(CkPython) 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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import sys
import chilkat

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

ftp = chilkat.CkFtp2()

ftp.put_Hostname("ftp.example.com")
ftp.put_Username("username")
ftp.put_Password("password")

# Connect and login to the FTP server.
success = ftp.Connect()
if (success != True):
    print(ftp.lastErrorText())
    sys.exit()

# Set the current remote directory to where the file is located:
success = ftp.ChangeRemoteDir("something")
if (success != True):
    print(ftp.lastErrorText())
    sys.exit()

# 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):
    print("file does not exist")
else:
    print("file exists and is " + str(fileSize) + " bytes in size")

success = ftp.Disconnect()