[Rails] Add expire header for images stored in amazon s3

Hello everyone Good Morning,

  I done adding expire header by put the following code into my product model.

    :s3_headers => { 'Cache-Control' => 'max-age=315576000', 'Expires' => 10.years.from_now.httpdate },

  But its work only while i add new product and image.

  Already i have 100 of products and images. How can i add expire header for those which already exist products.

Please advice.

Regards

Saravanan P

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