fastapi-and-caching

FastAPI and Caching is an extension for FastAPI that provides support for various caching mechanisms, allowing you to easily leverage caching within your FastAPI applications.

Install

pip install fastapi-and-caching

How to Use:

RedisCache

First, configure it as follows:

from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi_and_caching import RedisCache
from config import settings


app = FastAPI()
cache = RedisCache(namespace="fastapi")

@asynccontextmanager
async def lifespan(app: FastAPI):
    await cache.init(connection_url="redis://localhost")

    yield

    await cache.close()

Then you can use it as follows: ‍‍‍

@app.get("/")
@cache.cached(key="root", expire=30, prefix="router")
def root():
    return "FastAPI And Caching"

Cached input parameters:

• key (str, optional): The key under which to store the cached result. Defaults to the function name if not provided.
• expire (int, optional): Time in seconds for the cache to expire. Defaults to 60 seconds.
• prefix (str, optional): A prefix to add to the cache key. Defaults to None.
• none (bool, optional): Whether to cache None values. Defaults to True.
• use_params (bool, optional): Whether to include function parameters in the cache key. Defaults to True.
• key_builder (callable, optional): A custom function to build the cache key. Defaults to None.

Other methods:

cache.keys()

• key (str): The specific key or pattern to search for in the cache.
• prefix (str): A prefix to be added to the key before searching.

cache.get()

• key (str): The key to be used for retrieving the cached value.
• prefix (str, optional): A prefix to be added to the key before retrieving. Defaults to None.
• params (dict, optional): Additional parameters to be considered when generating the cache key. Defaults to None.
• key_builder (typing.Callable, optional): A custom function for building the cache key. Defaults to None.

cache.set()

• key (str): The key under which to store the value in the cache.
• value (str): The value to be stored in the cache.
• expire (int, optional): Time in seconds for the cache entry to expire. Defaults to None.
• prefix (str, optional): A prefix to be added to the key before storing. Defaults to None.
• params (dict, optional): Additional parameters to be considered when generating the cache key. Defaults to None.
• key_builder (typing.Callable, optional): A custom function for building the cache key. Defaults to None.
• **kwargs: Additional keyword arguments to be passed to the cache backend's set method.

cache.exists()

• key (str): The key to check for existence in the cache.
• prefix (str, optional): A prefix to be added to the key before checking. Defaults to None.

cache.expire()

• key (str): The key for which to set the expiration time.
• seconds (int): The number of seconds until the key expires.

cache.delete()

• key (str): The key to be deleted from the cache.
• prefix (str, optional): A prefix to be added to the key before deletion. Defaults to None.
• params (dict, optional): Additional parameters to be considered when generating the cache key. Defaults to None.

cache.delete_startswith()

• key (str): The pattern to match at the beginning of cache keys.
• prefix (str, optional): A prefix to be added to the key before deletion. Defaults to None.
• params (dict, optional): Additional parameters to be considered when generating the cache key. Defaults to None.