Can I directly download files from Box to IBM Cloud Object Storage?

Question

What I want to achieve is to download files from Box directly to my COS bucket without downloading it to my local computer. I want to run this code in IBM Cloud Functions so I need to establish this direct download somehow.

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()

The problem is the upload_large_file function is looking for an absolute path of the file downloaded to my computer. I also tried to generate a shared link of the file and paste that there but it did not work.