Prag Prog Mag downloader

praprogmag.rb

require 'open-uri'

def startup()
	unless File.exist?('metadata.dat')
		fd = open('metadata.dat', "w")
		fd.write("0")
		fd.close()
	end
	
	fd = open('metadata.dat', "r")
	last_issue = fd.read()
	fd.close()
	return last_issue
end

def downloadAll(extension)
	url = 'http://pragprog.com/magazines/download/'
	last_downloaded = 18
	latest_issue = 18
	(last_downloaded..latest_issue).each do |issue|
		issue_url = "#{url}#{issue}.#{extension}"
		puts "Downloading from #{issue_url}"
		fr = open(issue_url)
		content = fr.read()
		fr.close()
		fw = File.open("issue_#{issue}.#{extension}", "w")
		fw.write(content)
		fw.close()
		puts "Done!"
	end
end

desired_extensions = ['pdf', 'mobi']

desired_extensions.each do |ext|
	downloadAll(ext)
end