Class: CybersourceryTesting::TranslatingProxy

Inherits:
Rack::TranslatingProxy
  • Object
show all
Defined in:
lib/cybersourcery_testing/translating_proxy.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ TranslatingProxy

Returns a new instance of TranslatingProxy.



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 7

def initialize(app)
  @app = app
end

Instance Method Details

#_response_mapping ⇒ Object

override parent - we need this refreshed with each request, since the test server port changes



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 93

def _response_mapping
  request_mapping.invert
end

#call(env) ⇒ Object 



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 11

def call(env)
  if proxy?(env)
    request = Rack::Request.new(env)
    set_referrer(request)
    check_for_cryptic_cybersource_errors(request)
    maybe_use_vcr(env)
  else
    @app.call(env)
  end
end

#check_for_cryptic_cybersource_errors(request) ⇒ Object 



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 37

def check_for_cryptic_cybersource_errors(request)
  request.params.each do |k,v|
    if v.class != String
      raise "You are attempting to pass a value that is not a String to Cybersource. This will cause Cybersource to throw a generic server error. You passed: #{k}: #{v.to_s}"
    end

    if k == 'signed_field_names' && v.length >= 700
      raise "You are attempting to pass a signed_fields value to Cybersource that is 700 characters or greater. This will cause Cybersource to throw a generic server error. You passed: #{k}: #{v}"
    end
  end
end

#maybe_use_vcr(env) ⇒ Object 



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 49

def maybe_use_vcr(env)
  if ENV['CYBERSOURCERY_USE_VCR_IN_TESTS']
    VCR.use_cassette(
      'cybersourcery',
      record: :new_episodes,
      match_requests_on: CybersourceryTesting::Vcr.match_requests_on
    ) do
      super_call(env)
    end
  else
    super_call(env)
  end
end

#proxy?(env) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 22

def proxy?(env)
  # The browser keeps requesting favicon.ico, which throws errors when the request is forwarded
  # to the Cybersource server. So ony forward POST requests.
  env['REQUEST_METHOD'] == 'POST'
end

#request_mapping ⇒ Object 



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 67

def request_mapping
  mappings = {
    # our proxy                           the actual Cybersource test server
    #ENV['CYBERSOURCERY_SOP_PROXY_URL'] => ENV['CYBERSOURCERY_SOP_TEST_URL'],
  }

  if @referrer
    local_response_url = "#{@referrer.scheme}://#{@referrer.host}:#{@referrer.port}#{ENV['CYBERSOURCERY_LOCAL_RESPONSE_PAGE_PATH']}"

    #        local resp page       page where Cybersource redirects
    mappings[local_response_url] = ENV['CYBERSOURCERY_RESPONSE_PAGE_URL']
  end

  mappings
end

#rewrite_response_body(body) ⇒ Object

override parent



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 84

def rewrite_response_body(body)
  # to_s on an array gives a version that has brackets, escape characters, etc. I don't know why
  # it worked outside the middleware context (as I didn't have this problem with it before).
  #str = rewrite_string(body.to_s, _response_mapping)
  str = rewrite_string(body.first, _response_mapping)
  rewrite_string(str, _response_mapping, URI.method(:encode_www_form_component))
end

#set_referrer(request) ⇒ Object 



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 28

def set_referrer(request)
  # We are making @referrer an instance variable for convenience. We need it since the port of
  # the test server can change with every test run. Conceptually, http_referrer should be part
  # of env, but env is not an instance variable. We would have to rewrite multiple method
  # signatures and a bunch of calls in the parent translating_proxy.rb if we put the referrer in
  # env (we need it in request_mapping(), which is at the end of a chain of calls).
  @referrer = request.referrer ? URI(request.referrer) : nil
end

#super_call ⇒ Object 



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 5

alias :super_call :call

#target_host ⇒ Object 



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# File 'lib/cybersourcery_testing/translating_proxy.rb', line 63

def target_host
  ENV['CYBERSOURCERY_SOP_TEST_URL']
end