how to distinguish the file type of GDataEntryFileDoc

[Neil Ni]

Hi,
I uploaded a powerpoint test.ppt from my google account. However, when
I try to download all my files from my google account, the test.ppt is
of the class GDataEntryFileDoc, instead of the class
GDataEntryPresentationDoc. If I did not upload my powerpoint with ppt
extension, what might be a better way to distinguish the actual file
type?
thanks a lot!

Neil

[Greg Robbins]

This question does not appear to be related to the Objective-C library or the Google Docs API.

If you are trying to determine a file's type, you can sometimes rely on the signature bytes that begin the file.

For example, PowerPoint files should begin with "d0 cf 11 e0 a1 b1 1a e1" according to http://www.forensicswiki.org/wiki/PowerPoint_Presentation_(PPT)

On Mac OS X, you can inspect a file's first bytes with the command line tool hexdump:

hexdump -C /path/to/file  | head

[Neil Ni]

thanks! That is really helpful!

Neil

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