datapress-core

Backend-agnostic core for datapress — a Rust workspace that exposes Parquet / Delta datasets over a JSON HTTP API.

This crate holds the pieces shared by every backend:

Configuration model (datasets.toml parsing, server/auth/docs/swagger/metrics blocks).
The Backend trait and request/response models (QueryRequest, predicates, aggregation plans).
Centralized AppError with HTTP status mapping.
actix-web routing and v1 handlers, plus optional Swagger UI, Prometheus metrics, and OIDC auth (all feature-gated).

It is consumed by the backend crates datapress-duckdb and datapress-datafusion; you typically depend on one of those rather than on this crate directly.

Features

Feature	Effect
`duckdb`	Enables the DuckDB `From` error conversions.
`datafusion`	Enables the Arrow/Parquet/DataFusion `From` error conversions.
`docs`	Embed and serve the MkDocs site.
`swagger`	Embed Swagger UI + OpenAPI spec.
`metrics`	Expose a Prometheus `/metrics` endpoint.
`auth`	OIDC bearer-token authentication + scope enforcement.

MIT — see LICENSE.