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我想要实现的是将 Box 中的文件直接下载到我的 COS 存储桶中，而无需将其下载到我的本地计算机。我想在 IBM Cloud Functions 中运行此代码，因此我需要以某种方式建立此直接下载。

def main(args):
    config = JWTAuth.from_settings_file('test_config.json')
    client = Client(config)
    print(client.user('me').get())

    #set the path to folder
    folderId = "131511144823"
    #filename we need
    file_we_looking_for = "test.xls"

    files_to_download = {}
    #get all items in box folder
    items_in_folder = client.folder(folder_id=folderId).get_items()
    for item in items_in_folder:
        if file_we_looking_for == item.name:
            print(item.name)
            files_to_download[item.id] = item.name

    #upload the file straight to object storage
    cos_client_conn = get_cos_client_connection()
    upload_large_file(cos_client_conn,'test','exceltestfrombox', files_to_download.keys()[0])


def upload_large_file(cos_cli, bucket_name, item_name, file_path):
    print("Starting large file upload for {0} to bucket: {1}".format(item_name, bucket_name))

    # set the chunk size to 5 MB
    part_size = 1024 * 1024 * 5

    # set threadhold to 5 MB
    file_threshold = 1024 * 1024 * 5


    # set the transfer threshold and chunk size in config settings
    transfer_config = ibm_boto3.s3.transfer.TransferConfig(
        multipart_threshold=file_threshold,
        multipart_chunksize=part_size
    )

    # create transfer manager
    transfer_mgr = ibm_boto3.s3.transfer.TransferManager(cos_cli, config=transfer_config)

    try:
        # initiate file upload
        future = transfer_mgr.upload(file_path, bucket_name, item_name)

        # wait for upload to complete
        future.result()

        print ("Large file upload complete!")
    except Exception as e:
        print("Unable to complete large file upload: {0}".format(e))
    finally:
        transfer_mgr.shutdown()

问题是upload_large_file函数正在寻找下载到我的计算机的文件的绝对路径。我还尝试生成文件的共享链接并将其粘贴到那里，但它不起作用。

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