You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
3.7 KiB
109 lines
3.7 KiB
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
//=======================================================================================//
|
|
|
|
#ifndef CL_DOWNLOADER_H
|
|
#define CL_DOWNLOADER_H
|
|
#ifdef _WIN32
|
|
#pragma once
|
|
#endif
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
|
|
#include "platform.h"
|
|
#include "engine/http.h"
|
|
#include "interface.h"
|
|
#include "tier0/threadtools.h"
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
|
|
struct RequestContext_t;
|
|
class CHttpDownloader;
|
|
class KeyValues;
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
|
|
class IDownloadHandler
|
|
{
|
|
public:
|
|
virtual void OnConnecting( CHttpDownloader *pDownloader ) = 0;
|
|
virtual void OnFetch( CHttpDownloader *pDownloader ) = 0;
|
|
|
|
// Called when the download is done successfully, errors out, or is aborted.
|
|
// NOTE: pDownloader should NOT be deleted from within OnDownloadComplete().
|
|
// pData contains the downloaded data for processing.
|
|
virtual void OnDownloadComplete( CHttpDownloader *pDownloader, const unsigned char *pData ) = 0;
|
|
};
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
|
|
//
|
|
// Generic downloader class - downloads a single file on its own thread, and maintains
|
|
// state for that data.
|
|
//
|
|
// TODO: Derive from CBaseThinker and remove explicit calls to Think() - will make this
|
|
// class less bug-prone (easy to forget to call Think()).
|
|
//
|
|
class CHttpDownloader
|
|
{
|
|
public:
|
|
// Pass in a callback
|
|
CHttpDownloader( IDownloadHandler *pHandler = NULL );
|
|
~CHttpDownloader();
|
|
|
|
//
|
|
// Download the file at the given URL (HTTP/HTTPS support only)
|
|
// pGamePath - Game path where we should put the file - can be NULL if we don't
|
|
// want to save to the file to disk
|
|
// pUserData - Passed back to IDownloadHandler, if one has been set - can be NULL
|
|
// pBytesDownloaded - If non-NULL, # of bytes downloaded written.
|
|
// Returns true on success.
|
|
//
|
|
bool BeginDownload( const char *pURL, const char *pGamePath = NULL,
|
|
void *pUserData = NULL, uint32 *pBytesDownloaded = NULL );
|
|
|
|
//
|
|
// Abort the download (if there is one), wait for the download to shutdown and
|
|
// do cleanup.
|
|
//
|
|
void AbortDownloadAndCleanup();
|
|
|
|
inline bool IsDone() const { return m_bDone; } // Download done?
|
|
inline bool CanDelete() const { return m_pThreadState == NULL; } // Can free?
|
|
inline HTTPStatus_t GetStatus() const { return m_nHttpStatus; }
|
|
inline HTTPError_t GetError() const { return m_nHttpError; }
|
|
inline void *GetUserData() const { return m_pUserData; }
|
|
inline uint32 GetBytesDownloaded() const { return m_uBytesDownloaded; }
|
|
inline uint32 GetSize() const { return m_uSize; } // File size in bytes - NOTE: Not valid until the download is complete, aborted, or errored out
|
|
inline const char *GetURL() const { return m_szURL; }
|
|
|
|
void Think();
|
|
|
|
KeyValues *GetOgsRow( int nErrorCounter ) const;
|
|
|
|
static const char *GetHttpErrorToken( HTTPError_t nError );
|
|
|
|
private:
|
|
bool CleanupThreadIfDone();
|
|
void InvokeHandler();
|
|
|
|
RequestContext_t *m_pThreadState;
|
|
float m_flNextThinkTime;
|
|
bool m_bDone;
|
|
HTTPError_t m_nHttpError;
|
|
HTTPStatus_t m_nHttpStatus;
|
|
uint32 m_uBytesDownloaded;
|
|
uint32 *m_pBytesDownloaded; // Passed into BeginDownload()
|
|
uint32 m_uSize;
|
|
IDownloadHandler *m_pHandler;
|
|
void *m_pUserData;
|
|
char m_szURL[512];
|
|
|
|
// Use this to make sure that AbortDownloadAndCleanup isn't executed simultaneously
|
|
// by two threads. This was causing use-after-free crashes during shutdown.
|
|
CThreadMutex m_lock;
|
|
};
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
|
|
#endif // CL_DOWNLOADER_H
|