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copied!<p>Well, that's because <a href="http://nodejs.org/api/net.html#net_class_net_server" rel="nofollow"><code>net.server</code></a> uses <a href="http://nodejs.org/api/net.html#net_class_net_socket" rel="nofollow"><code>net.socket</code></a>. To get the totals, you will have to add <code>bytesRead</code> and <code>bytesWritten</code> to the totals once the socket is closed. Example:</p> <pre><code>const net = require("net"); var server = net.createServer(function (c) { c.on('close', function () { // add to the totals server.bytesSent += c.bytesWritten; server.bytesReceived += c.bytesRead; }); c.write('Hello world!\r\n'); c.pipe(c); c.end(); }); server.bytesReceived = 0; server.bytesSent = 0; server.listen(3000); var time = process.hrtime(); setInterval(function (){ process.stdout.write('\u001B[2J\u001B[0;0f'); var diff = process.hrtime(time)[0] + process.hrtime(time)[1]/1000000000; var bpsSent = Math.round(server.bytesSent/diff) || 0; var bpsReceived = Math.round(server.bytesReceived/diff) || 0; console.log("Running node.js %s on %s-%s", process.version, process.platform, process.arch); console.log("Memory usage: %d bytes", process.memoryUsage().rss); console.log("Uptime: %ds", Math.round(process.uptime())); console.log("Open connections: %d", server.connections); console.log("In: %d bytes (%d bytes/s)", server.bytesReceived, bpsReceived); console.log("Out: %d bytes (%d bytes/s)", server.bytesSent, bpsSent); }, 100); </code></pre> <p>If you need to update the totals in real-time (when data is received/sent), you can instead add the length of the buffers directly to the totals when they are written/read. This is especially good when you have sockets that are open for a long time and transferring large amounts of data.</p> <pre><code>var server = net.createServer(function (c) { var oldWrite = c.write; c.write = function(d) { if (!Buffer.isBuffer(d)) { d = new Buffer(d); } oldWrite.call(this, d); server.bytesSent += d.length; }; c.on('data', function(d){ server.bytesReceived += d.length; }); c.write('Hello world!\r\n'); c.pipe(c); c.end(); }); </code></pre>

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