Function validateID

src/common/validation.cpp:46–77

namespace validation {

Option<Error> validateID(const string& id)
{
  if (id.empty()) {
    return Error("ID must not be empty");
  }

  if (id.length() > NAME_MAX) {
    return Error(
        "ID must not be greater than " +
        stringify(NAME_MAX) + " characters");
  }

  // The ID cannot be exactly these special path components.
  if (id == "." || id == "..") {
    return Error("'" + id + "' is disallowed");
  }

  // Rules on invalid characters in the ID:
  // - Control characters are obviously not allowed.
  // - Slashes are disallowed as IDs are likely mapped to directories in Mesos.
  auto invalidCharacter = [](char c) {
    return iscntrl(c) ||
           c == os::POSIX_PATH_SEPARATOR ||
           c == os::WINDOWS_PATH_SEPARATOR;
  };

  if (std::any_of(id.begin(), id.end(), invalidCharacter)) {
    return Error("'" + id + "' contains invalid characters");
  }

  return None();
}


// These IDs are valid as long as they meet the common ID requirements