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/*
* The Mana Client
* Copyright (C) 2009-2012 The Mana Developers
*
* This file is part of The Mana Client.
*
* This program 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 2 of the License, or
* 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 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 <http://www.gnu.org/licenses/>.
*/
#include "utils/mutex.h"
#include <cstdio>
#include <optional>
#include <string>
#include <curl/curl.h>
#pragma once
enum class DownloadStatus
{
InProgress,
Canceled,
Error,
Complete
};
struct SDL_Thread;
namespace Net {
class Download
{
public:
struct State
{
DownloadStatus status = DownloadStatus::InProgress;
float progress = 0.0f;
};
Download(const std::string &url);
~Download();
void addHeader(const char *header);
/**
* Convience method for adding no-cache headers.
*/
void noCache();
void setFile(const std::string &filename,
std::optional<unsigned long> adler32 = {});
void setUseBuffer();
/**
* Starts the download thread.
* @returns whether the thread could be created
*/
bool start();
/**
* Cancels the download. Returns immediately, the canceled status will
* be noted in the next available update call.
*/
void cancel();
/**
* Returns a view on the downloaded data.
*/
std::string_view getBuffer() const;
State getState();
const char *getError() const;
static unsigned long fadler32(FILE *file);
private:
static int downloadProgress(void *clientp,
curl_off_t dltotal, curl_off_t dlnow,
curl_off_t ultotal, curl_off_t ulnow);
static size_t writeBuffer(char *ptr, size_t size, size_t nmemb,
void *stream);
static int downloadThread(void *ptr);
ThreadSafe<State> mState;
std::string mUrl;
bool mCancel = false;
bool mMemoryWrite = false;
std::string mFileName;
std::optional<unsigned long> mAdler;
SDL_Thread *mThread = nullptr;
curl_slist *mHeaders = nullptr;
char mError[CURL_ERROR_SIZE];
/** Byte count currently downloaded in mMemoryBuffer. */
size_t mDownloadedBytes = 0;
/** Buffer for files downloaded to memory. */
char *mBuffer = nullptr;
};
inline Download::State Download::getState()
{
return *mState.lock();
}
inline const char *Download::getError() const
{
return mError;
}
} // namespace Net
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