Class: Summon::FaradayMiddleware::SummonAuthentication

Inherits:
Faraday::Middleware
  • Object
show all
Defined in:
lib/summon/faraday_middleware/summon_authentication.rb

Constant Summary collapse

AUTH_HEADER = 
'Authorization'.freeze
HOST_HEADER = 
'Host'
SUMMON_PREFIX = 
'Summon'.freeze
SUMMON_DATE = 
'x-summon-date'.freeze
SUMMON_SESSION = 
'x-summon-session-id'.freeze
CONTENT_TYPE = 
'Content-Type'.freeze
ACCEPT_HEADER = 
'Accept'.freeze
TYPE_URLENCODED = 
'application/x-www-form-urlencoded; charset=utf8'.freeze
Error = 
Class.new(StandardError)
AuthenticationError = 
Class.new(Error)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ SummonAuthentication

Returns a new instance of SummonAuthentication.



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 34

def initialize(app, options = {})
  super(app)
  @access_id  = options.fetch(:access_id)  { |name| handle_missing_parameter(name) }
  @secret_key = options.fetch(:secret_key) { |name| handle_missing_parameter(name) }
  @client_key = options[:client_key]
  @session_id = options[:session_id]
end

Instance Attribute Details

#access_id ⇒ Object

Returns the value of attribute access_id.



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 21

def access_id
  @access_id
end

#secret_key ⇒ Object

Returns the value of attribute secret_key.



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 21

def secret_key
  @secret_key
end

Instance Method Details

#authorization(env) ⇒ Object 



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 54

def authorization(env)
  value = [access_id, client_key, digest(env)].compact.join(';')
  "#{SUMMON_PREFIX} #{value}"
end

#call(env) ⇒ Object 



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 23

def call(env)
  uri = env[:url]
  headers = env[:request_headers]
  headers[CONTENT_TYPE]   = TYPE_URLENCODED
  headers[HOST_HEADER]    = "#{uri.host}:#{uri.port}"
  headers[SUMMON_DATE]    = httpdate
  headers[SUMMON_SESSION] = session_id
  headers[AUTH_HEADER]    = authorization(env)
  @app.call(env)
end

#client_key ⇒ Object 



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 50

def client_key
  @client_key.upcase if @client_key
end

#digest(env) ⇒ Object 



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 59

def digest(env)
  uri     = env[:url]
  headers = env[:request_headers]
  data = []
  data << headers.fetch(ACCEPT_HEADER) { |name| handle_missing_header(name) }
  data << headers.fetch(SUMMON_DATE)   { |name| handle_missing_header(name) }
  data << headers.fetch(HOST_HEADER)   { |name| handle_missing_header(name) }
  data << uri.path
  data << sort_query_params(uri.query)
  data << ''
  Digest::HMAC.base64digest(data.join("\n"), @secret_key, Digest::SHA1).chomp
end

#httpdate ⇒ Object 



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 42

def httpdate
  Time.now.httpdate
end

#session_id ⇒ Object 



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# File 'lib/summon/faraday_middleware/summon_authentication.rb', line 46

def session_id
  @session_id ||= generate_session_id
end