qthttpserver/examples/httpserver/simple/main.cpp

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#include <QtCore>
#include <QtHttpServer>

static inline QString host(const QHttpServerRequest &request)
{
    return request.headers()[QStringLiteral("Host")].toString();
}

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);

    QHttpServer httpServer;
    httpServer.route("/", []() {
        return "Hello world";
    });

    httpServer.route("/query", [] (const QHttpServerRequest &request) {
        return QString("%1/query/").arg(host(request));
    });

    httpServer.route("/query/", [] (qint32 id, const QHttpServerRequest &request) {
        return QString("%1/query/%2").arg(host(request)).arg(id);
    });

    httpServer.route("/query/<arg>/log", [] (qint32 id, const QHttpServerRequest &request) {
        return QString("%1/query/%2/log").arg(host(request)).arg(id);
    });

    httpServer.route("/query/<arg>/log/", [] (qint32 id, float threshold,
                                              const QHttpServerRequest &request) {
        return QString("%1/query/%2/log/%3").arg(host(request)).arg(id).arg(threshold);
    });

    httpServer.route("/user/", [] (const qint32 id) {
        return QString("User %1").arg(id);
    });

    httpServer.route("/user/<arg>/detail", [] (const qint32 id) {
        return QString("User %1 detail").arg(id);
    });

    httpServer.route("/user/<arg>/detail/", [] (const qint32 id, const qint32 year) {
        return QString("User %1 detail year - %2").arg(id).arg(year);
    });

    httpServer.route("/json/", [] {
        return QJsonObject{
            {
                {"key1", "1"},
                {"key2", "2"},
                {"key3", "3"}
            }
        };
    });

    httpServer.route("/assets/<arg>", [] (const QUrl &url) {
        return QHttpServerResponse::fromFile(QStringLiteral(":/assets/%1").arg(url.path()));
    });

    const auto port = httpServer.listen(QHostAddress::Any);
    if (port == -1) {
        qDebug() << QCoreApplication::translate(
                "QHttpServerExample", "Could not run on http://127.0.0.1:%1/").arg(port);
        return 0;
    }

    qDebug() << QCoreApplication::translate(
            "QHttpServerExample", "Running on http://127.0.0.1:%1/ (Press CTRL+C to quit)").arg(port);

    return app.exec();
}