如何在不将任何内容写入python中的文件系统的情况下压缩或压缩静态文件夹? [英] How to zip or tar a static folder without writing anything to the filesystem in python?

问题描述

我了解这个问题.但是您无法在应用引擎(shutil或zipfile需要创建文件)中写入文件系统.

I know about this question. But you can’t write to filesystem in app engine (shutil or zipfile require creating files).

因此，基本上，我需要使用zip或tar存档类似/base/nacl的内容，并将输出写入Web浏览器，询问页面(输出永远不会超过32 Mb).

So basically I need to archive something like/base/naclusing zip or tar, and write the output to the web browser asking the page (the output will never exceed 32 Mb).

推荐答案

碰巧我今晚不得不解决完全相同的问题:)这对我有用:

It just happened that I had to solve the exact same problem tonight :) This worked for me:

    import StringIO
    import tarfile

    fd = StringIO.StringIO()

    with tarfile.open(mode="w:gz", fileobj=fd) as tgz:
        tgz.add('dir_to_download')

    self.response.headers['Content-Type'] ='application/octet-stream'
    self.response.headers['Content-Disposition'] = 'attachment; filename="archive.tgz"'

    self.response.write(fd.getvalue())

要点:

• 使用StringIO来伪造内存中的文件
• 使用fileobj直接将伪文件的对象传递给tarfile.open()(如果您更喜欢gzip而不是tarfile，则gzip.GzipFile()也支持)
• 设置标题以将响应显示为可下载文件

• used StringIO to fake a file in memory
• used fileobj to pass directly the fake file's object to tarfile.open() (also supported by gzip.GzipFile() if you prefer gzip instead of tarfile)
• set headers to present the response as a downloadable file

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