(Lianja) 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.

Chilkat Lianja Extension Download Chilkat Lianja Extension

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

loFtp = createobject("CkFtp2")

loFtp.Hostname = "ftp.example.com"
loFtp.Username = "username"
loFtp.Password = "password"

// Connect and login to the FTP server.
llSuccess = loFtp.Connect()
if (llSuccess <> .T.) then
    ? loFtp.LastErrorText
    release loFtp
    return
endif

// Set the current remote directory to where the file is located:
llSuccess = loFtp.ChangeRemoteDir("something")
if (llSuccess <> .T.) then
    ? loFtp.LastErrorText
    release loFtp
    return
endif

// Test to see if the file exists by getting the file size by name. 
// If a -1 is returned, the file does not exist.
lnFileSize = loFtp.GetSizeByName("test123.txt")
if (lnFileSize < 0) then
    ? "file does not exist"
else
    ? "file exists and is " + str(lnFileSize) + " bytes in size"
endif

llSuccess = loFtp.Disconnect()


release loFtp