Class: PayWithAmazon::IpnHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/pay_with_amazon/ipn_handler.rb

Overview

Pay with Amazon Ipn Handler

This class authenticates an sns message sent from Amazon. It will validate the header, subject, and certificate. After validation there are many helper methods in place to extract information received from the ipn notification.

Constant Summary collapse

SIGNABLE_KEYS = 
[
  'Message',
  'MessageId',
  'Timestamp',
  'TopicArn',
  'Type',
].freeze
COMMON_NAME = 
'sns.amazonaws.com'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(headers, body, proxy_addr: :ENV, proxy_port: nil, proxy_user: nil, proxy_pass: nil) ⇒ IpnHandler

Returns a new instance of IpnHandler.

Parameters:



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 40

def initialize(
        headers,
        body,
        proxy_addr: :ENV,
        proxy_port: nil,
        proxy_user: nil,
        proxy_pass: nil)

  @body = body
  @raw = parse_from(@body)
  @headers = headers
  @proxy_addr = proxy_addr
  @proxy_port = proxy_port
  @proxy_user = proxy_user
  @proxy_pass = proxy_pass
end

Instance Attribute Details

#body ⇒ Object (readonly)

Returns the value of attribute body.



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 31

def body
  @body
end

#headers ⇒ Object (readonly)

Returns the value of attribute headers.



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 31

def headers
  @headers
end

#proxy_addr ⇒ Object

Returns the value of attribute proxy_addr.



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 32

def proxy_addr
  @proxy_addr
end

#proxy_pass ⇒ Object

Returns the value of attribute proxy_pass.



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 32

def proxy_pass
  @proxy_pass
end

#proxy_port ⇒ Object

Returns the value of attribute proxy_port.



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 32

def proxy_port
  @proxy_port
end

#proxy_user ⇒ Object

Returns the value of attribute proxy_user.



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 32

def proxy_user
  @proxy_user
end

Instance Method Details

#authentic? ⇒ Boolean

This method will authenticate the ipn message sent from Amazon. It will return true if everything is verified. It will raise an error message if verification fails.

Returns:

  • (Boolean) 


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# File 'lib/pay_with_amazon/ipn_handler.rb', line 60

def authentic?
  begin
    decoded_from_base64 = Base64.decode64(signature)
    validate_header
    validate_subject(get_certificate.subject)
    public_key = get_public_key_from(get_certificate)
    verify_public_key(public_key, decoded_from_base64, canonical_string)

    return true
  rescue IpnWasNotAuthenticError => e
    raise e.message
  end
end

#environment ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 118

def environment
  parse_from(@raw['Message'])["ReleaseEnvironment"]
end

#message ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 86

def message
  @raw['Message']
end

#message_id ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 78

def message_id
  @raw['MessageId']
end

#message_timestamp ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 130

def message_timestamp
  parse_from(@raw['Message'])["Timestamp"]
end

#notification_data ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 126

def notification_data
  parse_from(@raw['Message'])["NotificationData"]
end

#notification_type ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 110

def notification_type
  parse_from(@raw['Message'])["NotificationType"]
end

#parse_from(json) ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 134

def parse_from(json)
  JSON.parse(json)
end

#seller_id ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 114

def seller_id
  parse_from(@raw['Message'])["SellerId"]
end

#signature ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 94

def signature
  @raw['Signature']
end

#signature_version ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 98

def signature_version
  @raw['SignatureVersion']
end

#signing_cert_url ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 102

def signing_cert_url
  @raw['SigningCertURL']
end

#timestamp ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 90

def timestamp
  @raw['Timestamp']
end

#topic_arn ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 82

def topic_arn
  @raw['TopicArn']
end

#type ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 74

def type
  @raw['Type']
end

#unsubscribe_url ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 106

def unsubscribe_url
  @raw['UnsubscribeURL']
end

#version ⇒ Object 



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# File 'lib/pay_with_amazon/ipn_handler.rb', line 122

def version
  parse_from(@raw['Message'])["Version"]
end