Ruby

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. Ruby

require 'chilkat'

success = false

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

ftp = Chilkat::CkFtp2.new()

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() + "\n";
    exit
end

# Set the current remote directory to where the file is located:
success = ftp.ChangeRemoteDir("something")
if (success != true)
    print ftp.lastErrorText() + "\n";
    exit
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.
fileSize = ftp.GetSizeByName("test123.txt")
if (fileSize < 0)
    print "file does not exist" + "\n";
else
    print "file exists and is " + fileSize.to_s() + " bytes in size" + "\n";
end

success = ftp.Disconnect()