Question

我写了一段代码，通过邮件请求将json发送给我的API Rest;并且有效！

的main.cpp

void replyFinished(QNetworkReply *reply)
{
    reply->deleteLater();
    qDebug() << "reply delete!";
    qDebug() << "https post_request done!";
}

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

    QNetworkAccessManager *manager = new QNetworkAccessManager();

    QUrl url("https://.../");
    QNetworkRequest request(url);
    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");

    QObject::connect(manager, &QNetworkAccessManager::finished, replyFinished);

    quint8 speed = 0x12;
    quint8 accelleration = 0x2b;

    QString json = QString("{\"speed\":\"%1\",\"acceleration\":\"%2\"}").arg(speed).arg(accelleration);

    manager->post(request, json.toUtf8());

    return a.exec();
}

但是当我想在我的程序中集成这段代码时，它不起作用。简而言之，我的程序通过SIGNAL和SLOT机制，一个QByteArray，我从中获取数据并将它们发送到我的API Rest。

这是我的 Header.h

...
class Packet : public QObject
{
    Q_OBJECT

public:
    Packet();

public slots:
    void receivePayload(QByteArray &bufferToJson);
    void replyFinished(QNetworkReply *reply);

private:
    QNetworkAccessManager *m_manager;
    quint8 m_speed;
    quint8 m_accelleration;

public:
    QString json;
};
...

这是我的 class.cpp

Packet::Packet()
    : m_manager { new QNetworkAccessManager }
{
    QObject::connect(m_manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*)));
}

void Packet::replyFinished(QNetworkReply *reply)
{
    reply->deleteLater();
    qDebug() << "reply delete!";
    qDebug() << "https post_request done!";
}

void Packet::receivePayload(QByteArray &bufferToJson){
    m_speed = bufferToJson.at(0);
    m_accelleration = bufferToJson.at(1);

    QUrl url("https://.../");
    QNetworkRequest request(url);
    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
    QString json = QString("{\"speed\":\"%1\",\"acceleration\":\"%2\"}").arg(m_speed).arg(m_accelleration);
    m_manager->post(request, json.toUtf8());
}

我的改变有什么问题？

如何在Qt中向API Rest发帖请求？

0 个答案: