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"""
Exception definitions.
"""
class CommandError(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 SchemaNotFound(KeyError):
"""Could not find schema"""
pass
class InvalidEndpoint(ValueError):
"""The provided endpoint could not be used"""
pass
class ClientException(Exception):
"""
The base exception class for all exceptions this library raises.
"""
def __init__(self, code, message=None, details=None):
self.code = code
self.message = message or self.__class__.message
self.details = details
def __str__(self):
return "%s (HTTP %s)" % (self.message, self.code)
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 Conflict(ClientException):
"""
HTTP 409 - Conflict
"""
http_status = 409
message = "Conflict"
class OverLimit(ClientException):
"""
HTTP 413 - Over limit: you're over the API limits for this time period.
"""
http_status = 413
message = "Over limit"
class InternalServerError(ClientException):
"""
HTTP 500 - Internal Server Error
"""
http_status = 500
message = "Internal Server Error"
# 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"
class ServiceUnavailable(ClientException):
"""
HTTP 503 - Service Unavailable
"""
http_status = 503
message = "Service Unavailable"
# 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:
_exc_list = [BadRequest, Unauthorized, Forbidden, NotFound, OverLimit,
InternalServerError, HTTPNotImplemented, ServiceUnavailable]
_code_map = dict((c.http_status, c) for c in _exc_list)
def from_response(response):
"""Return an instance of an ClientException based on httplib response."""
cls = _code_map.get(response.status, ClientException)
return cls(code=response.status)
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