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# API references:
#
# * https://html.spec.whatwg.org/multipage/comms.html#network
# * https://dom.spec.whatwg.org/#interface-eventtarget
# * https://dom.spec.whatwg.org/#interface-event
require 'forwardable'
require 'stringio'
require 'uri'
require 'eventmachine'
require 'websocket/driver'
module Faye
autoload :EventSource, File.expand_path('../eventsource', __FILE__)
autoload :RackStream, File.expand_path('../rack_stream', __FILE__)
class WebSocket
root = File.expand_path('../websocket', __FILE__)
autoload :Adapter, root + '/adapter'
autoload :API, root + '/api'
autoload :Client, root + '/client'
autoload :SslVerifier, root + '/ssl_verifier'
ADAPTERS = {
'goliath' => :Goliath,
'rainbows' => :Rainbows,
'thin' => :Thin
}
def self.determine_url(env, schemes = ['wss', 'ws'])
scheme = schemes[secure_request?(env) ? 0 : 1]
host = env['HTTP_HOST']
path = env['PATH_INFO']
query = env['QUERY_STRING'].to_s
scheme + '://' + host + path + (query.empty? ? '' : '?' + query)
end
def self.ensure_reactor_running
Thread.new { EventMachine.run } unless EventMachine.reactor_running?
Thread.pass until EventMachine.reactor_running?
end
def self.load_adapter(backend)
const = Kernel.const_get(ADAPTERS[backend]) rescue nil
require(backend) unless const
path = File.expand_path("../adapters/#{ backend }.rb", __FILE__)
require(path) if File.file?(path)
end
def self.secure_request?(env)
return true if env['HTTPS'] == 'on'
return true if env['HTTP_X_FORWARDED_SSL'] == 'on'
return true if env['HTTP_X_FORWARDED_SCHEME'] == 'https'
return true if env['HTTP_X_FORWARDED_PROTO'] == 'https'
return true if env['rack.url_scheme'] == 'https'
return false
end
def self.websocket?(env)
::WebSocket::Driver.websocket?(env)
end
attr_reader :env
include API
def initialize(env, protocols = nil, options = {})
WebSocket.ensure_reactor_running
@env = env
@url = WebSocket.determine_url(@env)
super(options) { ::WebSocket::Driver.rack(self, :max_length => options[:max_length], :protocols => protocols) }
@driver_started = false
@stream = Stream.new(self)
if callback = @env['async.callback']
callback.call([101, {}, @stream])
end
end
def start_driver
return if @driver.nil? || @driver_started
@driver_started = true
EventMachine.schedule { @driver.start }
end
def rack_response
start_driver
[ -1, {}, [] ]
end
class Stream < RackStream
def fail
@socket_object.__send__(:finalize_close)
end
def receive(data)
@socket_object.__send__(:parse, data)
end
end
end
end
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