std::string linHttpHandler::send(const std::string & msg, const std::string & adr, int port) const
{
    // create socket
    int socketFD = socket(AF_INET, SOCK_STREAM, 0);

    SocketCloser closeMySocket(socketFD);
    if (socketFD < 0)
    {
        std::cerr << "linHttpHandler: Failed to open socketn";
        throw(std::runtime_error("linHttpHandler: Failed to open socket"));
    }

    // lookup ip address
    hostent *server;
    server = gethostbyname(adr.c_str());
    if (server == NULL)
    {
        std::cerr << "linHttpHandler: Failed to find host with address " << adr << "n";
        throw(std::runtime_error("linHttpHandler: Failed to find host"));
    }

    // fill in the structure
    sockaddr_in server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(port);
    memcpy(&server_addr.sin_addr.s_addr, server->h_addr, server->h_length);

    // connect the socket
    if (connect(socketFD, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
    {
        std::cerr << "linHttpHandler: Failed to connect socketn";
        throw(std::runtime_error("linHttpHandler: Failed to connect socket"));
    }

    // send the request
    size_t total = msg.length();
    ssize_t sent = 0;
    do
    {
        ssize_t bytes = write(socketFD, msg.c_str() + sent, total - sent);
        if (bytes < 0)
        {
            std::cerr << "linHttpHandler: Failed to write message to socketn";
            throw(std::runtime_error("linHttpHandler: Failed to write message to socket"));
        }
        if (bytes == 0)
        {
            break;
        }
        if (bytes)
        {
            sent += bytes;
        }
    } while (sent < total);

    // receive the response
    std::string response;
    total = sizeof(response) - 1;
    int received = 0;
    char buffer[128] = {};
    do
    {
        ssize_t bytes = read(socketFD, buffer, 127);
        if (bytes < 0)
        {
            std::cerr << "linHttpHandler: Failed to read response from socket: " << errno << std::endl;
            throw(std::runtime_error("linHttpHandler: Failed to read response from socket"));
        }
        if (bytes == 0)
        {
            break;
        }
        if (bytes)
        {
            received += bytes;
            response.append(buffer, bytes);
        }
    } while (true);

    if (received == total)
    {
        std::cerr << "linHttpHandler: Failed to store complete response from socketn";
        throw(std::runtime_error("linHttpHandler: Failed to store complete response from socket"));
    }

    return response;
}