swf format verification?

[Bjoern Schliessmann]

akonsu wrote:

> hello, can someone recommend a good library to verify whether a
> file is in swf format (and ideally flv as well)? i need it to
> enable file uploading on to my web site.

Look how GNU "file" does it:

#------------------------------------------------------------------------------
# flash:        file(1) magic for Macromedia Flash file format
#
# See
#
#       http://www.macromedia.com/software/flash/open/
#
0       string          FWS             Macromedia Flash data,
>3      byte            x               version %d
0       string          CWS             Macromedia Flash data (compressed),
>3      byte            x               version %d
# From: Cal Peake <cp at absolutedigital.net>
0       string          FLV             Macromedia Flash Video

#
# From Dave Wilson
0       string AGD4\xbe\xb8\xbb\xcb\x00 Macromedia Freehand 9 Document

Regards,


Björn

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