DataFlex

File Existence Check

See more FTP Examples

Testing to see if a file exists on the FTP server. The GetSizeByName method is a convenient way to check if a file exists. It will return -1 if the file does not exist, otherwise it returns the size of the file in bytes. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoFtp
    Integer iFileSize
    String sTemp1

    Move False To iSuccess

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    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 "username"
    Set ComPassword Of hoFtp To "password"

    // Connect and login to the FTP server.
    Get ComConnect Of hoFtp To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Set the current remote directory to where the file is located:
    Get ComChangeRemoteDir Of hoFtp "something" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Test to see if the file exists by getting the file size by name. 
    // If a -1 is returned, the file does not exist.
    Get ComGetSizeByName Of hoFtp "test123.txt" To iFileSize
    If (iFileSize < 0) Begin
        Showln "file does not exist"
    End
    Else Begin
        Showln "file exists and is " iFileSize " bytes in size"
    End

    Get ComDisconnect Of hoFtp To iSuccess


End_Procedure