Method build_smtp_file

demo_example/smtp/smtp_client.cpp:275–305

    }

    void build_smtp_file(std::ostream &out) {
        if (data_.filepath.empty()) {
            return;
        }

        std::string filename = data_.filepath.substr(
            data_.filepath.find_last_of(get_separator()) + 1);
        out << "--async_simple\r\nContent-Type: application/octet-stream; "
               "name=\""
            << filename << "\"\r\n";
        out << "Content-Transfer-Encoding: base64\r\n";
        out << "Content-Disposition: attachment; filename=\"" << filename
            << "\"\r\n";
        out << "\r\n";

        std::string file_content = load_file_contents(data_.filepath);
        size_t file_size = file_content.size();

        std::string encoded = base64_encode(file_content);

        int SEND_BUF_SIZE = 1024;

        int no_of_rows = (int)file_size / SEND_BUF_SIZE + 1;

        for (int i = 0; i != no_of_rows; ++i) {
            std::string sub_buf =
                encoded.substr(i * SEND_BUF_SIZE, SEND_BUF_SIZE);

            out << sub_buf << "\r\n";
        }
    }

    void build_request() {
        std::ostream out(&request_);