Method: FTW::WebSocket::Rack#initialize

Defined in:
lib/ftw/websocket/rack.rb

#initialize(rack_env) ⇒ Rack

Create a new websocket rack helper… thing.

Parameters:

  • rack_env —

    the ‘env’ bit given to your Rack application



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# File 'lib/ftw/websocket/rack.rb', line 31

def initialize(rack_env)
  @env = rack_env
  @handshake_errors = []

  # RFC6455 section 4.2.1 bullet 3
  expect_equal("websocket", @env["HTTP_UPGRADE"],
               "The 'Upgrade' header must be set to 'websocket'")
  # RFC6455 section 4.2.1 bullet 4
  # Firefox uses a multivalued 'Connection' header, that appears like this:
  #   Connection: keep-alive, Upgrade
  # So we have to split this multivalue field. 
  expect_equal(true,
               @env["HTTP_CONNECTION"].split(/, +/).include?("Upgrade"),
               "The 'Connection' header must be set to 'Upgrade'")
  # RFC6455 section 4.2.1 bullet 6
  expect_equal("13", @env["HTTP_SEC_WEBSOCKET_VERSION"],
               "Sec-WebSocket-Version must be set to 13")

  # RFC6455 section 4.2.1 bullet 5
  @key = @env["HTTP_SEC_WEBSOCKET_KEY"] 

  @parser = FTW::WebSocket::Parser.new
end