WebSocket closing down on sending Base64 encode Strings

Question

I'm trying to send a base64 encoded string (converted from a image) via websocket and this is working fine for me with a javascript client.

But if I use a java client (@clientEndPoint) instead, onMessage function is triggered once and the websocket connection immediately closes down. No errors.

Again, I tried sending plain strings from the server and the java client functions properly. But just not with base64 encoded strings.

I'm using Tomcat 7.0.69 and below are the code snippets:

Server End Point:

if (imageToBeSend != null) {
   encodedImage = new sun.misc.BASE64Encoder().encode(imageToBeSend);
   session.getBasicRemote().sendText(encodedImage);
   }

Java client:

@ClientEndpoint
public class SomeClass {
    CountDownLatch latch = new CountDownLatch(1);
    private Session session;
    String msg;

    @OnOpen
    public void open(Session session) {
        this.session = session; 
        //some stuff
    }

    @OnClose
    public void close(Session session) {
        System.out.println("Closing the connection");
    }

    @OnError
    public void onError(Throwable error) {
        System.out.println("!!!ERROR!!!!!" + error);
        error.printStackTrace();
    }

    @OnMessage
    public void handleMessage(String message, Session session) throws IOException {
     System.out.println("got the json string  "+message.length());
     // more stuff
    }

Here the handle message is invoked one time and the corresponding sysout is printed and then immediately onClose is invoked. onError is never invoked.

WebSocket closing down on sending Base64 encode Strings

0 Answers0