Get Size of Download using HTTP HEAD

Get the size of a download using an HTTP HEAD request.

Download Chilkat Ruby Library

require 'chilkat'

http = Chilkat::CkHttp.new()

#  Any string unlocks the component for the 1st 30-days.
success = http.UnlockComponent("Anything for 30-day trial.")
if (success != true)
    print http.lastErrorText() + "\n"
    exit
end

resp = http.GetHead("http://www.chilkatsoft.com/download/ChilkatDotNet2.msi")
if (resp == nil )
    print http.lastErrorText() + "\n"
else

    sizeStr = resp.getHeaderField("Content-Length")
    if (sizeStr == nil )
        print "No content-length header field" + "\n"
    else
        #  Show the size of the file.
        #  You may convert the size string to an integer...
        print sizeStr + "\n"
    end

end