Source code for azure.core.exceptions

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import json
import logging
import sys

from typing import Callable, Any, Dict, Optional, List, Union, 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
    exc_msg = "{}, {}: {}".format(message, exc_type.__name__, exc_value)  # type: ignore
    error = exception(exc_msg, *args, **kwargs)
    try:
        raise error.with_traceback(exc_traceback)
    except AttributeError:
        error.__traceback__ = exc_traceback
        raise 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.""" 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) # type: ignore self.message = str(message) 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"""
[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 status_code: HttpResponse's status code :type status_code: int :ivar response: The response that triggered the exception. :type response: ~azure.core.pipeline.transport.HttpResponse or ~azure.core.pipeline.transport.AsyncHttpResponse """ def __init__(self, message=None, response=None, **kwargs): self.reason = None self.status_code = None self.response = response if response: self.reason = response.reason self.status_code = response.status_code message = message or "Operation returned an invalid status '{}'".format(self.reason) try: try: if self.error.error.code or self.error.error.message: message = "({}) {}".format( self.error.error.code, self.error.error.message) except AttributeError: if self.error.message: #pylint: disable=no-member message = self.error.message #pylint: disable=no-member except AttributeError: # Exception will only have an error if it has been deserialized from # generated code. We should add the empty attribute if it's not present. if not hasattr(self, 'error'): self.error = None super(HttpResponseError, self).__init__(message=message, **kwargs)
[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 ODataV4Format(object): """Class to describe OData V4 error format. http://docs.oasis-open.org/odata/odata-json-format/v4.0/os/odata-json-format-v4.0-os.html#_Toc372793091 :param dict json_object: A Python dict representing a ODataV4 JSON :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. """ def __init__(self, json_object): # Required fields, but assume they could be missing still to be robust self.code = json_object.get("code") # type: Optional[str] self.message = json_object.get("message") # type: Optional[str] # Optional fields self.target = json_object.get("target", None) # type: Optional[str] # details is recursive of this very format self.details = [ self.__class__(detail_node) for detail_node in json_object.get("details", []) ] # type: List[ODataV4Format] self.innererror = json_object.get("innererror", {}) # type: Dict[str, Any] def __str__(self): error_str = "Code: {}".format(self.code) error_str += "\nMessage: {}".format(self.message) if self.target: error_str += "\nTarget: {}".format(self.target) if self.details: error_str += "\nException Details:" for error_obj in self.details: # Indent for visibility error_str += "\n".join("\t" + s for s in str(error_obj).splitlines()) if self.innererror: error_str += "\nInner error: {}".format( json.dumps(self.innererror, indent=4) ) return error_str
[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__()