C++下载指定Url网络地址上的文件-Windows Api

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#include <stdio.h> #include <Windows.h>#include <wininet.h> #pragma comment (lib,"User32.lib")#pragma comment( lib,"Urlmon.lib")#pragma comment( lib, "wininet.lib") #define MAXBLOCKSIZE 1024/**-----download(const char *Url,const char *save_as)--------------------函数功能：将指定的Url地址的文件下载到本地函数参数：Url：文件所指向的网络地址save_as：文件保存到本地的路径地址-------------------------------------------------------------------------**/void download(const char *Url,const char *save_as)/*将Url指向的地址的文件下载到save_as指向的本地文件*/  {  byte Temp[MAXBLOCKSIZE];  ULONG Number = 1;  FILE *stream;  HINTERNET hSession = InternetOpen("RookIE/1.0", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);  if (hSession != NULL)  {  HINTERNET handle2 = InternetOpenUrl(hSession, Url, NULL, 0, INTERNET_FLAG_DONT_CACHE, 0);  if (handle2 != NULL)  {  if( (stream = fopen( save_as, "wb" )) != NULL )  {  while (Number > 0)  {  InternetReadFile(handle2, Temp, MAXBLOCKSIZE - 1, &Number);  fwrite(Temp, sizeof (char), Number , stream);  }  fclose( stream );  }  InternetCloseHandle(handle2);  handle2 = NULL;  }  InternetCloseHandle(hSession);  hSession = NULL;  }  } int WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow){/*****第1种、使用自带的WindowsAPI-URLDownloadToFile()函数下载文件******//*char *url = "http://imgsrc.baidu.com/forum/pic/item/596da61ea8d3fd1f750432d8304e251f94ca5f2d.jpg";HRESULT hr = URLDownloadToFile(0,url,"mypic.jpg",0,NULL);*//*****第2种、使用download()函数下载文件******/MessageBox(NULL,"正在下载","下载",MB_OK);download("http://imgsrc.baidu.com/forum/pic/item/596da61ea8d3fd1f750432d8304e251f94ca5f2d.jpg","mypic.jpg");MessageBox(NULL,"下载完成","下载",MB_OK);return 0;}
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