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import json
import logging
import sys
from typing import Callable, Any, Dict, Optional, List, Union, Type, TYPE_CHECKING
_LOGGER = logging.getLogger(__name__)
if TYPE_CHECKING:
from azure.core.pipeline.transport._base import _HttpResponseBase
__all__ = [
"AzureError",
"ServiceRequestError",
"ServiceResponseError",
"HttpResponseError",
"DecodeError",
"ResourceExistsError",
"ResourceNotFoundError",
"ClientAuthenticationError",
"ResourceModifiedError",
"ResourceNotModifiedError",
"TooManyRedirectsError",
"ODataV4Format",
"ODataV4Error",
]
def raise_with_traceback(exception, *args, **kwargs):
# type: (Callable, Any, Any) -> None
"""Raise exception with a specified traceback.
This MUST be called inside a "except" clause.
:param Exception exception: Error type to be raised.
:param args: Any additional args to be included with exception.
:keyword str message: Message to be associated with the exception. If omitted, defaults to an empty string.
"""
message = kwargs.pop("message", "")
exc_type, exc_value, exc_traceback = sys.exc_info()
# If not called inside a "except", exc_type will be None. Assume it will not happen
if exc_type is None:
raise ValueError("raise_with_traceback can only be used in except clauses")
exc_msg = "{}, {}: {}".format(message, exc_type.__name__, exc_value)
error = exception(exc_msg, *args, **kwargs)
try:
raise error.with_traceback(exc_traceback)
except AttributeError:
error.__traceback__ = exc_traceback
raise error
class ErrorMap(object):
"""Error Map class. To be used in map_error method, behaves like a dictionary.
It returns the error type if it is found in custom_error_map. Or return default_error
:param dict custom_error_map: User-defined error map, it is used to map status codes to error types.
:keyword error default_error: Default error type. It is returned if the status code is not found in custom_error_map
"""
def __init__(self, custom_error_map=None, **kwargs):
self._custom_error_map = custom_error_map or {}
self._default_error = kwargs.pop("default_error", None)
def get(self, key):
ret = self._custom_error_map.get(key)
if ret:
return ret
return self._default_error
def map_error(status_code, response, error_map):
if not error_map:
return
error_type = error_map.get(status_code)
if not error_type:
return
error = error_type(response=response)
raise error
[docs]class AzureError(Exception):
"""Base exception for all errors.
:param message: The message object stringified as 'message' attribute
:keyword error: The original exception if any
:paramtype error: Exception
:ivar inner_exception: The exception passed with the 'error' kwarg
:vartype inner_exception: Exception
:ivar exc_type: The exc_type from sys.exc_info()
:ivar exc_value: The exc_value from sys.exc_info()
:ivar exc_traceback: The exc_traceback from sys.exc_info()
:ivar exc_msg: A string formatting of message parameter, exc_type and exc_value
:ivar str message: A stringified version of the message parameter
:ivar str continuation_token: A token reference to continue an incomplete operation. This value is optional
and will be `None` where continuation is either unavailable or not applicable.
"""
def __init__(self, message, *args, **kwargs):
self.inner_exception = kwargs.get("error")
self.exc_type, self.exc_value, self.exc_traceback = sys.exc_info()
self.exc_type = (
self.exc_type.__name__ if self.exc_type else type(self.inner_exception)
)
self.exc_msg = "{}, {}: {}".format(message, self.exc_type, self.exc_value)
self.message = str(message)
self.continuation_token = kwargs.get('continuation_token')
super(AzureError, self).__init__(self.message, *args)
[docs] def raise_with_traceback(self):
try:
raise super(AzureError, self).with_traceback(self.exc_traceback)
except AttributeError:
self.__traceback__ = self.exc_traceback
raise self
[docs]class ServiceRequestError(AzureError):
"""An error occurred while attempt to make a request to the service.
No request was sent.
"""
[docs]class ServiceResponseError(AzureError):
"""The request was sent, but the client failed to understand the response.
The connection may have timed out. These errors can be retried for idempotent or
safe operations"""
class ServiceRequestTimeoutError(ServiceRequestError):
"""Error raised when timeout happens"""
class ServiceResponseTimeoutError(ServiceResponseError):
"""Error raised when timeout happens"""
[docs]class HttpResponseError(AzureError):
"""A request was made, and a non-success status code was received from the service.
:param message: HttpResponse's error message
:type message: string
:param response: The response that triggered the exception.
:type response: ~azure.core.pipeline.transport.HttpResponse or ~azure.core.pipeline.transport.AsyncHttpResponse
:ivar reason: The HTTP response reason
:vartype reason: str
:ivar status_code: HttpResponse's status code
:vartype status_code: int
:ivar response: The response that triggered the exception.
:vartype response: ~azure.core.pipeline.transport.HttpResponse or ~azure.core.pipeline.transport.AsyncHttpResponse
:ivar model: The request body/response body model
:vartype model: ~msrest.serialization.Model
:ivar error: The formatted error
:vartype error: ODataV4Format
"""
def __init__(self, message=None, response=None, **kwargs):
# Don't want to document this one yet.
error_format = kwargs.get("error_format", ODataV4Format)
self.reason = None
self.status_code = None
self.response = response
if response:
self.reason = response.reason
self.status_code = response.status_code
# old autorest are setting "error" before calling __init__, so it might be there already
# transferring into self.model
model = kwargs.pop("model", None) # type: Optional[msrest.serialization.Model]
if model is not None: # autorest v5
self.model = model
else: # autorest azure-core, for KV 1.0, Storage 12.0, etc.
self.model = getattr(
self, "error", None
) # type: Optional[msrest.serialization.Model]
self.error = self._parse_odata_body(error_format, response) # type: Optional[ODataV4Format]
# By priority, message is:
# - odatav4 message, OR
# - parameter "message", OR
# - generic meassage using "reason"
if self.error:
message = str(self.error)
else:
message = message or "Operation returned an invalid status '{}'".format(
self.reason
)
super(HttpResponseError, self).__init__(message=message, **kwargs)
@staticmethod
def _parse_odata_body(error_format, response):
# type: (Type[ODataV4Format], _HttpResponseBase) -> Optional[ODataV4Format]
try:
odata_json = json.loads(response.text())
return error_format(odata_json)
except Exception: # pylint: disable=broad-except
# If the body is not JSON valid, just stop now
pass
return None
[docs]class DecodeError(HttpResponseError):
"""Error raised during response deserialization."""
[docs]class ResourceExistsError(HttpResponseError):
"""An error response with status code 4xx.
This will not be raised directly by the Azure core pipeline."""
[docs]class ResourceNotFoundError(HttpResponseError):
""" An error response, typically triggered by a 412 response (for update) or 404 (for get/post)
"""
[docs]class ClientAuthenticationError(HttpResponseError):
"""An error response with status code 4xx.
This will not be raised directly by the Azure core pipeline."""
[docs]class ResourceModifiedError(HttpResponseError):
"""An error response with status code 4xx, typically 412 Conflict.
This will not be raised directly by the Azure core pipeline."""
[docs]class ResourceNotModifiedError(HttpResponseError):
"""An error response with status code 304.
This will not be raised directly by the Azure core pipeline."""
[docs]class TooManyRedirectsError(HttpResponseError):
"""Reached the maximum number of redirect attempts."""
def __init__(self, history, *args, **kwargs):
self.history = history
message = "Reached maximum redirect attempts."
super(TooManyRedirectsError, self).__init__(message, *args, **kwargs)
[docs]class ODataV4Error(HttpResponseError):
"""An HTTP response error where the JSON is decoded as OData V4 error format.
http://docs.oasis-open.org/odata/odata-json-format/v4.0/os/odata-json-format-v4.0-os.html#_Toc372793091
:ivar dict odata_json: The parsed JSON body as attribute for convenience.
:ivar str ~.code: Its value is a service-defined error code.
This code serves as a sub-status for the HTTP error code specified in the response.
:ivar str message: Human-readable, language-dependent representation of the error.
:ivar str target: The target of the particular error (for example, the name of the property in error).
This field is optional and may be None.
:ivar list[ODataV4Format] details: Array of ODataV4Format instances that MUST contain name/value pairs
for code and message, and MAY contain a name/value pair for target, as described above.
:ivar dict innererror: An object. The contents of this object are service-defined.
Usually this object contains information that will help debug the service.
"""
_ERROR_FORMAT = ODataV4Format
def __init__(self, response, **kwargs):
# type: (_HttpResponseBase, Any) -> None
# Ensure field are declared, whatever can happen afterwards
self.odata_json = None # type: Optional[Dict[str, Any]]
try:
self.odata_json = json.loads(response.text())
odata_message = self.odata_json.setdefault("error", {}).get("message")
except Exception: # pylint: disable=broad-except
# If the body is not JSON valid, just stop now
odata_message = None
self.code = None # type: Optional[str]
self.message = kwargs.get("message", odata_message) # type: Optional[str]
self.target = None # type: Optional[str]
self.details = [] # type: Optional[List[Any]]
self.innererror = {} # type: Optional[Dict[str, Any]]
if self.message and "message" not in kwargs:
kwargs["message"] = self.message
super(ODataV4Error, self).__init__(response=response, **kwargs)
self._error_format = None # type: Optional[Union[str, ODataV4Format]]
if self.odata_json:
try:
error_node = self.odata_json["error"]
self._error_format = self._ERROR_FORMAT(error_node)
self.__dict__.update(
{
k: v
for k, v in self._error_format.__dict__.items()
if v is not None
}
)
except Exception: # pylint: disable=broad-except
_LOGGER.info("Received error message was not valid OdataV4 format.")
self._error_format = "JSON was invalid for format " + str(
self._ERROR_FORMAT
)
def __str__(self):
if self._error_format:
return str(self._error_format)
return super(ODataV4Error, self).__str__()