关于FtpCommand

Question

BOOL bRet = FtpCommand(hConnection, // WinInet Connection handle
                           FALSE,        // 为什么为TRUE时，返回值为FALSE？
                           FTP_TRANSFER_TYPE_BINARY, // I'm receiving ASCII
                           _T("REST 100"),      // This is the FTP command I am passing
                           1,           // No context needed
                           &hResponse); // The handle to read the response 如何得到服务器的返回码?

Answer 1

推荐你用SOCKET向服务器发送命令,然后接受返回信息

Answer 2

发送FTP命令到服务器，FTP服务器会返回相关信息。查看FTP协议命令，用socket直接收发

Answer 3

phFtpCommand
[out] Pointer to an HINTERNET handle that will be created if a valid data socket is opened. The fExpectResponse parameter must be set to TRUE for phFtpCommand to be filled.

Answer 4

function FtpCommandDirList(hFtpSession: HINTERNET): String;
var
  data_handle: HINTERNET;
  bytes_read: DWORD;
  text_buffer: PChar;
  buffer_size: DWORD;
begin
  result := '';
  data_handle := NIL;
  if not FtpCommand(m_hFtpSession,true,FTP_TRANSFER_TYPE_ASCII,
    PChar('NLST'),0,@data_handle) then
  begin
    SetErrorCode(GetLastError());
    Application.MessageBox(PChar(SysErrorMessage(GetLastError())),'');
    exit;
  end;
  // Read the data.
  buffer_size := 1000;    // Arbitrary value.
  GetMem(text_buffer,buffer_size);
  bytes_read := 1;
  while bytes_read > 0 do
  begin
    InternetReadFile(data_handle,text_buffer,buffer_size, bytes_read);
    result := result + System.Copy(text_buffer,0,bytes_read);
  end;
  InternetCloseHandle(data_handle);
  FreeMem(text_buffer,buffer_size);
end;

Answer 5

to:zfive5(醉马不肖 之 [孤舟蓑笠翁， 独钓寒江雪]) 
BOOL bRet = FtpCommand(hConnection, // WinInet Connection handle
                           FALSE,        // 为什么为TRUE时，返回值为FALSE？
                           FTP_TRANSFER_TYPE_BINARY, // I'm receiving ASCII
                           _T("REST 100"),      // This is the FTP command I am passing
                           1,           // No context needed
                           &hResponse); // The handle to read the response 
为什么为TRUE时，返回值为FALSE？