diff --git a/congressclient/openstack/__init__.py b/congressclient/openstack/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/congressclient/openstack/common/__init__.py b/congressclient/openstack/common/__init__.py new file mode 100644 index 0000000..d1223ea --- /dev/null +++ b/congressclient/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/congressclient/openstack/common/apiclient/__init__.py b/congressclient/openstack/common/apiclient/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/congressclient/openstack/common/apiclient/auth.py b/congressclient/openstack/common/apiclient/auth.py new file mode 100644 index 0000000..df56682 --- /dev/null +++ b/congressclient/openstack/common/apiclient/auth.py @@ -0,0 +1,221 @@ +# Copyright 2013 OpenStack Foundation +# Copyright 2013 Spanish National Research Council. +# 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. + +# E0202: An attribute inherited from %s hide this method +# pylint: disable=E0202 + +import abc +import argparse +import os + +import six +from stevedore import extension + +from congressclient.openstack.common.apiclient import exceptions + + +_discovered_plugins = {} + + +def discover_auth_systems(): + """Discover the available auth-systems. + + This won't take into account the old style auth-systems. + """ + global _discovered_plugins + _discovered_plugins = {} + + def add_plugin(ext): + _discovered_plugins[ext.name] = ext.plugin + + ep_namespace = "congressclient.openstack.common.apiclient.auth" + mgr = extension.ExtensionManager(ep_namespace) + mgr.map(add_plugin) + + +def load_auth_system_opts(parser): + """Load options needed by the available auth-systems into a parser. + + This function will try to populate the parser with options from the + available plugins. + """ + group = parser.add_argument_group("Common auth options") + BaseAuthPlugin.add_common_opts(group) + for name, auth_plugin in six.iteritems(_discovered_plugins): + group = parser.add_argument_group( + "Auth-system '%s' options" % name, + conflict_handler="resolve") + auth_plugin.add_opts(group) + + +def load_plugin(auth_system): + try: + plugin_class = _discovered_plugins[auth_system] + except KeyError: + raise exceptions.AuthSystemNotFound(auth_system) + return plugin_class(auth_system=auth_system) + + +def load_plugin_from_args(args): + """Load required plugin and populate it with options. + + Try to guess auth system if it is not specified. Systems are tried in + alphabetical order. + + :type args: argparse.Namespace + :raises: AuthPluginOptionsMissing + """ + auth_system = args.os_auth_system + if auth_system: + plugin = load_plugin(auth_system) + plugin.parse_opts(args) + plugin.sufficient_options() + return plugin + + for plugin_auth_system in sorted(six.iterkeys(_discovered_plugins)): + plugin_class = _discovered_plugins[plugin_auth_system] + plugin = plugin_class() + plugin.parse_opts(args) + try: + plugin.sufficient_options() + except exceptions.AuthPluginOptionsMissing: + continue + return plugin + raise exceptions.AuthPluginOptionsMissing(["auth_system"]) + + +@six.add_metaclass(abc.ABCMeta) +class BaseAuthPlugin(object): + """Base class for authentication plugins. + + An authentication plugin needs to override at least the authenticate + method to be a valid plugin. + """ + + auth_system = None + opt_names = [] + common_opt_names = [ + "auth_system", + "username", + "password", + "tenant_name", + "token", + "auth_url", + ] + + def __init__(self, auth_system=None, **kwargs): + self.auth_system = auth_system or self.auth_system + self.opts = dict((name, kwargs.get(name)) + for name in self.opt_names) + + @staticmethod + def _parser_add_opt(parser, opt): + """Add an option to parser in two variants. + + :param opt: option name (with underscores) + """ + dashed_opt = opt.replace("_", "-") + env_var = "OS_%s" % opt.upper() + arg_default = os.environ.get(env_var, "") + arg_help = "Defaults to env[%s]." % env_var + parser.add_argument( + "--os-%s" % dashed_opt, + metavar="<%s>" % dashed_opt, + default=arg_default, + help=arg_help) + parser.add_argument( + "--os_%s" % opt, + metavar="<%s>" % dashed_opt, + help=argparse.SUPPRESS) + + @classmethod + def add_opts(cls, parser): + """Populate the parser with the options for this plugin. + """ + for opt in cls.opt_names: + # use `BaseAuthPlugin.common_opt_names` since it is never + # changed in child classes + if opt not in BaseAuthPlugin.common_opt_names: + cls._parser_add_opt(parser, opt) + + @classmethod + def add_common_opts(cls, parser): + """Add options that are common for several plugins. + """ + for opt in cls.common_opt_names: + cls._parser_add_opt(parser, opt) + + @staticmethod + def get_opt(opt_name, args): + """Return option name and value. + + :param opt_name: name of the option, e.g., "username" + :param args: parsed arguments + """ + return (opt_name, getattr(args, "os_%s" % opt_name, None)) + + def parse_opts(self, args): + """Parse the actual auth-system options if any. + + This method is expected to populate the attribute `self.opts` with a + dict containing the options and values needed to make authentication. + """ + self.opts.update(dict(self.get_opt(opt_name, args) + for opt_name in self.opt_names)) + + def authenticate(self, http_client): + """Authenticate using plugin defined method. + + The method usually analyses `self.opts` and performs + a request to authentication server. + + :param http_client: client object that needs authentication + :type http_client: HTTPClient + :raises: AuthorizationFailure + """ + self.sufficient_options() + self._do_authenticate(http_client) + + @abc.abstractmethod + def _do_authenticate(self, http_client): + """Protected method for authentication. + """ + + def sufficient_options(self): + """Check if all required options are present. + + :raises: AuthPluginOptionsMissing + """ + missing = [opt + for opt in self.opt_names + if not self.opts.get(opt)] + if missing: + raise exceptions.AuthPluginOptionsMissing(missing) + + @abc.abstractmethod + def token_and_endpoint(self, endpoint_type, service_type): + """Return token and endpoint. + + :param service_type: Service type of the endpoint + :type service_type: string + :param endpoint_type: Type of endpoint. + Possible values: public or publicURL, + internal or internalURL, + admin or adminURL + :type endpoint_type: string + :returns: tuple of token and endpoint strings + :raises: EndpointException + """ diff --git a/congressclient/openstack/common/apiclient/base.py b/congressclient/openstack/common/apiclient/base.py new file mode 100644 index 0000000..c4da3c7 --- /dev/null +++ b/congressclient/openstack/common/apiclient/base.py @@ -0,0 +1,516 @@ +# Copyright 2010 Jacob Kaplan-Moss +# Copyright 2011 OpenStack Foundation +# Copyright 2012 Grid Dynamics +# 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. + +""" +Base utilities to build API operation managers and objects on top of. +""" + +# E1102: %s is not callable +# pylint: disable=E1102 + +import abc +import copy + +import six +from six.moves.urllib import parse + +from congressclient.openstack.common.apiclient import exceptions +from congressclient.openstack.common.gettextutils import _ +from congressclient.openstack.common import strutils + + +def getid(obj): + """Return id if argument is a Resource. + + Abstracts the common pattern of allowing both an object or an object's ID + (UUID) as a parameter when dealing with relationships. + """ + try: + if obj.uuid: + return obj.uuid + except AttributeError: + pass + try: + return obj.id + except AttributeError: + return obj + + +# TODO(aababilov): call run_hooks() in HookableMixin's child classes +class HookableMixin(object): + """Mixin so classes can register and run hooks.""" + _hooks_map = {} + + @classmethod + def add_hook(cls, hook_type, hook_func): + """Add a new hook of specified type. + + :param cls: class that registers hooks + :param hook_type: hook type, e.g., '__pre_parse_args__' + :param hook_func: hook function + """ + if hook_type not in cls._hooks_map: + cls._hooks_map[hook_type] = [] + + cls._hooks_map[hook_type].append(hook_func) + + @classmethod + def run_hooks(cls, hook_type, *args, **kwargs): + """Run all hooks of specified type. + + :param cls: class that registers hooks + :param hook_type: hook type, e.g., '__pre_parse_args__' + :param args: args to be passed to every hook function + :param kwargs: kwargs to be passed to every hook function + """ + hook_funcs = cls._hooks_map.get(hook_type) or [] + for hook_func in hook_funcs: + hook_func(*args, **kwargs) + + +class BaseManager(HookableMixin): + """Basic manager type providing common operations. + + Managers interact with a particular type of API (servers, flavors, images, + etc.) and provide CRUD operations for them. + """ + resource_class = None + + def __init__(self, client): + """Initializes BaseManager with `client`. + + :param client: instance of BaseClient descendant for HTTP requests + """ + super(BaseManager, self).__init__() + self.client = client + + def _list(self, url, response_key=None, obj_class=None, json=None): + """List the collection. + + :param url: a partial URL, e.g., '/servers' + :param response_key: the key to be looked up in response dictionary, + e.g., 'servers'. If response_key is None - all response body + will be used. + :param obj_class: class for constructing the returned objects + (self.resource_class will be used by default) + :param json: data that will be encoded as JSON and passed in POST + request (GET will be sent by default) + """ + if json: + body = self.client.post(url, json=json).json() + else: + body = self.client.get(url).json() + + if obj_class is None: + obj_class = self.resource_class + + data = body[response_key] if response_key is not None else body + # NOTE(ja): keystone returns values as list as {'values': [ ... ]} + # unlike other services which just return the list... + try: + data = data['values'] + except (KeyError, TypeError): + pass + + return [obj_class(self, res, loaded=True) for res in data if res] + + def _get(self, url, response_key=None): + """Get an object from collection. + + :param url: a partial URL, e.g., '/servers' + :param response_key: the key to be looked up in response dictionary, + e.g., 'server'. If response_key is None - all response body + will be used. + """ + body = self.client.get(url).json() + data = body[response_key] if response_key is not None else body + return self.resource_class(self, data, loaded=True) + + def _head(self, url): + """Retrieve request headers for an object. + + :param url: a partial URL, e.g., '/servers' + """ + resp = self.client.head(url) + return resp.status_code == 204 + + def _post(self, url, json, response_key=None, return_raw=False): + """Create an object. + + :param url: a partial URL, e.g., '/servers' + :param json: data that will be encoded as JSON and passed in POST + request (GET will be sent by default) + :param response_key: the key to be looked up in response dictionary, + e.g., 'server'. If response_key is None - all response body + will be used. + :param return_raw: flag to force returning raw JSON instead of + Python object of self.resource_class + """ + body = self.client.post(url, json=json).json() + data = body[response_key] if response_key is not None else body + if return_raw: + return data + return self.resource_class(self, data) + + def _put(self, url, json=None, response_key=None): + """Update an object with PUT method. + + :param url: a partial URL, e.g., '/servers' + :param json: data that will be encoded as JSON and passed in POST + request (GET will be sent by default) + :param response_key: the key to be looked up in response dictionary, + e.g., 'servers'. If response_key is None - all response body + will be used. + """ + resp = self.client.put(url, json=json) + # PUT requests may not return a body + if resp.content: + body = resp.json() + if response_key is not None: + return self.resource_class(self, body[response_key]) + else: + return self.resource_class(self, body) + + def _patch(self, url, json=None, response_key=None): + """Update an object with PATCH method. + + :param url: a partial URL, e.g., '/servers' + :param json: data that will be encoded as JSON and passed in POST + request (GET will be sent by default) + :param response_key: the key to be looked up in response dictionary, + e.g., 'servers'. If response_key is None - all response body + will be used. + """ + body = self.client.patch(url, json=json).json() + if response_key is not None: + return self.resource_class(self, body[response_key]) + else: + return self.resource_class(self, body) + + def _delete(self, url): + """Delete an object. + + :param url: a partial URL, e.g., '/servers/my-server' + """ + return self.client.delete(url) + + +@six.add_metaclass(abc.ABCMeta) +class ManagerWithFind(BaseManager): + """Manager with additional `find()`/`findall()` methods.""" + + @abc.abstractmethod + def list(self): + pass + + def find(self, **kwargs): + """Find a single item with attributes matching ``**kwargs``. + + This isn't very efficient: it loads the entire list then filters on + the Python side. + """ + matches = self.findall(**kwargs) + num_matches = len(matches) + if num_matches == 0: + msg = _("No %(name)s matching %(args)s.") % { + 'name': self.resource_class.__name__, + 'args': kwargs + } + raise exceptions.NotFound(msg) + elif num_matches > 1: + raise exceptions.NoUniqueMatch() + else: + return matches[0] + + def findall(self, **kwargs): + """Find all items with attributes matching ``**kwargs``. + + This isn't very efficient: it loads the entire list then filters on + the Python side. + """ + found = [] + searches = kwargs.items() + + for obj in self.list(): + try: + if all(getattr(obj, attr) == value + for (attr, value) in searches): + found.append(obj) + except AttributeError: + continue + + return found + + +class CrudManager(BaseManager): + """Base manager class for manipulating entities. + + Children of this class are expected to define a `collection_key` and `key`. + + - `collection_key`: Usually a plural noun by convention (e.g. `entities`); + used to refer collections in both URL's (e.g. `/v3/entities`) and JSON + objects containing a list of member resources (e.g. `{'entities': [{}, + {}, {}]}`). + - `key`: Usually a singular noun by convention (e.g. `entity`); used to + refer to an individual member of the collection. + + """ + collection_key = None + key = None + + def build_url(self, base_url=None, **kwargs): + """Builds a resource URL for the given kwargs. + + Given an example collection where `collection_key = 'entities'` and + `key = 'entity'`, the following URL's could be generated. + + By default, the URL will represent a collection of entities, e.g.:: + + /entities + + If kwargs contains an `entity_id`, then the URL will represent a + specific member, e.g.:: + + /entities/{entity_id} + + :param base_url: if provided, the generated URL will be appended to it + """ + url = base_url if base_url is not None else '' + + url += '/%s' % self.collection_key + + # do we have a specific entity? + entity_id = kwargs.get('%s_id' % self.key) + if entity_id is not None: + url += '/%s' % entity_id + + return url + + def _filter_kwargs(self, kwargs): + """Drop null values and handle ids.""" + for key, ref in six.iteritems(kwargs.copy()): + if ref is None: + kwargs.pop(key) + else: + if isinstance(ref, Resource): + kwargs.pop(key) + kwargs['%s_id' % key] = getid(ref) + return kwargs + + def create(self, **kwargs): + kwargs = self._filter_kwargs(kwargs) + return self._post( + self.build_url(**kwargs), + {self.key: kwargs}, + self.key) + + def get(self, **kwargs): + kwargs = self._filter_kwargs(kwargs) + return self._get( + self.build_url(**kwargs), + self.key) + + def head(self, **kwargs): + kwargs = self._filter_kwargs(kwargs) + return self._head(self.build_url(**kwargs)) + + def list(self, base_url=None, **kwargs): + """List the collection. + + :param base_url: if provided, the generated URL will be appended to it + """ + kwargs = self._filter_kwargs(kwargs) + + return self._list( + '%(base_url)s%(query)s' % { + 'base_url': self.build_url(base_url=base_url, **kwargs), + 'query': '?%s' % parse.urlencode(kwargs) if kwargs else '', + }, + self.collection_key) + + def put(self, base_url=None, **kwargs): + """Update an element. + + :param base_url: if provided, the generated URL will be appended to it + """ + kwargs = self._filter_kwargs(kwargs) + + return self._put(self.build_url(base_url=base_url, **kwargs)) + + def update(self, **kwargs): + kwargs = self._filter_kwargs(kwargs) + params = kwargs.copy() + params.pop('%s_id' % self.key) + + return self._patch( + self.build_url(**kwargs), + {self.key: params}, + self.key) + + def delete(self, **kwargs): + kwargs = self._filter_kwargs(kwargs) + + return self._delete( + self.build_url(**kwargs)) + + def find(self, base_url=None, **kwargs): + """Find a single item with attributes matching ``**kwargs``. + + :param base_url: if provided, the generated URL will be appended to it + """ + kwargs = self._filter_kwargs(kwargs) + + rl = self._list( + '%(base_url)s%(query)s' % { + 'base_url': self.build_url(base_url=base_url, **kwargs), + 'query': '?%s' % parse.urlencode(kwargs) if kwargs else '', + }, + self.collection_key) + num = len(rl) + + if num == 0: + msg = _("No %(name)s matching %(args)s.") % { + 'name': self.resource_class.__name__, + 'args': kwargs + } + raise exceptions.NotFound(404, msg) + elif num > 1: + raise exceptions.NoUniqueMatch + else: + return rl[0] + + +class Extension(HookableMixin): + """Extension descriptor.""" + + SUPPORTED_HOOKS = ('__pre_parse_args__', '__post_parse_args__') + manager_class = None + + def __init__(self, name, module): + super(Extension, self).__init__() + self.name = name + self.module = module + self._parse_extension_module() + + def _parse_extension_module(self): + self.manager_class = None + for attr_name, attr_value in self.module.__dict__.items(): + if attr_name in self.SUPPORTED_HOOKS: + self.add_hook(attr_name, attr_value) + else: + try: + if issubclass(attr_value, BaseManager): + self.manager_class = attr_value + except TypeError: + pass + + def __repr__(self): + return "" % self.name + + +class Resource(object): + """Base class for OpenStack resources (tenant, user, etc.). + + This is pretty much just a bag for attributes. + """ + + HUMAN_ID = False + NAME_ATTR = 'name' + + def __init__(self, manager, info, loaded=False): + """Populate and bind to a manager. + + :param manager: BaseManager object + :param info: dictionary representing resource attributes + :param loaded: prevent lazy-loading if set to True + """ + self.manager = manager + self._info = info + self._add_details(info) + self._loaded = loaded + + def __repr__(self): + reprkeys = sorted(k + for k in self.__dict__.keys() + if k[0] != '_' and k != 'manager') + info = ", ".join("%s=%s" % (k, getattr(self, k)) for k in reprkeys) + return "<%s %s>" % (self.__class__.__name__, info) + + @property + def human_id(self): + """Human-readable ID which can be used for bash completion. + """ + if self.HUMAN_ID: + name = getattr(self, self.NAME_ATTR, None) + if name is not None: + return strutils.to_slug(name) + return None + + def _add_details(self, info): + for (k, v) in six.iteritems(info): + try: + setattr(self, k, v) + self._info[k] = v + except AttributeError: + # In this case we already defined the attribute on the class + pass + + def __getattr__(self, k): + if k not in self.__dict__: + # NOTE(bcwaldon): disallow lazy-loading if already loaded once + if not self.is_loaded(): + self.get() + return self.__getattr__(k) + + raise AttributeError(k) + else: + return self.__dict__[k] + + def get(self): + """Support for lazy loading details. + + Some clients, such as novaclient have the option to lazy load the + details, details which can be loaded with this function. + """ + # set_loaded() first ... so if we have to bail, we know we tried. + self.set_loaded(True) + if not hasattr(self.manager, 'get'): + return + + new = self.manager.get(self.id) + if new: + self._add_details(new._info) + + def __eq__(self, other): + if not isinstance(other, Resource): + return NotImplemented + # two resources of different types are not equal + if not isinstance(other, self.__class__): + return False + if hasattr(self, 'id') and hasattr(other, 'id'): + return self.id == other.id + return self._info == other._info + + def is_loaded(self): + return self._loaded + + def set_loaded(self, val): + self._loaded = val + + def to_dict(self): + return copy.deepcopy(self._info) diff --git a/congressclient/openstack/common/apiclient/client.py b/congressclient/openstack/common/apiclient/client.py new file mode 100644 index 0000000..0149f78 --- /dev/null +++ b/congressclient/openstack/common/apiclient/client.py @@ -0,0 +1,363 @@ +# Copyright 2010 Jacob Kaplan-Moss +# Copyright 2011 OpenStack Foundation +# Copyright 2011 Piston Cloud Computing, Inc. +# Copyright 2013 Alessio Ababilov +# Copyright 2013 Grid Dynamics +# 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. + +""" +OpenStack Client interface. Handles the REST calls and responses. +""" + +# E0202: An attribute inherited from %s hide this method +# pylint: disable=E0202 + +import logging +import time + +try: + import simplejson as json +except ImportError: + import json + +import requests + +from congressclient.openstack.common.apiclient import exceptions +from congressclient.openstack.common.gettextutils import _ +from congressclient.openstack.common import importutils + + +_logger = logging.getLogger(__name__) + + +class HTTPClient(object): + """This client handles sending HTTP requests to OpenStack servers. + + Features: + + - share authentication information between several clients to different + services (e.g., for compute and image clients); + - reissue authentication request for expired tokens; + - encode/decode JSON bodies; + - raise exceptions on HTTP errors; + - pluggable authentication; + - store authentication information in a keyring; + - store time spent for requests; + - register clients for particular services, so one can use + `http_client.identity` or `http_client.compute`; + - log requests and responses in a format that is easy to copy-and-paste + into terminal and send the same request with curl. + """ + + user_agent = "congressclient.openstack.common.apiclient" + + def __init__(self, + auth_plugin, + region_name=None, + endpoint_type="publicURL", + original_ip=None, + verify=True, + cert=None, + timeout=None, + timings=False, + keyring_saver=None, + debug=False, + user_agent=None, + http=None): + self.auth_plugin = auth_plugin + + self.endpoint_type = endpoint_type + self.region_name = region_name + + self.original_ip = original_ip + self.timeout = timeout + self.verify = verify + self.cert = cert + + self.keyring_saver = keyring_saver + self.debug = debug + self.user_agent = user_agent or self.user_agent + + self.times = [] # [("item", starttime, endtime), ...] + self.timings = timings + + # requests within the same session can reuse TCP connections from pool + self.http = http or requests.Session() + + self.cached_token = None + + def _http_log_req(self, method, url, kwargs): + if not self.debug: + return + + string_parts = [ + "curl -i", + "-X '%s'" % method, + "'%s'" % url, + ] + + for element in kwargs['headers']: + header = "-H '%s: %s'" % (element, kwargs['headers'][element]) + string_parts.append(header) + + _logger.debug("REQ: %s" % " ".join(string_parts)) + if 'data' in kwargs: + _logger.debug("REQ BODY: %s\n" % (kwargs['data'])) + + def _http_log_resp(self, resp): + if not self.debug: + return + _logger.debug( + "RESP: [%s] %s\n", + resp.status_code, + resp.headers) + if resp._content_consumed: + _logger.debug( + "RESP BODY: %s\n", + resp.text) + + def serialize(self, kwargs): + if kwargs.get('json') is not None: + kwargs['headers']['Content-Type'] = 'application/json' + kwargs['data'] = json.dumps(kwargs['json']) + try: + del kwargs['json'] + except KeyError: + pass + + def get_timings(self): + return self.times + + def reset_timings(self): + self.times = [] + + def request(self, method, url, **kwargs): + """Send an http request with the specified characteristics. + + Wrapper around `requests.Session.request` to handle tasks such as + setting headers, JSON encoding/decoding, and error handling. + + :param method: method of HTTP request + :param url: URL of HTTP request + :param kwargs: any other parameter that can be passed to + requests.Session.request (such as `headers`) or `json` + that will be encoded as JSON and used as `data` argument + """ + kwargs.setdefault("headers", kwargs.get("headers", {})) + kwargs["headers"]["User-Agent"] = self.user_agent + if self.original_ip: + kwargs["headers"]["Forwarded"] = "for=%s;by=%s" % ( + self.original_ip, self.user_agent) + if self.timeout is not None: + kwargs.setdefault("timeout", self.timeout) + kwargs.setdefault("verify", self.verify) + if self.cert is not None: + kwargs.setdefault("cert", self.cert) + self.serialize(kwargs) + + self._http_log_req(method, url, kwargs) + if self.timings: + start_time = time.time() + resp = self.http.request(method, url, **kwargs) + if self.timings: + self.times.append(("%s %s" % (method, url), + start_time, time.time())) + self._http_log_resp(resp) + + if resp.status_code >= 400: + _logger.debug( + "Request returned failure status: %s", + resp.status_code) + raise exceptions.from_response(resp, method, url) + + return resp + + @staticmethod + def concat_url(endpoint, url): + """Concatenate endpoint and final URL. + + E.g., "http://keystone/v2.0/" and "/tokens" are concatenated to + "http://keystone/v2.0/tokens". + + :param endpoint: the base URL + :param url: the final URL + """ + return "%s/%s" % (endpoint.rstrip("/"), url.strip("/")) + + def client_request(self, client, method, url, **kwargs): + """Send an http request using `client`'s endpoint and specified `url`. + + If request was rejected as unauthorized (possibly because the token is + expired), issue one authorization attempt and send the request once + again. + + :param client: instance of BaseClient descendant + :param method: method of HTTP request + :param url: URL of HTTP request + :param kwargs: any other parameter that can be passed to + `HTTPClient.request` + """ + + filter_args = { + "endpoint_type": client.endpoint_type or self.endpoint_type, + "service_type": client.service_type, + } + token, endpoint = (self.cached_token, client.cached_endpoint) + just_authenticated = False + if not (token and endpoint): + try: + token, endpoint = self.auth_plugin.token_and_endpoint( + **filter_args) + except exceptions.EndpointException: + pass + if not (token and endpoint): + self.authenticate() + just_authenticated = True + token, endpoint = self.auth_plugin.token_and_endpoint( + **filter_args) + if not (token and endpoint): + raise exceptions.AuthorizationFailure( + _("Cannot find endpoint or token for request")) + + old_token_endpoint = (token, endpoint) + kwargs.setdefault("headers", {})["X-Auth-Token"] = token + self.cached_token = token + client.cached_endpoint = endpoint + # Perform the request once. If we get Unauthorized, then it + # might be because the auth token expired, so try to + # re-authenticate and try again. If it still fails, bail. + try: + return self.request( + method, self.concat_url(endpoint, url), **kwargs) + except exceptions.Unauthorized as unauth_ex: + if just_authenticated: + raise + self.cached_token = None + client.cached_endpoint = None + self.authenticate() + try: + token, endpoint = self.auth_plugin.token_and_endpoint( + **filter_args) + except exceptions.EndpointException: + raise unauth_ex + if (not (token and endpoint) or + old_token_endpoint == (token, endpoint)): + raise unauth_ex + self.cached_token = token + client.cached_endpoint = endpoint + kwargs["headers"]["X-Auth-Token"] = token + return self.request( + method, self.concat_url(endpoint, url), **kwargs) + + def add_client(self, base_client_instance): + """Add a new instance of :class:`BaseClient` descendant. + + `self` will store a reference to `base_client_instance`. + + Example: + + >>> def test_clients(): + ... from keystoneclient.auth import keystone + ... from openstack.common.apiclient import client + ... auth = keystone.KeystoneAuthPlugin( + ... username="user", password="pass", tenant_name="tenant", + ... auth_url="http://auth:5000/v2.0") + ... openstack_client = client.HTTPClient(auth) + ... # create nova client + ... from novaclient.v1_1 import client + ... client.Client(openstack_client) + ... # create keystone client + ... from keystoneclient.v2_0 import client + ... client.Client(openstack_client) + ... # use them + ... openstack_client.identity.tenants.list() + ... openstack_client.compute.servers.list() + """ + service_type = base_client_instance.service_type + if service_type and not hasattr(self, service_type): + setattr(self, service_type, base_client_instance) + + def authenticate(self): + self.auth_plugin.authenticate(self) + # Store the authentication results in the keyring for later requests + if self.keyring_saver: + self.keyring_saver.save(self) + + +class BaseClient(object): + """Top-level object to access the OpenStack API. + + This client uses :class:`HTTPClient` to send requests. :class:`HTTPClient` + will handle a bunch of issues such as authentication. + """ + + service_type = None + endpoint_type = None # "publicURL" will be used + cached_endpoint = None + + def __init__(self, http_client, extensions=None): + self.http_client = http_client + http_client.add_client(self) + + # Add in any extensions... + if extensions: + for extension in extensions: + if extension.manager_class: + setattr(self, extension.name, + extension.manager_class(self)) + + def client_request(self, method, url, **kwargs): + return self.http_client.client_request( + self, method, url, **kwargs) + + def head(self, url, **kwargs): + return self.client_request("HEAD", url, **kwargs) + + def get(self, url, **kwargs): + return self.client_request("GET", url, **kwargs) + + def post(self, url, **kwargs): + return self.client_request("POST", url, **kwargs) + + def put(self, url, **kwargs): + return self.client_request("PUT", url, **kwargs) + + def delete(self, url, **kwargs): + return self.client_request("DELETE", url, **kwargs) + + def patch(self, url, **kwargs): + return self.client_request("PATCH", url, **kwargs) + + @staticmethod + def get_class(api_name, version, version_map): + """Returns the client class for the requested API version + + :param api_name: the name of the API, e.g. 'compute', 'image', etc + :param version: the requested API version + :param version_map: a dict of client classes keyed by version + :rtype: a client class for the requested API version + """ + try: + client_path = version_map[str(version)] + except (KeyError, ValueError): + msg = _("Invalid %(api_name)s client version '%(version)s'. " + "Must be one of: %(version_map)s") % { + 'api_name': api_name, + 'version': version, + 'version_map': ', '.join(version_map.keys())} + raise exceptions.UnsupportedVersion(msg) + + return importutils.import_class(client_path) diff --git a/congressclient/openstack/common/apiclient/exceptions.py b/congressclient/openstack/common/apiclient/exceptions.py new file mode 100644 index 0000000..9b68419 --- /dev/null +++ b/congressclient/openstack/common/apiclient/exceptions.py @@ -0,0 +1,466 @@ +# Copyright 2010 Jacob Kaplan-Moss +# Copyright 2011 Nebula, Inc. +# Copyright 2013 Alessio Ababilov +# 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. + +""" +Exception definitions. +""" + +import inspect +import sys + +import six + +from congressclient.openstack.common.gettextutils import _ + + +class ClientException(Exception): + """The base exception class for all exceptions this library raises. + """ + pass + + +class MissingArgs(ClientException): + """Supplied arguments are not sufficient for calling a function.""" + def __init__(self, missing): + self.missing = missing + msg = _("Missing arguments: %s") % ", ".join(missing) + super(MissingArgs, self).__init__(msg) + + +class ValidationError(ClientException): + """Error in validation on API client side.""" + pass + + +class UnsupportedVersion(ClientException): + """User is trying to use an unsupported version of the API.""" + pass + + +class CommandError(ClientException): + """Error in CLI tool.""" + pass + + +class AuthorizationFailure(ClientException): + """Cannot authorize API client.""" + pass + + +class ConnectionRefused(ClientException): + """Cannot connect to API service.""" + pass + + +class AuthPluginOptionsMissing(AuthorizationFailure): + """Auth plugin misses some options.""" + def __init__(self, opt_names): + super(AuthPluginOptionsMissing, self).__init__( + _("Authentication failed. Missing options: %s") % + ", ".join(opt_names)) + self.opt_names = opt_names + + +class AuthSystemNotFound(AuthorizationFailure): + """User has specified an AuthSystem that is not installed.""" + def __init__(self, auth_system): + super(AuthSystemNotFound, self).__init__( + _("AuthSystemNotFound: %s") % repr(auth_system)) + self.auth_system = auth_system + + +class NoUniqueMatch(ClientException): + """Multiple entities found instead of one.""" + pass + + +class EndpointException(ClientException): + """Something is rotten in Service Catalog.""" + pass + + +class EndpointNotFound(EndpointException): + """Could not find requested endpoint in Service Catalog.""" + pass + + +class AmbiguousEndpoints(EndpointException): + """Found more than one matching endpoint in Service Catalog.""" + def __init__(self, endpoints=None): + super(AmbiguousEndpoints, self).__init__( + _("AmbiguousEndpoints: %s") % repr(endpoints)) + self.endpoints = endpoints + + +class HttpError(ClientException): + """The base exception class for all HTTP exceptions. + """ + http_status = 0 + message = _("HTTP Error") + + def __init__(self, message=None, details=None, + response=None, request_id=None, + url=None, method=None, http_status=None): + self.http_status = http_status or self.http_status + self.message = message or self.message + self.details = details + self.request_id = request_id + self.response = response + self.url = url + self.method = method + formatted_string = "%s (HTTP %s)" % (self.message, self.http_status) + if request_id: + formatted_string += " (Request-ID: %s)" % request_id + super(HttpError, self).__init__(formatted_string) + + +class HTTPRedirection(HttpError): + """HTTP Redirection.""" + message = _("HTTP Redirection") + + +class HTTPClientError(HttpError): + """Client-side HTTP error. + + Exception for cases in which the client seems to have erred. + """ + message = _("HTTP Client Error") + + +class HttpServerError(HttpError): + """Server-side HTTP error. + + Exception for cases in which the server is aware that it has + erred or is incapable of performing the request. + """ + message = _("HTTP Server Error") + + +class MultipleChoices(HTTPRedirection): + """HTTP 300 - Multiple Choices. + + Indicates multiple options for the resource that the client may follow. + """ + + http_status = 300 + message = _("Multiple Choices") + + +class BadRequest(HTTPClientError): + """HTTP 400 - Bad Request. + + The request cannot be fulfilled due to bad syntax. + """ + http_status = 400 + message = _("Bad Request") + + +class Unauthorized(HTTPClientError): + """HTTP 401 - Unauthorized. + + Similar to 403 Forbidden, but specifically for use when authentication + is required and has failed or has not yet been provided. + """ + http_status = 401 + message = _("Unauthorized") + + +class PaymentRequired(HTTPClientError): + """HTTP 402 - Payment Required. + + Reserved for future use. + """ + http_status = 402 + message = _("Payment Required") + + +class Forbidden(HTTPClientError): + """HTTP 403 - Forbidden. + + The request was a valid request, but the server is refusing to respond + to it. + """ + http_status = 403 + message = _("Forbidden") + + +class NotFound(HTTPClientError): + """HTTP 404 - Not Found. + + The requested resource could not be found but may be available again + in the future. + """ + http_status = 404 + message = _("Not Found") + + +class MethodNotAllowed(HTTPClientError): + """HTTP 405 - Method Not Allowed. + + A request was made of a resource using a request method not supported + by that resource. + """ + http_status = 405 + message = _("Method Not Allowed") + + +class NotAcceptable(HTTPClientError): + """HTTP 406 - Not Acceptable. + + The requested resource is only capable of generating content not + acceptable according to the Accept headers sent in the request. + """ + http_status = 406 + message = _("Not Acceptable") + + +class ProxyAuthenticationRequired(HTTPClientError): + """HTTP 407 - Proxy Authentication Required. + + The client must first authenticate itself with the proxy. + """ + http_status = 407 + message = _("Proxy Authentication Required") + + +class RequestTimeout(HTTPClientError): + """HTTP 408 - Request Timeout. + + The server timed out waiting for the request. + """ + http_status = 408 + message = _("Request Timeout") + + +class Conflict(HTTPClientError): + """HTTP 409 - Conflict. + + Indicates that the request could not be processed because of conflict + in the request, such as an edit conflict. + """ + http_status = 409 + message = _("Conflict") + + +class Gone(HTTPClientError): + """HTTP 410 - Gone. + + Indicates that the resource requested is no longer available and will + not be available again. + """ + http_status = 410 + message = _("Gone") + + +class LengthRequired(HTTPClientError): + """HTTP 411 - Length Required. + + The request did not specify the length of its content, which is + required by the requested resource. + """ + http_status = 411 + message = _("Length Required") + + +class PreconditionFailed(HTTPClientError): + """HTTP 412 - Precondition Failed. + + The server does not meet one of the preconditions that the requester + put on the request. + """ + http_status = 412 + message = _("Precondition Failed") + + +class RequestEntityTooLarge(HTTPClientError): + """HTTP 413 - Request Entity Too Large. + + The request is larger than the server is willing or able to process. + """ + http_status = 413 + message = _("Request Entity Too Large") + + def __init__(self, *args, **kwargs): + try: + self.retry_after = int(kwargs.pop('retry_after')) + except (KeyError, ValueError): + self.retry_after = 0 + + super(RequestEntityTooLarge, self).__init__(*args, **kwargs) + + +class RequestUriTooLong(HTTPClientError): + """HTTP 414 - Request-URI Too Long. + + The URI provided was too long for the server to process. + """ + http_status = 414 + message = _("Request-URI Too Long") + + +class UnsupportedMediaType(HTTPClientError): + """HTTP 415 - Unsupported Media Type. + + The request entity has a media type which the server or resource does + not support. + """ + http_status = 415 + message = _("Unsupported Media Type") + + +class RequestedRangeNotSatisfiable(HTTPClientError): + """HTTP 416 - Requested Range Not Satisfiable. + + The client has asked for a portion of the file, but the server cannot + supply that portion. + """ + http_status = 416 + message = _("Requested Range Not Satisfiable") + + +class ExpectationFailed(HTTPClientError): + """HTTP 417 - Expectation Failed. + + The server cannot meet the requirements of the Expect request-header field. + """ + http_status = 417 + message = _("Expectation Failed") + + +class UnprocessableEntity(HTTPClientError): + """HTTP 422 - Unprocessable Entity. + + The request was well-formed but was unable to be followed due to semantic + errors. + """ + http_status = 422 + message = _("Unprocessable Entity") + + +class InternalServerError(HttpServerError): + """HTTP 500 - Internal Server Error. + + A generic error message, given when no more specific message is suitable. + """ + http_status = 500 + message = _("Internal Server Error") + + +# NotImplemented is a python keyword. +class HttpNotImplemented(HttpServerError): + """HTTP 501 - Not Implemented. + + The server either does not recognize the request method, or it lacks + the ability to fulfill the request. + """ + http_status = 501 + message = _("Not Implemented") + + +class BadGateway(HttpServerError): + """HTTP 502 - Bad Gateway. + + The server was acting as a gateway or proxy and received an invalid + response from the upstream server. + """ + http_status = 502 + message = _("Bad Gateway") + + +class ServiceUnavailable(HttpServerError): + """HTTP 503 - Service Unavailable. + + The server is currently unavailable. + """ + http_status = 503 + message = _("Service Unavailable") + + +class GatewayTimeout(HttpServerError): + """HTTP 504 - Gateway Timeout. + + The server was acting as a gateway or proxy and did not receive a timely + response from the upstream server. + """ + http_status = 504 + message = _("Gateway Timeout") + + +class HttpVersionNotSupported(HttpServerError): + """HTTP 505 - HttpVersion Not Supported. + + The server does not support the HTTP protocol version used in the request. + """ + http_status = 505 + message = _("HTTP Version Not Supported") + + +# _code_map contains all the classes that have http_status attribute. +_code_map = dict( + (getattr(obj, 'http_status', None), obj) + for name, obj in six.iteritems(vars(sys.modules[__name__])) + if inspect.isclass(obj) and getattr(obj, 'http_status', False) +) + + +def from_response(response, method, url): + """Returns an instance of :class:`HttpError` or subclass based on response. + + :param response: instance of `requests.Response` class + :param method: HTTP method used for request + :param url: URL used for request + """ + + req_id = response.headers.get("x-openstack-request-id") + # NOTE(hdd) true for older versions of nova and cinder + if not req_id: + req_id = response.headers.get("x-compute-request-id") + kwargs = { + "http_status": response.status_code, + "response": response, + "method": method, + "url": url, + "request_id": req_id, + } + if "retry-after" in response.headers: + kwargs["retry_after"] = response.headers["retry-after"] + + content_type = response.headers.get("Content-Type", "") + if content_type.startswith("application/json"): + try: + body = response.json() + except ValueError: + pass + else: + if isinstance(body, dict) and isinstance(body.get("error"), dict): + error = body["error"] + kwargs["message"] = error.get("message") + kwargs["details"] = error.get("details") + elif content_type.startswith("text/"): + kwargs["details"] = response.text + + try: + cls = _code_map[response.status_code] + except KeyError: + if 500 <= response.status_code < 600: + cls = HttpServerError + elif 400 <= response.status_code < 500: + cls = HTTPClientError + else: + cls = HttpError + return cls(**kwargs) diff --git a/congressclient/openstack/common/apiclient/fake_client.py b/congressclient/openstack/common/apiclient/fake_client.py new file mode 100644 index 0000000..1f2e8c6 --- /dev/null +++ b/congressclient/openstack/common/apiclient/fake_client.py @@ -0,0 +1,175 @@ +# 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. + +""" +A fake server that "responds" to API methods with pre-canned responses. + +All of these responses come from the spec, so if for some reason the spec's +wrong the tests might raise AssertionError. I've indicated in comments the +places where actual behavior differs from the spec. +""" + +# W0102: Dangerous default value %s as argument +# pylint: disable=W0102 + +import json + +import requests +import six +from six.moves.urllib import parse + +from congressclient.openstack.common.apiclient import client + + +def assert_has_keys(dct, required=None, optional=None): + required = required or [] + optional = optional or [] + for k in required: + try: + assert k in dct + except AssertionError: + extra_keys = set(dct.keys()).difference(set(required + optional)) + raise AssertionError("found unexpected keys: %s" % + list(extra_keys)) + + +class TestResponse(requests.Response): + """Wrap requests.Response and provide a convenient initialization. + """ + + def __init__(self, data): + super(TestResponse, self).__init__() + self._content_consumed = True + if isinstance(data, dict): + self.status_code = data.get('status_code', 200) + # Fake the text attribute to streamline Response creation + text = data.get('text', "") + if isinstance(text, (dict, list)): + self._content = json.dumps(text) + default_headers = { + "Content-Type": "application/json", + } + else: + self._content = text + default_headers = {} + if six.PY3 and isinstance(self._content, six.string_types): + self._content = self._content.encode('utf-8', 'strict') + self.headers = data.get('headers') or default_headers + else: + self.status_code = data + + def __eq__(self, other): + return (self.status_code == other.status_code and + self.headers == other.headers and + self._content == other._content) + + +class FakeHTTPClient(client.HTTPClient): + + def __init__(self, *args, **kwargs): + self.callstack = [] + self.fixtures = kwargs.pop("fixtures", None) or {} + if not args and "auth_plugin" not in kwargs: + args = (None, ) + super(FakeHTTPClient, self).__init__(*args, **kwargs) + + def assert_called(self, method, url, body=None, pos=-1): + """Assert than an API method was just called. + """ + expected = (method, url) + called = self.callstack[pos][0:2] + assert self.callstack, \ + "Expected %s %s but no calls were made." % expected + + assert expected == called, 'Expected %s %s; got %s %s' % \ + (expected + called) + + if body is not None: + if self.callstack[pos][3] != body: + raise AssertionError('%r != %r' % + (self.callstack[pos][3], body)) + + def assert_called_anytime(self, method, url, body=None): + """Assert than an API method was called anytime in the test. + """ + expected = (method, url) + + assert self.callstack, \ + "Expected %s %s but no calls were made." % expected + + found = False + entry = None + for entry in self.callstack: + if expected == entry[0:2]: + found = True + break + + assert found, 'Expected %s %s; got %s' % \ + (method, url, self.callstack) + if body is not None: + assert entry[3] == body, "%s != %s" % (entry[3], body) + + self.callstack = [] + + def clear_callstack(self): + self.callstack = [] + + def authenticate(self): + pass + + def client_request(self, client, method, url, **kwargs): + # Check that certain things are called correctly + if method in ["GET", "DELETE"]: + assert "json" not in kwargs + + # Note the call + self.callstack.append( + (method, + url, + kwargs.get("headers") or {}, + kwargs.get("json") or kwargs.get("data"))) + try: + fixture = self.fixtures[url][method] + except KeyError: + pass + else: + return TestResponse({"headers": fixture[0], + "text": fixture[1]}) + + # Call the method + args = parse.parse_qsl(parse.urlparse(url)[4]) + kwargs.update(args) + munged_url = url.rsplit('?', 1)[0] + munged_url = munged_url.strip('/').replace('/', '_').replace('.', '_') + munged_url = munged_url.replace('-', '_') + + callback = "%s_%s" % (method.lower(), munged_url) + + if not hasattr(self, callback): + raise AssertionError('Called unknown API method: %s %s, ' + 'expected fakes method name: %s' % + (method, url, callback)) + + resp = getattr(self, callback)(**kwargs) + if len(resp) == 3: + status, headers, body = resp + else: + status, body = resp + headers = {} + return TestResponse({ + "status_code": status, + "text": body, + "headers": headers, + }) diff --git a/congressclient/openstack/common/gettextutils.py b/congressclient/openstack/common/gettextutils.py new file mode 100644 index 0000000..c5fef77 --- /dev/null +++ b/congressclient/openstack/common/gettextutils.py @@ -0,0 +1,479 @@ +# 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 congressclient.openstack.common.gettextutils import _ +""" + +import copy +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, 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 + 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 + t = gettext.translation(domain, + localedir=self.localedir, + fallback=True) + # Use the appropriate method of the translation object based + # on the python version. + m = t.gettext if six.PY3 else t.ugettext + + def f(msg): + """oslo.i18n.gettextutils translation function.""" + if USE_LAZY: + return Message(msg, domain=domain) + return m(msg) + return f + + @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('congressclient') + +# 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. + """ + global USE_LAZY + USE_LAZY = True + + +def install(domain): + """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). + + Note that to enable lazy translation, enable_lazy must be + called. + + :param domain: the translation domain + """ + from six import moves + tf = TranslatorFactory(domain) + moves.builtins.__dict__['_'] = tf.primary + + +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='congressclient', *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/congressclient/openstack/common/importutils.py b/congressclient/openstack/common/importutils.py new file mode 100644 index 0000000..2a8367c --- /dev/null +++ b/congressclient/openstack/common/importutils.py @@ -0,0 +1,73 @@ +# 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. + +""" +Import related utilities and helper functions. +""" + +import sys +import traceback + + +def import_class(import_str): + """Returns a class from a string including module and class.""" + mod_str, _sep, class_str = import_str.rpartition('.') + __import__(mod_str) + try: + return getattr(sys.modules[mod_str], class_str) + except AttributeError: + raise ImportError('Class %s cannot be found (%s)' % + (class_str, + traceback.format_exception(*sys.exc_info()))) + + +def import_object(import_str, *args, **kwargs): + """Import a class and return an instance of it.""" + return import_class(import_str)(*args, **kwargs) + + +def import_object_ns(name_space, import_str, *args, **kwargs): + """Tries to import object from default namespace. + + Imports a class and return an instance of it, first by trying + to find the class in a default namespace, then failing back to + a full path if not found in the default namespace. + """ + import_value = "%s.%s" % (name_space, import_str) + try: + return import_class(import_value)(*args, **kwargs) + except ImportError: + return import_class(import_str)(*args, **kwargs) + + +def import_module(import_str): + """Import a module.""" + __import__(import_str) + return sys.modules[import_str] + + +def import_versioned_module(version, submodule=None): + module = 'congressclient.v%s' % version + if submodule: + module = '.'.join((module, submodule)) + return import_module(module) + + +def try_import(import_str, default=None): + """Try to import a module and if it fails return default.""" + try: + return import_module(import_str) + except ImportError: + return default diff --git a/congressclient/openstack/common/jsonutils.py b/congressclient/openstack/common/jsonutils.py new file mode 100644 index 0000000..3149a06 --- /dev/null +++ b/congressclient/openstack/common/jsonutils.py @@ -0,0 +1,196 @@ +# Copyright 2010 United States Government as represented by the +# Administrator of the National Aeronautics and Space Administration. +# Copyright 2011 Justin Santa Barbara +# 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. + +''' +JSON related utilities. + +This module provides a few things: + + 1) A handy function for getting an object down to something that can be + JSON serialized. See to_primitive(). + + 2) Wrappers around loads() and dumps(). The dumps() wrapper will + automatically use to_primitive() for you if needed. + + 3) This sets up anyjson to use the loads() and dumps() wrappers if anyjson + is available. +''' + + +import codecs +import datetime +import functools +import inspect +import itertools +import sys + +is_simplejson = False +if sys.version_info < (2, 7): + # On Python <= 2.6, json module is not C boosted, so try to use + # simplejson module if available + try: + import simplejson as json + is_simplejson = True + except ImportError: + import json +else: + import json + +import six +import six.moves.xmlrpc_client as xmlrpclib + +from congressclient.openstack.common import gettextutils +from congressclient.openstack.common import importutils +from congressclient.openstack.common import strutils +from congressclient.openstack.common import timeutils + +netaddr = importutils.try_import("netaddr") + +_nasty_type_tests = [inspect.ismodule, inspect.isclass, inspect.ismethod, + inspect.isfunction, inspect.isgeneratorfunction, + inspect.isgenerator, inspect.istraceback, inspect.isframe, + inspect.iscode, inspect.isbuiltin, inspect.isroutine, + inspect.isabstract] + +_simple_types = (six.string_types + six.integer_types + + (type(None), bool, float)) + + +def to_primitive(value, convert_instances=False, convert_datetime=True, + level=0, max_depth=3): + """Convert a complex object into primitives. + + Handy for JSON serialization. We can optionally handle instances, + but since this is a recursive function, we could have cyclical + data structures. + + To handle cyclical data structures we could track the actual objects + visited in a set, but not all objects are hashable. Instead we just + track the depth of the object inspections and don't go too deep. + + Therefore, convert_instances=True is lossy ... be aware. + + """ + # handle obvious types first - order of basic types determined by running + # full tests on nova project, resulting in the following counts: + # 572754 + # 460353 + # 379632 + # 274610 + # 199918 + # 114200 + # 51817 + # 26164 + # 6491 + # 283 + # 19 + if isinstance(value, _simple_types): + return value + + if isinstance(value, datetime.datetime): + if convert_datetime: + return timeutils.strtime(value) + else: + return value + + # value of itertools.count doesn't get caught by nasty_type_tests + # and results in infinite loop when list(value) is called. + if type(value) == itertools.count: + return six.text_type(value) + + # FIXME(vish): Workaround for LP bug 852095. Without this workaround, + # tests that raise an exception in a mocked method that + # has a @wrap_exception with a notifier will fail. If + # we up the dependency to 0.5.4 (when it is released) we + # can remove this workaround. + if getattr(value, '__module__', None) == 'mox': + return 'mock' + + if level > max_depth: + return '?' + + # The try block may not be necessary after the class check above, + # but just in case ... + try: + recursive = functools.partial(to_primitive, + convert_instances=convert_instances, + convert_datetime=convert_datetime, + level=level, + max_depth=max_depth) + if isinstance(value, dict): + return dict((k, recursive(v)) for k, v in six.iteritems(value)) + elif isinstance(value, (list, tuple)): + return [recursive(lv) for lv in value] + + # It's not clear why xmlrpclib created their own DateTime type, but + # for our purposes, make it a datetime type which is explicitly + # handled + if isinstance(value, xmlrpclib.DateTime): + value = datetime.datetime(*tuple(value.timetuple())[:6]) + + if convert_datetime and isinstance(value, datetime.datetime): + return timeutils.strtime(value) + elif isinstance(value, gettextutils.Message): + return value.data + elif hasattr(value, 'iteritems'): + return recursive(dict(value.iteritems()), level=level + 1) + elif hasattr(value, '__iter__'): + return recursive(list(value)) + elif convert_instances and hasattr(value, '__dict__'): + # Likely an instance of something. Watch for cycles. + # Ignore class member vars. + return recursive(value.__dict__, level=level + 1) + elif netaddr and isinstance(value, netaddr.IPAddress): + return six.text_type(value) + else: + if any(test(value) for test in _nasty_type_tests): + return six.text_type(value) + return value + except TypeError: + # Class objects are tricky since they may define something like + # __iter__ defined but it isn't callable as list(). + return six.text_type(value) + + +def dumps(value, default=to_primitive, **kwargs): + if is_simplejson: + kwargs['namedtuple_as_object'] = False + return json.dumps(value, default=default, **kwargs) + + +def dump(obj, fp, *args, **kwargs): + if is_simplejson: + kwargs['namedtuple_as_object'] = False + return json.dump(obj, fp, *args, **kwargs) + + +def loads(s, encoding='utf-8', **kwargs): + return json.loads(strutils.safe_decode(s, encoding), **kwargs) + + +def load(fp, encoding='utf-8', **kwargs): + return json.load(codecs.getreader(encoding)(fp), **kwargs) + + +try: + import anyjson +except ImportError: + pass +else: + anyjson._modules.append((__name__, 'dumps', TypeError, + 'loads', ValueError, 'load')) + anyjson.force_implementation(__name__) diff --git a/congressclient/openstack/common/strutils.py b/congressclient/openstack/common/strutils.py new file mode 100644 index 0000000..5071a41 --- /dev/null +++ b/congressclient/openstack/common/strutils.py @@ -0,0 +1,311 @@ +# 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. + +""" +System-level utilities and helper functions. +""" + +import math +import re +import sys +import unicodedata + +import six + +from congressclient.openstack.common.gettextutils import _ + + +UNIT_PREFIX_EXPONENT = { + 'k': 1, + 'K': 1, + 'Ki': 1, + 'M': 2, + 'Mi': 2, + 'G': 3, + 'Gi': 3, + 'T': 4, + 'Ti': 4, +} +UNIT_SYSTEM_INFO = { + 'IEC': (1024, re.compile(r'(^[-+]?\d*\.?\d+)([KMGT]i?)?(b|bit|B)$')), + 'SI': (1000, re.compile(r'(^[-+]?\d*\.?\d+)([kMGT])?(b|bit|B)$')), +} + +TRUE_STRINGS = ('1', 't', 'true', 'on', 'y', 'yes') +FALSE_STRINGS = ('0', 'f', 'false', 'off', 'n', 'no') + +SLUGIFY_STRIP_RE = re.compile(r"[^\w\s-]") +SLUGIFY_HYPHENATE_RE = re.compile(r"[-\s]+") + + +# NOTE(flaper87): The following globals are used by `mask_password` +_SANITIZE_KEYS = ['adminPass', 'admin_pass', 'password', 'admin_password'] + +# NOTE(ldbragst): Let's build a list of regex objects using the list of +# _SANITIZE_KEYS we already have. This way, we only have to add the new key +# to the list of _SANITIZE_KEYS and we can generate regular expressions +# for XML and JSON automatically. +_SANITIZE_PATTERNS_2 = [] +_SANITIZE_PATTERNS_1 = [] + +# NOTE(amrith): Some regular expressions have only one parameter, some +# have two parameters. Use different lists of patterns here. +_FORMAT_PATTERNS_1 = [r'(%(key)s\s*[=]\s*)[^\s^\'^\"]+'] +_FORMAT_PATTERNS_2 = [r'(%(key)s\s*[=]\s*[\"\']).*?([\"\'])', + r'(%(key)s\s+[\"\']).*?([\"\'])', + r'([-]{2}%(key)s\s+)[^\'^\"^=^\s]+([\s]*)', + r'(<%(key)s>).*?()', + r'([\"\']%(key)s[\"\']\s*:\s*[\"\']).*?([\"\'])', + r'([\'"].*?%(key)s[\'"]\s*:\s*u?[\'"]).*?([\'"])', + r'([\'"].*?%(key)s[\'"]\s*,\s*\'--?[A-z]+\'\s*,\s*u?' + '[\'"]).*?([\'"])', + r'(%(key)s\s*--?[A-z]+\s*)\S+(\s*)'] + +for key in _SANITIZE_KEYS: + for pattern in _FORMAT_PATTERNS_2: + reg_ex = re.compile(pattern % {'key': key}, re.DOTALL) + _SANITIZE_PATTERNS_2.append(reg_ex) + + for pattern in _FORMAT_PATTERNS_1: + reg_ex = re.compile(pattern % {'key': key}, re.DOTALL) + _SANITIZE_PATTERNS_1.append(reg_ex) + + +def int_from_bool_as_string(subject): + """Interpret a string as a boolean and return either 1 or 0. + + Any string value in: + + ('True', 'true', 'On', 'on', '1') + + is interpreted as a boolean True. + + Useful for JSON-decoded stuff and config file parsing + """ + return bool_from_string(subject) and 1 or 0 + + +def bool_from_string(subject, strict=False, default=False): + """Interpret a string as a boolean. + + A case-insensitive match is performed such that strings matching 't', + 'true', 'on', 'y', 'yes', or '1' are considered True and, when + `strict=False`, anything else returns the value specified by 'default'. + + Useful for JSON-decoded stuff and config file parsing. + + If `strict=True`, unrecognized values, including None, will raise a + ValueError which is useful when parsing values passed in from an API call. + Strings yielding False are 'f', 'false', 'off', 'n', 'no', or '0'. + """ + if not isinstance(subject, six.string_types): + subject = six.text_type(subject) + + lowered = subject.strip().lower() + + if lowered in TRUE_STRINGS: + return True + elif lowered in FALSE_STRINGS: + return False + elif strict: + acceptable = ', '.join( + "'%s'" % s for s in sorted(TRUE_STRINGS + FALSE_STRINGS)) + msg = _("Unrecognized value '%(val)s', acceptable values are:" + " %(acceptable)s") % {'val': subject, + 'acceptable': acceptable} + raise ValueError(msg) + else: + return default + + +def safe_decode(text, incoming=None, errors='strict'): + """Decodes incoming text/bytes string using `incoming` if they're not + already unicode. + + :param incoming: Text's current encoding + :param errors: Errors handling policy. See here for valid + values http://docs.python.org/2/library/codecs.html + :returns: text or a unicode `incoming` encoded + representation of it. + :raises TypeError: If text is not an instance of str + """ + if not isinstance(text, (six.string_types, six.binary_type)): + raise TypeError("%s can't be decoded" % type(text)) + + if isinstance(text, six.text_type): + return text + + if not incoming: + incoming = (sys.stdin.encoding or + sys.getdefaultencoding()) + + try: + return text.decode(incoming, errors) + except UnicodeDecodeError: + # Note(flaper87) If we get here, it means that + # sys.stdin.encoding / sys.getdefaultencoding + # didn't return a suitable encoding to decode + # text. This happens mostly when global LANG + # var is not set correctly and there's no + # default encoding. In this case, most likely + # python will use ASCII or ANSI encoders as + # default encodings but they won't be capable + # of decoding non-ASCII characters. + # + # Also, UTF-8 is being used since it's an ASCII + # extension. + return text.decode('utf-8', errors) + + +def safe_encode(text, incoming=None, + encoding='utf-8', errors='strict'): + """Encodes incoming text/bytes string using `encoding`. + + If incoming is not specified, text is expected to be encoded with + current python's default encoding. (`sys.getdefaultencoding`) + + :param incoming: Text's current encoding + :param encoding: Expected encoding for text (Default UTF-8) + :param errors: Errors handling policy. See here for valid + values http://docs.python.org/2/library/codecs.html + :returns: text or a bytestring `encoding` encoded + representation of it. + :raises TypeError: If text is not an instance of str + """ + if not isinstance(text, (six.string_types, six.binary_type)): + raise TypeError("%s can't be encoded" % type(text)) + + if not incoming: + incoming = (sys.stdin.encoding or + sys.getdefaultencoding()) + + if isinstance(text, six.text_type): + return text.encode(encoding, errors) + elif text and encoding != incoming: + # Decode text before encoding it with `encoding` + text = safe_decode(text, incoming, errors) + return text.encode(encoding, errors) + else: + return text + + +def string_to_bytes(text, unit_system='IEC', return_int=False): + """Converts a string into an float representation of bytes. + + The units supported for IEC :: + + Kb(it), Kib(it), Mb(it), Mib(it), Gb(it), Gib(it), Tb(it), Tib(it) + KB, KiB, MB, MiB, GB, GiB, TB, TiB + + The units supported for SI :: + + kb(it), Mb(it), Gb(it), Tb(it) + kB, MB, GB, TB + + Note that the SI unit system does not support capital letter 'K' + + :param text: String input for bytes size conversion. + :param unit_system: Unit system for byte size conversion. + :param return_int: If True, returns integer representation of text + in bytes. (default: decimal) + :returns: Numerical representation of text in bytes. + :raises ValueError: If text has an invalid value. + + """ + try: + base, reg_ex = UNIT_SYSTEM_INFO[unit_system] + except KeyError: + msg = _('Invalid unit system: "%s"') % unit_system + raise ValueError(msg) + match = reg_ex.match(text) + if match: + magnitude = float(match.group(1)) + unit_prefix = match.group(2) + if match.group(3) in ['b', 'bit']: + magnitude /= 8 + else: + msg = _('Invalid string format: %s') % text + raise ValueError(msg) + if not unit_prefix: + res = magnitude + else: + res = magnitude * pow(base, UNIT_PREFIX_EXPONENT[unit_prefix]) + if return_int: + return int(math.ceil(res)) + return res + + +def to_slug(value, incoming=None, errors="strict"): + """Normalize string. + + Convert to lowercase, remove non-word characters, and convert spaces + to hyphens. + + Inspired by Django's `slugify` filter. + + :param value: Text to slugify + :param incoming: Text's current encoding + :param errors: Errors handling policy. See here for valid + values http://docs.python.org/2/library/codecs.html + :returns: slugified unicode representation of `value` + :raises TypeError: If text is not an instance of str + """ + value = safe_decode(value, incoming, errors) + # NOTE(aababilov): no need to use safe_(encode|decode) here: + # encodings are always "ascii", error handling is always "ignore" + # and types are always known (first: unicode; second: str) + value = unicodedata.normalize("NFKD", value).encode( + "ascii", "ignore").decode("ascii") + value = SLUGIFY_STRIP_RE.sub("", value).strip().lower() + return SLUGIFY_HYPHENATE_RE.sub("-", value) + + +def mask_password(message, secret="***"): + """Replace password with 'secret' in message. + + :param message: The string which includes security information. + :param secret: value with which to replace passwords. + :returns: The unicode value of message with the password fields masked. + + For example: + + >>> mask_password("'adminPass' : 'aaaaa'") + "'adminPass' : '***'" + >>> mask_password("'admin_pass' : 'aaaaa'") + "'admin_pass' : '***'" + >>> mask_password('"password" : "aaaaa"') + '"password" : "***"' + >>> mask_password("'original_password' : 'aaaaa'") + "'original_password' : '***'" + >>> mask_password("u'original_password' : u'aaaaa'") + "u'original_password' : u'***'" + """ + message = six.text_type(message) + + # NOTE(ldbragst): Check to see if anything in message contains any key + # specified in _SANITIZE_KEYS, if not then just return the message since + # we don't have to mask any passwords. + if not any(key in message for key in _SANITIZE_KEYS): + return message + + substitute = r'\g<1>' + secret + r'\g<2>' + for pattern in _SANITIZE_PATTERNS_2: + message = re.sub(pattern, substitute, message) + + substitute = r'\g<1>' + secret + for pattern in _SANITIZE_PATTERNS_1: + message = re.sub(pattern, substitute, message) + + return message diff --git a/congressclient/openstack/common/timeutils.py b/congressclient/openstack/common/timeutils.py new file mode 100644 index 0000000..c48da95 --- /dev/null +++ b/congressclient/openstack/common/timeutils.py @@ -0,0 +1,210 @@ +# 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. + +""" +Time related utilities and helper functions. +""" + +import calendar +import datetime +import time + +import iso8601 +import six + + +# ISO 8601 extended time format with microseconds +_ISO8601_TIME_FORMAT_SUBSECOND = '%Y-%m-%dT%H:%M:%S.%f' +_ISO8601_TIME_FORMAT = '%Y-%m-%dT%H:%M:%S' +PERFECT_TIME_FORMAT = _ISO8601_TIME_FORMAT_SUBSECOND + + +def isotime(at=None, subsecond=False): + """Stringify time in ISO 8601 format.""" + if not at: + at = utcnow() + st = at.strftime(_ISO8601_TIME_FORMAT + if not subsecond + else _ISO8601_TIME_FORMAT_SUBSECOND) + tz = at.tzinfo.tzname(None) if at.tzinfo else 'UTC' + st += ('Z' if tz == 'UTC' else tz) + return st + + +def parse_isotime(timestr): + """Parse time from ISO 8601 format.""" + try: + return iso8601.parse_date(timestr) + except iso8601.ParseError as e: + raise ValueError(six.text_type(e)) + except TypeError as e: + raise ValueError(six.text_type(e)) + + +def strtime(at=None, fmt=PERFECT_TIME_FORMAT): + """Returns formatted utcnow.""" + if not at: + at = utcnow() + return at.strftime(fmt) + + +def parse_strtime(timestr, fmt=PERFECT_TIME_FORMAT): + """Turn a formatted time back into a datetime.""" + return datetime.datetime.strptime(timestr, fmt) + + +def normalize_time(timestamp): + """Normalize time in arbitrary timezone to UTC naive object.""" + offset = timestamp.utcoffset() + if offset is None: + return timestamp + return timestamp.replace(tzinfo=None) - offset + + +def is_older_than(before, seconds): + """Return True if before is older than seconds.""" + if isinstance(before, six.string_types): + before = parse_strtime(before).replace(tzinfo=None) + else: + before = before.replace(tzinfo=None) + + return utcnow() - before > datetime.timedelta(seconds=seconds) + + +def is_newer_than(after, seconds): + """Return True if after is newer than seconds.""" + if isinstance(after, six.string_types): + after = parse_strtime(after).replace(tzinfo=None) + else: + after = after.replace(tzinfo=None) + + return after - utcnow() > datetime.timedelta(seconds=seconds) + + +def utcnow_ts(): + """Timestamp version of our utcnow function.""" + if utcnow.override_time is None: + # NOTE(kgriffs): This is several times faster + # than going through calendar.timegm(...) + return int(time.time()) + + return calendar.timegm(utcnow().timetuple()) + + +def utcnow(): + """Overridable version of utils.utcnow.""" + if utcnow.override_time: + try: + return utcnow.override_time.pop(0) + except AttributeError: + return utcnow.override_time + return datetime.datetime.utcnow() + + +def iso8601_from_timestamp(timestamp): + """Returns an iso8601 formatted date from timestamp.""" + return isotime(datetime.datetime.utcfromtimestamp(timestamp)) + + +utcnow.override_time = None + + +def set_time_override(override_time=None): + """Overrides utils.utcnow. + + Make it return a constant time or a list thereof, one at a time. + + :param override_time: datetime instance or list thereof. If not + given, defaults to the current UTC time. + """ + utcnow.override_time = override_time or datetime.datetime.utcnow() + + +def advance_time_delta(timedelta): + """Advance overridden time using a datetime.timedelta.""" + assert utcnow.override_time is not None + try: + for dt in utcnow.override_time: + dt += timedelta + except TypeError: + utcnow.override_time += timedelta + + +def advance_time_seconds(seconds): + """Advance overridden time by seconds.""" + advance_time_delta(datetime.timedelta(0, seconds)) + + +def clear_time_override(): + """Remove the overridden time.""" + utcnow.override_time = None + + +def marshall_now(now=None): + """Make an rpc-safe datetime with microseconds. + + Note: tzinfo is stripped, but not required for relative times. + """ + if not now: + now = utcnow() + return dict(day=now.day, month=now.month, year=now.year, hour=now.hour, + minute=now.minute, second=now.second, + microsecond=now.microsecond) + + +def unmarshall_time(tyme): + """Unmarshall a datetime dict.""" + return datetime.datetime(day=tyme['day'], + month=tyme['month'], + year=tyme['year'], + hour=tyme['hour'], + minute=tyme['minute'], + second=tyme['second'], + microsecond=tyme['microsecond']) + + +def delta_seconds(before, after): + """Return the difference between two timing objects. + + Compute the difference in seconds between two date, time, or + datetime objects (as a float, to microsecond resolution). + """ + delta = after - before + return total_seconds(delta) + + +def total_seconds(delta): + """Return the total seconds of datetime.timedelta object. + + Compute total seconds of datetime.timedelta, datetime.timedelta + doesn't have method total_seconds in Python2.6, calculate it manually. + """ + try: + return delta.total_seconds() + except AttributeError: + return ((delta.days * 24 * 3600) + delta.seconds + + float(delta.microseconds) / (10 ** 6)) + + +def is_soon(dt, window): + """Determines if time is going to happen in the next window seconds. + + :param dt: the time + :param window: minimum seconds to remain to consider the time not soon + + :return: True if expiration is within the given duration + """ + soon = (utcnow() + datetime.timedelta(seconds=window)) + return normalize_time(dt) <= soon