Send an email to Hectane with Qt

CMakeLists.txt

cmake_minimum_required(VERSION 3.1.0 FATAL_ERROR)
project(emailer)

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)

find_package(Qt5Network 5.4 REQUIRED)

add_executable(emailer emailer.cpp)
set_property(TARGET emailer PROPERTY CXX_STANDARD 11)
qt5_use_modules(emailer Network)

emailer.cpp

#include <iostream>

#include <QCoreApplication>
#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QUrl>

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

    // Create the email
    QJsonObject message({
        { "from", "alice@example.com" },
        { "to", QJsonArray({"bob@example.com"}) },
        { "subject", "Test Email" },
        { "text", "This is the body of the email!" }
    });
    QByteArray payload(QJsonDocument(message).toJson());

    // Create a network access manager
    QNetworkAccessManager manager;

    // Create the request for Hectane, running on port 8025 by default
    QNetworkRequest request(QUrl("http://localhost:8025/v1/send"));
    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");

    // Send the request
    QNetworkReply *reply = manager.post(request, payload);

    // Indicate what happened when the request completes and then shutdown
    QObject::connect(reply, &QNetworkReply::finished, [&app, reply]() {
        if (reply->error() == QNetworkReply::NoError) {
            std::cout << "Success! Email delivered." << std::endl;
        } else {
            std::cout << "Error: " << reply->errorString().toStdString() << std::endl;
        }
        app.quit();
    });

    return app.exec();
}