stario 1.4.0

Stario brings back the joy of building web apps

✨ Binging back joy and exploration to building web apps ✨

---

Documentation: stario.dev

Source Code: https://github.com/bobowski/stario

---

Stario

Stario is a lightweight ASGI framework built on top of Starlette that brings back the joy of building web apps. Focus on building apps rather than passing data between components.

Why Stario?

• HTML-first - dropping intermediary data layers (e.g. JSON) and using HTML as the primary data format. "Just throw html at user and make them happy."
• Rapid prototyping - a simple framework to build and test fullstack ideas with minimal setup. Build, see if it works, optimize later (if ever).
• No-nonsense - no ceremony, no complexity, just build.
• Learning experience - Learn about web, rather than X or Y language framework. I've learned a lot building this framework. I hope you will too.

It focuses on:

• HTML-first DX: return strings or HTML providers, no ceremony.
• Realtime by default: seamless Server-Sent Events (SSE) with DataStar patches/signals.
• Great defaults: Brotli compression out of the box, fast dependency resolution, and caching.
• Starlette compatibility: interop with routes, middleware, and tools you already know.

What you get:

• A tiny, low-complexity HTTP framework powered by Starlette and DataStar.
• SSE streaming by simply yielding patches, HTML, or signals (dicts).
• Brotli compression middleware enabled by default (GZip fallback).
• Simple DI via Annotated with request params (QueryParam, PathParam, Header, Cookie) and Inject.
• Per-request/app/ttl caching and configurable run modes (auto, sync, thread).
• Header-constrained routes and a lightweight StarRouter.
• Few dependencies and a clear, typed codebase.

---

Installation

From PyPI (when available):

pip install stario

Or from source in this repository:

cd stario
pip install -e .

You'll also want an ASGI server such as uvicorn:

pip install uvicorn

Quick start

# main.py
import asyncio
from stario import Stario, Query
from stario.toys import toy_page
from stario.html import div, h2


async def home():
    return toy_page(
        h2("Realtime responses!"),
        div(
            {"data-on-load": "@get('/online-counter')"},
            "This shows how long the connection has been open.",
        ),
        div({"id": "online-counter"}),
    )


async def online_counter():
    duration = 0
    interval = 0.01
    while True:
        # Yielding HTML elements streams as SSE with DataStar-compatible events
        yield div({"id": "online-counter"}, f"Online since: {duration:.1f}s")
        duration += interval
        await asyncio.sleep(interval)


# Building the app
app = Stario(
    Query("/", home),
    Query("/online-counter", online_counter),
)

Run with Uvicorn:

uvicorn main:app --reload

Open http://127.0.0.1:8000/ in your browser.

---

Stario code is designed & crafted for joy.
— ⭐️ —