Module: TShield::Grpc::VCR

Included in:
RequestHandler
Defined in:
lib/tshield/grpc/vcr.rb

Overview

Grpc vcr module

Defined Under Namespace

Classes: FilePath

Instance Method Summary collapse

Instance Method Details

#complete_path(module_name, method_name) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 116

def complete_path(module_name, method_name)
  @session_name = (@session || {})[:name]
  module_name = @configuration.windows_compatibility? ? encode_colon(module_name) : module_name
  ['requests', @session_name, module_name, method_name.to_s, @digest].compact
end

#create_destiny(module_name, method_name) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 122

def create_destiny(module_name, method_name)
  current_path = []

  path = complete_path(module_name, method_name)
  TShield.logger.info("using path #{path}")
  path.each do |inner_path|
    current_path << inner_path
    destiny = File.join current_path
    Dir.mkdir destiny unless File.exist? destiny
  end
  path
end

#encode_colon(value) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 70

def encode_colon(value)
  value.gsub(':', '%3a')
end

#handler_in_vcr_mode(method_name, request, parameters, options) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 24

def handler_in_vcr_mode(method_name, request, parameters, options)
  parameters.peer =~ /ipv6:\[(.+?)\]|ipv4:(.+?):/
  peer = Regexp.last_match(1) || Regexp.last_match(2)

  TShield.logger.info("request from #{parameters.peer}")
  @session = TShield::Sessions.current(peer)
  @digest = hexdigest(request)
  counter = @session ? request_count.current(@digest) : 0

  TShield.logger.info("grpc using session #{@session || 'default'}")
  module_name = options['module']

  path = create_destiny(module_name, method_name)
  @file_path = FilePath.new(path, counter)
  save_request(request)
  response = {}
  saved_error
  begin
    response = saved_response
    if response
      TShield.logger.info("returning saved response for request #{request.to_json} saved into #{@digest}")
      request_count.add(@digest) if @session
      return response
    end

    response = send_request(request, module_name, options, method_name)
    save_response(response)
  rescue GRPC::BadStatus => e
    save_error({ code: e.code, details: e.details })
    raise e
  end
  request_count.add(@digest) if @session
  response
end

#hexdigest(request) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 135

def hexdigest(request)
  Digest::SHA1.hexdigest request.to_json
end

#initialize ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 20

def initialize
  @configuration = TShield::Configuration.singleton
end

#request_count ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 66

def request_count
  @session[:grpc_counter]
end

#save_error(error) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 99

def save_error(error)
  file = File.open(File.join(@file_path.path, "#{@file_path.count}.error"), 'w')
  file.puts error.to_json
  file.close
  request_count.add(@digest) if @session
end

#save_request(request) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 93

def save_request(request)
  file = File.open(File.join(@file_path.path, "#{@file_path.count}.original_request"), 'w')
  file.puts request.to_json
  file.close
end

#save_response(response) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 106

def save_response(response)
  file = File.open(File.join(@file_path.path, "#{@file_path.count}.response"), 'w')
  file.puts response.to_json
  file.close

  response_class = File.open(File.join(@file_path.path, "#{@file_path.count}.response_class"), 'w')
  response_class.puts response.class.to_s
  response_class.close
end

#saved_error ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 83

def saved_error
  error_file = File.join(@file_path.path, "#{@file_path.count}.error")
  return false unless File.exist? error_file

  request_count.add(@digest) if @session
  content = JSON.parse File.open(error_file).read
  grpc_error = GRPC::BadStatus.new(content['code'], content['details'])
  raise grpc_error
end

#saved_response ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 74

def saved_response
  response_file = File.join(@file_path.path, "#{@file_path.count}.response")
  return false unless File.exist? response_file

  content = JSON.parse File.open(response_file).read
  response_class = File.open(File.join(@file_path.path, "#{@file_path.count}.response_class")).read.strip
  Kernel.const_get(response_class).new(content)
end

#send_request(request, module_name, options, method_name) ⇒ Object 



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# File 'lib/tshield/grpc/vcr.rb', line 59

def send_request(request, module_name, options, method_name)
  TShield.logger.info("calling server to get response for #{request.to_json}")
  client_class = Object.const_get("#{module_name}::Stub")
  client_instance = client_class.new(options['hostname'], :this_channel_is_insecure)
  client_instance.send(method_name, request)
end