// For a chunked upload you don't need to specify size, just do:
// req.setChunked(true);
vertx.fileSystem().open(filename, new AsyncResultHandler<AsyncFile>() {
public void handle(AsyncResult<AsyncFile> ar) {
final AsyncFile file = ar.result;
Pump pump = Pump.createPump(file.getReadStream(), req);
pump.start();
file.getReadStream().endHandler(new SimpleHandler() {
public void handle() {
file.close(new AsyncResultHandler<Void>() {
public void handle(AsyncResult<Void> ar) {
if (ar.exception == null) {
req.end();
System.out.println("Sent request");
} else {