MFC下载网络文件到本地计算机

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此方法依赖wininet.lib

属性 - 配置属性 - 链接器 - 输入 - 附加依赖项 - 编辑

实现代码如下

#include "WinInet.h"

#define MAXBLOCKSIZE 1024

/*!

* @brief 下载一个文件到本地计算机

*

* @param const CString& url 文件链接

* @param const CString& savePath 文件保存到本地计算机的文件夹路径

*

* @return bool 下载成功返回true

*

* @author 刘杰达

*/

bool Application::downloadFileToLocal(const CString& url, const CString& savePath)

{

bool ret = false;

byte Temp[1024];

ULONG Number = 1;

char * szSavePath = CStringtochar(savePath);

FILE *stream;

HINTERNET hSession = InternetOpen(L"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(szSavePath, "wb")) != NULL)

{

while (Number > 0)

{

InternetReadFile(handle2, Temp, MAXBLOCKSIZE - 1, &Number);

fwrite(Temp, sizeof(char), Number, stream);

}

fclose(stream);

ret = true;

}

InternetCloseHandle(handle2);

handle2 = NULL;

}

InternetCloseHandle(hSession);

hSession = NULL;

}

if (szSavePath != NULL)

{

delete[] szSavePath;

}

return ret;

}

char *CStringtochar(CString str)

{

char *ptr;

#ifdef _UNICODE

LONG len;

len = WideCharToMultiByte(CP_ACP, 0, str, -1, NULL, 0, NULL, NULL);

ptr = new char[len + 1]; memset(ptr, 0, len + 1);

WideCharToMultiByte(CP_ACP, 0, str, -1, ptr, len + 1, NULL, NULL);

#else

ptr = new char[str.GetAllocLength() + 1];

sprintf(ptr, _T("%s"), str);

#endif

return ptr;

}