int main(int argc, char** argv)
{QApplication app(argc, argv);QFileInfo jsFileInfo(QDir::currentPath() + "/qwebchannel.js");if (!jsFileInfo.exists())QFile::copy(":/qtwebchannel/qwebchannel.js",jsFileInfo.absoluteFilePath());// setup the QWebSocketServerQWebSocketServer server(QStringLiteral("QWebChannel Standalone Example Server"), QWebSocketServer::NonSecureMode);if (!server.listen(QHostAddress::LocalHost, 12345)) {qFatal("Failed to open web socket server.");return 1;}// wrap WebSocket clients in QWebChannelAbstractTransport objectsWebSocketClientWrapper clientWrapper(&server);// setup the channelQWebChannel channel;QObject::connect(&clientWrapper, &WebSocketClientWrapper::clientConnected,&channel, &QWebChannel::connectTo);// setup the UIDialog dialog;// setup the core and publish it to the QWebChannelCore core(&dialog);channel.registerObject(QStringLiteral("core"), &core);// open a browser window with the client HTML pageQUrl url = QUrl::fromLocalFile(BUILD_DIR "/index.html");QDesktopServices::openUrl(url);dialog.displayMessage(Dialog::tr("Initialization complete, opening browser at %1.").arg(url.toDisplayString()));dialog.show();return app.exec();
}

<script type="text/javascript" src="./qwebchannel.js"></script>
<script type="text/javascript">//BEGIN SETUPfunction output(message) {var output = document.getElementById("output");output.innerHTML = output.innerHTML + message + "n";}window.onload = function() {if (location.search != "")var baseUrl = (/[?&]webChannelBaseUrl=([A-Za-z0-9-:/.]+)/.exec(location.search)[1]);elsevar baseUrl = "ws://localhost:12345";output("Connecting to WebSocket server at " + baseUrl + ".");var socket = new WebSocket(baseUrl);socket.onclose = function() {console.error("web channel closed");};socket.onerror = function(error) {console.error("web channel error: " + error);};socket.onopen = function() {output("WebSocket connected, setting up QWebChannel.");new QWebChannel(socket, function(channel) {// make core object accessible globallywindow.core = channel.objects.core;document.getElementById("send").onclick = function() {var input = document.getElementById("input");var text = input.value;if (!text) {return;}output("Sent message: " + text);input.value = "";core.receiveText(text);}core.sendText.connect(function(message) {output("Received message: " + message);});core.receiveText("Client connected, ready to send/receive messages!");output("Connected to WebChannel, ready to send/receive messages!");});}}//END SETUP
</script>