How to tell when a Stomp server disconnected from the Stomp.JS client

问题

I am sending a stomp message over a Sock.JS client. When I disconnect the server I would like a warning message to show up on the client. To do this I have implemented a server side heartbeat...

stompClient = Stomp.over(socket);
stompClient.heartbeat.outgoing = 20000;
stompClient.heartbeat.incoming = 20000;
stompClient.connect({}, function(frame) {
  ...
}

In the Chrome developer console I see the message...

POST http://localhost:8080/hello/800/8n_btbxb/xhr_streaming net::ERR_CONNECTION_RESET sockjs-0.3.min.js:27
Whoops! Lost connection to undefined

But I am not sure how to capture this error in the JS. I am sure I am missing something easy but a little help would be great.

回答1:

As pointed out by muttonUp stomp.js from https://github.com/jmesnil/stomp-websocket/ will overwrite the onclose handler. On the other hand it provides the option to pass an error-callback on connect:

stompClient.connect({}, function(frame) {
    ...
}, function(message) {
    // check message for disconnect
});

Since you will get several kinds of errors delivered to your callback, you have to check the message it it was indeed the "Whoops! [...]" which indicates a connection loss.

回答2:

Oops just figured it out I will delete in a bit if it doesn't help others. I needed to use SockJS client instead of the Stomp one...

var socket = new SockJS('/hello');
...
socket.onclose = function() {
    console.log('close');
    stompClient.disconnect();
    setConnected();
};

来源：https://stackoverflow.com/questions/24513818/how-to-tell-when-a-stomp-server-disconnected-from-the-stomp-js-client

标签

stomp

sockjs