private void handleContainerExists(HttpServletRequest request,
            HttpServletResponse response, BlobStore blobStore,
            String containerName) throws IOException, S3Exception {
        if (!blobStore.containerExists(containerName)) {
            throw new S3Exception(S3ErrorCode.NO_SUCH_BUCKET);
        }
        addCorsResponseHeader(request, response);
    }
Map XML ACLs to a canned policy if an exact tranformation exists.
src/main/java/org/gaul/s3proxy/S3ProxyHandler.java