151 lines
3.8 KiB
Python
151 lines
3.8 KiB
Python
# Copyright 2010 Jacob Kaplan-Moss
|
|
"""
|
|
Exception definitions.
|
|
"""
|
|
|
|
|
|
class UnsupportedVersion(Exception):
|
|
"""Indicates that the user is trying to use an unsupported
|
|
version of the API"""
|
|
pass
|
|
|
|
|
|
class CommandError(Exception):
|
|
pass
|
|
|
|
|
|
class AuthorizationFailure(Exception):
|
|
pass
|
|
|
|
|
|
class NoUniqueMatch(Exception):
|
|
pass
|
|
|
|
|
|
class NoTokenLookupException(Exception):
|
|
"""This form of authentication does not support looking up
|
|
endpoints from an existing token."""
|
|
pass
|
|
|
|
|
|
class EndpointNotFound(Exception):
|
|
"""Could not find Service or Region in Service Catalog."""
|
|
pass
|
|
|
|
|
|
class AmbiguousEndpoints(Exception):
|
|
"""Found more than one matching endpoint in Service Catalog."""
|
|
def __init__(self, endpoints=None):
|
|
self.endpoints = endpoints
|
|
|
|
def __str__(self):
|
|
return "AmbiguousEndpoints: %s" % repr(self.endpoints)
|
|
|
|
|
|
class ClientException(Exception):
|
|
"""
|
|
The base exception class for all exceptions this library raises.
|
|
"""
|
|
def __init__(self, code, message=None, details=None, request_id=None):
|
|
self.code = code
|
|
self.message = message or self.__class__.message
|
|
self.details = details
|
|
self.request_id = request_id
|
|
|
|
def __str__(self):
|
|
formatted_string = "%s (HTTP %s)" % (self.message, self.code)
|
|
if self.request_id:
|
|
formatted_string += " (Request-ID: %s)" % self.request_id
|
|
|
|
return formatted_string
|
|
|
|
|
|
class BadRequest(ClientException):
|
|
"""
|
|
HTTP 400 - Bad request: you sent some malformed data.
|
|
"""
|
|
http_status = 400
|
|
message = "Bad request"
|
|
|
|
|
|
class Unauthorized(ClientException):
|
|
"""
|
|
HTTP 401 - Unauthorized: bad credentials.
|
|
"""
|
|
http_status = 401
|
|
message = "Unauthorized"
|
|
|
|
|
|
class Forbidden(ClientException):
|
|
"""
|
|
HTTP 403 - Forbidden: your credentials don't give you access to this
|
|
resource.
|
|
"""
|
|
http_status = 403
|
|
message = "Forbidden"
|
|
|
|
|
|
class NotFound(ClientException):
|
|
"""
|
|
HTTP 404 - Not found
|
|
"""
|
|
http_status = 404
|
|
message = "Not found"
|
|
|
|
|
|
class OverLimit(ClientException):
|
|
"""
|
|
HTTP 413 - Over limit: you're over the API limits for this time period.
|
|
"""
|
|
http_status = 413
|
|
message = "Over limit"
|
|
|
|
|
|
# NotImplemented is a python keyword.
|
|
class HTTPNotImplemented(ClientException):
|
|
"""
|
|
HTTP 501 - Not Implemented: the server does not support this operation.
|
|
"""
|
|
http_status = 501
|
|
message = "Not Implemented"
|
|
|
|
|
|
# In Python 2.4 Exception is old-style and thus doesn't have a __subclasses__()
|
|
# so we can do this:
|
|
# _code_map = dict((c.http_status, c)
|
|
# for c in ClientException.__subclasses__())
|
|
#
|
|
# Instead, we have to hardcode it:
|
|
_code_map = dict((c.http_status, c) for c in [BadRequest, Unauthorized,
|
|
Forbidden, NotFound,
|
|
OverLimit, HTTPNotImplemented])
|
|
|
|
|
|
def from_response(response, body):
|
|
"""
|
|
Return an instance of an ClientException or subclass
|
|
based on an requests response.
|
|
|
|
Usage::
|
|
|
|
resp, body = requests.request(...)
|
|
if resp.status_code != 200:
|
|
raise exception_from_response(resp, rest.text)
|
|
"""
|
|
cls = _code_map.get(response.status_code, ClientException)
|
|
if response.headers:
|
|
request_id = response.headers.get('x-compute-request-id')
|
|
else:
|
|
request_id = None
|
|
if body:
|
|
message = "n/a"
|
|
details = "n/a"
|
|
if hasattr(body, 'keys'):
|
|
error = body[body.keys()[0]]
|
|
message = error.get('message', None)
|
|
details = error.get('details', None)
|
|
return cls(code=response.status_code, message=message, details=details,
|
|
request_id=request_id)
|
|
else:
|
|
return cls(code=response.status_code, request_id=request_id)
|