Simple HTTP proxy for strangely formatted localhost requests, as used by certain native mobile apps.

proxy.rb

# Incredibly simple HTTP proxy that takes `GET` requests of the form
#
#     http://127.0.0.1:12345/www.domain.com/path/to/resource
#
# and proxies to
#
#     http://www.domain.com/path/to/resource
#
# All body content and headers are passed through untouched.
#
# Run using `shotgun` and choose your port: `$ shotgun -p 12345 proxy.rb`

require 'rubygems'
require 'sinatra'
require 'net/https'
require 'uri'

get '/*' do |path|
  uri = URI.parse("http://#{params[:splat]}")
  res = Net::HTTP.get_response(uri)
  status res.code
  res.each_header { |k,v| headers k => v }
  body res.body
end