Hi,
i'm having problems starting a QWebSocketServer from within a
QMainWindow. Perhaps i'm missing something obvious?
When starting it from the main.cpp it works correctly and i can connect
to it from my sample html page. But inside a QMainWindow e.g. after
clicking a button my html page refuses to connect with "Error in
connection establishment: net::ERR_CONNECTION_REFUSED"
Below is a small sample app. Just un/comment accordingly when testing
both cases.
Regards,
A. Jäkel
main.cpp
#include <QApplication>
#include <QMainWindow>
#include <QWebSocketServer>
#include "mainwindow.h"
int main(int argc, char** argv)
{
QApplication app(argc, argv);
// comment the following lines when trying websocketserver from
mainwindow
QWebSocketServer server(QStringLiteral("QWebSocketServer"),
QWebSocketServer::NonSecureMode);
if (!server.listen(QHostAddress::LocalHost, 12345)) {
qFatal("Failed to open web socket server.");
}
MainWindow w;
w.show();
return app.exec();
}
mainwindow.cpp
#include "mainwindow.h"
#include <QWebSocketServer>
#include <QPushButton>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent)
{
// uncomment this for not working websocketserver in mainwindow
// QPushButton *button = new QPushButton("start server");
// setCentralWidget(button);
// connect(button, &QPushButton::clicked, this,
&MainWindow::buttonClicked);
}
void MainWindow::buttonClicked()
{
// uncomment this for not working websocketserver in mainwindow
// QWebSocketServer server(QStringLiteral("QWebSocketServer"),
QWebSocketServer::NonSecureMode);
// if (!server.listen(QHostAddress::LocalHost, 12345)) {
// qFatal("Failed to open web socket server.");
// }
}
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow() {}
void buttonClicked();
};
#endif // MAINWINDOW_H
index.html
<html>
<head>
<script type="text/javascript">
window.onload = function() {
var baseUrl = "ws://localhost:12345";
console.info("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.onmessage = function(e)
{
console.info("message: " + e.data);
};
socket.onopen = function()
{
console.warn("WebSocket connected.");
}
}
</script>
</head>
<body>
</body>
</html>
.pro file
QT += gui widgets websockets
SOURCES += \
main.cpp \
mainwindow.cpp
HEADERS += \
mainwindow.h
DISTFILES += \
index.html
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