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nxdumptool/include/tasks/download_data_task.hpp

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/*
* download_data_task.hpp
*
* Copyright (c) 2020-2024, DarkMatterCore <pabloacurielz@gmail.com>.
*
* This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
*
* nxdumptool is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* nxdumptool 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef __DOWNLOAD_DATA_TASK_HPP__
#define __DOWNLOAD_DATA_TASK_HPP__
#include "download_task.hpp"
namespace nxdt::tasks
{
/* Used to hold a buffer + size pair with downloaded data. */
typedef std::pair<char*, size_t> DownloadDataResult;
/* Asynchronous task used to store downloaded data into a dynamically allocated buffer using a URL. */
/* The buffer returned by std::pair::first() must be manually freed by the caller using free(). */
class DownloadDataTask: public DownloadTask<DownloadDataResult, std::string, bool>
{
protected:
/* Set class as non-copyable and non-moveable. */
NON_COPYABLE(DownloadDataTask);
NON_MOVEABLE(DownloadDataTask);
/* Runs in the background thread. */
DownloadDataResult DoInBackground(const std::string& url, const bool& force_https) override final
{
char *buf = nullptr;
size_t buf_size = 0;
/* If the process fails or if it's cancelled, httpDownloadData() will take care of freeing up the allocated memory and returning NULL. */
buf = httpDownloadData(&buf_size, url.c_str(), force_https, DownloadDataTask::HttpProgressCallback, this);
return std::make_pair(buf, buf_size);
}
public:
DownloadDataTask() = default;
};
}
#endif /* __DOWNLOAD_DATA_TASK_HPP__ */