3 files changed, 105 insertions, 0 deletions
diff --git a/testing/xpcshell/node-ws/examples/server-stats/index.js b/testing/xpcshell/node-ws/examples/server-stats/index.js
new file mode 100644
index 0000000000..e8754b5b28
--- /dev/null
+++ b/testing/xpcshell/node-ws/examples/server-stats/index.js
@@ -0,0 +1,33 @@
+'use strict';
+
+const express = require('express');
+const path = require('path');
+const { createServer } = require('http');
+
+const { WebSocketServer } = require('../..');
+
+const app = express();
+app.use(express.static(path.join(__dirname, '/public')));
+
+const server = createServer(app);
+const wss = new WebSocketServer({ server });
+
+wss.on('connection', function (ws) {
+  const id = setInterval(function () {
+    ws.send(JSON.stringify(process.memoryUsage()), function () {
+      //
+      // Ignore errors.
+      //
+    });
+  }, 100);
+  console.log('started client interval');
+
+  ws.on('close', function () {
+    console.log('stopping client interval');
+    clearInterval(id);
+  });
+});
+
+server.listen(8080, function () {
+  console.log('Listening on http://localhost:8080');
+});
diff --git a/testing/xpcshell/node-ws/examples/server-stats/package.json b/testing/xpcshell/node-ws/examples/server-stats/package.json
new file mode 100644
index 0000000000..20e2029133
--- /dev/null
+++ b/testing/xpcshell/node-ws/examples/server-stats/package.json
@@ -0,0 +1,9 @@
+{
+  "author": "",
+  "name": "serverstats",
+  "version": "0.0.0",
+  "repository": "websockets/ws",
+  "dependencies": {
+    "express": "^4.16.4"
+  }
+}
diff --git a/testing/xpcshell/node-ws/examples/server-stats/public/index.html b/testing/xpcshell/node-ws/examples/server-stats/public/index.html
new file mode 100644
index 0000000000..a82815af6f
--- /dev/null
+++ b/testing/xpcshell/node-ws/examples/server-stats/public/index.html
@@ -0,0 +1,63 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Server stats</title>
+    <style>
+      table, td {
+        border: 1px solid #333;
+      }
+
+      thead {
+        background-color: #333;
+        color: #fff;
+      }
+    </style>
+  </head>
+  <body>
+    <h1>Server stats</h1>
+    <table>
+      <thead>
+        <tr>
+          <th colspan="2">Memory usage</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr>
+          <td>RSS</td>
+          <td id="rss"></td>
+        </tr>
+        <tr>
+          <td>Heap total</td>
+          <td id="heapTotal"></td>
+        </tr>
+        <tr>
+          <td>Heap used</td>
+          <td id="heapUsed"></td>
+        </tr>
+        <tr>
+          <td>External</td>
+          <td id="external"></td>
+        </tr>
+      </tbody>
+    </table>
+    <script>
+      (function() {
+        const rss = document.getElementById('rss');
+        const heapTotal = document.getElementById('heapTotal');
+        const heapUsed = document.getElementById('heapUsed');
+        const external = document.getElementById('external');
+        const ws = new WebSocket(`ws://${location.host}`);
+
+        ws.onmessage = function(event) {
+          const data = JSON.parse(event.data);
+
+          rss.textContent = data.rss;
+          heapTotal.textContent = data.heapTotal;
+          heapUsed.textContent = data.heapUsed;
+          external.textContent = data.external;
+        };
+      })();
+    </script>
+  </body>
+</html>