file_source.hpp

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#pragma once
 
#include <roar/curl/source.hpp>
 
#include <cstddef>
#include <filesystem>
#include <fstream>
#include <optional>
 
namespace Roar::Curl
{
    class FileSource : public Source
    {
      public:
        explicit FileSource(std::filesystem::path const& filename);
 
        std::size_t fetch(char* buffer, std::size_t amount) override;
        std::size_t size() override;
 
      private:
        std::ifstream reader_;
        std::optional<std::size_t> memoizedFileSize_;
    };
}