stac-fastapi.extensions

An implementation of STAC API based on the FastAPI framework.


Keywords
STAC, FastAPI, COG
License
MIT
Install
pip install stac-fastapi.extensions==3.0.0a2

Documentation

FastAPI implemention of the STAC API spec.

Test Package version License


Documentation: https://stac-utils.github.io/stac-fastapi/

Source Code: https://github.com/stac-utils/stac-fastapi


Python library for building a STAC compliant FastAPI application. The project is split up into several namespace packages:

  • stac_fastapi.api: An API layer which enforces the stac-api-spec.
  • stac_fastapi.extensions: Abstract base classes for STAC API extensions and third-party extensions.
  • stac_fastapi.types: Shared types and abstract base classes used by the library.

Backends

Backends are hosted in their own repositories:

stac-fastapi was initially developed by arturo-ai.

Response Model Validation

A common question when using this package is how request and response types are validated?

This package uses stac-pydantic to validate and document STAC objects. However, by default, validation of response types is turned off and the API will simply forward responses without validating them against the Pydantic model first. This decision was made with the assumption that responses usually come from a (typed) database and can be considered safe. Extra validation would only increase latency, in particular for large payloads.

To turn on response validation, set ENABLE_RESPONSE_MODELS to True. Either as an environment variable or directly in the ApiSettings.

With the introduction of Pydantic 2, the extra time it takes to validate models became negatable. While ENABLE_RESPONSE_MODELS still defaults to False there should be no penalty for users to turn on this feature but users discretion is advised.

Installation

# Install from PyPI
python -m pip install stac-fastapi.types stac-fastapi.api stac-fastapi.extensions

# Install a backend of your choice
python -m pip install stac-fastapi.sqlalchemy
# or
python -m pip install stac-fastapi.pgstac

Other backends may be available from other sources, search PyPI for more.

Development

Install the packages in editable mode:

python -m pip install -e \
  'stac_fastapi/types[dev]' \
  'stac_fastapi/api[dev]' \
  'stac_fastapi/extensions[dev]'

To run the tests:

python -m pytest