Python 2.7 如何使用Web2py自定义下载功能

我正在web2py中开发一个简单的webapp，我想创建一个链接，让用户下载一个文件。像这样：

<a href="{{=URL('download',args = FILE)}}" download>

<a href="{{=URL('custom_download',args = FILEID)}}" download>

def custom_download(): 
    download_row = db(db.computers.FILEID == request.args(0)).select()
    download_file = download_row.filefield
    return download_file

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但是，我不完全确定我需要写什么才能让它工作。

我假设您的文件存储在

上传

文件夹中，那么您的自定义下载功能将是：

def custom_download():      
    download_row = db(db.computers.FILEID == request.args(0)).select().first()
    download_file = download_row.filefield

    # Name of file is table_name.field.XXXXX.ext, so retrieve original file name
    org_file_name = db.computers.filefield.retrieve(download_file)[0]
    file_header = "attachment; filename=" + org_file_name

    response.headers['ContentType'] = "application/octet-stream"
    response.headers['Content-Disposition'] = file_header

    file_full_path = os.path.join(request.folder, 'uploads', download_file)
    fh = open(file_full_path, 'rb')
    return response.stream(fh)