Enable a CDN for your Discourse

Canapin · August 26, 2022, 3:55pm

Thank you for this clue!

I guess it’s this?

DbHelper.remap('from', 'to')

Found on Rebaking old posts won't pull new S3 CDN URL after S3 bucket rename - #10 by Brad_Wood

And used here:

github.com

discourse/discourse/blob/1472e47aae5bfdfb6fd9abfe89beb186c751f514/lib/file_store/to_s3_migration.rb#L289


      
            raise failure_message
          elsif s3_objects.size + synced >= local_files.size
            log "Updating the URLs in the database..."
          
            from = "/uploads/#{@current_db}/original/"
            to = "#{SiteSetting.Upload.s3_base_url}/#{prefix}"
          
            if @dry_run
              log "REPLACING '#{from}' WITH '#{to}'"
            else
              DbHelper.remap(from, to, anchor_left: true)
            end
          
            [
              [
                "src=\"/uploads/#{@current_db}/original/(\\dX/(?:[a-f0-9]/)*[a-f0-9]{40}[a-z0-9\\.]*)",
                "src=\"#{SiteSetting.Upload.s3_base_url}/#{prefix}\\1"
              ],
              [
                "src='/uploads/#{@current_db}/original/(\\dX/(?:[a-f0-9]/)*[a-f0-9]{40}[a-z0-9\\.]*)",
                "src='#{SiteSetting.Upload.s3_base_url}/#{prefix}\\1"

If it’s a safe alternative to a rebake when changing our CDN service, a howto could be nice indeed.

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