Method metadata

cpp/storage/reader.hpp:93–96

    virtual async::promise<std::vector<std::string>> list_dirs(const std::string& prefix) const = 0;

    virtual async::promise<std::optional<resource_meta>> metadata(const std::string& path) const
    {
        throw reader_error{path, 501, "not_implemented"};
    }

    /**
     * @brief Downloads the resource, whole or slice of it, depending on the range.