[NaCl SDK] Add NetworkMonitor example.

native_client_sdk/src/examples/api/network_monitor/example.js

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Called by the common.js module.
+function moduleDidLoad() {
+  // The module is not hidden by default so we can easily see if the plugin
+  // failed to load.
+  common.hideModule();
+}
+
+// Called by the common.js module.
+function handleMessage(message) {
+  if (typeof message.data === "string") {
+    // We got an error from the NaCl module.
+    common.logMessage('Error: ' + message.data);
+    return;
+  }
+
+  // We expect that the message looks like this:
+  // [{
+  //    name: "...", displayName: "...", state: "...", type: "...", MTU: 1234,
+  //    ipAddresses: ["...", "..."]},
+  //  {...},
+  // ]
+  //
+  // Append a <tr> to the <tbody> for each interface in the array.
+  // The order in the .html file is:
+  // index, display name, name, type, state, ip addresses, MTU.
+  var net_interfaces = message.data;
+
+  var tbodyEl = document.querySelector('tbody');
+  // First, clear the tbody.
+  while (tbodyEl.firstChild) {
+    tbodyEl.removeChild(tbodyEl.firstChild);
+  }
+
+  for (var i = 0; i < net_interfaces.length; ++i) {
+    var net_interface = net_interfaces[i];
+    var trEl = document.createElement('tr');
+    trEl.appendChild(makeTd(i));
+    trEl.appendChild(makeTd(net_interface.displayName));
+    trEl.appendChild(makeTd(net_interface.name));
+    trEl.appendChild(makeTd(net_interface.type));
+    trEl.appendChild(makeTd(net_interface.state));
+    // ipAddresses is an array of strings. Let's join them with a comma.
+    trEl.appendChild(makeTd(net_interface.ipAddresses.join(', ')));
+    trEl.appendChild(makeTd(net_interface.MTU));
+    tbodyEl.appendChild(trEl);
+  }
+}
+
+function makeTd(text) {
+  var tdEl = document.createElement('td');
+  tdEl.textContent = text;
+  return tdEl;
+}