safir 2.0.0

The LSST SQuaRE framework for Roundtable bots.

Safir is the SQuaRE Framework for Roundtable

Roundtable is the SQuaRE application and bot deployment platform, hosted on Kubernetes with Argo CD. Safir is a Python package that lets you develop Roundtable bots, based on the FastAPI asyncio web framework.

Install from PyPI:

pip install safir

The best way to create a new Safir-based Roundtable bot is with the fastapi_safir_app template.

Read more about Safir at https://safir.lsst.io

Features

• Set up an httpx.AsyncClient as part of the application start-up and shutdown lifecycle.

• Set up structlog-based logging.

• Middleware for attaching request context to the logger to include a request UUID, method, and route in all log messages.

• Process X-Forwarded-* headers to determine the source IP and related information of the request.

• Gather and structure standard metadata about your application.

Developing Safir

The best way to start contributing to Safir is by cloning this repository creating a virtual environment, and running the init command:

git clone https://github.com/lsst-sqre/safir.git
cd safir
make init

For details, see https://safir.lsst.io/dev/development.html.

Change log

2.0.0 (2021-06-21)

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)

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

• Update dependencies.

0.1.1 (2021-01-14)

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

• Update dependencies.

0.1.0 (2020-02-26)

• 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.

MIT License

Copyright (c) 2020 Association of Universities for Research in Astronomy, Inc. (AURA)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.