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#!/usr/bin/env ruby

# Rewrites and proxies requests to a third-party API, with HTTP basic authentication.

require 'goliath'

require 'em-synchrony/em-http'

class TwilioResponse < Goliath::API

use Goliath::Rack::Params

use Goliath::Rack::JSONP

HEADERS = { authorization: ENV.values_at("TWILIO_SID","TWILIO_AUTH_TOKEN") }

BASE_URL = "https://api.twilio.com/2010-04-01/Accounts/#{ENV['TWILIO_SID']}/AvailablePhoneNumbers/US"

def response(env)

url = "#{BASE_URL}#{env['REQUEST_PATH']}?#{env['QUERY_STRING']}"

logger.debug "Proxying #{url}"

http = EM::HttpRequest.new(url).get head: HEADERS

logger.debug "Received #{http.response_header.status} from Twilio"

[200, {'X-Goliath' => 'Proxy','Content-Type' => 'application/javascript'}, http.response]

end

end

class Twilio < Goliath::API

get %r{^/(Local|TollFree)}, TwilioResponse

end