C/C++ 实现通过FTP上传下载

实现FTP文件下载:

#include <stdio.h>
#include <Windows.h>
#include <WinInet.h>
#pragma comment(lib, "WinInet.lib")

BOOL Ftp_SaveToFile(char *pszFileName, BYTE *pData, DWORD dwDataSize)
{
	HANDLE hFile = CreateFile(pszFileName, GENERIC_READ | GENERIC_WRITE,
		FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_ALWAYS,
		FILE_ATTRIBUTE_ARCHIVE, NULL);
	if (INVALID_HANDLE_VALUE == hFile)
		return FALSE;

	DWORD dwRet = 0;
	WriteFile(hFile, pData, dwDataSize, &dwRet, NULL);
	CloseHandle(hFile);
	return TRUE;
}

BOOL FTP_Download(char *szHostName, char *szUserName, char *szPassword, char *szUrlPath,char *SavePath)
{
	HINTERNET hInternet, hConnect, hFTPFile = NULL;
	BYTE *pDownloadData = NULL;
	DWORD dwDownloadDataSize = 0;
	DWORD dwBufferSize = 4096;
	BYTE *pBuf = NULL;
	DWORD dwBytesReturn = 0;
	DWORD dwOffset = 0;
	BOOL bRet = FALSE;

	// 建立会话
	hInternet = InternetOpen("WinInet Ftp", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
	// 建立连接
	hConnect = InternetConnect(hInternet, szHostName, INTERNET_INVALID_PORT_NUMBER, 
		szUserName, szPassword, INTERNET_SERVICE_FTP, INTERNET_FLAG_PASSIVE, 0);
	
	// 打开FTP文件, 文件操作和本地操作相似
	hFTPFile = FtpOpenFile(hConnect, szUrlPath, GENERIC_READ, FTP_TRANSFER_TYPE_BINARY | INTERNET_FLAG_RELOAD, NULL);
	// 获取文件大小
	dwDownloadDataSize = FtpGetFileSize(hFTPFile, NULL);
	// 申请动态内存
	pDownloadData = new BYTE[dwDownloadDataSize];

	RtlZeroMemory(pDownloadData, dwDownloadDataSize);
	pBuf = new BYTE[dwBufferSize];
	RtlZeroMemory(pBuf, dwBufferSize);
	// 接收数据
	do
	{
		bRet = InternetReadFile(hFTPFile, pBuf, dwBufferSize, &dwBytesReturn);
		if (FALSE == bRet)
			break;
		RtlCopyMemory((pDownloadData + dwOffset), pBuf, dwBytesReturn);
		dwOffset = dwOffset + dwBytesReturn;
	} while (dwDownloadDataSize > dwOffset);

	// 将数据保存为文件
	Ftp_SaveToFile(SavePath, pDownloadData, dwDownloadDataSize);
	// 释放内存
	delete[]pDownloadData;
	pDownloadData = NULL;
	return TRUE;
}

int main(int argc,char * argv[])
{
	// FTP主机地址 用户名 密码 下载网络文件地址 保存到本机文件夹
	BOOL bRET = FTP_Download("192.168.1.10", "lyshark", "123321", "/Xuetr.exe","c://xuetr.exe");
	printf("%d \n", bRET);

	system("pause");
	return 0;
}

实现FTP文件上传:

#include <stdio.h>
#include <Windows.h>
#include <WinInet.h>
#pragma comment(lib, "WinInet.lib")

BOOL FTP_Upload(char *szHostName, char *szUserName, char *szPassword, char *szUrlPath, char *FilePath)
{
	HINTERNET hInternet, hConnect, hFTPFile = NULL;
	DWORD dwBytesReturn = 0;
	DWORD UploadDataSize = 0;
	BYTE *pUploadData = NULL;
	DWORD dwRet, bRet = 0;

	// 建立会话
	hInternet = InternetOpen("WinInet Ftp", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
	// 建立连接
	hConnect = InternetConnect(hInternet, szHostName, INTERNET_INVALID_PORT_NUMBER, szUserName, szPassword, 
		INTERNET_SERVICE_FTP, INTERNET_FLAG_PASSIVE, 0);
	// 打开FTP文件, 文件操作和本地操作相似
	hFTPFile = FtpOpenFile(hConnect, szUrlPath, GENERIC_WRITE, FTP_TRANSFER_TYPE_BINARY | INTERNET_FLAG_RELOAD, NULL);

	// 打开文件
	HANDLE hFile = CreateFile(FilePath, GENERIC_READ | GENERIC_WRITE,FILE_SHARE_READ | 
		FILE_SHARE_WRITE, NULL, OPEN_EXISTING,FILE_ATTRIBUTE_ARCHIVE, NULL);
	if (INVALID_HANDLE_VALUE == hFile)
		return FALSE;

	// 获取文件大小
	UploadDataSize = GetFileSize(hFile, NULL);
	// 读取文件数据
	pUploadData = new BYTE[UploadDataSize];
	ReadFile(hFile, pUploadData, UploadDataSize, &dwRet, NULL);
	UploadDataSize = dwRet;

	// 上传数据
	bRet = InternetWriteFile(hFTPFile, pUploadData, UploadDataSize, &dwBytesReturn);
	if (FALSE == bRet)
	{
		delete[]pUploadData;
		return FALSE;
	}
	delete[]pUploadData;
	return TRUE;
}

int main(int argc,char * argv[])
{
	// FTP主机地址 用户名 密码 上传到目标FTP目录 上传的本地文件
	BOOL bRET = FTP_Upload("192.168.1.10", "lyshark", "123321", "/abc.exe","c://nc.exe");
	printf("%d \n", bRET);

	system("pause");
	return 0;
}