140 lines
4.3 KiB
Python
140 lines
4.3 KiB
Python
# Copyright 2016 99cloud, Inc.
|
|
# 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 six.moves import http_client
|
|
|
|
from valenceclient.common.i18n import _
|
|
|
|
|
|
class ClientException(Exception):
|
|
"""The base exception class for all exceptions this library raises"""
|
|
|
|
message = _("ClientException")
|
|
|
|
|
|
class HttpError(ClientException):
|
|
"""The base exception class of 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.message = message or self.message
|
|
self.details = details
|
|
self.response = response
|
|
self.request_id = request_id
|
|
self.url = url
|
|
self.method = method
|
|
self.http_status = http_status
|
|
|
|
formatted_string = "%s (HTTP %s)" % (self.message, self.http_status)
|
|
if request_id:
|
|
formatted_string += " (Request-ID: %s)" % (self.request_id)
|
|
|
|
super(HttpError, self).__init__(formatted_string)
|
|
|
|
|
|
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")
|
|
|
|
|
|
# _code_map cotains all the classes that have http_status attribute
|
|
_code_map = dict((getattr(obj, 'http_status', None), obj)
|
|
for name, obj in vars(sys.modules[__name__]).items()
|
|
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')
|
|
|
|
kwages = {
|
|
'http_status': response.status_code,
|
|
'response': response,
|
|
'method': method,
|
|
'url': url,
|
|
'request_id': req_id
|
|
}
|
|
|
|
if 'retry_after' in response.headers:
|
|
kwages['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):
|
|
error = body.get(list(body)[0])
|
|
if isinstance(error, dict):
|
|
kwages['message'] = (error.get('message') or
|
|
error.get('faultstring'))
|
|
kwages['details'] = (error.get('details') or
|
|
six.text_type(body))
|
|
elif content_type.startswith("text/"):
|
|
kwages['details'] = getattr(response, 'text', '')
|
|
|
|
try:
|
|
cls = _code_map[response.status_code]
|
|
except KeyError:
|
|
# 5XX status codes are server errors
|
|
if response.status_code >= http_client.INTERNAL_SERVER_ERROR:
|
|
cls = HttpServerError
|
|
# 4XX status codes are client request errors
|
|
elif (http_client.BAD_REQUEST <= response.status_code <
|
|
http_client.INTERNAL_SERVER_ERROR):
|
|
cls = HTTPClientError
|
|
else:
|
|
cls = HttpError
|
|
|
|
return cls
|