update-client/Common/HttpHelper.h

#pragma once
#include <QObject>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QJsonObject>
#include <QJsonDocument>
#include <QEventLoop>
#include <QDebug>

class HttpHelper
{
public:
    // Each request owns its manager so synchronous calls cannot share reply state.
    static void postRequest(const QString& url, const QJsonObject& jsonBody,
        std::function<void(int code, const QJsonObject& resp)> callback);
};