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websocket-jetty-server not able to upgrade request to websocket [message #1863940]

Thu, 07 March 2024 11:46

Yash Sharma

Messages: 1
Registered: March 2024

Junior Member

I am trying to make websocket connection using html and javascript.
My client is as follows
const socketUrl = "ws://host:port/example";
const socket = new WebSocket(socketUrl);[

And I have Servlet as follows

@WebServlet(name = "WebSocket Servlet", urlPatterns = { "/example" })
public class MyWSServlet extends JettyWebSocketServlet
{

@Override
public void configure(JettyWebSocketServletFactory factory) {
factory.setIdleTimeout(Duration.ofSeconds(1000));
factory.register(MySocket.class);
factory.addMapping("/", (req,res)->new MySocket());
}
}

@WebSocket
public class MySocket{
@OnWebSocketConnect
public void onConnect(Session session) {
System.out.println("Connect: " + session.getRemoteAddress());
}
}

I am using websocket-jetty-server dependency in pom.xml
When I try to hit the ws api, at server side I see that in upgradeRequest() validateNegotiation returns false and hence request is not upgraded to websocket.

As per chat gpt negotiateHeaders() is responsible to add Upgrade:websocket in request headers. But I do not see that happening in jetty.

I have attached network trace for reference. Can someone please help me with this problem to establish a websocket connection using jetty?

The message that I see in browser is
connection to 'ws://host:port/example' failed: