form_data.h

#ifndef _FORM_DATA_H
#define _FORM_DATA_H
/*
 * Fledge utilities functions for handling HTTP form data upload
 * with multipart data
 *
 * Copyright (c) 2022 Dianomic Systems
 *
 * Released under the Apache 2.0 Licence
 *
 * Author: Massimiliano Pinto
 */

#include <logger.h>
#include <server_http.hpp>

#define CR '\r'
#define LF '\n'

class FormData {
    public:
        class FieldValue {
            public:
                FieldValue()
                {
                    size = 0;
                    start = NULL;
                };
                const uint8_t*  start;
                size_t      size;
                std::string filename;
        };

    public:
        FormData(std::shared_ptr<SimpleWeb::Server<SimpleWeb::HTTP>::Request> request);
        void        getUploadedData(const std::string& field, FieldValue& data);
        void        getUploadedFile(const std::string& field, FieldValue& data);
        bool        saveFile(FieldValue& b, const std::string& fileName);

    private:
        uint8_t*    skipSeparator(uint8_t *b);
        uint8_t*    skipDoubleSeparator(uint8_t *b);
        uint8_t*    getContentEnd(uint8_t *b);
        uint8_t*    findDataFormField(uint8_t* buffer, const std::string& field);

    private:
        const uint8_t*  m_buffer;   // pointer to already allocated buffer data
        size_t      m_size;     // buffer size
        std::string m_boundary; // multipart boundary
};
#endif