共享文件存储限时活动

import os
from datetime import datetime, timedelta

class SharedFileStorage:
    def __init__(self, storage_path, expiration_date):
        self.storage_path = storage_path
        self.expiration_date = expiration_date

    def upload_file(self, file_name, content):
        if datetime.now() < self.expiration_date:
            with open(os.path.join(self.storage_path, file_name), 'wb') as file:
                file.write(content)
            print(f"File '{file_name}' uploaded successfully.")
        else:
            print("Upload failed: Storage promotion has expired.")

    def download_file(self, file_name):
        if datetime.now() < self.expiration_date:
            if os.path.exists(os.path.join(self.storage_path, file_name)):
                with open(os.path.join(self.storage_path, file_name), 'rb') as file:
                    return file.read()
            else:
                print(f"File '{file_name}' not found.")
        else:
            print("Download failed: Storage promotion has expired.")

# Example usage
storage = SharedFileStorage('/path/to/storage', datetime.now() + timedelta(days=7))
storage.upload_file('example.txt', b'Hello, World!')
content = storage.download_file('example.txt')
print(content)