curl_wrapper.hpp

/*  This file is part of mastodonpp.
 *  Copyright © 2020 tastytea <tastytea@tastytea.de>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef MASTODONPP_CURL_WRAPPER_HPP
#define MASTODONPP_CURL_WRAPPER_HPP
 
#include "answer.hpp"
 
#include "curl/curl.h"
 
#include <map>
#include <string>
#include <string_view>
#include <variant>
#include <vector>
 
namespace mastodonpp
{
 
using std::map;
using std::string;
using std::string_view;
using std::variant;
using std::vector;
 
enum class http_method
{
    GET,
    POST,
    PATCH,
    PUT,
    DELETE
};
 
using parametermap = map<string, variant<string, vector<string>>>;
 
class CURLWrapper
{
public:
    CURLWrapper();
 
    CURLWrapper(const CURLWrapper &other) = default;
 
    CURLWrapper(CURLWrapper &&other) noexcept = default;
 
    virtual ~CURLWrapper() noexcept;
 
    CURLWrapper& operator=(const CURLWrapper &other) = default;
 
    CURLWrapper& operator=(CURLWrapper &&other) noexcept = default;
 
    inline CURL *get_curl_easy_handle()
    {
        return _connection;
    }
 
protected:
    [[nodiscard]]
    answer_type make_request(const http_method &method, const string_view &uri);
 
private:
    CURL *_connection;
    char _curl_buffer_error[CURL_ERROR_SIZE];
    string _curl_buffer_headers;
    string _curl_buffer_body;
 
    static int writer(char *data, size_t size, size_t nmemb,
                      string *writerData);
 
    void setup_curl();
};
 
} // namespace mastodonpp
 
#endif  // MASTODONPP_CURL_WRAPPER_HPP