Performant, light and flexible ASGI API Framework
Project description
Starlite
Starlite is a powerful, flexible and highly performant ASGI API framework written in modern python and offering first class typing support.
Check out the documentation 📚.
Installation
pip install starlite
Quick Start
from starlite import Starlite, get
@get("/")
def hello_world() -> dict[str, str]:
"""Keeping the tradition alive with hello world."""
return {"hello": "world"}
app = Starlite(route_handlers=[hello_world])
Core Features
- Class based controllers
- Dependency Injection
- Extended testing support
- Layered Middleware
- Layered Parameter declaration
- Life Cycle Hooks
- OpenAPI 3.1 schema generation
- Piccolo ORM Support (via plugin)
- Plugin System
- Route Guards based Authorization
- SQLAlchemy Support (via plugin)
- Support for Redoc
- Support for Stoplight Elements
- Support for Swagger-UI
- Support for dataclasses and
TypedDict - Tortoise ORM Support (via plugin)
- Trio support (built-in, via AnyIO)
- Ultra-fast json serialization and deserialization using orjson
- Validation and Parsing using Pydantic
Example Applications
- starlite-pg-redis-docker: In addition to Starlite, this demonstrates a pattern of application modularity, SQLAlchemy 2.0 ORM, Redis cache connectivity, and more. Like all Starlite projects, this application is open to contributions, big and small.
- starlite-hello-world: A bare-minimum application setup. Great for testing and POC work.
The name Starlite and relation to Starlette
Starlite was originally built using the Starlette ASGI toolkit. The name Starlite was
meant to show this relation. But, over time Starlite grew in capabilities and complexity, and eventually we no longer needed
to depend on Starlette. From version 1.39.0 onward starlette was removed as a dependency of Starlite, and the name now carries
this piece of history with it.
Performant
Additionally, Starlite is very fast in comparison to other ASGI frameworks. In fact, the only framework that is faster in our benchmarks is BlackSheep, which is almost completely written in cython and does not work with pydantic out of the box as such:
JSON Benchmarks
PlainText Benchmarks
Legend:
- a-: async, s-: sync
- np: no params, pp: path param, qp: query param, mp: mixed params
You can see and run the benchmarks here.
Class Based Controllers
While supporting function based route handlers, Starlite also supports and promotes python OOP using class based controllers:
from typing import List, Optional
from pydantic import UUID4
from starlite import Controller, Partial, get, post, put, patch, delete
from datetime import datetime
from my_app.models import User
class UserController(Controller):
path = "/users"
@post()
async def create_user(self, data: User) -> User:
...
@get()
async def list_users(self) -> List[User]:
...
@get(path="/{date:int}")
async def list_new_users(self, date: datetime) -> List[User]:
...
@patch(path="/{user_id:uuid}")
async def partial_update_user(self, user_id: UUID4, data: Partial[User]) -> User:
...
@put(path="/{user_id:uuid}")
async def update_user(self, user_id: UUID4, data: User) -> User:
...
@get(path="/{user_name:str}")
async def get_user_by_name(self, user_name: str) -> Optional[User]:
...
@get(path="/{user_id:uuid}")
async def get_user(self, user_id: UUID4) -> User:
...
@delete(path="/{user_id:uuid}")
async def delete_user(self, user_id: UUID4) -> None:
...
ReDoc, Swagger-UI and Stoplight Elements API Documentation
While running Starlite, you can view the generated OpenAPI documentation using a ReDoc site, a Swagger-UI as well as a Stoplight Elements site.
Data Parsing, Type Hints and Pydantic
One key difference between Starlite and Starlette/FastAPI is in parsing of form data and query parameters- Starlite supports mixed form data and has faster and better query parameter parsing.
Starlite is rigorously typed, and it enforces typing. For example, if you forget to type a return value for a route handler, an exception will be raised. The reason for this is that Starlite uses typing data to generate OpenAPI specs, as well as to validate and parse data. Thus typing is absolutely essential to the framework.
Furthermore, Starlite allows extending its support using plugins.
SQLAlchemy Support, Plugin System and DTOs
Starlite has a plugin system that allows the user to extend serialization/deserialization, OpenAPI generation and other features. It ships with a builtin plugin for SQL Alchemy, which allows the user to use SQLAlchemy declarative classes "natively", i.e. as type parameters that will be serialized/deserialized and to return them as values from route handlers.
Starlite also supports the programmatic creation of DTOs with a DTOFactory class, which also supports the use of
plugins.
OpenAPI
Starlite has custom logic to generate OpenAPI 3.1.0 schema, the latest version. The schema generated by Starlite is
significantly more complete and more correct than those generated by FastAPI, and they include optional generation of
examples using the pydantic-factories library.
Dependency Injection
Starlite has a simple but powerful DI system inspired by pytest. You can define named dependencies - sync or async - at different levels of the application, and then selective use or overwrite them.
Middleware
Starlite supports the Starlette Middleware system while simplifying it and offering builtin configuration of CORS and some other middlewares.
Route Guards
Starlite has an authorization mechanism called guards, which allows the user to define guard functions at different
level of the application (app, router, controller etc.) and validate the request before hitting the route handler
function.
Request Life Cycle Hooks
Starlite supports request life cycle hooks, similarly to Flask - i.e. before_request and after_request
Contributing
Starlite is open to contributions big and small. You can always join our discord server or join our Matrix space to discuss contributions and project maintenance. For guidelines on how to contribute, please see the contribution guide.
Contributors ✨
Thanks goes to these wonderful people (emoji key):
This project follows the all-contributors specification. Contributions of any kind welcome!
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