Class Server

example/keep-alive/main.cpp:112–163

//////////////////////////////////////////////////////////////////////////

using namespace qhttp::server;
///////////////////////////////////////////////////////////////////////////////
struct Server : public QHttpServer
{
    using QHttpServer::QHttpServer;

    int start(quint16 port) {
        connect(this, &QHttpServer::newConnection, [this](QHttpConnection*){
            printf("a new connection has been come!\n");
        });

        bool isListening = listen(
                QString::number(port),
                [this](QHttpRequest* req, QHttpResponse* res){
                   req->collectData(512);
                   req->onEnd([this, req, res](){
                        process(req, res);
                   });
        });

        if ( !isListening ) {
            qDebug("can not listen on %d!\n", port);
            return -1;
        }

        return qApp->exec();
    }

    void process(QHttpRequest* req, QHttpResponse* res) {
        auto root = QJsonDocument::fromJson(req->collectedData()).object();

        if ( root.isEmpty()  ||  root.value("name").toString() != QLatin1Literal("add") ) {
            const static char KMessage[] = "Invalid json format!";
            res->setStatusCode(qhttp::ESTATUS_BAD_REQUEST);
            res->addHeader("connection", "close");
            res->addHeaderValue("content-length", strlen(KMessage));
            res->end(KMessage);
            return;
        }

        int total = 0;
        auto args = root.value("args").toArray();
        for ( const auto jv : args ) {
            total += jv.toInt();
        }
        root["args"] = total;

        QByteArray body = QJsonDocument(root).toJson();
        res->addHeader("connection", "keep-alive");
        res->addHeaderValue("content-length", body.length());
        res->setStatusCode(qhttp::ESTATUS_OK);
        res->end(body);
    }
}; // struct server
///////////////////////////////////////////////////////////////////////////////
} // namespace server
///////////////////////////////////////////////////////////////////////////////