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There are some images in one site of mine which are hosted to a remote server. I haven't figured out yet how to set Cache-Control to remote sources. For local files I'm using:

location ~* \.(jpg|jpe?g|gif|png|ico|cur|gz|svgz|mp4|ogg|ogv|webm|htc|css|js|otf|eot|svg|ttf|woff|woff2)(\?ver=[0-9.]+)?$ {
    expires 1M;
    add_header Access-Control-Allow-Origin '*';
    add_header Pragma public;
    add_header Cache-Control "public, must-revalidate, proxy-revalidate";
    access_log off;
    }

Which is working great.

I tried to add a location block containing the remote location of the files following the same principle with the local file, say for example https://example.com/img/ but nginx didnt do anything. The purpose of all this is to increase site speed.

Any suggestions will be appreciated.

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You can't change the headers for remote resources by changing anything on your server. You need to change them on the server that's serving the files.

The only way I can think to achieve this would be to proxy the images through a dedicated path on your server, but that would require changing the HTML to point to that path.

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  • in other words, to save the remote images to my server, then change the image path to my html. Correct? – Skeptic Sep 17 '16 at 17:40
  • Yes, that's correct. – Tim Sep 17 '16 at 18:25

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