requests-wasi-http

A requests transport adapter for WASI HTTP (wasi:http@0.2), so requests works inside WebAssembly components built with componentize-py.

import requests
import wit_world  # the componentize-py bindings for your WIT world
from wasi_http_adapter import WasiHttpAdapter

session = requests.Session()
adapter = WasiHttpAdapter(wit_world)  # or WasiHttpAdapter("wit_world")
session.mount("https://", adapter)
session.mount("http://", adapter)

response = session.get("https://postman-echo.com/get", timeout=5)
print(response.status_code, response.json())

Or use the convenience factory: session = wasi_http_adapter.wasi_session(wit_world).

The adapter never guesses where the bindings live: pass the componentize-py bindings package for your WIT world (a world that imports wasi:http/outgoing-handler) explicitly, either as the imported package object or as its name.

Cookies, redirects, timeouts, and streaming downloads (stream=True) work through a regular Session. TLS verification, client certificates, and proxies are owned by the WASI host and therefore ignored; Accept-Encoding is forced to identity since there is no transparent decompression.

Development

uv run pytest          # tests
uv run ruff format .   # format
uv run ruff check .    # lint
uv run ty check        # types