A simple ruby HTTP server that listens on 127.0.0.1:80 and redirects all requests to a specific URL.

simple_redirect_server.rb

#! /usr/bin/env ruby

require 'webrick'
require 'uri'


TARGET_URL = URI.parse "http://tommaso.pavese.me/back_to_work/"

redirect_callback = Proc.new do |request, response|
  response.set_redirect WEBrick::HTTPStatus::TemporaryRedirect, TARGET_URL
end

# signal handling
trap("INT") { @server.shutdown }
trap("TERM") { @server.shutdown }

begin
  @server = WEBrick::HTTPServer.new :Port => 80, :RequestCallback => redirect_callback
  Process.daemon # comment this line if managed by launchd
  @server.start
rescue Errno::EACCES
  puts "Can't bind to port 80 without sudo"
rescue StandardError
  # do nothing, then exit
ensure
  @server.shutdown if @server
end