Get users online from Web API

examples/users.js

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+//
+//  users.js
+//  examples
+//
+//  Created by David Rowe on 9 Mar 2015.
+//  Copyright 2015 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+var usersWindow = (function () {
+
+    var API_URL = "https://metaverse.highfidelity.io/api/v1/users?status=online",
+        HTTP_GET_TIMEOUT = 60000,  // ms = 1 minute
+        usersRequest,
+        processUsers,
+        usersTimedOut,
+        usersTimer,
+        UPDATE_TIMEOUT = 1000;  // ms = 1s
+
+    function requestUsers() {
+        usersRequest = new XMLHttpRequest();
+        usersRequest.open("GET", API_URL, true);
+        usersRequest.timeout = HTTP_GET_TIMEOUT * 1000;
+        usersRequest.ontimeout = usersTimedOut;
+        usersRequest.onreadystatechange = processUsers;
+        usersRequest.send();
+    }
+
+    processUsers = function () {
+        if (usersRequest.readyState === usersRequest.DONE) {
+            if (usersRequest.status === 200) {
+                // TODO: Process users data
+            } else {
+                print("Error: Request for users status returned " + usersRequest.status + " " + usersRequest.statusText);
+            }
+
+            usersTimer = Script.setTimeout(requestUsers, UPDATE_TIMEOUT);  // Update  while after finished processing.
+        }
+    };
+
+    usersTimedOut = function () {
+        print("Error: Request for users status timed out");
+        usersTimer = Script.setTimeout(requestUsers, HTTP_GET_TIMEOUT);  // Try again after a longer delay.
+    };
+
+    function setUp() {
+
+        requestUsers();
+    }
+
+    function tearDown() {
+        Script.clearTimeout(usersTimer);
+
+    }
+
+    setUp();
+    Script.scriptEnding.connect(tearDown);
+}());