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app

STAC Auth Proxy API.

This module defines the FastAPI application for the STAC Auth Proxy, which handles authentication, authorization, and proxying of requests to some internal STAC API.

configure_app(app: FastAPI, settings: Optional[Settings] = None, **settings_kwargs: Any) -> FastAPI

Apply routes and middleware to a FastAPI app.

Parameters

app : FastAPI The FastAPI app to configure. settings : Settings | None, optional Pre-built settings instance. If omitted, a new one is constructed from settings_kwargs. **settings_kwargs : Any Keyword arguments used to configure the health and conformance checks if settings is not provided.

Source code in src/stac_auth_proxy/app.py
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def configure_app(
    app: FastAPI,
    settings: Optional[Settings] = None,
    **settings_kwargs: Any,
) -> FastAPI:
    """
    Apply routes and middleware to a FastAPI app.

    Parameters
    ----------
    app : FastAPI
        The FastAPI app to configure.
    settings : Settings | None, optional
        Pre-built settings instance. If omitted, a new one is constructed from
        ``settings_kwargs``.
    **settings_kwargs : Any
        Keyword arguments used to configure the health and conformance checks if
        ``settings`` is not provided.
    """
    settings = settings or Settings(**settings_kwargs)

    #
    # Route Handlers
    #

    # If we have customized Swagger UI Init settings (e.g. a provided client_id)
    # then we need to serve our own Swagger UI in place of the upstream's. This requires
    # that we know the Swagger UI endpoint and the OpenAPI spec endpoint.
    if all(
        [
            settings.swagger_ui_endpoint,
            settings.openapi_spec_endpoint,
            settings.swagger_ui_init_oauth,
        ]
    ):
        app.add_route(
            settings.swagger_ui_endpoint,
            SwaggerUI(
                openapi_url=settings.openapi_spec_endpoint,  # type: ignore
                init_oauth=settings.swagger_ui_init_oauth,
            ).route,
            include_in_schema=False,
        )

    if settings.healthz_prefix:
        app.include_router(
            HealthzHandler(upstream_url=str(settings.upstream_url)).router,
            prefix=settings.healthz_prefix,
        )

    #
    # Middleware (order is important, last added = first to run)
    #

    if settings.enable_authentication_extension:
        app.add_middleware(
            AuthenticationExtensionMiddleware,
            default_public=settings.default_public,
            public_endpoints=settings.public_endpoints,
            private_endpoints=settings.private_endpoints,
            oidc_discovery_url=str(settings.oidc_discovery_url),
        )

    if settings.openapi_spec_endpoint:
        app.add_middleware(
            OpenApiMiddleware,
            openapi_spec_path=settings.openapi_spec_endpoint,
            oidc_discovery_url=str(settings.oidc_discovery_url),
            public_endpoints=settings.public_endpoints,
            private_endpoints=settings.private_endpoints,
            default_public=settings.default_public,
            root_path=settings.root_path,
            auth_scheme_name=settings.openapi_auth_scheme_name,
            auth_scheme_override=settings.openapi_auth_scheme_override,
        )

    if settings.items_filter or settings.collections_filter:
        app.add_middleware(Cql2ValidateResponseBodyMiddleware)
        app.add_middleware(Cql2ApplyFilterBodyMiddleware)
        app.add_middleware(Cql2ApplyFilterQueryStringMiddleware)
        app.add_middleware(
            Cql2BuildFilterMiddleware,
            items_filter=settings.items_filter() if settings.items_filter else None,
            collections_filter=(
                settings.collections_filter() if settings.collections_filter else None
            ),
            collections_filter_path=settings.collections_filter_path,
            items_filter_path=settings.items_filter_path,
        )

    app.add_middleware(
        AddProcessTimeHeaderMiddleware,
    )

    app.add_middleware(
        EnforceAuthMiddleware,
        public_endpoints=settings.public_endpoints,
        private_endpoints=settings.private_endpoints,
        default_public=settings.default_public,
        oidc_discovery_url=settings.oidc_discovery_internal_url,
        allowed_jwt_audiences=settings.allowed_jwt_audiences,
    )

    if settings.root_path or settings.upstream_url.path != "/":
        app.add_middleware(
            ProcessLinksMiddleware,
            upstream_url=str(settings.upstream_url),
            root_path=settings.root_path,
        )

    if settings.root_path:
        app.add_middleware(
            RemoveRootPathMiddleware,
            root_path=settings.root_path,
        )

    if settings.enable_compression:
        app.add_middleware(
            CompressionMiddleware,
        )

    return app

create_app(settings: Optional[Settings] = None) -> FastAPI

FastAPI Application Factory.

Source code in src/stac_auth_proxy/app.py
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def create_app(settings: Optional[Settings] = None) -> FastAPI:
    """FastAPI Application Factory."""
    settings = settings or Settings()

    app = FastAPI(
        openapi_url=None,  # Disable OpenAPI schema endpoint, we want to serve upstream's schema
        lifespan=build_lifespan(settings=settings),
        root_path=settings.root_path,
    )
    if app.root_path:
        logger.debug("Mounted app at %s", app.root_path)

    configure_app(app, settings)

    app.add_api_route(
        "/{path:path}",
        ReverseProxyHandler(
            upstream=str(settings.upstream_url),
            override_host=settings.override_host,
        ).proxy_request,
        methods=["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"],
    )

    return app