DataFlex

Limit FTP DownloadTree by Modification Date

Demonstrates the Chilkat Ftp2.SetOldestDateStr method, which sets the oldest remote modification time eligible for DownloadTree. The only argument is an RFC 822 date-time string; files older than it are skipped. It is a void method.

Background: This is a date filter for the recursive download: set a cutoff and DownloadTree pulls only files modified on or after it, ignoring everything older. It is ideal for fetching just recent activity — new logs, today's uploads — from a directory that also holds a large archive you do not want to re-download. The RFC 822 string carries a timezone so the cutoff is unambiguous.

Chilkat DataFlex Downloads

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DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoFtp
    String sTemp1

    Move False To iSuccess

    //  Demonstrates the Ftp2.SetOldestDateStr method, which sets the oldest remote modification time
    //  eligible for DownloadTree.  The only argument is an RFC 822 date-time string.  It is a void
    //  method.

    Get Create (RefClass(cComChilkatFtp2)) To hoFtp
    If (Not(IsComObjectCreated(hoFtp))) Begin
        Send CreateComObject of hoFtp
    End

    Set ComHostname Of hoFtp To "ftp.example.com"
    Set ComUsername Of hoFtp To "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.
    Set ComPassword Of hoFtp To "myPassword"

    Get ComConnect Of hoFtp To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComChangeRemoteDir Of hoFtp "public_html" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Only files modified on or after this date will be considered by DownloadTree.  Files older
    //  than this are skipped.
    Send ComSetOldestDateStr To hoFtp "Wed, 01 Jul 2026 00:00:00 -0000"

    //  Download only the recently-modified files in the remote tree.
    Get ComDownloadTree Of hoFtp "qa_output/recent" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Downloaded recently modified files."

    Get ComDisconnect Of hoFtp To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End



End_Procedure