Help: Quickstart example not working

[tariksetia]

Versions:

fastapi-cache2==0.2.2
fastapi-cache2[redis]==0.2.2

.venv ❯ python --version
Python 3.12.4

Redis:
docker run -d --name redis-stack-server -p 6379:6379 redis/redis-stack-server:7.4.0-v0

Code:

from collections.abc import AsyncIterator
from contextlib import asynccontextmanager
import time

from fastapi import FastAPI
from starlette.requests import Request
from starlette.responses import Response

from fastapi_cache import FastAPICache
from fastapi_cache.backends.redis import RedisBackend
from fastapi_cache.decorator import cache

from redis import asyncio as aioredis
import uvicorn


@asynccontextmanager
async def lifespan(_: FastAPI) -> AsyncIterator[None]:
    redis = aioredis.from_url("redis://0.0.0.0")
    FastAPICache.init(RedisBackend(redis), prefix="fastapi-cache")
    yield


app = FastAPI(lifespan=lifespan)


@cache()
async def get_cache():
    return 1


@app.get("/")
@cache(expire=10)
async def index(request: Request):
    return time.time()


if __name__ == "__main__":
    uvicorn.run(app, port=8000)

Screen.Recording.2024-10-11.at.6.55.13.PM.mov

Issue:: Every time I hit http://0.0.0.0:8000/ I get a new value of time, even within 10 seconds

[jameswinegar]

Enable debug logging. I am guessing that you're not actually connecting to redis on 0.0.0.0

[vicchi]

@tariksetia Thanks for getting in touch. Unfortunately I can't reproduce this.

$ uname -a
Darwin garys-m1-mbp-e.vicchi.xyz 24.1.0 Darwin Kernel Version 24.1.0: Thu Oct 10 21:03:15 PDT 2024; root:xnu-11215.41.3~2/RELEASE_ARM64_T6000 arm64

$ docker --version
Docker version 27.3.1, build ce1223035a

$ which python
/Users/gary/Projects/personal/quickstart/.direnv/python-3.13/bin/python

$ python --version
Python 3.13.0

$ docker pull redis/redis-stack-server:7.4.0-v0
...
$ docker run -d --name redis-stack-server -p 6379:6379 redis/redis-stack-server:7.4.0-v0
...

$ ./quickstart-test.py

First test ...

> GET http://localhost:8000/
< 200 OK
< date: Sat, 09 Nov 2024 10:35:44 GMT
< server: uvicorn
< content-length: 18
< content-type: application/json
< cache-control: max-age=10
< etag: W/-2101217112019676328
< x-fastapi-cache: MISS

Second test ...

> GET http://localhost:8000/
< 200 OK
< date: Sat, 09 Nov 2024 10:36:01 GMT
< server: uvicorn
< content-length: 17
< content-type: application/json
< cache-control: max-age=6
< etag: W/8484820968731344498
< x-fastapi-cache: HIT

Third test (after waiting 15 seconds) ...

> GET http://localhost:8000/
< 200 OK
< date: Sat, 09 Nov 2024 10:37:03 GMT
< server: uvicorn
< content-length: 17
< content-type: application/json
< cache-control: max-age=10
< etag: W/9133270487873532393
< x-fastapi-cache: MISS

Fourth test ...

> GET http://localhost:8000/
< 200 OK
< date: Sat, 09 Nov 2024 10:37:26 GMT
< server: uvicorn
< content-length: 17
< content-type: application/json
< cache-control: max-age=9
< etag: W/6747949079204684616
< x-fastapi-cache: HIT

I've also repeated the tests on an X86_64 box running Ubuntu 22.04 with the same results

$ uname -a
Linux hopper.vicchi.xyz 6.8.0-48-generic #48~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Oct  7 11:24:13 UTC 2 x86_64 x86_64 x86_64 GNU/Linux