Server.java

package io.vertx.example.core.http.upload;

import io.vertx.core.AbstractVerticle;
import io.vertx.core.file.AsyncFile;
import io.vertx.core.file.OpenOptions;
import io.vertx.core.streams.Pump;
import io.vertx.example.util.Runner;

import java.util.UUID;

/*
 * @author <a href="http://tfox.org">Tim Fox</a>
 */
public class Server extends AbstractVerticle {

  // Convenience method so you can run it in your IDE
  public static void main(String[] args) {
    Runner.runExample(Server.class);
  }

  @Override
  public void start() throws Exception {
    vertx.createHttpServer().requestHandler(req -> {
      req.pause();
      String filename = UUID.randomUUID() + ".uploaded";
      vertx.fileSystem().open(filename, new OpenOptions(), ares -> {
        AsyncFile file = ares.result();
        Pump pump = Pump.pump(req, file);
        req.endHandler(v1 -> file.close(v2 -> {
          System.out.println("Uploaded to " + filename);
          req.response().end();
        }));
        pump.start();
        req.resume();
      });
    }).listen(8080);
  }
}