boto/boto — pull request #950 by moliware (2012-08-31 10:55:21+00:00)
Title: Single operation upload for Vault class. Also a method that decides the ...

...upload method (single operation / multipart)

Now you can do something like

```python
vault.upload_archive('filename')
```
and it decides what upload method should use depending on the file size.

Note: I use utf8 headers instead of unicode to avoid UnicodeDecodeError when httplib is building the http request.