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FtpGetFile (Windows Embedded CE 6.0)

  • Artículo

1/6/2010

This function retrieves a file from the FTP server and stores it under the specified file name, creating a new local file in the process.

Syntax

BOOL WINAPI FtpGetFile(
  HINTERNET hConnect, 
  LPCTSTR lpszRemoteFile, 
  LPCTSTR lpszNewFile, 
  BOOL fFailIfExists, 
  DWORD dwFlagsAndAttributes, 
  DWORD dwFlags, 
  DWORD dwContext
);

Parameters

  • hConnect
    [in] Valid handle to an FTP session.
  • lpszRemoteFile
    [in] Long pointer to a null-terminated string that contains the file name to retrieve from the remote system.
  • lpszNewFile
    [in] Long pointer to a null-terminated string that contains the file name to create on the local system.
  • fFailIfExists
    [in] Boolean that specifies if the function should proceed if a local file of the specified name already exists. If fFailIfExists is TRUE and the local file exists, FtpGetFile fails.
  • dwFlagsAndAttributes
    [in] Specifies the file attributes for the new file. Can be a combination of the FILE_ATTRIBUTE_* flags used by the CreateFile function.

  • dwFlags
    [in] Specifies how the function will handle the file download. The first set of flag values indicates the conditions under which the transfer occurs. These transfer type flags can be used in combination with the second set of flags that control caching. The following table shows the transfer type values. The application can select one of these values.

    Value Description

    FTP_TRANSFER_TYPE_ASCII

    Transfers the file using FTP ASCII, Type A, transfer method. Control and formatting data is converted to local equivalents.

    FTP_TRANSFER_TYPE_BINARY

    Transfers the file using FTP Image, Type I, transfer method. The file is transferred exactly as it exists with no changes. This is the default transfer method.

    FTP_TRANSFER_TYPE_UNKNOWN

    Defaults to FTP_TRANSFER_TYPE_BINARY.

    INTERNET_FLAG_TRANSFER_ASCII

    Transfers the file as ASCII.

    INTERNET_FLAG_TRANSFER_BINARY

    Transfers the file as binary.

    The following table shows the flags that determine how file caching will occur. A combination of these flags can be used with the transfer type flags described in the previous table.

    Flag Description

    INTERNET_FLAG_DONT_CACHE

    Does not add the returned entity to the cache. Identical to the preferred value INTERNET_FLAG_NO_CACHE_WRITE.

    INTERNET_FLAG_HYPERLINK

    Forces a reload if there was no Expires time and no Last-Modified time returned by the server when determining whether to reload the item from the network.

    INTERNET_FLAG_MUST_CACHE_REQUEST

    Causes a temporary file to be created if the file cannot be cached. Identical to the preferred value INTERNET_FLAG_NEED_FILE.

    INTERNET_FLAG_NEED_FILE

    Causes a temporary file to be created if the file cannot be cached.

    INTERNET_FLAG_NO_CACHE_WRITE

    Does not add the returned entity to the cache. If the INTERNET_FLAG_HYPERLINK is also specified, WinInet will create the cache file but will not commit it.

    INTERNET_FLAG_RELOAD

    Forces a download of the requested file, object, or directory listing from the origin server, not from the cache.

    INTERNET_FLAG_RESYNCHRONIZE

    Causes the FTP resource to be reloaded from the server.
  • dwContext
    [in] Specifies an application-defined value that associates this search with application data. This is used only if the application has already called InternetSetStatusCallback to set up a status callback function. All status requests are handled synchronously.

Return Value

TRUE indicates success. FALSE indicates failure. To get extended error data, call GetLastError.

Remarks

This function is a high-level routine that handles all the bookkeeping and overhead associated with reading a file from an FTP server and storing it locally. An application that needs to retrieve file data only or that requires close control over the file transfer should use the FtpOpenFile and InternetReadFile functions.

If the dwTransferType parameter specifies FILE_TRANSFER_TYPE_ASCII, translation of the file data converts control and formatting characters to local equivalents. The default transfer is binary mode, where the file is downloaded in the same format as it is stored on the server.

Both lpszRemoteFile and lpszNewFile can be either partially or fully qualified file names relative to the current directory. A backward slash (\) or forward slash (/) can be used as the directory separator for either name. FtpGetFile translates the directory name separators to the appropriate character before they are used.

Requirements

Header wininet.h
Library wininet.lib
Windows Embedded CE Windows CE 2.0 and later

See Also

Reference

WinInet Functions
FtpOpenFile
InternetReadFile
InternetSetStatusCallback

Other Resources

CreateFile