154 lines
4.7 KiB
Python
154 lines
4.7 KiB
Python
# Copyright (c) 2013 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from keystoneauth1 import adapter
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from oslo_serialization import jsonutils
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import requests
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from blazarclient import exception
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from blazarclient.i18n import _
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class RequestManager(object):
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"""Manager to create request from given Blazar URL and auth token."""
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def __init__(self, blazar_url, auth_token, user_agent):
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self.blazar_url = blazar_url
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self.auth_token = auth_token
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self.user_agent = user_agent
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def get(self, url):
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"""Sends get request to Blazar.
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:param url: URL to the wanted Blazar resource.
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:type url: str
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"""
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return self.request(url, 'GET')
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def post(self, url, body):
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"""Sends post request to Blazar.
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:param url: URL to the wanted Blazar resource.
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:type url: str
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:param body: Values resource to be created from.
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:type body: dict
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"""
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return self.request(url, 'POST', body=body)
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def delete(self, url):
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"""Sends delete request to Blazar.
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:param url: URL to the wanted Blazar resource.
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:type url: str
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"""
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return self.request(url, 'DELETE')
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def put(self, url, body):
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"""Sends update request to Blazar.
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:param url: URL to the wanted Blazar resource.
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:type url: str
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:param body: Values resource to be updated from.
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:type body: dict
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"""
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return self.request(url, 'PUT', body=body)
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def request(self, url, method, **kwargs):
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"""Base request method.
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Adds specific headers and URL prefix to the request.
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:param url: Resource URL.
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:type url: str
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:param method: Method to be called (GET, POST, PUT, DELETE).
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:type method: str
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:returns: Response and body.
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:rtype: tuple
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"""
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kwargs.setdefault('headers', kwargs.get('headers', {}))
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kwargs['headers']['User-Agent'] = self.user_agent
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kwargs['headers']['Accept'] = 'application/json'
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kwargs['headers']['x-auth-token'] = self.auth_token
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if 'body' in kwargs:
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kwargs['headers']['Content-Type'] = 'application/json'
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kwargs['data'] = jsonutils.dump_as_bytes(kwargs['body'])
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del kwargs['body']
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resp = requests.request(method, self.blazar_url + url, **kwargs)
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try:
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body = jsonutils.loads(resp.text)
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except ValueError:
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body = None
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if resp.status_code >= 400:
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if body is not None:
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error_message = body.get('error_message', body)
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else:
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error_message = resp.text
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body = _("ERROR: {0}").format(error_message)
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raise exception.BlazarClientException(body, code=resp.status_code)
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return resp, body
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class SessionClient(adapter.LegacyJsonAdapter):
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"""Manager to create request with keystoneauth1 session."""
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def request(self, url, method, **kwargs):
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resp, body = super(SessionClient, self).request(
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url, method, raise_exc=False, **kwargs)
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if resp.status_code >= 400:
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if body is not None:
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error_message = body.get('error_message', body)
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else:
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error_message = resp.text
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msg = _("ERROR: {0}").format(error_message)
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raise exception.BlazarClientException(msg, code=resp.status_code)
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return resp, body
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class BaseClientManager(object):
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"""Base class for managing resources of Blazar."""
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user_agent = 'python-blazarclient'
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def __init__(self, blazar_url, auth_token, session, **kwargs):
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self.blazar_url = blazar_url
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self.auth_token = auth_token
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self.session = session
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if self.session:
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self.request_manager = SessionClient(
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session=self.session,
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user_agent=self.user_agent,
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**kwargs
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)
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elif self.blazar_url and self.auth_token:
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self.request_manager = RequestManager(blazar_url=self.blazar_url,
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auth_token=self.auth_token,
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user_agent=self.user_agent)
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else:
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raise exception.InsufficientAuthInformation
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