Various strategies for sending requests
Project description
aio-request
This library simplifies an interaction between microservices:
- Allows sending requests using various strategies
- Propagates a deadline and a priority of requests
- Exposes client/server metrics
Example:
import aiohttp
import aio_request
async with aiohttp.ClientSession() as client_session:
client = aio_request.setup(
transport=aio_request.AioHttpTransport(client_session),
endpoint="http://endpoint:8080/",
)
response_ctx = client.request(
aio_request.get("thing"),
deadline=aio_request.Deadline.from_timeout(5)
)
async with response_ctx as response:
pass # process response here
Request strategies
The following strategies are supported:
- Single attempt. Only one attempt is sent.
- Sequential. Attempts are sent sequentially with delays between them.
- Parallel. Attempts are sent in parallel one by one with delays between them.
Attempts count and delays are configurable.
Example:
import aiohttp
import aio_request
async with aiohttp.ClientSession() as client_session:
client = aio_request.setup(
transport=aio_request.AioHttpTransport(client_session),
endpoint="http://endpoint:8080/",
)
response_ctx = client.request(
aio_request.get("thing"),
deadline=aio_request.Deadline.from_timeout(5),
strategy=aio_request.parallel_strategy(
attempts_count=3,
delays_provider=aio_request.linear_delays(min_delay_seconds=0.1, delay_multiplier=0.1)
)
)
async with response_ctx as response:
pass # process response here
Deadline & priority propagation
To enable it for the server side a middleware should be configured:
import aiohttp.web
import aio_request
app = aiohttp.web.Application(middlewares=[aio_request.aiohttp_middleware_factory()])
Expose client/server metrics
To enable client metrics a metrics provider should be passed to the transport:
import aiohttp
import aio_request
async with aiohttp.ClientSession() as client_session:
client = aio_request.setup(
transport=aio_request.AioHttpTransport(
client_session,
metrics_provider=aio_request.PROMETHEUS_METRICS_PROVIDER
),
endpoint="http://endpoint:8080/",
)
It is an example of how it should be done for aiohttp and prometheus.
To enable client metrics a metrics provider should be passed to the middleware:
import aiohttp.web
import aio_request
app = aiohttp.web.Application(
middlewares=[
aio_request.aiohttp_middleware_factory(
metrics_provider=aio_request.PROMETHEUS_METRICS_PROVIDER
)
]
)
Circuit breaker
import aiohttp
import aio_request
async with aiohttp.ClientSession() as client_session:
client = aio_request.setup_v2(
transport=aio_request.AioHttpTransport(client_session),
endpoint="http://endpoint:8080/",
circuit_breaker=aio_request.DefaultCircuitBreaker[str, int](
break_duration=1.0,
sampling_duration=1.0,
minimum_throughput=2,
failure_threshold=0.5,
),
)
In the case of requests count >= minimum throughput(>=2) in sampling period(1 second) the circuit breaker will open if failed requests count/total requests count >= failure threshold(50%).
v0.1.34 (2024-11-05)
v0.1.33 (2024-10-29)
v0.1.32 (2024-10-18)
v0.1.31 (2024-09-05)
v0.1.30 (2023-07-23)
v0.1.29 (2023-04-27)
v0.1.28 (2023-04-27)
v0.1.27 (2023-02-16)
v0.1.26 (2022-11-02)
v0.1.25 (2022-08-25)
- Reverted: URL-encode path_parameters - let user decide what to do
v0.1.24 (2022-07-04)
v0.1.23 (2022-02-08)
v0.1.22 (2022-01-08)
- Return default json expected content_type to "application/json"
- Release aiohttp response instead of close
- Validate json content-type
v0.1.21 (2022-01-05)
- Content type should be None in Response.json()
v0.1.20 (2022-01-05)
v0.1.19 (2021-11-01)
v0.1.18 (2021-09-08)
v0.1.17 (2021-09-01)
v0.1.16 (2021-09-01)
v0.1.15 (2021-09-01)
v0.1.14 (2021-08-18)
v0.1.13 (2021-08-15)
v0.1.12 (2021-07-21)
v0.1.11 (2021-07-21)
- Fix Request.update_headers, add Request.extend_headers #59
v0.1.10 (2021-07-20)
- Add Response.is_json property to check whether content-type is json compatible #58
- Tracing support #54,
- Configuration of a new pipeline
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
aio-request-0.1.34.tar.gz
(21.9 kB
view details)
Built Distribution
File details
Details for the file aio-request-0.1.34.tar.gz.
File metadata
- Download URL: aio-request-0.1.34.tar.gz
- Upload date:
- Size: 21.9 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/5.1.1 CPython/3.11.10
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | a17a7f74a87e5941aa2cc4d139c04d2245cb39d3a7f3fd605cce235c6b250aeb |
|
| MD5 | 995ca67e19edc2d0829caee9459a7369 |
|
| BLAKE2b-256 | 60b1e6a68a472b866dd2d82a56d2749ea8d96a66912ad547a42a60ac23cf2163 |
Provenance
File details
Details for the file aio_request-0.1.34-py3-none-any.whl.
File metadata
- Download URL: aio_request-0.1.34-py3-none-any.whl
- Upload date:
- Size: 26.0 kB
- Tags: Python 3
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/5.1.1 CPython/3.11.10
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | b0b09db2a87cbea88a894c61c7a5274f3ecfe87363d4f381a93777a597149f0d |
|
| MD5 | 8baed8e9561d8a01349b1ef4882668f8 |
|
| BLAKE2b-256 | cd7882ff64ff749462ded2a4b0710aa05f8444f00cc30f5a64578140ebd8e2eb |
