httpx-retries 0.2.1

A retry layer for HTTPX.

A retry layer for HTTPX.

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HTTPX Retries implements request retry for HTTPX.

It's very common to deal with flaky and unreliable APIs. When requests fail, your program needs to be able to retry them.

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Install HTTPX Retries using pip:

pip install httpx-retries

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To get started, add the transport to your client:

import httpx
from httpx_retries import RetryTransport

with httpx.Client(transport=RetryTransport()) as client:
    response = client.get("https://example.com")

For async usage:

async with httpx.AsyncClient(transport=RetryTransport()) as client:
    response = await client.get("https://example.com")

If you want to use a specific retry strategy, provide a Retry configuration:

from httpx_retries import Retry

retry = Retry(total=5, backoff_factor=0.5)
transport = RetryTransport(retry=retry)

with httpx.Client(transport=transport) as client:
    response = client.get("https://example.com")

Features

HTTPX Retries builds on the patterns users will expect from urllib and requests. The typical approach has been to use urllib3's Retry utility to configure a retry policy. The equivalent code to match the above example using requests is:

from requests.adapters import HTTPAdapter
from urllib3.util.retry import Retry

retry = Retry(total=5, backoff_factor=0.5)
adapter = HTTPAdapter(max_retries=retry)

with requests.Session() as session:
    session.mount("http://", adapter)
    session.mount("https://", adapter)
    response = session.get("https://example.com")

To reduce boilerplate, this package includes a transport that works with both sync and async HTTPX clients, so you don't have to explicitly define policies for simple use cases.

HTTPX adds support for asynchronous requests, so the package exposes a new retry utility. To make it easy to migrate, the API surface is almost identical, with a few main differences:

• total is the only parameter used to configure the number of retries.
• asleep is an async implementation of sleep.
• backoff_strategy can be overridden to customize backoff behavior.
• Some options that are not strictly retry-related are not included (raise_on_status, raise_on_redirect)

Acknowledgements

This package builds on the great work done on HTTPX, urllib3 and requests.