使用WinInet函数简单实现FTP客户端

#include <WinInet.h>

#pragma comment(lib, "WinInet.lib")

bool FTPUpload(const string& strFtpHost, int nPort, const string &strUser, const string &strPwd,

   const string& strLocalFile, const string& strFtpFile, string &strMsg)

{

BOOL dRes,pRes;

HINTERNET hInternet;

HINTERNET hConnect;

const char *pFtpHost = strFtpHost.c_str();

if (nPort==0)

{

nPort = INTERNET_DEFAULT_FTP_PORT;

}

const char *pFtpUser = strUser.c_str();

const char *pFtpPwd = strPwd.c_str();

const char *pLocalFile = strLocalFile.c_str();

const char *pFtpFile = strFtpFile.c_str();

hInternet = InternetOpen("DataClient", INTERNET_OPEN_TYPE_DIRECT,NULL, NULL, INTERNET_FLAG_NO_CACHE_WRITE);

if ( NULL == hInternet )

{ 

//printf("InternetOpen Error:%d ", GetLastError() );

strMsg = "InternetOpen Error";

return false;

}

hConnect  = InternetConnect(hInternet, pFtpHost, nPort, pFtpUser, pFtpPwd, INTERNET_SERVICE_FTP, 

INTERNET_FLAG_EXISTING_CONNECT || INTERNET_FLAG_PASSIVE,0 );

if ( NULL == hInternet )

{

//printf( "InternetConnect Error:%d ", GetLastError() );

strMsg = "InternetConnect Error";

InternetCloseHandle(hInternet);

return false;

}

//dRes = FtpGetFile(hConnect, "./usera/123.txt", "D:\\ftp123.txt", FALSE, FILE_ATTRIBUTE_ARCHIVE, FTP_TRANSFER_TYPE_UNKNOWN, 0);

//if ( dRes == 0 )

//{

// printf( "FtpGetFile Error: ", GetLastError() );

//}

pRes = FtpPutFile(hConnect,pLocalFile,pFtpFile,FTP_TRANSFER_TYPE_BINARY,0);

InternetCloseHandle(hConnect);

InternetCloseHandle(hInternet);

if(pRes==0)

{

//printf("上传文件失败！ ");

strMsg = "FtpPutFile Error";

return false;

}

strMsg="上次成功";

return true;

}