Welcome to QtNetworkNg’s documentation!

QtNetworkNg is a self-contained coroutine-based network toolkit, like boost::asio but uses concepts from QtNetwork and gevent of Python. Compare to boost::asio and Qt’s QtNetwork, QtNetworkNg has more simpler API. As the name suggests, QtNetworkNg requires Qt5 framework. Here comes a simple example to get web pages.

#include <QtCore/QCoreApplication>
#include "qtnetworkng/qtnetworkng.h"

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);
    qtng::HttpSession session;
    qtng::HttpResponse r = session.get("https://news.163.com");
    qDebug() << r.html();
    return 0;
}

And another example to make tcp connection.

#include <QtCore/QCoreApplication>
#include "qtnetworkng/qtnetworkng.h"

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);
    qtng::Socket conn;
    conn.connect("news.163.com", 80);
    conn.sendall("GET / HTTP/1.0\r\n\r\n");
    qDebug() << conn.recv(1024 * 8);
    return 0;
}

To create tcp server.

Socket s;
CoroutineGroup workers;
s.bind(QHostAddress::Any, 8000);
s.listen(100);
while(true) {
    QSharedPointer<Socket> request(s.accept());
    if(request.isNull()) {
        break;
    }
    workers.spawn([request] {
        request->sendall("hello!");
        request->close();
    });
}

A Qt GUI example to fetch web page.

// main.cpp
#include <QApplication>
#include <QTextBrowser>
#include "qtnetworkng/qtnetworkng.h"

using namespace qtng;

class HtmlWindow: public QTextBrowser
{
public:
    HtmlWindow()
        :operations(new CoroutineGroup)
    {
        operations->spawn([this] {
            Coroutine::sleep(1);
            HttpSession session;
            HttpResponse response = session.get("http://qtng.org/");
            if(response.isOk()) {
                setHtml(response.html());
            } else {
                setHtml("failed");
            }
        });
    }

    ~HtmlWindow()
    {
        delete operations;
    }
private:
    CoroutineGroup *operations;
};

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    HtmlWindow w;
    w.show();
    return startQtLoop(); // Qt GUI application start the eventloop using startQtLoop() instead of app.exec()
}

And its project file.

# fetch_web_content.pro
TEMPLATE = app
QT += widgets
SOURCES += main.cpp
include(qtnetworkng/qtnetworkng.pri)

As you can see, networking programming is done with very straightforward API.

Give it a try (for linux).

git clone https://github.com/hgoldfish/qtnetworkng.git
cd qtnetworkng/
qmake-qt5
make -j4   # mingw32-make -j4
./qtnetworkng

More details please refer to these documents:

Indices and tables