C/C++ 实现通过FTP上传下载

原创

LyShark 2022-05-29 00:01:23 ©著作权

文章标签 #include #pragma 上传 文章分类 C/C++ 后端开发

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实现FTP文件下载:

#include 
#include 
#include 
#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 
#include 
#include 
#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;
}