Xbase++

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 nSuccess
LOCAL oFtp
LOCAL n
LOCAL i
LOCAL cName
LOCAL cLastModified

nSuccess := 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.

oFtp := CreateObject("Chilkat.Ftp2")

oFtp:Hostname := "ftp.example.com"
oFtp: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.
oFtp:Password := "myPassword"

nSuccess := oFtp:Connect()
IF (nSuccess == 0)
    ? oFtp:LastErrorText
    oFtp:destroy()
    RETURN
ENDIF

nSuccess := oFtp:ChangeRemoteDir("public_html")
IF (nSuccess == 0)
    ? oFtp:LastErrorText
    oFtp:destroy()
    RETURN
ENDIF

//  GetDirCount retrieves the directory listing on the first call and returns the number of
//  entries.  A negative return indicates failure.
n := oFtp:GetDirCount()
IF (n < 0)
    ? oFtp:LastErrorText
    oFtp:destroy()
    RETURN
ENDIF

FOR i := 0 TO n - 1
    cName := oFtp:GetFilename(i)

    //  The value is an RFC 822 string such as "Fri, 21 Nov 1997 09:55:06 -0600".
    cLastModified := oFtp:GetLastModifiedTimeStr(i)
    ? cName + "  modified " + cLastModified
NEXT

nSuccess := oFtp:Disconnect()
IF (nSuccess == 0)
    ? oFtp:LastErrorText
    oFtp:destroy()
    RETURN
ENDIF

oFtp:destroy()