Cloudpulse application code

Change-Id: I84795eae78ff3109af3e4ba525615382dc04f377
Implements: blueprint cloudpulse-api-handler

cloudpulse/api/app.py

@@ -0,0 +1,62 @@
+#    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 oslo_config import cfg
+import pecan
+
+from cloudpulse.api import auth
+from cloudpulse.api import config as api_config
+from cloudpulse.api import middleware
+
+# Register options for the service
+API_SERVICE_OPTS = [
+    cfg.IntOpt('port',
+               default=9511,
+               help='The port for the cloudpulse API server'),
+    cfg.StrOpt('host',
+               default='127.0.0.1',
+               help='The listen IP for the cloudpulse API server'),
+    cfg.IntOpt('max_limit',
+               default=1000,
+               help='The maximum number of items returned in a single '
+                    'response from a collection resource.')
+]
+
+CONF = cfg.CONF
+opt_group = cfg.OptGroup(name='api',
+                         title='Options for the cloudpulse-api service')
+CONF.register_group(opt_group)
+CONF.register_opts(API_SERVICE_OPTS, opt_group)
+
+
+def get_pecan_config():
+    # Set up the pecan configuration
+    filename = api_config.__file__.replace('.pyc', '.py')
+    return pecan.configuration.conf_from_file(filename)
+
+
+def setup_app(config=None):
+    if not config:
+        config = get_pecan_config()
+
+    app_conf = dict(config.app)
+
+    app = pecan.make_app(
+        app_conf.pop('root'),
+        logging=getattr(config, 'logging', {}),
+        wrap_app=middleware.ParsableErrorMiddleware,
+        **app_conf
+    )
+
+#    TBD Add test hook later
+#    cpulseTimer(10, timerfunc, "Cpulse")
+    return auth.install(app, CONF, config.app.acl_public_routes)

cloudpulse/api/auth.py

@@ -0,0 +1,48 @@
+# -*- encoding: utf-8 -*-
+#
+# Copyright © 2012 New Dream Network, LLC (DreamHost)
+#
+# 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.
+
+"""Access Control Lists (ACL's) control access the API server."""
+from oslo_config import cfg
+
+from cloudpulse.api.middleware import auth_token
+
+
+AUTH_OPTS = [
+    cfg.BoolOpt('enable_authentication',
+                default=True,
+                help='This option enables or disables user authentication '
+                'via keystone. Default value is True.'),
+]
+
+CONF = cfg.CONF
+CONF.register_opts(AUTH_OPTS)
+
+
+def install(app, conf, public_routes):
+    """Install ACL check on application.
+
+    :param app: A WSGI applicatin.
+    :param conf: Settings. Dict'ified and passed to keystonemiddleware
+    :param public_routes: The list of the routes which will be allowed to
+                          access without authentication.
+    :return: The same WSGI application with ACL installed.
+
+    """
+    if not cfg.CONF.get('enable_authentication'):
+        return app
+    return auth_token.AuthTokenMiddleware(app,
+                                          conf=dict(conf),
+                                          public_api_routes=public_routes)

cloudpulse/api/config.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright 2013 - Noorul Islam K M
+#
+# 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 cloudpulse.api import hooks
+
+# Pecan Application Configurations
+app = {
+    'root': 'cloudpulse.api.controllers.root.RootController',
+    'modules': ['cloudpulse.api'],
+    'debug': False,
+    'hooks': [
+        hooks.ContextHook(),
+        hooks.RPCHook(),
+        hooks.NoExceptionTracebackHook(),
+    ],
+    'acl_public_routes': [
+        '/'
+    ],
+}

cloudpulse/api/hooks.py

@@ -0,0 +1,119 @@
+# -*- encoding: utf-8 -*-
+#
+# Copyright © 2012 New Dream Network, LLC (DreamHost)
+#
+# 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 oslo_config import cfg
+from oslo_utils import importutils
+from pecan import hooks
+
+from cloudpulse.common import context
+from cloudpulse.conductor import api as conductor_api
+
+
+class ContextHook(hooks.PecanHook):
+    """Configures a request context and attaches it to the request.
+
+    The following HTTP request headers are used:
+
+    X-User:
+        Used for context.user.
+
+    X-User-Id:
+        Used for context.user_id.
+
+    X-Project-Name:
+        Used for context.project.
+
+    X-Project-Id:
+        Used for context.project_id.
+
+    X-Auth-Token:
+        Used for context.auth_token.
+
+    """
+
+    def before(self, state):
+        headers = state.request.headers
+        user = headers.get('X-User')
+        user_id = headers.get('X-User-Id')
+        project = headers.get('X-Project-Name')
+        project_id = headers.get('X-Project-Id')
+        domain_id = headers.get('X-User-Domain-Id')
+        domain_name = headers.get('X-User-Domain-Name')
+        auth_token = headers.get('X-Storage-Token')
+        auth_token = headers.get('X-Auth-Token', auth_token)
+        auth_token_info = state.request.environ.get('keystone.token_info')
+
+        auth_url = headers.get('X-Auth-Url')
+        if auth_url is None:
+            importutils.import_module('keystonemiddleware.auth_token')
+            auth_url = cfg.CONF.keystone_authtoken.auth_uri
+
+        state.request.context = context.make_context(
+            auth_token=auth_token,
+            auth_url=auth_url,
+            auth_token_info=auth_token_info,
+            user=user,
+            user_id=user_id,
+            project=project,
+            project_id=project_id,
+            domain_id=domain_id,
+            domain_name=domain_name)
+
+
+class RPCHook(hooks.PecanHook):
+    """Attach the rpcapi object to the request so controllers can get to it."""
+
+    def before(self, state):
+        state.request.rpcapi = conductor_api.API(context=state.request.context)
+
+
+class NoExceptionTracebackHook(hooks.PecanHook):
+    """Workaround rpc.common: deserialize_remote_exception.
+
+    deserialize_remote_exception builds rpc exception traceback into error
+    message which is then sent to the client. Such behavior is a security
+    concern so this hook is aimed to cut-off traceback from the error message.
+    """
+    # NOTE(max_lobur): 'after' hook used instead of 'on_error' because
+    # 'on_error' never fired for wsme+pecan pair. wsme @wsexpose decorator
+    # catches and handles all the errors, so 'on_error' dedicated for unhandled
+    # exceptions never fired.
+    def after(self, state):
+        # Omit empty body. Some errors may not have body at this level yet.
+        if not state.response.body:
+            return
+
+        # Do nothing if there is no error.
+        if 200 <= state.response.status_int < 400:
+            return
+
+        json_body = state.response.json
+        # Do not remove traceback when server in debug mode (except 'Server'
+        # errors when 'debuginfo' will be used for traces).
+        if cfg.CONF.debug and json_body.get('faultcode') != 'Server':
+            return
+
+        faultsting = json_body.get('faultstring')
+        traceback_marker = 'Traceback (most recent call last):'
+        if faultsting and (traceback_marker in faultsting):
+            # Cut-off traceback.
+            faultsting = faultsting.split(traceback_marker, 1)[0]
+            # Remove trailing newlines and spaces if any.
+            json_body['faultstring'] = faultsting.rstrip()
+            # Replace the whole json. Cannot change original one beacause it's
+            # generated on the fly.
+            state.response.json = json_body