Classic ASP
Delete Local Files that Do Not Exist on the FTP Server

Demonstrates how to get a list of local files in a directory tree that do not exist on the FTP server.
Chilkat Classic ASP Downloads

Classic ASP
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<%
success = 0

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

set ftp = Server.CreateObject("Chilkat.Ftp2")

ftp.Hostname = "ftp.example.com"
ftp.Username = "login"
ftp.Password = "password"

ftp.KeepSessionLog = 1

'  Connect and login to the FTP server.
success = ftp.Connect()
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ftp.LastErrorText) & "</pre>"
    Response.End
End If

'  Set the current remote directory to the root of
'  the remote tree to be compared.
success = ftp.ChangeRemoteDir("abc123")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ftp.LastErrorText) & "</pre>"
    Response.End
End If

'  Recursively descend the local directory tree
'  and find the files that exist locally but not remotely.
'  These are the files what would be uploaded via
'  the SyncRemoteTree method call with mode = 1.
'  (Mode 1 would upload all files that do not exist on the FTP server.)

'  The actual uploading is avoided by setting the preview-only argument to 1.
mode = 1
descendTree = 1
previewOnly = 1
success = ftp.SyncRemoteTree2("/temp/abc123",mode,descendTree,previewOnly)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ftp.LastErrorText) & "</pre>"
    Response.End
End If

'  The files what would've been uploaded are now available in the SyncPreview property,
'  which contains a list of local file paths, one per line.
'  A program can iterate over them like this:
set sa = Server.CreateObject("Chilkat.StringArray")
sa.LoadFromText ftp.SyncPreview

set fac = Server.CreateObject("Chilkat.FileAccess")

numFiles = sa.Count
i = 0

Do While (i < numFiles)
    localFilePath = sa.GetString(i)
    Response.Write "<pre>" & Server.HTMLEncode( localFilePath) & "</pre>"

    '  An application can delete the file using Chilkat's file access object,
    '  or it can choose to use the native file API available in the programming language:
    success = fac.FileDelete(localFilePath)
    If (success <> 1) Then
        Response.Write "<pre>" & Server.HTMLEncode( "Failed to delete: " & localFilePath) & "</pre>"
    End If

    i = i + 1
Loop

success = ftp.Disconnect()

%>
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