Function serialize_multipart_formdata_item_begin

examples/server/httplib.h:4268–4283

template <typename T>
inline std::string
serialize_multipart_formdata_item_begin(const T &item,
                                        const std::string &boundary) {
  std::string body = "--" + boundary + "\r\n";
  body += "Content-Disposition: form-data; name=\"" + item.name + "\"";
  if (!item.filename.empty()) {
    body += "; filename=\"" + item.filename + "\"";
  }
  body += "\r\n";
  if (!item.content_type.empty()) {
    body += "Content-Type: " + item.content_type + "\r\n";
  }
  body += "\r\n";

  return body;
}

inline std::string serialize_multipart_formdata_item_end() { return "\r\n"; }