FastAPI simple cache

Related tags

FastAPI Utilitiespythonrediscachepyton3fastapi
Overview

FastAPI Cache

Codacy Badge License PyPi Version Downloads Build Status

Implements simple lightweight cache system as dependencies in FastAPI.

Installation

pip install fastapi-cache

Usage example

from fastapi import Depends, FastAPI

from fastapi_cache import caches, close_caches
from fastapi_cache.backends.redis import CACHE_KEY, RedisCacheBackend

app = FastAPI()


def redis_cache():
    return caches.get(CACHE_KEY)


@app.get('/')
async def hello(
    cache: RedisCacheBackend = Depends(redis_cache)
):
    in_cache = await cache.get('some_cached_key')
    if not in_cache:
        await cache.set('some_cached_key', 'new_value', 5)

    return {'response': in_cache or 'default'}


@app.on_event('startup')
async def on_startup() -> None:
    rc = RedisCacheBackend('redis://redis')
    caches.set(CACHE_KEY, rc)


@app.on_event('shutdown')
async def on_shutdown() -> None:
    await close_caches()

TODO

  • Add tests
  • Add registry decorator
  • Add dependency for requests caching

Acknowledgments

  • Balburdia
  • xobtoor

Changelog

  • 0.0.6 Added typings for backends. Specific arguments now need to be passed through **kwargs. Set default encoding to utf-8 for redis backend, removed default TTL for redis keys.
Comments
  • Add support for caching generic types

    Add support for caching generic types

    Reference Issues/PRs

    None

    What does this implement/fix?

    The current version of the package fails to retrieve objects in Redis that cannot be decoded by the default encoding='utf-8' option defined on get. In order to enable a more generic approach this PR refactor the Cache classes changing the value typing (both when setting and when retrieving) to Any, minimizing IDE's warnings, and adds a new optional parameter encoding to RedisCacheBackend.get method, keeping utf-8 as the default value to enable backwards compatibility. A new simple test for the option encoding=None was added.

    opened by Balburdia 3
  • Add support for Redis backend requiring TLS

    Add support for Redis backend requiring TLS

    It looks like the RedisCacheBackend doesn't support specifying the ssl passthrough option to aioredis.create_redis_pool() in order to be able to connect to a Redis endpoint that requires TLS, e.g. ElastiCache in AWS.

    opened by erhhung 1
  • Create expire function

    Create expire function

    This PR will include the aioredis function for expire(key, timeout) in order to automatically invalidate an entry after some time. This is useful when using redis for caching API responses.

    enhancement 
    opened by jersobh 0
  • Add redis function to check if key exists or not

    Add redis function to check if key exists or not

    in our current implementation of redis we use exists a lot to check if a key is already set or not and then decide what to do.

    exists can check multiple keys at once and returns an integer with the number of existing keys.

    https://redis.io/commands/exists

    enhancement 
    opened by stndrf 0
  • How to pass a KEYS pattern when get cache [Redis Backend]?

    How to pass a KEYS pattern when get cache [Redis Backend]?

    Hi guys, I couldn't find anywhere how I can get values from a given key with a pattern. Eg.: project_* where * can be any char.

    I tried something like await cache.get("project_*") but no success.

    Reference: https://redis.io/commands/KEYS

    opened by mauricioribeiro 0
  • Upgrade aioredis to 2.x

    Upgrade aioredis to 2.x

    aioredis 2.x introduces breaking changes in API

    • poo_min_size is dropped, the connection pool is now lazy filled, not pre-filled
    • whether decode or not is decided globally, could not be changed on each top level api (like Redis.get())
    opened by laggardkernel 0
  • ImportError: cannot import name 'FastAPICache' from 'fastapi_cache'

    ImportError: cannot import name 'FastAPICache' from 'fastapi_cache'

    I have the following issue when try running the API from my docker image. Running it locally, has no issue.

    This is my requirements.txt:

    fastapi==0.63.0
fastapi-cache==0.1.0

    Full error message:

    from api.routers import sa_ranking, sa_person_ranking
  File "./api/routers/sa_ranking.py", line 9, in <module>
    from fastapi_cache import FastAPICache
ImportError: cannot import name 'FastAPICache' from 'fastapi_cache' (/usr/local/lib/python3.8/site-packages/fastapi_cache/__init__.py)

    Please help! Urgent need

    opened by chenuratikah 1
  • Can we remove print statement in InMemoryCache?

    Can we remove print statement in InMemoryCache?

    Would it possible to remove below print statements https://github.com/comeuplater/fastapi_cache/blob/2723817a5d6f7d34c736acd09b155c05cd1221d3/fastapi_cache/backends/utils/ttldict.py#L14

    https://github.com/comeuplater/fastapi_cache/blob/2723817a5d6f7d34c736acd09b155c05cd1221d3/fastapi_cache/backends/utils/ttldict.py#L28

    bug 
    opened by herbherbherb 0
Releases(0.0.1)
Owner
Ivan Sushkov
Ivan Sushkov
GitHub Repository
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