curl.hpp

/*
    SPDX-License-Identifier: MIT
    Copyright © 2016-2024 Amebis
*/
 
#pragma once
 
#include "compat.hpp"
#include <curl/curl.h>
#include <string>
#include <stdexcept>
 
namespace stdex
{
    class curl_runtime_error : public std::runtime_error
    {
    public:
        curl_runtime_error(_In_ CURLcode num) :
            runtime_error(curl_easy_strerror(num)),
            m_num(num)
        {}
 
        curl_runtime_error(_In_ CURLcode num, _In_ const std::string& msg) :
            runtime_error(msg + ": " + curl_easy_strerror(num)),
            m_num(num)
        {}
 
        curl_runtime_error(_In_ CURLcode num, _In_z_ const char *msg) :
            runtime_error(std::string(msg) + ": " + curl_easy_strerror(num)),
            m_num(num)
        {}
 
        CURLcode number() const
        {
            return m_num;
        }
 
    protected:
        CURLcode m_num;  
    };
 
    struct curl_easy_cleanup_delete
    {
        void operator()(_In_ CURL* ptr) const
        {
            curl_easy_cleanup(ptr);
        }
    };
 
    using curl = std::unique_ptr<CURL, curl_easy_cleanup_delete>;
 
    struct curl_slist_free_all_delete
    {
        void operator()(_In_ struct ::curl_slist* ptr) const
        {
            curl_slist_free_all(ptr);
        }
    };
 
    using curl_slist = std::unique_ptr<struct ::curl_slist, curl_slist_free_all_delete>;
 
    class curl_initializer
    {
    public:
        curl_initializer(_In_ long flags)
        {
            auto code = curl_global_init(flags);
            if (code != CURLE_OK) _Unlikely_
                throw curl_runtime_error(code, "CURL failed to initialize");
        }
 
        virtual ~curl_initializer()
        {
            curl_global_cleanup();
        }
    };
}