blur_streetview_proxy.rb

#!/usr/bin/env ruby
# Based on https://gist.github.com/165171

require 'ubygems'
require 'rmagick'
require 'webrick'
require 'webrick/httpproxy'

handler = Proc.new do |req, res|
  if req.host =~ /^cbk\d+\.google/ and res['content-type'] =~ /jpeg/
    res.body = Magick::Image.from_blob(res.body).shift.blur_image(50, 30).to_blob
    res['cache-control'] = 'no-cache'
  end
end

s = WEBrick::HTTPProxyServer.new(
  :BindAddress => '0.0.0.0',
  :Port => 8080,
  :ProxyContentHandler => handler
  )

Signal.trap('INT') do
  s.shutdown
end

s.start