How can I get sessionId on server for indentify which connection

[nvc...@gmail.com]

My client code

sockjs = new SockJS(sockjs_url, null, {sessionId : 4 });

On sockjs-node
How can I read client generated sessionId ?
Some kind like this

sockjs_echo.on('connection', function(conn) {
    console.log(conn.sessionId);

[Bryce Kahle]

Try conn._session.session_id

—
Bryce

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[Ken nvc]

I tried, but got "undefined"

[Ken nvc]

My server code

var sockjs      = require('sockjs');
var sockjs_opts = {sockjs_url: "http://cdn.jsdelivr.net/sockjs/0.3.4/sockjs.min.js"};
var sockjs_echo = sockjs.createServer(sockjs_opts);

// sockjs connect
sockjs_echo.on('connection', function(conn) {
    console.log(conn._session.session_id);

Do version /0.3.4 related to this error ?( sessionId undefined)

On Saturday, August 22, 2015 at 2:31:22 AM UTC+7, Ken nvc wrote:

[Ken nvc]

My sockjs-node is 0.3.15

$ npm --depth=-0 list
├── async@1.2.1
├── cron@1.0.9 extraneous
├── hiredis@0.4.0
├── node-static@0.7.6
├── redis@0.12.1
└── sockjs@0.3.15

On Saturday, August 22, 2015 at 2:31:22 AM UTC+7, Ken nvc wrote:

[Bryce Kahle]

It looks like websockets currently don’t populate the session_id property. All the other transports do though. If you are just looking for a unique session id, rather than use what is in the URL. You can use connection.id

—
Bryce

[Ken nvc]

At web client side
How can I get connection_id after sockjs connected ?
And how can I get to know if sockjs is still connected so that I can feel safety when call sockjs.send(...)

On Saturday, August 22, 2015 at 2:31:22 AM UTC+7, Ken nvc wrote:

[Bryce Kahle]

Perhaps you should describe your use case for needing the connection ids?

—
Bryce

[Ken nvc]

My case is:
Web client open websocket with Node server. (currently node server have connection_id)
When web client post data by http xhr request (data include connection_id)  to Django server, then Django server PUBLISH data to Redis.
Node receive SUBSCRIBE data , so Node know this data is sent by which connected client through connection_id in data.

On Saturday, August 22, 2015 at 2:31:22 AM UTC+7, Ken nvc wrote:

[cuon...@dirox.net]

Any suggestion please ?