chumicro-requests-experimental 0.19.0

Non-blocking HTTP/1.1 client for CircuitPython, MicroPython, and CPython.

chumicro-requests

A non-blocking HTTP/1.1 client — your LED keeps blinking through a TLS handshake.

A requests-flavored surface that advances one chunk per runner tick — connect, send, recv, parse — so your control loop never stalls waiting for a peer. Plain HTTP, HTTPS (live-verified on real boards), POST / PUT / PATCH / DELETE, JSON helper, redirect handling, Transfer-Encoding: chunked decode, and stream=True for bodies bigger than RAM — read a firmware image into a 512-byte buffer, chunk by chunk.

Part of the ChuMicro family — small, focused Python libraries for microcontrollers and laptops. Browse all libraries.

Install

# CircuitPython (after `circup bundle-add ChuMicro/ChuMicro-Bundle-Experimental`)
circup install chumicro_requests

# MicroPython
mpremote mip install github:ChuMicro/ChuMicro-Bundle-Experimental/chumicro_requests

# CPython
pip install chumicro-requests-experimental

For bundle setup, pre-compiled .mpy bundles, the experimental channel, and details on PyPI naming, see the chumicro INSTALL guide.

Quick example

from chumicro_requests import HttpClient
from chumicro_sockets.sockets_factory import connector_factory
from chumicro_timing import ticks_ms

client = HttpClient(transport_factory=connector_factory())
handle = client.get("http://api.example.com/now", timeout_ms=5000)

while not handle.done:
    if client.check(ticks_ms()):
        client.handle(ticks_ms())

response = handle.result          # raises HttpError on failure
print(response.status_code)       # 200
print(response.headers["content-type"])
print(response.body)              # raw response bytes
print(response.text)              # decoded str (charset sniffed from Content-Type)
print(response.json())            # parsed JSON when Content-Type is application/json

What's included

Symbol	Purpose
HttpClient	Runner-shaped HTTP/1.1 client; check(now_ms) / handle(now_ms); per-verb methods plus generic request(...); stream=True for incremental bodies; cancel() aborts in flight.
RequestHandle	Per-request handle: .done, .result, .error; .read_body_into(buffer) drains a streamed body.
Response	Status code, reason, headers, raw body, URL; .text, .json(), .encoding; .streamed on streamed exchanges.
chumicro_requests.generators	Opt-in submodule: yield from-shaped fetch / get / post / ... one-shots and stream + BodyReader for chunked body reads under Runner.add_generator.
CaseInsensitiveDict	Header dict with case-insensitive lookups.
WhenOversized	Policy enum for responses past max_body_bytes.
chumicro_sockets.sockets_factory.connector_factory(...)	Shared module: convenience connection-factory wired to chumicro-sockets.
parse_url(url)	URL → (scheme, host, port, path).
parse_charset(content_type)	Extract charset from a Content-Type header value.
encode_request(...)	Build raw HTTP request bytes.
ResponseParser	Streaming response state machine.
HttpError + subclasses	HttpBusyError, HttpTimeoutError, HttpProtocolError, HttpURLError, HttpOversizedError.
chumicro_requests.testing.FakeHttpClient	Host-only fake for downstream test suites.

Where this fits

Depends on chumicro-sockets for TCP / TLS and chumicro-timing for ticks. Used directly in app code.

Platform support

Works on CPython, MicroPython, and CircuitPython. Pure Python — no native extensions.

Examples

Example	What it shows
periodic_get.py	Periodic GET on a real CP/MP board. Brings wifi up, hits a configured URL every N seconds, prints status + body length, drives an LED-blink counter to verify the request never blocks the loop. Reads wifi + target URL from runtime_config.msgpack (chumicro-workspace) with a constants fallback. Cross-runtime (CP + MP).

Wiring wifi credentials for examples and functional tests

The hardware-prefixed examples + real-network suites in functional_tests/test_real_*.py need wifi credentials. See docs/wiring-wifi-credentials.md for the workspace-based and raw single-file paths. The library itself never reads TOML — it takes a transport_factory and goes; config wiring is application-layer.

Contributing

Working on chumicro-requests itself? Clone the mono-repo if you haven't already — the rest of the workflow assumes you're inside that workspace.

pip install -e .[test]
pytest tests/                  # host-side tests
pytest functional_tests/       # on-device tests (needs a board registered in devices.yml)

Register a board before running functional tests: chumicro-workspace add-device <id> --address <port>.

Docs

📖 Stable docs · Experimental docs

Find this library

• PyPI: chumicro-requests
• Bundle: ChuMicro-Bundle (CircuitPython & MicroPython)
• Experimental bundle: ChuMicro-Bundle-Experimental
• Source: libraries/requests

License

MIT