protobuf-decoding server

proxy.rb

#!/usr/bin/env ruby

# Requires `protoc` to be installed and available on PATH.
# See https://developers.google.com/protocol-buffers/

require 'bundler/inline'
require 'open3'

gemfile do
  gem 'puma'
end

class Decoder
  def call(env)
    result, status = Open3.capture2('protoc', '--decode_raw', stdin_data: env['rack.input'])
    puts result if status.success?

    [201, {}, ['']]
  end
end

server = Puma::Server.new(Decoder.new, Puma::Events.new(STDOUT, STDERR))
server.add_tcp_listener('127.0.0.1', 9000)
server.run.join