Class: AlexaRuby::Validator

Inherits:
Object
  • Object
show all
Defined in:
lib/alexa_ruby/request/base_request/validator.rb

Overview

Validator is responsible for Amazon request validation:

- SignatureCertChainUrl validation
- Amazon Alexa request signature validation

Constant Summary collapse

TIMESTAMP_TOLERANCE = 
150

Instance Method Summary collapse

Constructor Details

#initialize(cert_chain_url, signature, request, timestamp_diff = nil) ⇒ Validator

Setup new validator

Parameters:

  • cert_chain_url (String) —

    SSL certificates chain URI

  • signature (String) —

    HTTP request signature

  • request (Object) —

    json request

  • timestamp_diff (Integer) (defaults to: nil) —

    valid distance in seconds between current time and the request timestamp



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# File 'lib/alexa_ruby/request/base_request/validator.rb', line 17

def initialize(cert_chain_url, signature, request, timestamp_diff = nil)
  @chain_url = cert_chain_url
  @signature = signature
  @request = request
  @timestamp_diff = timestamp_diff || TIMESTAMP_TOLERANCE
end

Instance Method Details

#valid_request? ⇒ Boolean

Check if it is a valid Amazon request

Returns:

  • (Boolean) 


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# File 'lib/alexa_ruby/request/base_request/validator.rb', line 27

def valid_request?
  unless timestamp_tolerant?
    raise ArgumentError,
          'Outdated request: request timestamp is more than ' \
          "#{@timestamp_diff} seconds later than current time"
  end
  valid_uri? && valid_certificates?
end