Websocket chat message does not prolong HttpSessio

问题:

I have Java Spring Application, that has Chat endpoint served though WebSocket. User logs in using API calls and session has timeout 10 mins.

In order to start Chat I have to connect to WebSocket endpoint. It does connect, no problem, but the thing is that: each chat message sent from client does not prolong logged in HttpSession, so after 10 mins it times out.

How can I make chat message via WebSocket connecting to prolong HttpSession? Other words saying: how can I reset HttpSession timeout timer to 10 mins on each message sent via WebSocket?

Using reflection method I get HttpSession from WebSocket session and then I call setMaxInactiveInterval() method to reset session timeout timer, but it does not work, session still times out after 10 mins, even if I send many messages in between.

@OnMessage
public void onMessage(Session session, String message) {
    HttpSession httpSession = getHttpSession(session);
    processMessage(message);
    int initialTimeout = httpSession.getMaxInactiveInterval(); // returns 600 (10 mins) 
    httpSession.setMaxInactiveInterval(initialTimeout);
}

I need to find the way Spring extends the session on each API call and probably do it same way. Does anyone knows how Spring does it?

回答1:

As you are not using HTTP when sending data through a WebSocket connection, the HTTP session will eventually timeout and this will also make your WebSocket connections close (as described in the JSR-356).

An easy solution to keep the HTTP session alive when using Spring WebSockets would be using Spring Session along.