ftp自動更新相關API

 

1.InternetOpen Function
Initializes an application's use of the WinINet functions.
Syntax

HINTERNET InternetOpen(
  __in  LPCTSTR lpszAgent,
  __in  DWORD dwAccessType,
  __in  LPCTSTR lpszProxyName,
  __in  LPCTSTR lpszProxyBypass,
  __in  DWORD dwFlags
);

hSession = ::InternetOpen(_T("star"), PRE_CONFIG_INTERNET_ACCESS, _T(""),INTERNET_INVALID_PORT_NUMBER,0 );
if(hSession == NULL)
{
return -1;  
}
2.InternetConnectA  (WININET.@)
SYNOPSIS
HINTERNET InternetConnectA
(
  HINTERNET     hInternet,
  LPCSTR        lpszServerName,
  INTERNET_PORT nServerPort,
  LPCSTR        lpszUserName,
  LPCSTR        lpszPassword,
  DWORD         dwService,
  DWORD         dwFlags,
  DWORD_PTR     dwContext
)
DESCRIPTION
Open a ftp, gopher or http session.
RETURNS
HINTERNET a session handle on success NULL on failure
IMPLEMENTATION
Defined in "wininet.h".

hConnectFTP = ::InternetConnectA( hSession, sUrl.c_str(), INTERNET_DEFAULT_FTP_PORT, "sc", "sc123456", INTERNET_SERVICE_FTP, INTERNET_FLAG_PASSIVE, 0 );
if (hConnectFTP == NULL)
{
return -1;
}
3.
FtpOpenFileA  (WININET.@)
SYNOPSIS
HINTERNET FtpOpenFileA
(
  HINTERNET hFtpSession,
  LPCSTR    lpszFileName,
  DWORD     fdwAccess,
  DWORD     dwFlags,
  DWORD_PTR dwContext
)
DESCRIPTION
Open a remote file for writing or reading.
RETURNS
HINTERNET handle on success NULL on failure
IMPLEMENTATION
Defined in "wininet.h".
HINTERNET hOpenFile = ::FtpOpenFileA( hConnectFTP, (string("./") + sPath).c_str() , GENERIC_READ, FTP_TRANSFER_TYPE_ASCII, 0 ); //ServerUpdate4.ini   ./20081027/0_116_115517.dat
4.FtpGetFileSize Function
Retrieves the file size of the requested FTP resource.
Syntax

DWORD FtpGetFileSize(
  __in   HINTERNET hFile,
  __out  LPDWORD lpdwFileSizeHigh
);

Parameters
hFile [in]
Handle returned from a call to FtpOpenFile.
lpdwFileSizeHigh [out]
Pointer to the high-order unsigned long integer of the file size of the requested FTP resource.
Return Value
Returns the low-order unsigned long integer of the file size of the requested FTP resource.

DWORD filesize = FtpGetFileSize(hOpenFile , NULL) ;
5.CreateDirectory
This function creates a new directory. If the underlying file system supports security on files and directories, the function applies a specified security descriptor to the new directory.
　　A RAPI version of this function exists, and it is named CeCreateDirectory (RAPI).
　　BOOL CreateDirectory(
　　LPCTSTR lpPathName,
　　LPSECURITY_ATTRIBUTES lpSecurityAttributes
　　);
　　Parameters
　　lpPathName
　　[in] Long pointer to a null-terminated string that specifies the path of the directory to be created.
　　There is a default string size limit for paths of MAX_PATH characters. This limit is related to how the CreateDirectory function parses paths.
　　lpSecurityAttributes
　　[in] Ignored; set to NULL.
　　Return Values
　　Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError.
　　Remarks
　　Some file systems, such as NTFS file system, support compression or encryption for individual files and directories. On volumes formatted for such a file system, a new directory inherits the compression and encryption attributes of its parent directory.
　　Requirements
　　OS Versions: Windows CE 1.0 and later.
　　Header: Winbase.h.
　　Link Library: Coredll.lib.
　　See Also
　　CeCreateDirectory (RAPI) | CreateFile | RemoveDirectory

6.InternetCloseHandle