fairagro-middleware-api-client 8.6.3

The FAIRagro advanced middleware API client

Middleware API Client

Python client for the FAIRagro Middleware API with certificate-based authentication (mTLS).

Features

• ✅ Certificate-based authentication (mutual TLS)
• ✅ Configuration via YAML files, environment variables, or Docker secrets
• ✅ Async context manager support
• ✅ Comprehensive error handling
• ✅ Type-safe with Pydantic models

Installation

This package is part of the FAIRagro Advanced Middleware project and uses local dependencies.

Quick Start

1. Create Configuration File

# config.yaml
log_level: INFO
api_url: https://your-api-server:8000
client_cert_path: /path/to/client-cert.pem
client_key_path: /path/to/client-key.pem
ca_cert_path: /path/to/ca-cert.pem  # optional
timeout: 30.0
verify_ssl: true

2. Use the Client

import asyncio
from pathlib import Path
from arctrl import ARC, ArcInvestigation
from middleware.api_client import Config, ApiClient


async def main():
    # Load configuration
    config = Config.from_yaml_file(Path("config.yaml"))

    # Create ARC object
    inv = ArcInvestigation.create(identifier="my-arc", title="My ARC")
    arc = ARC.from_arc_investigation(inv)

    # Use client with context manager
    async with ApiClient(config) as client:
        # Send a single ARC
        response = await client.create_or_update_arc(
            rdi="my-rdi",
            arc=arc,
        )
        print(f"ARC status: {response.status}")

        # Or run a harvest workflow
        async def arc_stream():
            yield arc

        harvest = await client.harvest_arcs(
            rdi="my-rdi",
            arcs=arc_stream(),
            expected_datasets=1,
        )
        print(f"Harvest status: {harvest.status}")


asyncio.run(main())

Configuration Options

Option	Type	Required	Default	Description
log_level	string	No	INFO	Logging level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
api_url	string	Yes	-	Base URL of the Middleware API
client_cert_path	string	No	null	Path to client certificate (PEM format)
client_key_path	string	No	null	Path to client private key (PEM format)
ca_cert_path	string	No	null	Path to CA certificate for server verification
timeout	float	No	30.0	Request timeout in seconds
verify_ssl	bool	No	true	Enable SSL certificate verification
max_concurrency	int	No	10	Maximum concurrent API requests (also default for harvest_arcs)

API Methods

create_or_update_arc(rdi: str, arc: ARC | dict) -> ArcResult

Create or update one ARC in the Middleware API.

Parameters:

• rdi (str): The RDI identifier (e.g., "edaphobase").
• arc (ARC | dict): ARC object from arctrl or pre-serialised RO-Crate dict.

Returns:

• ArcResult: Contains the result of the operation.

Raises:

• ApiClientError: If the request fails due to HTTP errors or network issues.

Example:

from arctrl import ARC, ArcInvestigation

inv = ArcInvestigation.create(identifier="my-arc-001", title="My ARC")
arc = ARC.from_arc_investigation(inv)

response = await client.create_or_update_arc(
    rdi="edaphobase",
    arc=arc,
)

harvest_arcs(rdi: str, arcs: AsyncIterator[ARC | dict], expected_datasets: int | None = None) -> HarvestResult

Convenience workflow to create a harvest, upload all ARCs from an async iterator, and complete the harvest.

• Uses config.max_concurrency by default.
• Continues on item-level submission errors and skips failed items.
• Cancels the harvest only for catastrophic errors.

All errors are raised as ApiClientError exceptions:

from middleware.api_client import ApiClientError

try:
    response = await client.create_or_update_arc(
        rdi="my-rdi",
        arc=arc,
    )
except ApiClientError as e:
    print(f"API Error: {e}")

Configuration via Environment Variables

You can override configuration values using environment variables:

export API_URL="https://production-api:8000"
export CLIENT_CERT_PATH="/secure/certs/prod-cert.pem"
export CLIENT_KEY_PATH="/secure/certs/prod-key.pem"

Or use Docker secrets in /run/secrets/.

License

This is part of the FAIRagro Advanced Middleware project.