app/views/admin/shared/_asset_storage.html.erb
<script>
<% if Slices::Config.s3_storage? %>
slices.S3_UPLOADER_DEFAULTS = {
AWSAccessKeyId : '<%= Slices::Config.s3_credentials[:access_key_id] %>',
acl : 'public-read',
policy : '<%= policy %>',
signature : '<%= signature %>',
success_action_status : '201',
};
slices.S3_URL = 'https://<%= Slices::Config.s3_credentials[:bucket] %>.s3.amazonaws.com/';
slices.S3_TEMPFILE_KEY_PREFIX = '<%= Slices::Config::S3_TEMPFILE_KEY_PREFIX %>';
slices.fileClass = slices.S3File;
<% else %>
slices.fileClass = slices.File;
<% end %>
</script>