如何在Google App Engine上传时记录Google Cloud Storage响应头

from google.cloud import storage

def upload_file(file_path, bucket_name, destination_blob_name):
    # 创建存储桶客户端
    storage_client = storage.Client()

    # 获取存储桶
    bucket = storage_client.get_bucket(bucket_name)

    # 创建Blob对象
    blob = bucket.blob(destination_blob_name)

    # 设置自定义的响应头
    blob.metadata = {'x-custom-header': 'custom-value'}

    # 上传文件
    blob.upload_from_filename(file_path)

    print(f"文件 {file_path} 已成功上传到存储桶 {bucket_name} 中的 {destination_blob_name}。")

upload_file('path/to/file.txt', 'my-bucket', 'uploaded-file.txt')