httpware 0.5.0

Resilience-first async HTTP client framework for Python

httpware

Async HTTP client framework for Python.

httpware is a thin opinionated wrapper around httpx2. It re-exports httpx2.Request/httpx2.Response, adds a middleware chain composed at client construction, supports opt-in typed response decoding (pydantic and msgspec are both extras), and raises a status-keyed exception tree automatically on 4xx/5xx. It also ships a small resilience suite — Retry middleware with a Finagle-style RetryBudget, plus a Bulkhead concurrency limiter — under httpware.middleware.resilience.

Status: Pre-1.0. Public API is subject to change between minor releases until v1.0. Streaming and observability are not yet shipped.

Install

pip install httpware                # core only — no decoder
pip install httpware[pydantic]      # + PydanticDecoder (the default-decoder path)
pip install httpware[msgspec]       # + MsgspecDecoder
pip install httpware[all]           # everything declared above (pydantic, msgspec)

AsyncClient() with no decoder= argument defaults to constructing a PydanticDecoder; that path requires the pydantic extra and raises ImportError at AsyncClient.__init__ if it is missing.

Quickstart

Requires: pip install httpware[pydantic]

from httpware import AsyncClient
from pydantic import BaseModel


class User(BaseModel):
    id: int
    name: str


async def main() -> None:
    async with AsyncClient(base_url="https://api.example.com") as client:
        user = await client.get("/users/1", response_model=User)
        print(user.name)

With resilience middleware

Compose resilience middleware at construction; Bulkhead goes outside Retry so one slot covers all retry attempts.

from httpware import AsyncClient, Bulkhead, Retry


async def main() -> None:
    async with AsyncClient(
        base_url="https://api.example.com",
        middleware=[
            Bulkhead(max_concurrent=10),  # cap total in-flight
            Retry(),                       # default: 3 attempts, full-jitter backoff
        ],
    ) as client:
        user = await client.get("/users/1", response_model=User)

Streaming responses

For large responses or server-sent events, stream the body chunk-by-chunk. stream() is an async context manager:

from httpware import AsyncClient


async def main() -> None:
    async with AsyncClient(base_url="https://api.example.com") as client:
        async with client.stream("GET", "/big-file") as response:
            async for chunk in response.aiter_bytes():
                process(chunk)

stream() auto-raises StatusError subclasses on 4xx/5xx with the response body pre-read, so exc.response.content is accessible from the caught exception.

It does NOT pass through the middleware chain: Retry, Bulkhead, and any custom middleware are bypassed. (Retry separately refuses to retry any request — stream or non-stream — whose body was an async-iterable, since streams can't replay across attempts.)

Errors

All 4xx/5xx responses raise typed exceptions automatically: NotFoundError, ServiceUnavailableError, RateLimitedError, etc. — all subclasses of httpware.StatusError. Transport-layer transient failures raise NetworkError; the resilience middleware raise RetryBudgetExhaustedError and BulkheadFullError. Everything inherits httpware.ClientError.

🗒️ Release notes

📦 PyPI

📝 License

Part of modern-python

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