This ruby script fetches all articles from an issue of the excellent objc.io periodical and send them to Instapaper. This script should be automated so it runs automatically when a new issue is available. Perhaps parsing the RSS?

objcio2instapaper.rb

#!/usr/local/bin/ruby
# fetches the content of an objc.io issue and send it to Instapaper
# Stephan Burlot, Coriolis Technologies, http://www.coriolis.ch
# First version Oct 10, 2013

# ruby was installed via homebrew, so the path to ruby is /usr/local/bin
# you may need to change it to the actual path of your ruby installation.

require 'nokogiri'
require 'open-uri'
require 'openssl'

# this is the issue number
issue = 5

# set these to your username and your password
user = "username"
password = "password"

# fetch the editorial page
doc = Nokogiri::HTML(open('http://www.objc.io/issue-' + issue.to_s + '/editorial.html'))

# look for the content's urls
doc.xpath('//div[@class="issue-cross-links"]').each do | section |
  begin
		section.xpath('.//a[@href]').each do | link |
			puts "Found article: " + link.content.to_s + " (" + link['href'].to_s + ")"
			
			# set a custom title for the article
			title = 'objc.io #' + issue.to_s + ' - ' + link.content.to_s
			url = 'https://www.instapaper.com/api/add?title' + title + \
																	"&url=http://objc.io" + link['href'].to_s
			#puts "url : " + url
			begin
				instapaper = open(URI::encode(url), {
													:http_basic_authentication=>[user, password],
													:ssl_verify_mode => OpenSSL::SSL::VERIFY_NONE})

				# catch errors
				rescue OpenURI::HTTPError => status_code
					the_status = status_code.io.status[0]
					# status_code.message is the numeric code and text in a string
					puts "Instapaper returned a bad status code: #{status_code.message}"
					exit
			end
	end
	rescue NoMethodError
			puts "issue-cross-links not found"
			exit
	end
end

puts "End"