Re: How to determine if a data blob is a plist ?

FROM : Jeff Disher
DATE : Tue Jan 28 02:19:34 2003

You could create an NSString from the data using:
- (id)initWithData:(NSData *)data encoding:(NSStringEncoding)encoding

I guess you would use the encoding constant for ASCII.  Then you could
send that string the propertyList message.  If it doesn't throw an
exception, it is a property list.

Check the docs on NSString for the details of doing this.

Hope that helps,
Jeff.


On Monday, January 27, 2003, at 02:10 PM, Bob Miller wrote:

> Hello,
>     
>     Can anyone tell me if there is a way to check an NSData object to see
> if it is a valid plist. I want to be able to detect an attempt at
> opening an invalid file in my appl. The appl. archives data using an
> NSKeyArchiver and saves the NSData away. It is possible for a user to
> force the application's file extension to be that of the one used by
> the appl. on a file that was not created by the appl. How is this
> scenario protected against, am I missing something very basic(could
> be.)
>
> Thanks in advance for any help,
> Regards,
> Bob M.
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Jeff Disher
President and Lead Developer of Spectral Class
Spectral Class:  Shedding Light on Innovation
http://www.spectralclass.com/
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