Selenium 4 and testsession - selenium

Question

I've been running on Selenium 4 for a few months now. Mostly, all good.
One issue keeps biting me and so far I've been unable to find a workaround.
I'm trying to find which node a test is running on (not even test just browser session).
Prior version of Selenium I called this API on the hub with the session id returned from driver.getSessionId()
http://<grid>s:4444/grid/api/testsession?session=<sessionid>
Response included:
String internalKey;
String msg;
String proxyId;
String session;
boolean success;
Most important for me was proxyId which revealed the node name.
That API no longer works. 404
I'm surprised this is not a big topic.I've looked around for docs with no luck.
How do you folks find the node running a browser session in a grid?

Answer 1

The Selenium documentation provides exactly one example you can take for reference:
curl -X POST -H "Content-Type: application/json" --data '{"query":"{ session (id: \"<session-id>\") { id, capabilities, startTime, uri, nodeId, nodeUri, sessionDurationMillis, slot { id, stereotype, lastStarted } } } "}' -s <LINK_TO_GRAPHQL_ENDPOINT>
I am able to get the required details,
URL url = new URL("http://localhost:4444/graphql");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
String sessionId = "456731";
String query = "{ \"query\": \"{ session (id: \\\""+sessionId+"\\\") { id, capabilities, startTime, uri, nodeId, nodeUri, sessionDurationMillis, slot { id, stereotype, lastStarted } } } \"}";
OutputStream os = conn.getOutputStream();
os.write(query.getBytes());
os.flush();
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line);
sb.append(System.getProperty("line.separator"));
}
String result = sb.toString();
System.out.println("API Response .... \n" + result);
conn.disconnect();