Chunked.h

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/*
 * snode.c - a slim toolkit for network communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef WEB_HTTP_DECODER_CHUNK_H
#define WEB_HTTP_DECODER_CHUNK_H
 
#include "web/http/ContentDecoder.h" // IWYU pragma: export
 
namespace core::socket::stream {
    class SocketContext;
}
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <cstddef>
#include <string>
#include <vector>
 
#endif // DOXYGEN_SHOULD_SKIP_THIS
 
namespace web::http::decoder {
 
    class Chunked : public web::http::ContentDecoder { // Extends decoder
    private:
        class Chunk {
        public:
            Chunk() = default;
 
            Chunk(const Chunk&) = delete;
            Chunk(Chunk&&) noexcept = default;
 
            Chunk& operator=(const Chunk&) = delete;
            Chunk& operator=(Chunk&&) noexcept = default;
 
            ~Chunk();
 
            inline std::size_t read(const core::socket::stream::SocketContext* socketContext);
 
            bool isError() const;
            bool isComplete() const;
 
            std::vector<char>::iterator begin();
            std::vector<char>::iterator end();
 
            std::size_t size();
 
        private:
            std::vector<char> chunk;
 
            std::string chunkLenTotalS;
            std::size_t chunkLenTotal = 0;
            std::size_t chunkLenRead = 0;
 
            int state = 0;
 
            bool CR = false;
            bool LF = false;
 
            bool error = false;
            bool completed = false;
        };
 
    public:
        explicit Chunked(const core::socket::stream::SocketContext* socketContext);
 
        Chunked(const Chunked&) = delete;
        Chunked(Chunked&&) noexcept = default;
 
        Chunked& operator=(const Chunked&) = delete;
        Chunked& operator=(Chunked&&) noexcept = default;
 
    private:
        std::size_t read() override;
 
        const core::socket::stream::SocketContext* socketContext;
 
        Chunk chunk;
 
        int state = 0;
    };
 
} // namespace web::http::decoder
 
#endif // WEB_HTTP_DECODER_CHUNK_H