differentiate pdf and ppt

sarvan has asked for the wisdom of the Perl Monks concerning the following question:

Hi all,

Is there any way to differentiate pdf from ppt by analyzing the content of those documents. Because,it is possible for a pdf document to have ppt content and also ppt to have pdf content.

So, i need to know any clues from the document can be used to differentiate. Because in my work i will get a url. From that url i need to make sure that the document and its content is pdf or ppt..

Need help in this plz... Thanks.

Comment on differentiate pdf and ppt

Replies are listed 'Best First'.
Re: differentiate pdf and ppt by Anonymous Monk on Aug 31, 2011 at 10:45 UTC
File::LibMagic	[reply]
Re: differentiate pdf and ppt by bart (Canon) on Aug 31, 2011 at 11:37 UTC
If you read the first few bytes of a PDF file, it always starts with "%PDF" and the version number. I think that is all you need.	[reply]
Re^2: differentiate pdf and ppt by sarvan (Sexton) on Sep 05, 2011 at 18:21 UTC
Hi bart, Can you please tell me how can i do that.	[reply]
Re^3: differentiate pdf and ppt by bart (Canon) on Sep 05, 2011 at 20:15 UTC
Sheesh, I would think that even any beginner in Perl should be able to tackle this. The tasks you have to do: read the first few bytes of the file (at least 4 bytes) into a string see if the string starts with '%PDF'	[reply]
Re^3: differentiate pdf and ppt by Anonymous Monk on Sep 05, 2011 at 18:35 UTC
Read perlintro and you'll learn how	[reply]