Skip to main content

Lightweight Python asyncio HTTP/1.1 client.

Project description

lowhaio CircleCI Maintainability Test Coverage

A lightweight Python asyncio HTTP/1.1 client. No additional tasks are created; all code is in a single module; and other than the standard library only a single dependency is required, aiodnsresolver.


The API is streaming-first: for both request and response bodies, asynchronous generators are used.

import os
from lowhaio import Pool

request, _ = Pool()

path = 'my.file'
content_length = str(os.stat(path).st_size).encode()
async def file_data():
    with open(path, 'rb') as file:
        for chunk in iter(lambda:, b''):
            yield chunk

code, headers, body = await request(
    b'POST', '',
    params=(), headers=((b'content-length': content_length),), body=file_data(),
async for chunk in body:

However, there are helper functions streamed and buffered when this isn't required or possible.

from lowhaio import Pool, streamed, buffered

request, _ = Pool()

content = b'some-data'
content_length = b'9'
code, headers, body = await request(
    b'POST', '',
    params=(), headers=((b'content-length': content_length),), body=streamed(content),

response = await buffered(body)


The scope of the core functions is restricted to:

  • (TLS) connection opening, closing and pooling (pooling is planned);
  • passing and receiving HTTP headers and streaming bodies;
  • decoding chunked responses.

This is to make the core behaviour useful to a reasonable range of uses, but to not include what can be added by layer(s) on top. Specifically not included:

  • following redirects (planned for a helper function);
  • cookies;
  • compressing/decompressing requests/responses;
  • authentication.

Project details

Release history Release notifications

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for lowhaio, version 0.0.26
Filename, size File type Python version Upload date Hashes
Filename, size lowhaio-0.0.26-py3-none-any.whl (5.5 kB) File type Wheel Python version py3 Upload date Hashes View hashes
Filename, size lowhaio-0.0.26.tar.gz (4.5 kB) File type Source Python version None Upload date Hashes View hashes

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page