client/js/s3/util.js
function(name) {
            if (qq.indexOf(qq.s3.util.UNPREFIXED_PARAM_NAMES, name) >= 0) {
                return name;
            }
            return qq.s3.util.AWS_PARAM_PREFIX + name;
        }
function(name) {
            if (qq.indexOf(qq.s3.util.UNPREFIXED_PARAM_NAMES, name) >= 0) {
                return name;
            }
            return qq.s3.util.AWS_PARAM_PREFIX + name;
        }
function ( name ) { if ( qq . indexOf ( qq . s3 . util . UNPREFIXED_PARAM_NAMES , name ) >= 0 ) { return name ; } return qq . s3 . util . AWS_PARAM_PREFIX + name ; }
Create Prefixed request headers which are appropriate for S3.

If the request header is appropriate for S3 (e.g. Cache-Control) then pass
it along without a metadata prefix. For all other request header parameter names,
apply qq.s3.util.AWS_PARAM_PREFIX before the name.
See: http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectPUT.html
Create Prefixed request headers which are appropriate for S3 .