@POST
@Path("/pack")
@Consumes(MediaType.APPLICATION_JSON)
@Produces({"application/zip"})
public Response pack(final Data data) {

    Response.ResponseBuilder builder = null;
    StreamingOutput strm = null;

        strm = new StreamingOutput() {
            public void write(OutputStream output) {
                try {

                    serv.pack(data.getDest(),  output);

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };

    return Response.ok(strm).build();
}

$scope.download = function () {

    var responsePromise = $http({

        url: urlPack,
        method: "POST",
        data: JSON.stringify({dest:$scope.dest}),
        responseType: 'arraybuffer'

    });

    responsePromise.success(function (data, status) {

            var file = new Blob([data], { type: 'application/zip' });
            saveAs(file, 'msgs.zip');

    });
};