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Kludex/uvicorn

Uvicorn is a high-performance ASGI web server for Python, enabling asynchronous web applications with support for HTTP/1.1 and WebSockets.

Core Features

ASGI specification compliant

Supports HTTP/1.1 and WebSockets

Optimized with Cython-based dependencies (uvloop, httptools)

Lightweight and fast for async Python frameworks

Quick Start

pip install uvicorn

Detailed Introduction

Uvicorn is a crucial ASGI (Asynchronous Server Gateway Interface) web server implementation for Python, filling a long-standing gap for low-level server/application interfaces in async frameworks. It provides a robust foundation for building modern, high-performance asynchronous web applications, supporting both traditional HTTP/1.1 and real-time WebSocket connections. By adhering to the ASGI specification, Uvicorn fosters a common tooling ecosystem across various async Python frameworks, enabling efficient handling of long-lived connections and I/O-bound operations.