PowerBuilder
PowerBuilder
Get an FTP Listing Entry's Last-Modified Time
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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.
Chilkat PowerBuilder Downloads
integer li_rc
integer li_Success
oleobject loo_Ftp
integer n
integer i
string ls_Name
string ls_LastModified
li_Success = 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.
loo_Ftp = create oleobject
li_rc = loo_Ftp.ConnectToNewObject("Chilkat.Ftp2")
if li_rc < 0 then
destroy loo_Ftp
MessageBox("Error","Connecting to COM object failed")
return
end if
loo_Ftp.Hostname = "ftp.example.com"
loo_Ftp.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.
loo_Ftp.Password = "myPassword"
li_Success = loo_Ftp.Connect()
if li_Success = 0 then
Write-Debug loo_Ftp.LastErrorText
destroy loo_Ftp
return
end if
li_Success = loo_Ftp.ChangeRemoteDir("public_html")
if li_Success = 0 then
Write-Debug loo_Ftp.LastErrorText
destroy loo_Ftp
return
end if
// GetDirCount retrieves the directory listing on the first call and returns the number of
// entries. A negative return indicates failure.
n = loo_Ftp.GetDirCount()
if n < 0 then
Write-Debug loo_Ftp.LastErrorText
destroy loo_Ftp
return
end if
for i = 0 to n - 1
ls_Name = loo_Ftp.GetFilename(i)
// The value is an RFC 822 string such as "Fri, 21 Nov 1997 09:55:06 -0600".
ls_LastModified = loo_Ftp.GetLastModifiedTimeStr(i)
Write-Debug ls_Name + " modified " + ls_LastModified
next
li_Success = loo_Ftp.Disconnect()
if li_Success = 0 then
Write-Debug loo_Ftp.LastErrorText
destroy loo_Ftp
return
end if
destroy loo_Ftp