Visual FoxPro

Get an FTP Listing Entry's Last-Modified Time

Demonstrates the Chilkat Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a cached directory-listing entry as an RFC 822 date-time string. The only argument is a zero-based index.

Background: The last-modified time is the workhorse timestamp: it updates whenever a file's contents change and is what sync and mirror logic compares to decide whether a file needs re-transferring. It is the most reliably reported of the three across FTP servers, and the RFC 822 string carries a timezone so comparisons are well defined.

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LOCAL lnSuccess
LOCAL loFtp
LOCAL n
LOCAL i
LOCAL lcName
LOCAL lcLastModified

lnSuccess = 0

*  Demonstrates the Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a
*  cached directory-listing entry as an RFC 822 date-time string.  The only argument is a
*  zero-based index.

loFtp = CreateObject('Chilkat.Ftp2')

loFtp.Hostname = "ftp.example.com"
loFtp.Username = "myFtpLogin"

*  Normally you would not hard-code the password in source.  You should instead obtain it
*  from an interactive prompt, environment variable, or a secrets vault.
loFtp.Password = "myPassword"

lnSuccess = loFtp.Connect()
IF (lnSuccess = 0) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

lnSuccess = loFtp.ChangeRemoteDir("public_html")
IF (lnSuccess = 0) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

*  GetDirCount retrieves the directory listing on the first call and returns the number of
*  entries.  A negative return indicates failure.
n = loFtp.GetDirCount()
IF (n < 0) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

FOR i = 0 TO n - 1
    lcName = loFtp.GetFilename(i)

    *  The value is an RFC 822 string such as "Fri, 21 Nov 1997 09:55:06 -0600".
    lcLastModified = loFtp.GetLastModifiedTimeStr(i)
    ? lcName + "  modified " + lcLastModified
NEXT

lnSuccess = loFtp.Disconnect()
IF (lnSuccess = 0) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

RELEASE loFtp