The application-layer must block on writing I/O. We can't return from a write until we've pushed its bytes onto the socket. Otherwise, if the write fails we are unable to deliver its IOException to the application. We would have told the application layer that the write succeeded, but it didn't!

  //                the body from slack is a 0-byte-buffer
  @Override public synchronized void onOpen(WebSocket webSocket, Response response) {
    System.out.println("onOpen: " + response);
  }

  // TOOD(jwilson): decode incoming messages and dispatch them somewhere.
  @Override public void onMessage(WebSocket webSocket, String text) {
    System.out.println("onMessage: " + text);
  }

goupile.fr

// Government of the Netherlands: https://www.government.nl
// Submitted by <******@****.***>
gov.nl

// Group 53, LLC : https://www.group53.com
// Submitted by Tyler Todd <******@****.***>
awsmppl.com

// GünstigBestellen : https://günstigbestellen.de
// Submitted by Furkan Akkoc <******@****.***>
günstigbestellen.de
günstigliefern.de