core-apis 2.0.0

This project/library contains useful elements related to APIs...

core-apis

This project/library contains useful elements related to APIs and provides basic structures to speed up the implementation of an API service using the FastApi framework as base…

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Installation

Install from PyPI using pip:

pip install core-apis
uv pip install core-apis  # Or using UV...

Features

FastAPI Server Management

• Quick server setup with uvicorn ASGI server

• Environment-based configuration (HOST, PORT, DEBUG, LOG_LEVEL)

• Secure defaults (localhost-only binding)

Application Factory

• AppConfig dataclass consolidating all application parameters (name, version, description, base_path, cors_config, debug)

• CorsConfig dataclass for CORS middleware (origins, methods, headers)

• create_application(app_config: AppConfig) factory with safe defaults

Router Management

• Plugin architecture: register routers at import time via add_router()

• Runtime addition: attach routers to an existing app via app.include_router()

• reset_routers() for clearing the registry between tests

• Built-in health check endpoint (/api/ping)

Response Standardization

• @wrap_response decorator for consistent API responses

• ApiResponse TypedDict contract: code, status, result, error

• HTTP status code mapping (2XX success, 4XX error, 5XX failure)

• Automatic exception handling for ServiceException and InternalServerError

Testing Utilities

• BaseApiTestCases class for FastAPI testing with pre-configured TestClient

• setUp() calls reset_routers() automatically to prevent cross-test pollution

• init_client(with_cors=True) for flexible test application initialization

How to use it

The simple way to spin up the FastAPI server locally using uvicorn:

# -*- coding: utf-8 -*-
from core_apis.api import server
server.run()

Creating an application with custom configuration (AppConfig / CorsConfig):

# -*- coding: utf-8 -*-
from core_apis.api import create_application, AppConfig, CorsConfig

app = create_application(
    app_config=AppConfig(
        name="My Service",
        version="1.0.0",
        cors_config=CorsConfig(
            enabled=True,
            origins=["https://example.com"],
        ),
    ),
)

Adding custom routers — plugin architecture (recommended):

Use add_router() to register routers at import time. They are collected by create_application() when the app is built. This is the recommended pattern for plugins and reusable components that don’t need a reference to the app instance.

# -*- coding: utf-8 -*-

from fastapi import APIRouter

from core_apis.api import server
from core_apis.api.routers import add_router

router = APIRouter()
add_router(router)

@router.get(path="/server_status")
def get_server_status():
    return {"status": "OK"}

server.run()

Adding routers at runtime (post-creation):

Use app.include_router() directly on the FastAPI instance after the application has already been created. Useful for dynamic or conditional route registration.

# -*- coding: utf-8 -*-

from fastapi import APIRouter

from core_apis.api import create_application

app = create_application()

late_router = APIRouter()

@late_router.get(path="/status")
def get_status():
    return {"status": "OK"}

app.include_router(late_router, prefix="/api")

Using @wrap_response — standardized response contract (ApiResponse):

# -*- coding: utf-8 -*-

from core_https import HTTPStatus
from core_apis.decorators import wrap_response

@wrap_response
def get_item(item_id: int):
    return HTTPStatus.OK, {"id": item_id, "name": "Widget"}

# Returns an ApiResponse dict:
# {"code": 200, "status": "success", "result": {"id": 1, "name": "Widget"}, "error": None}

For an example of the structure of a production-ready project check: https://gitlab.com/bytecode-solutions/examples/fastapi-project

Quick Start

Installation

Install the package:

pip install core-apis
uv pip install core-apis  # Or using UV...
pip install -e ".[dev]"    # For development...

Setting Up Environment

1. Install required libraries:

pip install --upgrade pip
pip install virtualenv

2. Create Python virtual environment:

virtualenv --python=python3.12 .venv

3. Activate the virtual environment:

source .venv/bin/activate

Install packages

pip install .
pip install -e ".[dev]"

Check tests and coverage

python manager.py run-tests
python manager.py run-coverage

Contributing

Contributions are welcome! Please:

1. Fork the repository

2. Create a feature branch

3. Write tests for new functionality

4. Ensure all tests pass: pytest -n auto

5. Run linting: pylint core_apis

6. Run security checks: bandit -r core_apis

7. Submit a pull request

License

This project is licensed under the MIT License. See the LICENSE file for details.

Links

• Documentation: https://core-apis.readthedocs.io/en/latest/

• Repository: https://gitlab.com/bytecode-solutions/core/core-apis

• Issues: https://gitlab.com/bytecode-solutions/core/core-apis/-/issues

• Changelog: https://gitlab.com/bytecode-solutions/core/core-apis/-/blob/master/CHANGELOG.md

• PyPI: https://pypi.org/project/core-apis/

Support

For questions or support, please open an issue on GitLab or contact the maintainers.

Authors

• Alejandro Cora González - Initial work - [e-mail]