Module: FacebookSession

Defined in:
lib/facebook_session.rb,
lib/facebook_session/helper.rb,
lib/facebook_session/session.rb,
lib/facebook_session/version.rb,
lib/facebook_session/signed_request.rb

Defined Under Namespace

Modules: Helper Classes: Session, SignedRequest

Constant Summary collapse

VERSION = 
"0.0.4"

Class Method Summary collapse

Class Method Details

.application_id ⇒ Object 



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# File 'lib/facebook_session.rb', line 23

def application_id
  self.config[:application_id]
end

.application_secret ⇒ Object 



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# File 'lib/facebook_session.rb', line 27

def application_secret
  self.config[:application_secret]
end

.base64_url_decode(string) ⇒ Object 



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# File 'lib/facebook_session.rb', line 31

def base64_url_decode(string)
  encoded_string = string.gsub('-','+').gsub('_','/')
  encoded_string += '=' while (encoded_string.length % 4 != 0)
  Base64.decode64(encoded_string)
end

.config ⇒ Object 



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# File 'lib/facebook_session.rb', line 8

def config
  @@config ||= {}
end

.config? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/facebook_session.rb', line 12

def config?
  self.config[:application_id] && self.config[:application_secret] ? true : false
end

.configure(options = {}) ⇒ Object 



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# File 'lib/facebook_session.rb', line 16

def configure(options={})
  options.each do |key, val|
    self.config[key.to_sym] = val
  end
  self.config
end

.decode_payload(string) ⇒ Object 



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# File 'lib/facebook_session.rb', line 37

def decode_payload(string)
  encoded_sig, payload = string.split('.')
  sig             = base64_url_decode(encoded_sig)
  decoded_payload = JSON.parse(base64_url_decode(payload))
  decoded_payload.symbolize_keys!

  expected_sig = OpenSSL::HMAC.digest(
    OpenSSL::Digest::Digest.new('sha256'),
    FacebookSession.application_secret,
    payload
  )

  if sig == expected_sig
    decoded_payload
  else
    nil
  end
end