如何使用博托流文件了亚马逊S3来Rackspace公司Cloudfiles？

问题描述

我复制从S3文件到Cloudfiles，我想，以避免该文件写入磁盘。 Python的-Cloudfiles图书馆有一个object.stream（）调用看起来是我需要什么，但我不能找到博托等效呼叫。我希望我能做到这样的：

I'm copying a file from S3 to Cloudfiles, and I would like to avoid writing the file to disk. The Python-Cloudfiles library has an object.stream() call that looks to be what I need, but I can't find an equivalent call in boto. I'm hoping that I would be able to do something like:

shutil.copyfileobj(s3Object.stream(),rsObject.stream())

这可能与博托（或我想任何其他S3库）？

Is this possible with boto (or I suppose any other s3 library)?

推荐答案

在博托重点对象，从而重新presents对象在S3中，可以将其用作一个迭代器，所以你应该能够做这样的事

The Key object in boto, which represents on object in S3, can be used like an iterator so you should be able to do something like this:

>>> import boto
>>> c = boto.connect_s3()
>>> bucket = c.lookup('garnaat_pub')
>>> key = bucket.lookup('Scan1.jpg')
>>> for bytes in key:
...   write bytes to output stream

或者，在你的例子中，你可以做：

Or, as in the case of your example, you could do:

>>> shutil.copyfileobj(key, rsObject.stream())

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