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Please cancel this.

On 12/13/05, Han Holl <han.holl / gmail.com> wrote:
>
> Hi,
>
> Because ruby-libexif no longer works with libexif-0.6.12, I decided to
> roll my own Exif class.
> Quick and dirty.
> And got a surprising error message.
>
> Here's the program:
> #!/usr/bin/ruby
>
> #require 'exif'
>
> class Exif < Hash
>   @@want = %w{ DateTimeOriginal DateTime ImageDescription PixelYDimension
> }
>   def initialize(file)
>
>     IO.popen("exiv2 -pt '#{file}'") do |h|
>       h.each do |line|
>         a = line.split[0].split(/\./)[2].strip
>         if @@want.include?(a)
>           self[a] = line[60 .. -1].strip
>         end
>       end
>     end
>   end
> end
>
> def run
>   exif = Exif.new('/var/pictures/alpujaras/img_0528_edited.jpg')
>   puts exif['DateTimeOriginal']
>   exif = Exif.new('/bin/ls')
>   puts exif['DateTimeOriginal']
>   next if exif.empty?
>   puts "won't get here"
> end
>
> run
> ### End-of-ruby-program
>
> If I run this, I get:
> 2005:01:04 13:22:48
> Exiv2 exception in print action for file /bin/ls:
> /bin/ls: The file contains data of an unknown image type
> nil
> ./add_captions.rb:25:in `run': unexpected next (LocalJumpError)
>         from ./add_captions.rb:29
>
> For a real JPEG it works fine, but things get ugly otherwise:
>
> I can't quite figure out what this means.
>
> Cheers,
>
> Han Holl
>

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