正在尝试缓存s3文件

import boto3
from botocore.exceptions import ClientError

s3_client = boto3.client('s3')

def get_file(bucket, key):
    try:
        response = s3_client.get_object(Bucket=bucket, Key=key)
        return response['Body'].read()
    except ClientError as e:
        print(f"Error reading file from S3: {e}")
        return None

import redis

redis_client = redis.Redis(host='localhost', port=6379, db=0)

def get_file_with_cache(bucket, key):
    cached_data = redis_client.get(key)
    if cached_data:
        return cached_data
    
    file_data = get_file(bucket, key)
    if file_data:
        redis_client.setex(key, 3600, file_data)  # Cache for 1 hour
        return file_data
    
    # Cache the absence of data for a short period
    redis_client.setex(key, 60, '')
    return None

import random

def set_cache_with_random_expiration(key, data):
    expiration_time = 3600 + random.randint(-600, 600)  # 1 hour ± 10 minutes
    redis_client.setex(key, expiration_time, data)