Azure Core Library

Azure core library defines basic exceptions and shared modules those are needed when you use client libraries. If you are a client library developer, please reference client library developer reference for more information.

Azure Core Library Exceptions

AzureError

AzureError is the base exception for all errors.

class AzureError(Exception):
    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)

message is any message (str) to be associated with the exception.

args are any additional args to be included with exception.

kwargs are keyword arguments to include with the exception. Use the keyword error to pass in an internal exception.

The following exceptions inherit from AzureError:

ServiceRequestError

An error occurred while attempt to make a request to the service. No request was sent.

ServiceResponseError

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.

HttpResponseError

A request was made, and a non-success status code was received from the service.

class HttpResponseError(AzureError):
    def __init__(self, message=None, response=None, **kwargs):
        self.reason = None
        self.response = response
        if response:
            self.reason = response.reason
        message = "Operation returned an invalid status code '{}'".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:
            pass
        super(HttpResponseError, self).__init__(message=message, **kwargs)

message is the HTTP response error message (optional)

response is the HTTP response (optional).

kwargs are keyword arguments to include with the exception.

The following exceptions inherit from HttpResponseError:

DecodeError

An error raised during response deserialization.

ResourceExistsError

An error response with status code 4xx. This will not be raised directly by the Azure core pipeline.

ResourceNotFoundError

An error response, typically triggered by a 412 response (for update) or 404 (for get/post).

ClientAuthenticationError

An error response with status code 4xx. This will not be raised directly by the Azure core pipeline.

ResourceModifiedError

An error response with status code 4xx, typically 412 Conflict. This will not be raised directly by the Azure core pipeline.

ResourceNotModifiedError

An error response with status code 304. This will not be raised directly by the Azure core pipeline.

TooManyRedirectsError

An error raised when the maximum number of redirect attempts is reached. The maximum amount of redirects can be configured in the RedirectPolicy.

class TooManyRedirectsError(HttpResponseError):
    def __init__(self, history, *args, **kwargs):
        self.history = history
        message = "Reached maximum redirect attempts."
        super(TooManyRedirectsError, self).__init__(message, *args, **kwargs)

history is used to document the requests/responses that resulted in redirected requests.

args are any additional args to be included with exception.

kwargs are keyword arguments to include with the exception.

Shared modules

MatchConditions

An enum to describe match conditions.

Contributing

This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information, see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Release History

2019-10-29 Version 1.0.0

Features

• Tracing: DistributedTracingPolicy now accepts kwargs network_span_namer to change network span name #7773
• Tracing: Implementation of AbstractSpan can now use the mixin HttpSpanMixin to get HTTP span update automatically #7773
• Tracing: AbstractSpan contract "change_context" introduced #7773
• Introduce new policy HttpLoggingPolicy #7988

Bug fixes

• Fix AsyncioRequestsTransport if input stream is an async generator #7743
• Fix form-data with aiohttp transport #7749

Breaking changes

• Tracing: AbstractSpan.set_current_span is longer supported. Use change_context instead. #7773
• azure.core.pipeline.policies.ContentDecodePolicy.deserialize_from_text changed

2019-10-07 Version 1.0.0b4

Features

• Tracing: network span context is available with the TRACING_CONTEXT in pipeline response #7252

• Tracing: Span contract now has kind, traceparent and is a context manager #7252

• SansIOHTTPPolicy methods can now be coroutines #7497

• Add multipart/mixed support #7083:

  • HttpRequest now has a "set_multipart_mixed" method to set the parts of this request
  • HttpRequest now has a "prepare_multipart_body" method to build final body.
  • HttpResponse now has a "parts" method to return an iterator of parts
  • AsyncHttpResponse now has a "parts" methods to return an async iterator of parts
  • Note that multipart/mixed is a Python 3.x only feature

Bug fixes

• Tracing: policy cannot fail the pipeline, even in the worst condition #7252
• Tracing: policy pass correctly status message if exception #7252
• Tracing: incorrect span if exception raised from decorated function #7133
• Fixed urllib3 ConnectTimeoutError being raised by Requests during a socket timeout. Now this exception is caught and wrapped as a ServiceRequestError #7542

Breaking changes

• Tracing: azure.core.tracing.context removed

• Tracing: azure.core.tracing.context.tracing_context.with_current_context renamed to azure.core.tracing.common.with_current_context #7252

• Tracing: link renamed link_from_headers and link takes now a string

• Tracing: opencensus implementation has been moved to the package azure-core-tracing-opencensus

• Some modules and classes that were importables from several differente places have been removed:

  • azure.core.HttpResponseError is now only azure.core.exceptions.HttpResponseError
  • azure.core.Configuration is now only azure.core.configuration.Configuration
  • azure.core.HttpRequest is now only azure.core.pipeline.transport.HttpRequest
  • azure.core.version module has been removed. Use azure.core.__version__ to get version number.
  • azure.core.pipeline_client has been removed. Import from azure.core instead.
  • azure.core.pipeline_client_async has been removed. Import from azure.core instead.
  • azure.core.pipeline.base has been removed. Import from azure.core.pipeline instead.
  • azure.core.pipeline.base_async has been removed. Import from azure.core.pipeline instead.
  • azure.core.pipeline.policies.base has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.base_async has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.authentication has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.authentication_async has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.custom_hook has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.redirect has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.redirect_async has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.retry has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.retry_async has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.distributed_tracing has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.pipeline.policies.universal has been removed. Import from azure.core.pipeline.policies instead.
  • azure.core.tracing.abstract_span has been removed. Import from azure.core.tracing instead.
  • azure.core.pipeline.transport.base has been removed. Import from azure.core.pipeline.transport instead.
  • azure.core.pipeline.transport.base_async has been removed. Import from azure.core.pipeline.transport instead.
  • azure.core.pipeline.transport.requests_basic has been removed. Import from azure.core.pipeline.transport instead.
  • azure.core.pipeline.transport.requests_asyncio has been removed. Import from azure.core.pipeline.transport instead.
  • azure.core.pipeline.transport.requests_trio has been removed. Import from azure.core.pipeline.transport instead.
  • azure.core.pipeline.transport.aiohttp has been removed. Import from azure.core.pipeline.transport instead.
  • azure.core.polling.poller has been removed. Import from azure.core.polling instead.
  • azure.core.polling.async_poller has been removed. Import from azure.core.polling instead.

2019-09-09 Version 1.0.0b3

Bug fixes

• Fix aiohttp auto-headers #6992
• Add tracing to policies module init #6951

2019-08-05 Version 1.0.0b2

Breaking changes

• Transport classes don't take config parameter anymore (use kwargs instead) #6372
• azure.core.paging has been completely refactored #6420
• HttpResponse.content_type attribute is now a string (was a list) #6490
• For StreamDownloadGenerator subclasses, response is now an HttpResponse, and not a transport response like aiohttp.ClientResponse or requests.Response. The transport response is available in internal_response attribute #6490

Bug fixes

• aiohttp is not required to import async pipelines classes #6496
• AsyncioRequestsTransport.sleep is now a coroutine as expected #6490
• RequestsTransport is not tight to ProxyPolicy implementation details anymore #6372
• AiohttpTransport does not raise on unexpected kwargs #6355

Features

• New paging base classes that support continuation_token and by_page() #6420
• Proxy support for AiohttpTransport #6372

2019-06-26 Version 1.0.0b1

• Preview 1 release