Really basic script for downloading a file from the web and saving it to a specified location.

file_downloader.rb

#ruby script to download a file from the command line given a url
#
#works with two arguments: 
#argument 1 is the path to the file, you can leave
#the http on or remove it, the script handles both
#
#second argument is the name of the file as you want it to be saved on disk
#i.e. download.zip
#
#KNOWN BUG: will not work given an IP instead of a url
require 'net/http'

#pull the file url from the first argument
full_url = ARGV[0]

#split file path on / characters and check to see if http:// was entered
url_array = full_url.split('/')
if url_array[0].eql? "http:" 
	domain = url_array[2]
	start_count = 3
else 
	domain = url_array[0]
	start_count = 1
end

#now that we have the domain, rebuild the path to the file
path = ""
start_count.upto(url_array.length() -1) do |x|
	path << '/'
	path << url_array[x]
end

#now that we have the domain and path to the file, download and save
Net::HTTP.start(domain) do |http|
	resp = http.get(path)
	open(ARGV[1], "wb") do |file|
		file.write(resp.body)
	end
end
puts "File Download Complete"