---
id: aiohttp-middlewares
version: "2.4.0"
license: BSD-3-Clause
license_treatment: permissive
maintenance: active
---

# aiohttp-middlewares — Collection of useful middlewares for aiohttp applications.

License: permissive · Maintenance: active · Downloads: 198.5K/mo

## What it is and what it does

aiohttp-middlewares is a curated collection of middleware functions designed to fill gaps in aiohttp.web's built-in middleware offerings. It addresses common web-development patterns—CORS header injection, centralized error handling, request shielding—that developers would otherwise implement themselves. The package works as a drop-in set of middleware factories that you pass to aiohttp's Application constructor.

The package depends on aiohttp, async-timeout, and yarl, all standard async-web components. It is actively maintained, supports Python 3.8 through 3.12, and carries no known security vulnerabilities. The BSD-3-Clause license permits use in any project type.

Use it for:

- Enable CORS headers for cross-origin requests in a single middleware registration.
- Centralize error handling and HTTP exception responses across all routes.
- Shield view handlers from cancellation during request processing.
- Add request/response logging or timing middleware to an aiohttp application.
- Implement common security headers or request validation patterns without custom code.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides a collection of ready-to-use middlewares for aiohttp.web applications, covering common needs like CORS headers, error handling, and request shielding.

Yes. Active maintenance, no vulnerabilities, low install friction, and a permissive license make this a safe choice. Install it if you are building an aiohttp.web application and want to avoid writing standard middleware boilerplate for CORS, error handling, or similar cross-cutting concerns.

## Install

pip install aiohttp-middlewares
uv add aiohttp-middlewares
poetry add aiohttp-middlewares

## Installing aiohttp-middlewares

Before you install: Low install friction with a pure-Python wheel. Active maintenance with a recent commit on 2026-03-30 and stable production status.

License in practice: BSD-3-Clause is permissive; you can use this in commercial and proprietary projects with minimal restrictions, provided you include the license text.

Quickstart:

pip install aiohttp-middlewares

from aiohttp import web
from aiohttp_middlewares import cors_middleware, error_middleware

app = web.Application(
    middlewares=(
        cors_middleware(origins=("http://localhost:8081",)),
        error_middleware(),
    )
)

Requires aiohttp 3.8.1 or later and Python 3.8+.

Verify before relying:

- Whether all advertised middlewares are documented and which ones are most commonly used in production.
- Performance characteristics when stacking multiple middlewares on high-traffic applications.

## Package facts

- License: BSD-3-Clause (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 198.5K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

aiohttp middleware collection, aiohttp cors middleware, aiohttp error handling, aiohttp web utilities, async web middleware, aiohttp request middleware, aiohttp application middleware, aiohttp, async-web, middleware

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