Ruby

Get a Remote FTP File's Size by Name as a String

Demonstrates the Chilkat Ftp2.GetSizeStrByName method, which returns the size in bytes of a named file in the current remote directory as a decimal string. The only argument is the filename.

Background: Returning the size as text avoids integer-width limits entirely, so this is the safe choice for a file of any size and for languages without a convenient large-integer type. Like the other by-name lookups it takes a bare filename in the current directory; parse the string when you need arithmetic, or use it directly for display.

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Ruby

require 'chilkat'

success = false

#  Demonstrates the Ftp2.GetSizeStrByName method, which returns the size in bytes of a named file
#  in the current remote directory as a decimal string.  The only argument is the filename.

ftp = Chilkat::CkFtp2.new()

ftp.put_Hostname("ftp.example.com")
ftp.put_Username("myFtpLogin")

#  Normally you would not hard-code the password in source.  You should instead obtain it
#  from an interactive prompt, environment variable, or a secrets vault.
ftp.put_Password("myPassword")

success = ftp.Connect()
if (success == false)
    print ftp.lastErrorText() + "\n";
    exit
end

success = ftp.ChangeRemoteDir("public_html")
if (success == false)
    print ftp.lastErrorText() + "\n";
    exit
end

#  The string form avoids integer-size limits, so it is safe for files of any size.
fileSize = ftp.getSizeStrByName("bigfile.zip")
if (ftp.get_LastMethodSuccess() == false)
    print ftp.lastErrorText() + "\n";
    exit
end

print "bigfile.zip is " + fileSize + " bytes" + "\n";

success = ftp.Disconnect()
if (success == false)
    print ftp.lastErrorText() + "\n";
    exit
end