Classic ASP

File Existence Check

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.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
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 = "username"
ftp.Password = "password"

' 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 where the file is located:
success = ftp.ChangeRemoteDir("something")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ftp.LastErrorText) & "</pre>"
    Response.End
End If

' Test to see if the file exists by getting the file size by name. 
' If a -1 is returned, the file does not exist.
fileSize = ftp.GetSizeByName("test123.txt")
If (fileSize < 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( "file does not exist") & "</pre>"
Else
    Response.Write "<pre>" & Server.HTMLEncode( "file exists and is " & fileSize & " bytes in size") & "</pre>"
End If

success = ftp.Disconnect()

%>
</body>
</html>