Change log#

4.0.0 (unreleased)#

Backwards-incompatible changes#

  • Safir now requires a minimum Python version of 3.11.

  • safir.pydantic.validate_exactly_one_of is now a Pydantic root validator instead of an individual field validator, which simplifies how it should be called.

  • Custom Kubernetes objects are no longer copied before being stored in the Kubernetes mock by create_namespaced_custom_object, and no longer automatically get a metadata.uid value. This brings handling of custom objects in line with the behavior of other mocked create_* and replace_* APIs.

  • All objects stored in the Kubernetes mock will be modified to set api_version, kind, and (where appropriate) namespace. If any of those values are set in the object, they are checked for correctness and rejected with AssertionError if they don’t match the API call and its parameters.

  • The mocked create_* Kubernetes APIs now use the name body for the parameter containing the API object, instead of using some other name specific to the kind of object. This fixes compatibility with the Python Kubernetes API that this class is mocking.

New features#

  • The new safir.redis.PydanticRedisStorage class enables you to store Pydantic model objects in Redis. A safir.redis.EncryptedPydanticRedisStorage class also encrypts data in Redis. To use the safir.redis module, install Safir with the redis extra (i.e., pip install safir[redis]).

  • Add safir.fastapi.ClientRequestError base class for exceptions and the corresponding exception handler safir.fastapi.client_request_error_handler. These may be used together to raise structured exceptions and automatically transform them into structured HTTP errors with the correct HTTP status code and an error body compatible with safir.models.ErrorModel and FastAPI’s own internally-generated errors.

  • Add safir.slack.webhook.SlackWebException, which is a child class of safir.slack.webhook.SlackException that knows how to capture and report details from an underlying HTTPX exception.

  • Add a safir.testing.kubernetes.strip_none helper function that makes it easier to compare Kubernetes objects against expected test data.

  • Add a get_namespace_objects_for_test method to the Kubernetes mock to retreive all objects (of any kind) in a namespace.

  • Add a mock for the list_nodes Kubernetes API, which returns data set by a call to the new set_nodes_for_test method.

  • Add optional rudimentary namespace tracking to the Kubernetes mock. Namespaces can be created, deleted (which deletes all objects in the namespace), read, and listed. Explicit namespace creation remains optional; if an object is created in a namespace and that namespace does not exist, one will be implicitly created by the mock.

  • Add support for namespaced events (the older core API, not the new events API) to the Kubernetes mock. Newly-created pods with the default initial status post an event by default; otherwise, events must be created by calling the mocked create_namespaced_event API. The list_namespaced_event API supports watches with timeouts.

  • Add rudimentary support for NetworkPolicy, ResourceQuota, and Service objects to the Kubernetes mock.

  • Add a safir.github module for writing GitHub integrations with GidgetHub and Pydantic modeling. safir.github.GitHubAppClientFactory helps create authenticated clients for GitHub Apps and app installations. safir.github.models contains Pydantic models for GitHub v3 REST API resources. safir.github.webhooks contains Pydantic models for GitHub webhook payloads.

Bug fixes#

  • Stop adding the X-Auth-Request-User header to the OpenAPI schema for routes that use auth_dependency or auth_logger_dependency.

Other changes#

  • The safir.testing.kubernetes.MockKubernetesApi mock now has rudimentary API documentation for the Kubernetes APIs that it supports.

  • The documentation for running commands with tox has been updated for the new command-line syntax in tox v4.

3.8.0 (2023-03-15)#

New features#

  • Add safir.slack.webhook.SlackWebhookClient and accompanying models to post a structured message to Slack via an incoming webhook. Add a safir.slack.blockkit.SlackException base class that can be used to create exceptions with supplemental metadata that can be sent to Slack as a formatted alert.

  • Add a FastAPI route class (safir.slack.webhook.SlackRouteErrorHandler) that reports all uncaught exceptions to Slack using an incoming webhook.

  • Add safir.datetime.format_datetime_for_logging to convert a datetime object into an easily human-readable representation.

  • Add safir.testing.slack.mock_slack_webhook and an associated mock class to mock a Slack webhook for testing.

  • Add microseconds=True parameter to safir.datetime.current_datetime to get a datetime object with microseconds filled in. By default, current_datetime suppresses the microseconds since databases often cannot store them, but there are some timestamp uses, such as error reporting, that benefit from microseconds and are never stored in databases.

3.7.0 (2023-03-06)#

New features#

  • Add a safir.testing.uvicorn.spawn_uvicorn helper function to spawn an ASGI app under an external Uvicorn process. Normally, ASGI apps should be tested by passing the app directly to an httpx.AsyncClient, but in some cases (such as Selenium testing) the app needs to listen to regular HTTP requests.

  • safir.database.initialize_database now creates a non-default schema if the underlying SQLAlchemy model declares one.

Bug fixes#

  • After safir.logging.configure_uvicorn_logging was called, exception tracebacks were no longer expanded. Add the missing processor to the logging stack.

  • In safir.logging.configure_uvicorn_logging, send the access log to standard output instead of combining it with all other messages on standard error.

3.6.0 (2023-02-03)#

New features#

  • Add a safir.models.ErrorLocation enum holding valid values for the first element of the loc array in safir.models.ErrorModel. Due to limitations in Python typing, loc is not type-checked against this enum, but it may be useful to applications constructing FastAPI-compatible error messages.

  • Add safir.datetime.current_datetime to get a normalized datetime object representing the current date and time.

  • Add safir.datetime.isodatetime and safir.datetime.parse_isodatetime to convert to and from the most useful form of ISO 8601 dates, used by both Kubernetes and the IVOA UWS standard. Also add safir.pydantic.normalize_isodatetime to accept only that same format as input to a Pydantic model with a datetime field.

3.5.0 (2023-01-12)#

New features#

  • Add new helper class safir.gcs.SignedURLService to generate signed URLs to Google Cloud Storage objects using workload identity. To use this class, depend on safir[gcs].

  • Add the safir.testing.gcs module, which can be used to mock the Google Cloud Storage API for testing. To use this module, depend on safir[gcs].

  • Add new helper class safir.pydantic.CamelCaseModel, which is identical to pydantic.BaseModel except with configuration added to accept camel-case keys using the safir.pydantic.to_camel_case alias generator and overrides of dict and json to export in camel-case by default.

3.4.0 (2022-11-29)#

New features#

  • safir.logging.configure_logging and safir.logging.configure_uvicorn_logging now accept Profile and LogLevel enums in addition to strings for the profile and log_level parameters. The new enums are preferred. Support for enums was added in preparation for changing the FastAPI template to use pydantic.BaseSettings for its Configuration class and validate the values of the profile and log_level configuration parameters.

  • Add new function safir.pydantic.normalize_datetime, which can be used as a Pydantic validator for datetime fields. It also allows seconds since epoch as input, and ensures that the resulting datetime field in the model is timezone-aware and in UTC.

  • Add new function safir.pydantic.to_camel_case, which can be used as a Pydantic alias generator when a model needs to accept attributes with camel-case names.

  • Add new function safir.pydantic.validate_exactly_one_of, which can be used as a model validator to ensure that exactly one of a list of fields was set to a value other than None.

Bug fixes#

  • In safir.testing.kubernetes.patch_kubernetes, correctly apply a spec to the mock of kubernetes_asyncio.client.ApiClient. Due to an ordering bug in previous versions, the spec was previously a mock object that didn’t apply any constraints.

3.3.0 (2022-09-15)#

New features#

  • Add new function safir.logging.configure_uvicorn_logging that routes Uvicorn logging through structlog for consistent formatting. It also adds context to Uvicorn logs in the format recognized by Google’s Cloud Logging.

  • Support the newer project metadata structure and URL naming used by pyproject.toml-only packages in safir.metadata.get_metadata.

3.2.0 (2022-05-13)#

New features#

  • New support for arq, the Redis-based asyncio distributed queue package. The safir.arq module provides an arq client and metadata/result data classes with a mock implementation for testing. The FastAPI dependency, safir.dependencies.arq.arq_dependency, provides a convenient way to use the arq client from HTTP handlers.

3.1.0 (2022-06-01)#

New features#

  • Add new FastAPI middleware CaseInsensitiveQueryMiddleware to aid in implementing the IVOA protocol requirement that the keys of query parameters be case-insensitive.

3.0.3 (2022-05-16)#

Bug fixes#

  • Correctly handle the possibility that request.client is None.

3.0.2 (2022-03-25)#

Bug fixes#

  • Fix handling of passwords containing special characters such as @ and / in safir.database.

3.0.1 (2022-02-24)#

Bug fixes#

  • safir.database retains the port in the database URL, if provided.

3.0.0 (2022-02-23)#

Backward-incompatible changes#

  • XForwardedMiddleware no longer sets forwarded_proto in the request state and instead directly updates the request scope so that subsequent handlers and middleware believe the request scheme is that given by an X-Forwarded-Proto header. This fixes the scheme returned by other request methods and attributes such as url_for in cases where the service is behind an ingress that terminates TLS.

New features#

  • Add new FastAPI dependencies auth_dependency and auth_logger_dependency from the safir.dependencies.gafaelfawr module. auth_dependency returns the username of the user authenticated via Gafaelfawr (pulled from the X-Auth-Request-User header. auth_logger_dependency returns the same logger as logger_dependency but with the user parameter bound to the username from auth_dependency.

  • Add utility functions to initialize a database and create a sync or async session. The session creation functions optionally support a health check to ensure the database schema has been initialized.

  • Add new FastAPI dependency db_session_dependency that creates a task-local async SQLAlchemy session.

  • Add utility functions datetime_from_db and datetime_to_db to convert between timezone-naive UTC datetimes stored in a database and timezone-aware UTC datetimes used elsewhere in a program.

  • Add a run_with_async decorator that runs the decorated async function synchronously. This is primarily useful for decorating Click command functions (for a command-line interface) that need to make async calls.

2.4.2 (2022-01-24)#

New features#

  • Add a very basic and limited implementation of list_namespaced_pod to safir.testing.kubernetes.

2.4.1 (2022-01-14)#

Bug fixes#

  • In the Kubernetes mock API, change the expected body for patch_namespaced_custom_object_status to reflect the need to send a JSON patch for the entirety of the /status path in order to work around a kubernetes_asyncio bug.

2.4.0 (2022-01-13)#

New features#

  • Add an initialize_kubernetes helper function to load Kubernetes configuration. Add the safir.testing.kubernetes module, which can be used to mock the Kubernetes API for testing. To use the new Kubernetes support, depend on safir[kubernetes].

2.3.0 (2021-12-13)#

New features#

  • When logging in JSON format, use severity instead of level for the log level for compatibility with Google Log Explorer.

  • In the FastAPI logger_dependency, add log information about the incoming requst in a format compatible with Google Log Explorer.

2.2.0 (2021-11-09)#

Bug fixes#

  • Restore previous http_client_dependency behavior by enabling following redirects by default. This adjusts for the change of defaults in HTTPX 0.20.0.

2.1.1 (2021-10-29)#

Other changes#

  • Require structlog 21.2.0 and adjust logger configuration of exception handling for the expectations of that version.

2.1.0 (2021-08-09)#

New features#

  • Add safir.models.ErrorModel, which is a model of the error message format preferred by FastAPI. Using the model is not necessary but it’s helpful to reference it in API documentation to generate more complete information about the error messages.

Bug fixes#

  • Mark all FastAPI dependencies as async so that FastAPI doesn’t run them in an external thread pool.

2.0.1 (2021-06-24)#

New features#

  • Defer creation of httpx.AsyncClient until the first time it is requested. Allow re-creation after aclose(), which makes it easier to write test suites.

2.0.0 (2021-06-21)#

Backward-incompatible changes#

As of this release, Safir is a helper library for FastAPI applications instead of aiohttp applications. Much of the library has changed. Authors of software that uses Safir should read the documentation again as part of the upgrade to FastAPI.

Included in this release is:

  • A FastAPI dependency to provide a structlog logger as configured by the safir.logging package, replacing the aiohttp middleware.

  • A FastAPI dependency to provide a global httpx.AsyncClient, replacing the middleware that provided an aiohttp client.

  • Starlette (FastAPI) middleware to parse X-Forwarded-* headers and update request information accordingly.

  • safir.metadata.get_metadata now returns a Pydantic model.

As of this release, Safir only supports Python 3.8 or later.

1.0.0 (2021-06-18)#

Safir v1 will be the major release supporting aiohttp. Starting with Safir v2, Safir will become a support library for FastAPI applications.

This release has no significant difference from 0.2.0. The version bump is to indicate that the aiohttp support is stable.

0.2.0 (2021-06-10)#

New features#

  • configure_logging now supports an optional add_timestamp parameter (false by default) that adds a timestamp to each log message.

0.1.1 (2021-01-14)#

Bug fixes#

  • Fix duplicated log output when logging is configured multiple times.

0.1.0 (2020-02-26)#

New features#

  • The first release of Safir featuring:

    • safir.http for adding an aiohttp.ClientSession to your application.

    • safir.logging for configuring structlog loggers.

    • safir.metadata helps your gather and structure metadata about your application for publishing on metadata endpoints.

    • safir.middleware includes a logging middleware that adds a logger with bound context about the request to your Request object.

    • Documentation about these features and a tutorial for starting a new application with the roundtable_aiohttp_bot template.