi
+    .tox/$venv/bin/python /usr/local/jenkins/slave_scripts/subunit2html.py ./subunit_log.txt testr_results.html
+    gzip -9 ./subunit_log.txt
+    gzip -9 ./testr_results.html
+
+    export PYTHON=.tox/$venv/bin/python
+    set -e
+    rancount=$(.tox/$venv/bin/testr last | sed -ne 's/Ran \([0-9]\+\).*tests in.*/\1/p')
+    if [ "$rancount" -eq "0" ] ; then
+        echo
+        echo "Zero tests were run. At least one test should have been run."
+        echo "Failing this test as a result"
+        echo
+        exit 1
+    fi
+fi
+
+# If we make it this far, report status based on the tests that were
+# run.
+exit $result
diff --git a/tox.ini b/tox.ini
index 83f4dac..07e7f46 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,6 +30,6 @@ commands = python setup.py testr --coverage --testr-args='{posargs}'
 # E123, E125 skipped as they are invalid PEP-8.
 
 show-source = True
-ignore = E123,E125,H803
+ignore = E123,E125,H803,H305
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build
\ No newline at end of file